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  1. Who sells 5mm (.196") steel polepieces?

    Hey guys, I know pretty much everyone builds pups with alnico pole pieces.. but I have a few old/cheap pickups that use a single ceramic magnet glued to some steel polepieces and I'd like to make...
  2. Can someone explain the phase inverter in the Traynor YBA-2 ?

    I recently fixed up a YBA-2 for myself and now trying to figure out the circuit, which is all very straight forward. But the phase inverter doesn't make sense to me... I've read that this amp is very...
  3. Hah! I found water based latex "contact cement"...

    Hah! I found water based latex "contact cement" that is light blue and dries clear. Roofing products up here in Canada are very different I think... since I'm not really attached to the speakers, I'm...
  4. Thanks J M, but should the youtube link be to...

    Thanks J M, but should the youtube link be to "Sweet Dreams" by the Eurythmics?? 1:34 to 2:07 shows them in a field with a cow and a cello.. not sure if that will help fix my speakers? :)
  5. I can't say I've seen latex glue available...

    I can't say I've seen latex glue available before, can you recommend any product names?

    I have some tolex glue that feels very latex-y, but I just checked and it's actually neoprene (with a water...
  6. Repair suggestions for "doped" guitar speaker surround

    Hey guys,
    I got an old Traynor 4x10 cabinet for cheap, sounded pretty spankin' good too but could definitely tell a few speakers had some tiny tears. After taking off the 60 screws on the back of...
  7. Has anyone ordered PING tuners directly?

    Hey everyone,
    I'm looking at using PING tuners in a design where I would need a decent quantity of them (say 50 sets of tuners at a time). Has anyone ever dealt with them directly and successfully...
  8. So the humbucking design is for audio frequency...

    So the humbucking design is for audio frequency stuff like 50/60Hz mains interference, etc.. and the cover is for high frequency stuff like radio transmissions?
  9. Why doesn't humbucker cover stop pickup from working?

    Hey guys,
    first post on the pickups forum - this is just a question that's been bugging me for a while, and I figured I'd ask some experts for the answer.

    Why doesn't a humbucker's shielding...
  10. Thanks Leo, Apex Jr still had a few in stock so I...

    Thanks Leo, Apex Jr still had a few in stock so I ordered one. I also hope to visit him on my trip to Los Angeles this summer.

    For others looking, Surplus Sales of Nebraska has this part for $33:...
  11. I was actually planning on visiting Apex on a...

    I was actually planning on visiting Apex on a trip to LA in June! I'll have to check them out.. is there any other places you recommend checking out?
  12. Source for 3-prong "Courtesy Plug" outlets? (pic attached)

    Does anyone have a source for the circular 3-prong "courtesy plug" outlets?

    This one is on a Traynor YGM-3 and measures about 1.5" from centre to centre on the mounting holes.

    53481

    I...
  13. Thanks for all the suggestions everyone.. I...

    Thanks for all the suggestions everyone..

    I did some tests showing that the problem was around the faders themselves. On a bad channel, I would get an output on an AUX if it was PRE-Fader, but no...
  14. Yamaha MG16/6FX Mixer - intermittent channels - service manual?

    Has anyone worked on this mixer (or similar) that has had a few intermittent channels? I'm hoping for a service manual or schematic.

    When I say intermittent, I mean that occasionally they work and...
  15. Where to find replacement Vol pot for Super Champ (DPST Switched)

    Hey guys,
    Where can I get a replacement volume pot (1M audio) w/ DPST pull switch.

    My friend's amp was brought to me with no reverb, but on inspection someone had replaced the volume pot and...
  16. Any way to add an isolation transformer inside PT-LESS old amplifier?

    Hey everyone,
    So I recently got my hands on an old amplifier believed to be from Sears - made in Canada. With a 35W4, 50C5 and 12AX7. I've made a few repairs and now have it working, but I'd like to...
  17. Thanks Mark! I see the LM13700 datasheet also...

    Thanks Mark! I see the LM13700 datasheet also shows a schematic for an "Automatic Gain Control" But I don't think it can be tweaked to ensure it works great with bass. I might breadboard it though...
  18. How to find an audio effects programmer?

    this might be a bit off-topic, but I'd like to hire a programmer to create some digital audio effects that I have in mind. at this point I don't have the time/patience/skills to do it myself but...
  19. Any Good Limiter Schematics? (no clipping)

    So I shot my mouth off a bit.. Let me explain.

    My bass player friend just got a new amp, but said he misses the Limiter that's built into his old Ampeg head (SVT-350H I believe). I said that it...
  20. Amp Techs - What are the useful tools that you've built?

    So repair guys and girls, what is the most useful tool that you've built?

    - I have an 8ohm 200W dummy load that has a 2x BNC tap for the scope that gets used often.
    - I also have a simple...
  21. I understand that either of those approaches are...

    I understand that either of those approaches are valid, but I'm questioning the trend of replacing 1W resistors with 5W resistors in an amp where no HT fuses exist (and aren't added). In that...
  22. 470 ohm screen-grid resistor power rating

    Hey guys,
    just a quick question. On the Fender amps that I've had the pleasure of looking at, a few of them have had the 470 ohm screen-grid resistors replaced with large 5W sand-cast resistors. Is...
  23. Thank you, fantastic! Next question: What's a...

    Thank you, fantastic! Next question: What's a regulator?
  24. Help me ID this old Gibson GA amp (and schematics request)

    The amp just says "GA-" and the rest of the model name has been rusted off. I've went through all the schematics from The Tube Amp Book CD and none match this configuration, which seems to have an...
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    Hi Scott, I use 26 GA shielded RG-174 coaxial...

    Hi Scott, I use 26 GA shielded RG-174 coaxial cable:

    https://www.jameco.com/z/RG174-U-100VP-RG-174-U-Coaxial-Cable-26-AWG-100-Feet_644818.html

    No problems with it so far, very nice braided...
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    Thanks, that's about the amount of wiggle I'm...

    Thanks, that's about the amount of wiggle I'm seeing with this - and I'm getting no rubbing. That being said, I've told my friend to replace the speaker completely - he gigs and tours a lot, and I...
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    Loose speaker magnet! Jenson C12K

    Never seen this before! Friend brought me his Deluxe Reverb Reissue with some hardcore rattling on certain notes. Turns out the speaker magnet itself is loose, it doesn't rotate but it wiggles from...
  28. It's news to me that opamps can become noisy like...

    It's news to me that opamps can become noisy like that. Intermittent crackly noise, but still functioning. Anyone know why that happens to them and what causes it?
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