tech talk

  1. P

    finding a new belt for yamaha mt2x 4 track

    hi there, I came across one of these in a music store for $15.. but it was diagnosed that it needs a new belt. I know this might not be all that's wrong with it but if that IS all that's wrong with it, I'd be willing to buy that and open it up, but my question is does anyone know where I...
  2. Garygo

    Digital piano headphone output signal is low and noisy when connected as line

    Hi all, Looking for some help here... I have a digital piano Yamaha YDP-163 which has 2 headphone jacks as audio outputs. Sadly, no AUX OUT or LINE OUT jacks so only headphones. When plugging a single pair of headphones to either of the headphone jacks, the audio signal is clean, clear and loud...
  3. A

    Amek Angela - LED meter problem

    Hi, The LED meters on my AmekAngela have this problem that it takes about a minute for the LEDs to shout down after the music stops,you can see it in this video: What could causing this problem?
  4. F

    FAB BV Style Transformers for Neumann U47, U47FET - Special Offer!

    FAB submitted a new resource: FAB BV Style Transformers for Neumann U47, U47FET - Special Offer! - FAB BV Style Transformers for Neumann U47, U47FET - Special Offer! Read more about this resource...
  5. kmetal

    Troubleshooting new setup

    Hey guys, instead of calling it bad luck, im calling it an opportunity to learn. I scooped one of those "beginner all in one" guitar / amp kits a couple days ago, where the whole thing is in a box, with picks ect ect. It's a first act brand and was $85 total. The guitar is surprisingly...
  6. pcrecord

    LDC Mic Shootout - ISA, T47, T12, C1 Mod, KSM32, KSM44

    Hi guys, Here is a new mic shoutout that includes 3 products from I had many questions about the mods and the DIY Kits. Hope you can hear the subtle differences. I'm still getting used to audio and video productions so your comments are needed and welcome. Btw, I'm not...
  7. Kevin Porter

    A&H GS3000 mpu problem

    I have a GS 3000 console turn of the century stuff. The Mute mpu board has gone out part 002-347-1 so all the mutes seem stuck off and mute and status leds are stuck on. No LCD. Everything else works. Need to find a replacement or figure out how to fix it. The pcb makes use of a P80C32 40 pin...
  8. D

    Studer A807 eprom dead

    Does any one have Bin likes for Studer A807 mk 1, current version installed was 40/87, but can change to later version if available. D
  9. Charles Turner

    Repairing a Shure 545?

    Greetings- I recently bought an older Shure 545 (4-pin Amphenol era) on eBay, and while it works, it sounds a bit of the dog with voice: a greatly diminished low end, and reminiscent of talking through a paper towel tube. Given there's only three parts to the mic: cartridge, transformed and...
  10. JakeAC5253

    Does This Switch Wiring Work For What I Want?

    I want to break a signal path which has no discrete components in it as of now. I want a 3 position toggle switch to have the options of Stock (signal pass through), Resistor 1 (signal path broken and routed into Resistor 1), and Resistor 2 (signal path broken and routed into Resistor 2). I've...
  11. J

    dbx 386 Power Transformer

    Hi there! I have a dbx 386 dual channel tube preamp. It was out of service for some time and when I recently put it back in the rack only a couple of LEDs turn on. On inspection it seems that the larger of the two transformers supplying power to the PCB has transformed into a Gandalf No-Pass...
  12. pcrecord

    Fixing UA La-610 Compressor (need schematics with voltage points)

    Hi guys, Like the title says, I got one of my two LA-610 who doesn't compress anymore.. the action faded over a few months. I tried to change the tubes and even exchanged the opto cell with the other LA-610 and it did no good. So I guess a cap or a resistor failed.. I'd need some guidance...
  13. achase4u

    Blocking phantom power?

    Edited for clarity. So, I am setting up for some hybrid mixing for the first time and have db25 connected from the analog out of my converters to the input of my radial lunchbox. The lunch box has preamps for recording as well as an eq. I accidentally sent phantom to the analog out of my...
  14. pcrecord

    T47 DIY mic kit from

    Well a few of you already know I was working on this project I'm gonna do a few more video on the product with more compare tests with other mics. Thanks for any comments or questions Build and presentation of the DIY T47 mic from - YouTube by pcrecord posted Jun 12, 2016...
  15. kmetal

    New 500 series kit from ssl

    just saw this on the SOS YouTube channel, from AES NY, happening this weekend. Looks really cool!
  16. DonnyThompson

    Adding a meter to a preamp

    @Boswell or any of our other resident electronics wizards.. I have this ADK AP1 mic pre that I love, but it lacks metering. There is nothing there to indicate what my input/output levels are. I'm wondering how easy it would be to attach a meter, even a simple VU, that could help me...
  17. kmetal

    Putting together a basic soldering kit

    hey all, I'm pretty new to this section of RO and at a beginner level as far as understanding of electronics. I've become progressively more interested in the creative sonic options there are available thru electronics modifications and repair. Anyway my goal is to within the first year to...
  18. achase4u

    500 series hum? How to track it down.

    Hey all - I have a Lindell 503 power chassis. I have been using a Phoenix DRS1R Preamp in the first slot for about 5 months now, no issues. I recently got an A designs P1 as well. All was fine, then after a couple days, I got allot of electrical hum happening, much above the noise floor of the...
  19. S

    60 cycle humm but only one power connection, I'm stumped

    Hi everyone, I'm not an audio engineer or even sure what one is but I have a problem with a humm. It happens when ever I have some audio device connected to the wall outlet. Let me explain further and see if one of you gurus sees how to fix it or at least track down the problem: I have a Sony...
  20. Kurt Foster

    Passive +4 to -10 and back?

    is it possible to change levels between -10 and +4 with transformers?