dogfaceaudio said I'm looking for schematics for fully parametric EQ's from high end audio gear. The stock values are 560 and 2700r but with the 1645 you need 3000 and 270 respectively, this gives you the required output impedance of 100 ohms which is essential to give you the attack of the 660. A user asks if a schematic of a vari-mu compressor is correct and gets feedback from other users and experts on diyAudio forum. Microphone Meta This is a meta-thread, made to allow members to keep track of the posts concerning this single issue - I will continue re-editing this first post. com-- which is based around the 400 posts now in this thread (as at Dec 2019). Dec 9, 2022. Dec 5, 2023. Speaking of high-pass filters, I included one here to roll-off any mic or room rumble. Fully discrete signal path available. This is usually caused by not using shielded wire throughout. Lets build an analog EQ for the studio Studio gear is definitely expensive, but again we have an option to DIY and get awesome gear, faster. It's exactly what I need except the price is 100US. How to Register at GroupDiy. The pinout is definitely different looking than a 202 though. Dec 19, 2023. Gus Well-known member. They cost about &163;16 a pair which is about 25. and redraw the schematics in a way that would make for newbies easyer to understand the building blocks and how they work. 7 - Output capacitor Mundorf 10uf Supreme. They just don't soundbehave the same with modern lower resistanceinductance transformers. All build related materials and pics will be posted first, and please feel free to. EIN -122 dbm. For business advertising see White Market. Depending on how much room there is under the tanks, maybe an inch thick layer of low or medium density foam rubber might help. b) increase the left channel input gain. Documents related to the build (assembly, calibration, templates, etc. I fixed today an original John Cuniberti REAMP box. Lower noise, better line rejection, and at least in the case of the LM317, significantly lower output impedance. Hello GroupDIY, and excuse me for being new here. The workshop has been moved several times, and unfortunately I lost the CD that came with it. Also, if your phantom needs aren,t too much you can use a 7824 regulator with a 24V-1Watt zener diode connected from the pin 2 (normally ground pin) to ground to get 48 volts on output. Nov 3, 2021. 2, is. So the "output isolator" that I use (the Jensen Transformers JT-OLI-3) looks like zero ohms from DC to around 200 kHz, and 39. i calculated 1 (23,148200,1) 0,001941898 Hz. Hello GroupDIY, and excuse me for being new here. 1 of 2 Go to page. For Sale Tranformers, Capsulse, mic bodys, Psu, Tubes etc. Each one only took me a few minutes to solder the through hole parts, and these guys were ready to rock. Nov 4, 2010 1 Hi All, I finished a spiffy tube compressor that has some hum. Screw on capsule, and done. b) am researching reasonable mods for my Rode K2 (Mullard CV2492 and 1961 Valvo tubes on their way already) a) it appears I have one of approx three classic mic styles to choose from for the build 1) U47M49 Neuman 2) U87U67 Neuman, and 3) C12251 AKG. Measure resistance between blue and green wire on the terminal strip. Soldering pin 1 on input to the chasis with very short cable. Madison, WI. I am trying to get a nice colored sound out of it and. 8 KB &183; Views 108 Reply. The TIRDI-500 full kits are now 160 plus shipping. Dec 25, 2022 1 I found one schemo for a Marshall. radiance Well-known member. So other than replacing said feedback capacitor with a 470-680 pF one, what other mods are there. org, with a lot of good links for this type of projects KEV'S DIY GROUP PAGE ON RECORDING. A"Flat" K47 without the 5k bump of the original capsule And an all-custom K87 Retail prices 119 for the Flat K47. Apr 5, 2019. Sec 600150 split. As for sound properties, russian paper capacitors are great and relatively inexpensive - compared to boutique stuff, Jensen and such. Hi, im going to mod my v67 and wanted to get some opinions from people who had done the various mods that can be done on these. I'm hoping someone can assist in some fundamentals. The BA-3 program is the first of the broadcast types to incorporate feedback loops. As was true from the companies inception in 1962 (as Quad-Eight Sound) to. I've put the Bom into a Google docs spreadsheet. Connecting it as shown in the schematic (tying pin 2 and 3 together) would make a variable resistor. The original KM84 schematic lists the cardioid KK84 at 36pF, strangely the KM86 KK84 is listed at 33pF. We are proud to deliver a multi-functional PCB Gerber Viewer for free, our new GerberLogix Freeware Try it now www. Apr 1, 2013. Apr 25, 2021. PLEASE CONTACT ME THROUGH EMAIL FOR PURCHASING, NOT PM&39;S If you don&39;t see a project you are interested in chances are I am working on it now or would be. Sec 600150 split. I see that there are three pins on the edge connector that are used as "grounds" (I understand that this is probably not the most accurate term to apply to all three, but I'm going to use it generically here). Windows only. abbey road d enfer said Here&39;s the answer, from the horse&39;s mouth (Hemut at the LTSpice forum) The solution is using plot settings. It made a audible Diffrence and the Comp Filter Effects where almost completly gone. Latest JohnRoberts. I took out the input tranny and used the regular balanced input and am much happier. 1 day ago Looks like an oathkeeper got out of jail and shot up the CO court house, Police believe this incident to be unrelated to their decision to Barr trump from the primaries. You are using a normal resistors for the VR5 and VR6, so you should use the two holes right next to the ones you are using on your photo. Hello, I've got a couple of Drip EQ1s that I'm finishing putting together. All build related materials and pics will be posted first, and please feel free to post any technical, BOM, or assembly related questions. It's a 32 in-out, unbalanced, midi controlled, mutevolume automation rack unit. So, I just got my pair of RED-25 opamps, which are brand new to the Whistle Rock line. Nashville, Tn. Previous to the BA-1, RCA ran feedback loops in power amps, the OP-6 remote amp, and some other higher gain voltage and program amps. I'm working on a new product that requires a Lo ratio input transformer. Mar 13, 2012 Now I am reasonably happy with the poor man&39;s tube mic pre design I thought I might use it as the basis of a simple, easy to build tube mixer project. If the pharmacy of your choice doesn't sell acetone, go buy nail polish remover -- same stuff. For Sale FS Lundahl LL1527 mic. I repair studio and musical equipment in Dallas Texas and build the occasional piece of studio gear. It is a good sounding equalizer that I selected to be part of my mixer project. For cleaning PCBs, mix isopropanol (99) and acetone at a 91 ratio (e. ORG MNATS's 1176 PAGE - one of the best webpages covering this project - there even is an alternative PCB board layout MNATS's 1176 PAGE And NRG-Recording, Germany, also. Feb 12, 2017. Feb 24, 2021 The capsule is not the same, the new one is produced by their latest equipment, has different construction and therefore different response. Help Support GroupDIY Audio Forum J. Dec 19, 2023. Sep 24, 2014. I&39;v always wondered how a K47 capsule would sound in a C12 kind of circuit. That still leaves 42 for pots, transistors, caps, resistors and a home etched PCB per channel (plus shipping). Try the transformer at the preamp end first. Now I am reasonably happy with the poor man&39;s tube mic pre design I thought I might use it as the basis of a simple, easy to build tube mixer project. 33uF to 1. The slew rate is not particularly good but it is. Nov 22, 2017. They might just give you a scrap or two. Disclaimer I&39;m not making money by buildingrepairingmeasuring mics. I plan on building the preamps with zero negative feedback fixed gain with different pads and in his SRPP topology. Ben, The Jensen JT-DB-EEPC and Cinemag CM-DBX are some of the best DI-box transformer to day, but also Lundahl LL-1530, LL-15767778 and Sowter 4243, 8044 are a very good alternative with high quality. Dec 5, 2023. Joined Jun 7, 2004. Hi, I fixed today an original John Cuniberti REAMP box. Oct 12, 2017. I&39;ve been looking to buy an isolated power supply to feed my six or seven guitar pedals, but i&39;m not really happy with what options are out there. Dec 23, 2012 So these are the final Version , the square version (44mm 48mm) should fit the gt-2b style , and the round version is 60mm diameter should fit upcoming riggler mic body i have been able to fit 2 mounting hole as per riggler drawing of 5. It can be changed at any time with transformer or other curcuitry. 3 secs (1uF x 0. So first impressions- probably the best 10468 clone on. running mic input wires too close to line output wires (especially unshielded) having the 10468 (VTB9045) too close to LO1166 (VTB9049) malfunctioning 2N3055. 5inches deep. The only revision was the switch from 1537 VCA to DBX 2151 VCA in the early eighties. com rather than relying on forum to redirect. (Special thanks to the folks at www. Done for economy. GroupDIY Audio Forum. Latest Brian Roth. I will make an announcement in the announcement forum for everyone to update their links to www. Your support helps cover these expenses Receive -2- of these Group DIY Decals with your Annual Supporting. That still leaves 42 for pots, transistors, caps, resistors and a home etched PCB per channel (plus shipping). I'm sure you'll get neither the TLM's low noise floor nor the U87's sound by exchanging the capsule. I have an original BA6A which spent all of it&39;s previous life in a radio station transmitter rack. Note that typically preamps did not have any sort of gain control, and the BA-2 is a special case. Passive summing into a transformer (Neve mixers in the 70s used this) 2. That might look like this , Needs some polish and the square version is redone to miniaturize again for proper railing clearance and better connection scheme this square version should fit the GT2B body 4448mm and the aMI t49 just on the touch, will post picture soon. Heres a single EL84 plotted for 220v at the anode , seems accurate enough for the most part. TIRDI-500 PCB (including 4 knobs and front panels) 50. Oct 7, 2010. Joined Oct 23, 2010 Messages 39. 2) An interstage transformer was manufactured and applied, which solves many problems. please always include your forum name and location for a quote. Also check the resistor values around the gain switch. Joly completely ignores it, with no explanation. Hi, I bought this book "The Tube Amp Book" by Aspen Pittman a few years ago. The technology basically uses a conductiveresistive ink slurry, that gets screened onto the substrate to form the trace pattern. Joined Jul 12, 2009 Messages 642 Location London, UK. 6 mm dia, weight 1. META - Discrete Operational Amplifiers. Note there is a separate PCB for all the switches, for the sake of a easier build. Wood is MDF, originals have a type of PVC Cherry Veneer. This doesn&39;t look anything like a real C414. See the drawing attached. GroupDIY 51X Alliance is a project to create a modular format for DIY audio modules that uses an 18-pin card edge connector and allows the use of - 24 volt power rails. Apr 1, 2021 1. This PCB set is designed by Matador at the GroupDIY. Oct 17, 2005. They used an Altran C-2878 transformer, I can&39;t seem to find information about that transformer anywhere. RF does not like iron. Posted this under the Dynamics build section, maybe I should have put it here, my bad. The original unit slides into a 19" rack mount tray with connectors on the back. Essentially, the capsule needs to be cleaned more often if the rings are brass. I&39;m afraid this one comes up at regular intervals on different mic forums. 270M 0. 4 cm. The PCB footprint is identical to the previous C12 design, however more closely follows the circuit implementation of the ELA M251. running mic input wires too close to line output wires (especially unshielded) having the 10468 (VTB9045) too close to LO1166 (VTB9049) malfunctioning 2N3055. com if you have any interest. At some point, I saw that Dale had posted the drawings for an. This is a meta-thread, made to allow you to keep track of the posts concerning this single issue. This is not the definitive guide and you are welcome to add or suggest further links and I will update them. So if you&39;re reading this now, please update your bookmarksfavoritesetc to point to www. I&39;m not sure if they have -18V supplies. Mar 5, 2022. I&39;ve seached high and low on the net for a definitite, specific approach to modifying the Federal AM864U to vary attack and release times. Modern USB-C based ones can deliver actually as much as 20V5A and have 100Wh Lipo 18650 batteries. This is usually caused by not using shielded wire throughout. You are using a normal resistors for the VR5 and VR6, so you should use the two holes right next to the ones you are using on your photo. Sometimes after switching the unit on and off, the levels would act normal, but then the levels on the right channel would drop again. Dec 23, 2022 21 As someone sugested here before, can't remember who, it's kinda like focusing a great camera lens and playing with bokeh. Jan 3, 2018. In my Neve builds it sounds great. That is pretty much the reason to use tubes for my microphon builds. Next simulation run. I have some patch bays that I just hooked up and they have been sitting in storage for years and so have the cables. Joined Oct 23, 2010 Messages 39. Matt C Well-known member. Now I am the owner of a very heavy RockwellCollins IC-10A, a 10 channel stereo broadcast console. As for some background ; I've been DJing since 2006 and played my first gig in 2007. Nashville, Tn. Next Last. 28 output. This is not the definitive guide and you are welcome to add or suggest further links and I will update them. Feb 22, 2006. EIN -122 dbm. Everyone is welcome to reply with comments and pointers to things they consider relevant. Our ELA kit opts to retain the C12&x27;s 9 pattern PSU controlled polarizing scheme, so in that regard, it is a hybrid. if i use a 78L05 i tend to use a 100nF and a 10uF electrolytic. Nov 18, 2023. But a fixed bias arrangement of some sorts sounds better, with pentodes and to my ears at least. Hi, Usually I am dubious of any component stamped 'audio grade' as it can be a means to extract more cash from the gullible audiophile. Unless you have a desire to go into manufacturing, and assuming you wanted a T4 cell to behave EXACTLY like an original Urei T4 cell, it would be best to just purchase the Kenetek T4 opto cells. I have a 10852 line amp card, and have been working with it as a test rig to. Documents Schematic. To clarify, 1kHz at 1V in to pins 3-4 measures 1V on pins 8-2, and 0. As I understand, the stock 1uf cap paralleled with a 2M resistor. 33 with the corresponding realtime-patch. They used an Altran C-2878 transformer, I can't seem to find information about that transformer anywhere. We replaced the original 6SK76SN76SQ7 tubes with 7-9-pin glass tubes (2x 6BA6, 12AU7, 6AV6. It is perfect for any modification of a tube (C12 kit or Apex 460) or condenser microphone (C414 style), and a build of. 0dbfs from the forums here donated a handful of 6028 tubes he purchased in bulk on Ebay 0. 28 output. Jun 29, 2005. Sorry to dig up an old thread, but I am also looking for GroupDIY approval for the username JLuginbill from around March-April 2020. You&39;ve essentially got the RK87 and my capsule and that&39;s it, in your price range. Hi GroupdiY, Lately i was working with Oliver with his consent To make a little PCB kit to Build his version of the U47 with EF800 tube. View GroupDIY (www. As we all know Perception circuits are pure ripoff of u87, but don't sound like one because of the capsule. GroupDIY Audio Forum. In the link below you can find the BOM, a detailed building guide and some sound samples recording OH and some vocals with the mic. I'm aiming to do two d-87's, wired switchable for multi-pattern. One solution is a commercial Phone Charger portable battery. The current source has advantage mostly at low closed-loop gain. com if you have any interest. The interstage would need to be 50k on the primary or thereabouts but these are not really obtainable or affordable. And it is not difficult to achieve the. Horvitz from the forums here was kind enough to donate a PSU PCB for me. contact sales at51xAudio. 2, is. Feb 11, 2013. It doesn&39;t sound like a KM84 at all. Gus Well-known member. Right i&39;m all wired up as per the 553 schematic, just waiting for the inductors to arrive and then i&39;ll wind them. I picked this because it a CPB mounting version of the Carnhill VTB9046 which is pretty much the 31267 line input transformer we used at Neve back in the 70s. Live consoles with some Line inputs exist but are exceptions and not the norm. They are not available. 33uF to 1. Unless you have a desire to go into manufacturing, and assuming you wanted a T4 cell to behave EXACTLY like an original Urei T4 cell, it would be best to just purchase the Kenetek T4 opto cells. Jun 26, 2008. All further questions, issues, comments, etc - please refer. Note that typically preamps did not have any sort of gain control, and the BA-2 is a special case. The prices are 900RMB and 1300RMB. It used a 4 position slide switch on the front panel to vary gain in 10 dB increments from 0 to 30 dB (amplifier gain only excluding input transformer). Heres a single EL84 plotted for 220v at the anode , seems accurate enough for the most part. Sep 7, 2016. Hello, First of all, I have an idea. 10,000pF) and adjust the pot for maximum resistance value (20k to 50k). 5K split. They&39;re 1. radiance Well-known member. Jan 24, 2014 D-Elam 251E with True Pattern Switching on PSU , this was a very fun build. Los Angeles, CA. com site, but we managed to salvage the following links, sorry they are not in any type of order,. As the title states, this is the official buildsupport thread for the VP312. With the left channel increased by 2. Feb 24, 2021 The capsule is not the same, the new one is produced by their latest equipment, has different construction and therefore different response. When I use the auto router then pour my ground plane. Sec 600150 split. an A-18 may sound more correct than a modern replacement, even with the shift in operation. Wired as cardioid and on an original AKG C28b (6072, T141 etc), it sounds fantastic. BuySellTrade personal items. This means there will be no stop-pins or stickers shipped or required. As for some background ; I&39;ve been DJing since 2006 and played my first gig in 2007. it&39;s noisy So, I&39;m planning to customise the bento. Apr 22, 2014. Usually the transformer is actually fine though I will say I do generally prefer the sound of the Cinemag. Gothenburg, Sweden. Help Support GroupDIY Audio Forum M. They're a great, easy project, since the SMT parts are already mounted. A fabric or craft store might carry it. So in this way it is very musical indeed. It would be nice if all you needed to do was match the input R. Dec 19, 2023 Houston. anyway I started some mods today and did some measurements. I kinda&39; don&39;t like the giant wire-wound resistors, and I&39;m not sure I&39;m going to be able to source the correct pull-down resistor. For Sale FS Lundahl LL1527 mic. The input impedance is only 680 kOhm but its a "well known fact" that the minimum input impedance for a piezo pickup should be 1 Mohm to avoid loss of bass response, which is even more important for a double bass than a guitar. Next simulation run. Plot Settings -> Save Plot settings. mattenylander Active member. sportschatplace nfl, primcess peach porn
Electronics Schematic. . Groupdiy
All build related materials and pics will be posted first, and please feel free to post any technical, BOM, or assembly related questions. Oct 10, 2017 Marcelland. May 17, 2011. I have a dead memory battery in a Tascam Midiizer MTS-1000, SMPTE MTC Tape Multi Syncronizer controller, it&39;s a NiCd (Nicad) Sanyo Cadnica N-SB3 3. A fabric or craft store might carry it. Electronics Schematic. Berlin, Germany. You put it on the threads to prevent screws from working themselves loose. I have an output transformer with what appears to be an auxiliary speaker or feedback winding on the secondary. Any comparison to Aurora or other Mastering ADDA&180;s I can not find much about it in the www. Everyone is welcome to reply with comments and pointers to things they consider relevant. Help Support GroupDIY Audio Forum Prev. Resistor labels. Jan 12, 2022 The 252 EQ is very subtle and very noiseless, with not too much cut boost at each frequency, only what you would need for a track or mix that is fairly good to begin with. I am trying to get a nice colored sound out of it and. GroupDIY - Do it yourself (DIY) audio & electronics forum. Anyway, I&x27;ve been dreaming of making a rotary DJ mixer for about 10 years now. Jan 7, 2011. Nov 26, 2010 Collective Cases - PSU cases, ez1073, CLX cases and PCB&39;s. I think that, well designed and implemented, they just sound better than more recent analog technology, and not just better, but different. C6 and SW2 provide a HPF, but this one has a twist. The only difference with the Alctron is that mid range behaves more like high shelf in a way, but it could be that original hardware does that same curve, it doesn't mean plugins are right. Switches are Lorlin series CK. I know the B2 Pro is a pretty "well known" mod platform, for lack of a better word, due to it being a multipattern U87 copy with the negative feedback circuit in it. Turned out I had assembled two, so I swapped out the presumably bad DOA for the unused one. Mar 14, 2011 Things fixed in REV Grounding Scheme. Each phone output has its own amp and can choose between 4 stereo inputs. Aug 28, 2015. The two holes you are using for the VR5 and VR6 are to be used only if a trimmer resistor is used. Help Support GroupDIY Audio Forum 1; 2; Next. Jun 11, 2010 Location. Since there have been quite a few versions of the Green Pre. LDM-) they're based oncopied from those, or in fact have been the previous brandname for these new types. I made a box like this. What is the criteria for choosing the correct coupling cap in a circuit. i really like my D-EF47 with the BV8 classic series. So it doesn&39;t seem to hard to build a server and flash the image to an ssd drive. Not inclued in the Mouser Bom are 18pf Styroflex630V. EIN -122 dbm. The power supply pcb is also designed to fit into the stock HT-11A PSU enclosure and utilize many of the stock components including the power transformer, IEC, switches, and jacks. Get and idea for how handy they can be with your tube mic builds, external psus. All should be contained in this first post - which is re-edited regularily. Windows only. I Bought a ster. b) increase the left channel input gain. EQP-1S5 500 series Pultec EQP-1AEQP-1A3 Faithful reproduction of the 1970's solid state Pultec EQP-1A3 NOW AVAILABLE SECOND UNIT SHIPS FREE (to make up for USPS ever increasing rates) VPR-certified complete units handmade in the USA or DIY kits Complete units are. Jul 31, 2014. The more you change the capsule angle, the more unsymmetrical is the resulting waveform. Jan 2, 2021. BuySellTrade personal items. mattenylander Active member. This pcb kit designed by Matador is a faithful reproduction of the vintage AKG C12 microphone. EIN -122 dbm. The Neumann engineers are pretty bright and knowledgeable people who know what they're doing. on the front panel, As there is not so. Next Last. The tabs of the plastic spring connector need to be widened for the board to fit inside them. I think red. The input impedance is only 680 kOhm but its a "well known fact" that the minimum input impedance for a piezo pickup should be 1 Mohm to avoid loss of bass response, which is even more important for a double bass than a guitar. Windows only. ORG MNATS's 1176 PAGE - one of the best webpages covering this project - there even is an alternative PCB board layout MNATS's 1176 PAGE And NRG-Recording, Germany, also. Apr 1, 2021 1. You put it on the threads to prevent screws from working themselves loose. Any suggestions on how to bring it back to life. 001 inch gap (before bias), runs 200V bias. If you want to learn more about the classic Urei opto-compressors, just search this forum for the SA-3a, LA-Z-3A, Bloo LA-2a, or anything. So these are the final Version , the square version (44mm 48mm) should fit the gt-2b style , and the round version is 60mm diameter should fit upcoming riggler mic body i have been able to fit 2 mounting hole as per riggler drawing of 5. As you may already know Oliver passed away but I decided to go ahead and finish it in his memory. C11 passes audio to the sidechain, if left 0. The arc-over voltage is 450V in dry air, lower in damp. This is the build thread for a hybrid ELA M251-style tube condenser microphone design. I had the factory schematic (downloaded from a previous reading of your thread about the C800) ans I confirm that there are 2 (relatively) small super caps inside the mic, 2 bigger ones (1 farad) in the psu, plus the big dual cap in the psu. Aug 19, 2009. Latest lauritz. Twice the recording time for the same tape. A nice tube but the 6S6B seems better. Nov 26, 2010 Collective Cases - PSU cases, ez1073, CLX cases and PCB&39;s. This is my Control Amp schematic re-drawn from the original. I read in another thread here that the MPSA18 (rotated 180 degrees) is pretty suitable replacement for the BC184. on the front panel, As there is not so. Specially the Point to Point HZ bridge, half PCbhalf PTP for Optimal. But it started squirting air instead of cheese and ran out of pressure, with more than half the cheese still. Jan 3, 2018. I used a 1Gohm resistor and I was able to measure the voltage on the capsule. So a k87 is basically a k67 but with isolated backplates (and I need. So if you&39;re reading this now, please update your bookmarksfavoritesetc to point to www. Put simply 36pF4pF9. PLEASE CONTACT ME THROUGH EMAIL FOR PURCHASING, NOT PM&39;S If you don&39;t see a project you are interested in chances are I am working on it now or would be. Hello, everyone, For my v76m project which I'm slowly navigating through the information, I am thinking about the possibility of incorporating a tube compressor after the first gain stage. If you can swing a full -12V output, it is current-source. The WE640 condenser mike has a 0. People that are not familiar with Live Sound may not see a use for this, but let me tell you In Live sound normally all the inputs are Mic Preamp Inputs with XLR connector. Find schematics, layouts, PCBs, and tips for projects like G9 micpre, G1176 compressor, G7 tube microphone, and more. or Tektronix. You have to toggle it in and out to hear what the differences are pre-post. Where the 3 wires (17,-17 and AGND) all come off the board, where it goes out AND where it comes in from the other board, the wires need to be close together. Your advertising helps support GroupDIY. The critical voltage (where increasing field strength slams the diaphragm into the backplate) is 405 volts. Previous to the BA-1, RCA ran feedback loops in power amps, the OP-6 remote amp, and some other higher gain voltage and program amps. If you can only swing -7V, it is R1 type. NOS Freed Push Pull Output Transformer 8k600 Ohm RCA BA6A Compressor 15Hz-20khz eBay. Live consoles with some Line inputs exist but are exceptions and not the norm. Jun 8, 2004 Microphone Meta This is a meta-thread, made to allow members to keep track of the posts concerning this single issue - I will continue re-editing this first post. mattenylander Active member. I&39;ve seached high and low on the net for a definitite, specific approach to modifying the Federal AM864U to vary attack and release times. 5K split. I don&39;t have much experience with schematics so I&39;m a bit stuck on a few details. META - Microphone Preamplifiers. I had the factory schematic (downloaded from a previous reading of your thread about the C800) ans I confirm that there are 2 (relatively) small super caps inside the mic, 2 bigger ones (1 farad) in the psu, plus the big dual cap in the psu. It is available as a separate item for customers who already have the basic C12 parts kit but wish to build the ELA configuration. The signal preamp expands on a mic pre design by Samuel Groner. I repair studio and musical equipment in Dallas Texas and build the occasional piece of studio gear. So I remembered that I'd ordered 3 2520 DOA kits back when I got the 553F kit months ago. Latest Brian Roth. i thought I would start a thread specifically for this card, as it's referred to as parts of other projects - mylesgm, JLMaudio and sodderboy have posted related threads, but will focus here on working specifically with elements and applications. This means there will be no stop-pins or stickers shipped or required. The modules require -15V and -24V. If you can swing a full -12V output, it is current-source. includes every single part and component, NOS input and output transformer, and the front panel in either silver or black. You are using a normal resistors for the VR5 and VR6, so you should use the two holes right next to the ones you are using on your photo. Electronic parts kits 80 ea. I have a dead memory battery in a Tascam Midiizer MTS-1000, SMPTE MTC Tape Multi Syncronizer controller, it&39;s a NiCd (Nicad) Sanyo Cadnica N-SB3 3. This calculator allows you to compute and tune loadline and operating point of tube amplifiers power stages. Sep 4, 2012 Fits also Alctron Gt-2b style. In contrast to most components geared at the audio buff, these are invariably cheaper than the industry-standard FC caps - as much as 50 in some cases. But the producer is mandating lavalier mics for the comfort of the speakers, who have no recording experience and will surely feel more comfortable without big. This is the build thread for a hybrid ELA M251-style tube condenser microphone design. I scribe the outline using a home made stencil, use a step bit to drill out a hole to the edges of the outline, and a hand nibbler to cut out the rest, staying just shy of the outline, then clean up with a file. Joined Jan 9, 2010 Messages 1,132. - 1 db 30-30K. Hi GroupdiY, Lately i was working with Oliver with his consent To make a little PCB kit to Build his version of the U47 with EF800 tube. I just spent one hour comparing the schematic of the V6721, of which the manual can be found in attachement below, to my V6722 preamps. Visit our website. . wife first time swinging