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MY INTELLIGENT CURVE TRACER The Vds-Id curve only show Vds=0~1V range,so you can use system’s calculate function get the slope value, The window in the central show six curve’s slope, Measurement unit is V/mA, multiplicate 1000 is Rds, So under Vgs=10V,Rds is 0.000334649870637804*1000=0.334ohm. Somediode V->I curve.
SWITCHES MBB OR BBM
Take a mic pre gain control for example, With non-shorting (BBM) contacts the gain momentarily drops to the minumum between each switch position but with shorting (MBB) contacts the gain jumps above the next setting. On balance I think I would prefer a generaly small upward gain increase rather than a potentialy large downward drop ingain so I
TELEFUNKEN EF800 / EF802 TUBES Clearing out my Valvo EF86 stocks, factory selected with red or white "5" codes on the bottom, all selected by me for microphones(low noise/low microphonics in real U67 circuit tester) also tested in calibrated tube tester all above 100%, matched pairs available. singleprice 50EUR per pcs
VINTAGE 2N3055 NEVE
The two parameters that would most probably have been of greatest interest to Rupert were gain and gain bandwidth product. Both of these would probably have varied over quite a wide range in the 2N3055. Rupert is a great believer in NFB and to make it work best you need to maximise the open loop gain and bandwidth. POOR MAN'S PULTEC EQP1-A Apr 8, 2011. #1. I have had an idea for a poor man's version of the Pultec EQP1-A. Low boost/cut and hi cut just as the EQP1-A with the hi boost modified to not need an inductor (based on the Helios Type 69 EQ). So just four pots (no bandwidth control) and a couple of cheap Lorlin 2 pole 6 way switches will give us 6 lo and 6 hi frequencies CHINESE CAPSULES DEVELOPMENT 797 ETC Without buying very Chinese capsule myself I would love to know what are people's opinions of the quality nowadays? I had 797 capsules from 90s Rode NT1 and NT2 which are totally useable and I have a few Alctron/Tbone/generic capsules FS: AMI TAB FUNKENWERK T8 (NEUMANN KM84 TRANSFORMER Hi guys, I'm selling a whole bunch of microphone stuff that I don't plan on using right now. AMI Tab Funkenwerk T8 still available.-----AMI Tab Funkenwerk T8 transformer - 100 € HOW DO I DRILL A BACK PANEL FOR XLR CONNECTIONS? Hey guys, I'm building a dual 1176, and it's my first diy project, so I have some pretty dumb questions. I just ordered a 19" chassis from par-metal, but I'm wondering how the heck to drill the back panel for the xlr connectors and the ac plug. GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMS GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
MY INTELLIGENT CURVE TRACER The Vds-Id curve only show Vds=0~1V range,so you can use system’s calculate function get the slope value, The window in the central show six curve’s slope, Measurement unit is V/mA, multiplicate 1000 is Rds, So under Vgs=10V,Rds is 0.000334649870637804*1000=0.334ohm. Somediode V->I curve.
SWITCHES MBB OR BBM
Take a mic pre gain control for example, With non-shorting (BBM) contacts the gain momentarily drops to the minumum between each switch position but with shorting (MBB) contacts the gain jumps above the next setting. On balance I think I would prefer a generaly small upward gain increase rather than a potentialy large downward drop ingain so I
TELEFUNKEN EF800 / EF802 TUBES Clearing out my Valvo EF86 stocks, factory selected with red or white "5" codes on the bottom, all selected by me for microphones(low noise/low microphonics in real U67 circuit tester) also tested in calibrated tube tester all above 100%, matched pairs available. singleprice 50EUR per pcs
VINTAGE 2N3055 NEVE
The two parameters that would most probably have been of greatest interest to Rupert were gain and gain bandwidth product. Both of these would probably have varied over quite a wide range in the 2N3055. Rupert is a great believer in NFB and to make it work best you need to maximise the open loop gain and bandwidth. POOR MAN'S PULTEC EQP1-A Apr 8, 2011. #1. I have had an idea for a poor man's version of the Pultec EQP1-A. Low boost/cut and hi cut just as the EQP1-A with the hi boost modified to not need an inductor (based on the Helios Type 69 EQ). So just four pots (no bandwidth control) and a couple of cheap Lorlin 2 pole 6 way switches will give us 6 lo and 6 hi frequencies CHINESE CAPSULES DEVELOPMENT 797 ETC Without buying very Chinese capsule myself I would love to know what are people's opinions of the quality nowadays? I had 797 capsules from 90s Rode NT1 and NT2 which are totally useable and I have a few Alctron/Tbone/generic capsules FS: AMI TAB FUNKENWERK T8 (NEUMANN KM84 TRANSFORMER Hi guys, I'm selling a whole bunch of microphone stuff that I don't plan on using right now. AMI Tab Funkenwerk T8 still available.-----AMI Tab Funkenwerk T8 transformer - 100 € HOW DO I DRILL A BACK PANEL FOR XLR CONNECTIONS? Hey guys, I'm building a dual 1176, and it's my first diy project, so I have some pretty dumb questions. I just ordered a 19" chassis from par-metal, but I'm wondering how the heck to drill the back panel for the xlr connectors and the ac plug. MKH416 P48 | GROUPDIY Can someone help me for circuit diagram of this sennheiser microphone?Thanks
WTB: 2503 TYPE OUTPUT TRANSFORMERS I would like to buy a pair of 2503 type output transformers with flying leads. I have a pair of Ed Andersson 2623 (pcb mount) to trade if there's an interest. I've also got a Silent Arts LA-2A PCB rev02. WEIRD CONTINUITY WITH MULTIMETER Sep 11, 2009. #7. I have been building circuits for over fifty years, now. I have never used a continuity tester to check-out active circuits (with tubes, transistors, diodes or capacitors). I have used the continuity tester to puzzle out a maze of wires or switches. S.ENGRAVING INK-FILL
Rub some paint in it, wipe off the excess. Let it dry, and rub it down again if it's not clean enough. The rest is all what works for you. A small tin of acrylic paint will last a long time. Don't over think it, just do it. If you don't dig the result, use some spirits to remove the paint and hit it again. STUDIOMASTER 300B AMPLIFIER SCHEMATIC! hey duka, here´s the input section of a studiomaster diamond, maybeit helps.-max
LUKE AUDIO CK12 CAPSULES? Sacramento, CA. Jan 31, 2021. #12. Mics I have with Luke Audio capsules: (2) M49b-inspired with Flea F49 backplates modded by Allen Luke and with 1-micron Mylar and gold deposited. (2) Stephen Paul C12 mod-inspired with Tim Campbell CT12 backplates modded by Allen Luke and with 1-Micron Mylar and platinum deposited. 5532 REPLACEMENT AND IMPROVED!! May 18, 2005. #8. What's particulary interesting regarding the NJM2114 is that it is not just another high performance opamp but specifically designed as a supercharged 5532. It has the same operating parameters such as +/- 22V rails but improved audio performance. Plus it is cheap and available in various packages.TL783 QUESTION
That 125 volts is the maximum difference between the input voltage and regulated output voltage, not the maximum regulated output voltage. More than 125 volts difference or less than 1.25 between input and output and it can't regulate. CAPACITOR LEAKAGE TESTER A cheap digital insulation resistance meter can provide a variety of useful functions, including as an excellent capacitor leakage tester. My unit tests at 100, 250, 500 and 1kVDC, with the benefit that it is designed to be safe, convenient, and has a current limited supply. TIM CAMPBELL VS BEESNEEZ VS HEISERMAN CK12 CAPSULES They all seem to be around $500 in my currency (Beesneez is roughly $440, AUD and CAD are quite close). The on axis response which is what I heard sounds pretty much the same on both the CT12 and BCK12, didn't hear off axis, or any tests other than vocals or acoustic guitar, but they definitely have that CK12 sound I like. M. GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMS GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
WEIRD CONTINUITY WITH MULTIMETER Sep 11, 2009. #7. I have been building circuits for over fifty years, now. I have never used a continuity tester to check-out active circuits (with tubes, transistors, diodes or capacitors). I have used the continuity tester to puzzle out a maze of wires or switches. S. POOR MAN'S PULTEC EQP1-A Apr 8, 2011. #1. I have had an idea for a poor man's version of the Pultec EQP1-A. Low boost/cut and hi cut just as the EQP1-A with the hi boost modified to not need an inductor (based on the Helios Type 69 EQ). So just four pots (no bandwidth control) and a couple of cheap Lorlin 2 pole 6 way switches will give us 6 lo and 6 hi frequencies STUDIOMASTER 300B AMPLIFIER SCHEMATIC! hey duka, here´s the input section of a studiomaster diamond, maybeit helps.-max
HAUFE TRANSFORMERS
Are Haufe transformers available new? I've never seen them in the U.S. I'm in need of some transformers. I want to test a few different types. The Haufe transformers that Neumann used are incredibly good sounding. From the PV46 line amp, to the input on CHINESE CAPSULES DEVELOPMENT 797 ETC Without buying very Chinese capsule myself I would love to know what are people's opinions of the quality nowadays? I had 797 capsules from 90s Rode NT1 and NT2 which are totally useable and I have a few Alctron/Tbone/generic capsules BEYER MC734 CAPSULE REPAIR & TUNING / GRILLE MODIFICATION Hi everybody, my Beyer mic had a problem: low output along with very strange sound. So I took it apart and found quite a mess. The MC734 is a stage vocal mic (condenser). The capsule was just wrapped in foam and stuck into the grillecap. By now this foam wrapping hasdeteriorated pretty
COIL WINDER
Location. n. Aug 23, 2004. #1. I have a broken winding machine built by the "coil winding equipment company" I am fixing. It has cams and gears to set the patterns. I googled the name but did not find anything yet. I am looking for a manual that might have the setups written down. The motor and wiring need to be fixed rust removed etc. HOW DO I DRILL A BACK PANEL FOR XLR CONNECTIONS? Hey guys, I'm building a dual 1176, and it's my first diy project, so I have some pretty dumb questions. I just ordered a 19" chassis from par-metal, but I'm wondering how the heck to drill the back panel for the xlr connectors and the ac plug. GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMS GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
WEIRD CONTINUITY WITH MULTIMETER Sep 11, 2009. #7. I have been building circuits for over fifty years, now. I have never used a continuity tester to check-out active circuits (with tubes, transistors, diodes or capacitors). I have used the continuity tester to puzzle out a maze of wires or switches. S. POOR MAN'S PULTEC EQP1-A Apr 8, 2011. #1. I have had an idea for a poor man's version of the Pultec EQP1-A. Low boost/cut and hi cut just as the EQP1-A with the hi boost modified to not need an inductor (based on the Helios Type 69 EQ). So just four pots (no bandwidth control) and a couple of cheap Lorlin 2 pole 6 way switches will give us 6 lo and 6 hi frequencies STUDIOMASTER 300B AMPLIFIER SCHEMATIC! hey duka, here´s the input section of a studiomaster diamond, maybeit helps.-max
HAUFE TRANSFORMERS
Are Haufe transformers available new? I've never seen them in the U.S. I'm in need of some transformers. I want to test a few different types. The Haufe transformers that Neumann used are incredibly good sounding. From the PV46 line amp, to the input on CHINESE CAPSULES DEVELOPMENT 797 ETC Without buying very Chinese capsule myself I would love to know what are people's opinions of the quality nowadays? I had 797 capsules from 90s Rode NT1 and NT2 which are totally useable and I have a few Alctron/Tbone/generic capsules BEYER MC734 CAPSULE REPAIR & TUNING / GRILLE MODIFICATION Hi everybody, my Beyer mic had a problem: low output along with very strange sound. So I took it apart and found quite a mess. The MC734 is a stage vocal mic (condenser). The capsule was just wrapped in foam and stuck into the grillecap. By now this foam wrapping hasdeteriorated pretty
COIL WINDER
Location. n. Aug 23, 2004. #1. I have a broken winding machine built by the "coil winding equipment company" I am fixing. It has cams and gears to set the patterns. I googled the name but did not find anything yet. I am looking for a manual that might have the setups written down. The motor and wiring need to be fixed rust removed etc. HOW DO I DRILL A BACK PANEL FOR XLR CONNECTIONS? Hey guys, I'm building a dual 1176, and it's my first diy project, so I have some pretty dumb questions. I just ordered a 19" chassis from par-metal, but I'm wondering how the heck to drill the back panel for the xlr connectors and the ac plug. BANZAI'S KM84 DIY BODY & PCB KIT BUILD THREAD The tabs of the plastic spring connector need to be widened for the board to fit inside them. They're 1.4mm slots – our boards are 1.6mm. Lastly, once the body is fully assembled, you need to trim the pin of the spring connector flush with the top of the body tube. Screw on capsule, and done. WEIRD CONTINUITY WITH MULTIMETER Sep 11, 2009. #7. I have been building circuits for over fifty years, now. I have never used a continuity tester to check-out active circuits (with tubes, transistors, diodes or capacitors). I have used the continuity tester to puzzle out a maze of wires or switches. S. LUKE AUDIO CK12 CAPSULES? Sacramento, CA. Jan 31, 2021. #12. Mics I have with Luke Audio capsules: (2) M49b-inspired with Flea F49 backplates modded by Allen Luke and with 1-micron Mylar and gold deposited. (2) Stephen Paul C12 mod-inspired with Tim Campbell CT12 backplates modded by Allen Luke and with 1-Micron Mylar and platinum deposited. MOTOWN DIRECT AMPLIFIER-INSPIRED PREAMP? The Don Audio GSSL transformer at about £40 would also do the job. Its 9V secondary can be used to make a dc heater supply for those who prefer it. Hey Ian, this might be considered a thread hi-jack but worth a shot: Do you have any experience with that particular DonAudio power
48V OPAMP CHIPS,
48V max so bi-polar +/- 24V. anyway the idea was/is simple to it run from a single psu source of +/- 24V. since the units in question are a mix of discrete opamps and ic chips, why not have ic chips that run on the same voltages as the doa's and drive down cost a bit. however after some thought I am rethinking my issue. CAPACITOR LEAKAGE TESTER A cheap digital insulation resistance meter can provide a variety of useful functions, including as an excellent capacitor leakage tester. My unit tests at 100, 250, 500 and 1kVDC, with the benefit that it is designed to be safe, convenient, and has a current limited supply. POWER SUPPLY CAPACITOR KEEPS BLOWING I am building a mic preamp and have now blown this electrolytic cap twice. It is in the phantom power circuit. As far as I am aware, these blow from being installed backwards, or over voltage. When it blew, I was measuring 48vdc from the output, but it may have been negative(things
G.TEN 500 SERIES GRAPHIC EQ (V3 IN STOCK NOW) G.TEN is a 500 series format ten-band graphic equalizer. It’s a great sounding and easy to set EQ with all the important musical frequency points. . It’s great for shaping drums, guitars or any other sources where you need a great sound and fast setup. Schematicwas
UTC-A10 VS UTC-A11
I have built 2 Federal compressors with one of each input transformer and the A11 has much more gain. Should I look at the trannies ortroubleshoot
TIM CAMPBELL VS BEESNEEZ VS HEISERMAN CK12 CAPSULES They all seem to be around $500 in my currency (Beesneez is roughly $440, AUD and CAD are quite close). The on axis response which is what I heard sounds pretty much the same on both the CT12 and BCK12, didn't hear off axis, or any tests other than vocals or acoustic guitar, but they definitely have that CK12 sound I like. M. GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMSGROUPDIY GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside SPRING REVERB CIRCUIT OSCILLATION Hi, I made a spring reverb circuit using this schematic: I'm driving the reverb tank using this circuit: Everything sounds pretty good except when I'm hitting the reverb circuit too hard the recovery circuit starts to oscillate a high frequency that doesn't fade away until I'm disconnecting G.TEN 500 SERIES GRAPHIC EQ (V3 IN STOCK NOW) G.TEN is a 500 series format ten-band graphic equalizer. It’s a great sounding and easy to set EQ with all the important musical frequency points. . It’s great for shaping drums, guitars or any other sources where you need a great sound and fast setup. Schematicwas
DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
SILENT BYPASS SWITCH A noiseless switch is necessarily based on a time-variable element*, which a relay is not. A relay breabs or establishes contact in a very abrupt way, going from a fraction of ohm to several Megohms in a fraction of second. Silent switching requires a timed transition of RACK CASES | GROUPDIY Been a few years since I bought a case. Can't seem to find any at reasonable cost. Any suggestions?COIL WINDER
I have a broken winding machine built by the "coil winding equipment company" I am fixing. It has cams and gears to set the patterns. I googled the name but did not find anything yet. I am looking for a manual that might have the setups written down. The motor and wiringneed to be fixed
"U67"-ISH MICROPHONE RuudNL. Just for fun, I recently put together a "U67"-ish microphone. It is a kind of mix between a U67 and a U87. The microphone works as expected, sounds good and I don't hear any difference between this microphone and a U87ai. Measured self noise is 2 dB higher than a U87ai. Not too bad, but maybe a better EF86/EF806 could improve this. PEAVEY AMR-1600 CONSOLE SCHEMOS Hi all, Anybody have schematics for a Peavey AMR-1600 ProductionConsole? Thanks,
NEUMANN OA10 DISCRETE OP-AMP (IN API 2520 ETC. FORMAT 610. Jun 15, 2009. #1. Classic Neumann OA10 discrete op-amp converted to more usefull API2520 (and many others) format. This is something that I designed a few years ago and I even built a prototype but never had time to do the listening tests Documents: Schematic. GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMSGROUPDIY GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside SPRING REVERB CIRCUIT OSCILLATION Hi, I made a spring reverb circuit using this schematic: I'm driving the reverb tank using this circuit: Everything sounds pretty good except when I'm hitting the reverb circuit too hard the recovery circuit starts to oscillate a high frequency that doesn't fade away until I'm disconnecting G.TEN 500 SERIES GRAPHIC EQ (V3 IN STOCK NOW) G.TEN is a 500 series format ten-band graphic equalizer. It’s a great sounding and easy to set EQ with all the important musical frequency points. . It’s great for shaping drums, guitars or any other sources where you need a great sound and fast setup. Schematicwas
DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
SILENT BYPASS SWITCH A noiseless switch is necessarily based on a time-variable element*, which a relay is not. A relay breabs or establishes contact in a very abrupt way, going from a fraction of ohm to several Megohms in a fraction of second. Silent switching requires a timed transition of RACK CASES | GROUPDIY Been a few years since I bought a case. Can't seem to find any at reasonable cost. Any suggestions?COIL WINDER
I have a broken winding machine built by the "coil winding equipment company" I am fixing. It has cams and gears to set the patterns. I googled the name but did not find anything yet. I am looking for a manual that might have the setups written down. The motor and wiringneed to be fixed
"U67"-ISH MICROPHONE RuudNL. Just for fun, I recently put together a "U67"-ish microphone. It is a kind of mix between a U67 and a U87. The microphone works as expected, sounds good and I don't hear any difference between this microphone and a U87ai. Measured self noise is 2 dB higher than a U87ai. Not too bad, but maybe a better EF86/EF806 could improve this. PEAVEY AMR-1600 CONSOLE SCHEMOS Hi all, Anybody have schematics for a Peavey AMR-1600 ProductionConsole? Thanks,
NEUMANN OA10 DISCRETE OP-AMP (IN API 2520 ETC. FORMAT 610. Jun 15, 2009. #1. Classic Neumann OA10 discrete op-amp converted to more usefull API2520 (and many others) format. This is something that I designed a few years ago and I even built a prototype but never had time to do the listening tests Documents: Schematic.A DUAL LA2A
Berlin, Germany. Apr 7, 2007. #1. Gentlemen, may I present you the D-LA2A: it was not easy to fit the two channels in a 2U rack, but with a little care it worked: it was my first self designed double sided PCB, and my first Tube project. THE SIMPLEST OPTO COMPRESSOR IMAGINIBLE Likewise IF you do need to slam the LDR below 1K, meaning more than a few mA in the LED, the voltage drop across a 1K feed resistor makes loop voltage rise from ~~4.5V at just-glow to >10V at full-slam. Soft action. And seeing that the LED is fed from an PUSH-PULL MICROPHONE PREAMP WITH UTC LS AND TAMURA Indeed, I mentioned this already in post #8: "Moreover I like the idea of using opposite triodes correcting each other when wired in a long tail circuit. Idem dito for the 'crossed feedback' connecting the opposite sides." In my opinion this is one of the qualities of thedesign Interesting
IS THERE A TOOL TO UNDO THESE KNOBS? looks like sifam or selco knobs. one of 2 common tools one should have but does not. It's a nut driver for these and a collet tool for the smaller knobs. the collet tool can come in different sizes based onthe collet size.
POTENTIOMETERS CAUSING VOLTAGE RAILS SHORT?! Hello there, I'm currently prototyping/building my own synthesiser which use ±15V on the supply rails. The front-panel board which hosts all potentiometers will sometimes short the +15V rail to GND when all potentiometers are soldered in. I simply can't find the problem and itmakes no sense
SSL 292 EQ MOD?
Hi I´m currently re-capping and restoring an SSL4048G+ console which unfortunately has every channel loaded with the 292 eq´s. I know there is a mod out there to get rid of the 'Q changing proportional to gain settings' so it behaves more like the earlier EQ revisions which have the Q independent of the gain settings. WEIRD CONTINUITY WITH MULTIMETER So I'm finishing up a build, and I was going through my normal pre-power up tests. I went around the circuit checking continuity - to make sure it is where it should be and isn't where it shouldn't be - and I encountered something bizarre and I wanted to see if anyone might know what the deal VIDEO: DACHMAN AUDIO DA-87I (U87 CLONE) Hello group, For anyone interested to see what’s in the new U87 DIY kit from Dachman Audio, i.e. the DA-87i, I made a video POWER SUPPLY CAPACITOR KEEPS BLOWING I am building a mic preamp and have now blown this electrolytic cap twice. It is in the phantom power circuit. As far as I am aware, these blow from being installed backwards, or over voltage. When it blew, I was measuring 48vdc from the output, but it may have been negative(things
DIY INLINE PREAMP (TRITON FETHEAD) The preamp is working but it has more noise than i expected. It might be a problem of my Audio Interface Phantom Power. I made a comparison with two MD 421, one connected by the triton and one directly to the interface. Phantom power is applied to both channels. The noise on the channel without the triton raises when p48 is activated so i guess GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMSGROUPDIY GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside SPRING REVERB CIRCUIT OSCILLATION Hi, I made a spring reverb circuit using this schematic: I'm driving the reverb tank using this circuit: Everything sounds pretty good except when I'm hitting the reverb circuit too hard the recovery circuit starts to oscillate a high frequency that doesn't fade away until I'm disconnecting DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
G.TEN 500 SERIES GRAPHIC EQ (V3 IN STOCK NOW) Hello groupdiy'ers! I'm happy to say that: Garash G.TEN V3 - third revision is available for purchase. Garash G.TEN - ten band graphic equalizer in 500 series format. G.TEN is a 500 series format ten-band graphic equalizer. It’s a great sounding and easy to set EQ with all the important musical frequency points. "U67"-ISH MICROPHONE Just for fun, I recently put together a "U67"-ish microphone. It is a kind of mix between a U67 and a U87. The microphone works as expected, sounds good and I don't hear any difference between this microphone and a U87ai. Measured self noise is 2 dB higher than a U87ai. Not toobad, but maybe a
SILENT BYPASS SWITCH R51 470k will NOT keep C47 100uFd totally drained, especially at mike level. The TL072 will drive 2K fairly well, R51 R52 can just as well be 10k and get 1/50th the leakage voltage. NEUMANN OA10 DISCRETE OP-AMP (IN API 2520 ETC. FORMAT Classic Neumann OA10 discrete op-amp converted to more usefull API2520 (and many others) format. This is something that I designed a few years ago and I even built a prototype but never had time to do the listening tests Documents: Schematic PEAVEY AMR-1600 CONSOLE SCHEMOS Hi all, Anybody have schematics for a Peavey AMR-1600 ProductionConsole? Thanks,
CHINESE BM800 REVIEW / MOD / UPGRADE (MOD CIRCUIT & BOARDS Because of Mr. Spencerleehorton, i decided to spring for a few of these uber-cheap BM800 / BM700 electret mics - primarily as body donors. I went for the blue/silver version, at least because it seemed less garish than the black/gold one And i specifically looked for one with METAL shockmounts because IS THERE A UK EQUIVALENT TO MCMASTER CARR? I wish there was - and I'd love to know if there is. As far as I know, there is nothing of equivalent scope. The UK is just not big enough and not enough people or companies actually make things any more for such a place to be viable. GROUPDIYBREWERYTRUTH TABLEMICROPHONESDYNAMIC PROCESSORSPREAMPLIFIERSMIXERS/MONITORING SYSTEMSGROUPDIY GroupDIY - Do It Yourself. Kick back, relax, and shoot the breeze~ Warning: bar-stool preachers inside SPRING REVERB CIRCUIT OSCILLATION Hi, I made a spring reverb circuit using this schematic: I'm driving the reverb tank using this circuit: Everything sounds pretty good except when I'm hitting the reverb circuit too hard the recovery circuit starts to oscillate a high frequency that doesn't fade away until I'm disconnecting DIY COMPATIBLE WAVES SOUNDGRID SERVER Hello, I would like to use the waves plugins in live sound mixing with a server. The Waves servers seem quite expensive for what is a box filled with standard PC components. I would like to build a compatible server myself. It seems the image of the soundgrid server software isincluded in the
G.TEN 500 SERIES GRAPHIC EQ (V3 IN STOCK NOW) Hello groupdiy'ers! I'm happy to say that: Garash G.TEN V3 - third revision is available for purchase. Garash G.TEN - ten band graphic equalizer in 500 series format. G.TEN is a 500 series format ten-band graphic equalizer. It’s a great sounding and easy to set EQ with all the important musical frequency points. "U67"-ISH MICROPHONE Just for fun, I recently put together a "U67"-ish microphone. It is a kind of mix between a U67 and a U87. The microphone works as expected, sounds good and I don't hear any difference between this microphone and a U87ai. Measured self noise is 2 dB higher than a U87ai. Not toobad, but maybe a
SILENT BYPASS SWITCH R51 470k will NOT keep C47 100uFd totally drained, especially at mike level. The TL072 will drive 2K fairly well, R51 R52 can just as well be 10k and get 1/50th the leakage voltage. NEUMANN OA10 DISCRETE OP-AMP (IN API 2520 ETC. FORMAT Classic Neumann OA10 discrete op-amp converted to more usefull API2520 (and many others) format. This is something that I designed a few years ago and I even built a prototype but never had time to do the listening tests Documents: Schematic PEAVEY AMR-1600 CONSOLE SCHEMOS Hi all, Anybody have schematics for a Peavey AMR-1600 ProductionConsole? Thanks,
CHINESE BM800 REVIEW / MOD / UPGRADE (MOD CIRCUIT & BOARDS Because of Mr. Spencerleehorton, i decided to spring for a few of these uber-cheap BM800 / BM700 electret mics - primarily as body donors. I went for the blue/silver version, at least because it seemed less garish than the black/gold one And i specifically looked for one with METAL shockmounts because IS THERE A UK EQUIVALENT TO MCMASTER CARR? I wish there was - and I'd love to know if there is. As far as I know, there is nothing of equivalent scope. The UK is just not big enough and not enough people or companies actually make things any more for such a place to be viable. G9 CHANNEL 1 TROUBLESHOOTING Hello everyone, i have just finished G9. Checked all supply voltages and they are fine. Then connected front panel boards for first audio test. Channel 2 runs ok with some minor issues (the common osc problem, etc, i leave them out of discussion for now). My main issue is that due to lack of APP STUDIO ING'S PRODUCTS f you need only the +Vcc and the +48 outs than you can connect the secondary's wires in other manner but some things must be done , so , since I need to give you a schematic and/or some indications I am sending them by email to you. Cool Thanks COMPLETE DIY U87 MICROPHONE KIT BY YUZU AUDIO Hey guys, Following my own experience of building DIY U87 microphones and various other pieces of gear, I've decided to offer a complete solution to help beginners get started with DIY audio without the need to scavenge for parts or read through endless forum posts in order tobuild a great
POTENTIOMETERS CAUSING VOLTAGE RAILS SHORT?! Hello there, I'm currently prototyping/building my own synthesiser which use ±15V on the supply rails. The front-panel board which hosts all potentiometers will sometimes short the +15V rail to GND when all potentiometers are soldered in. I simply can't find the problem and itmakes no sense
A DUAL LA2A
Gentlemen, may I present you the D-LA2A: it was not easy to fit the two channels in a 2U rack, but with a little care it worked: it was my first self designed double sided PCB, and my first Tube project. I'm glad everything is working :grin: I have hadproblems with gain
THE SIMPLEST OPTO COMPRESSOR IMAGINIBLE That's what I'm going for here. I'm working on an opto compression circuit for a larger project of mine called "Colour" which a search will turn up. I basically hacked away at the What Compressor / Weak Joe circuit until I thought I couldn't take WEIRD CONTINUITY WITH MULTIMETER So I'm finishing up a build, and I was going through my normal pre-power up tests. I went around the circuit checking continuity - to make sure it is where it should be and isn't where it shouldn't be - and I encountered something bizarre and I wanted to see if anyone might know what the deal VIDEO: DACHMAN AUDIO DA-87I (U87 CLONE) Hello group, For anyone interested to see what’s in the new U87 DIY kit from Dachman Audio, i.e. the DA-87i, I made a video POWER SUPPLY CAPACITOR KEEPS BLOWING I am building a mic preamp and have now blown this electrolytic cap twice. It is in the phantom power circuit. As far as I am aware, these blow from being installed backwards, or over voltage. When it blew, I was measuring 48vdc from the output, but it may have been negative(things
DIY INLINE PREAMP (TRITON FETHEAD) The schematic Rogs posted shows the 2nd pair of J-Fets connected as common gate to the first pair, in other words, a cascode connection. Cascode can be useful here (as I also wrote in the other thread) but I'm not sure that another pair of the same J-Fet type are the best choice as you generally want a bit more voltage across the bottom Fets than will be provided with a K170.__
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