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Recent content by KeithTr

  1. K

    Oscillation Explosion!

    I thought I had fixed a Technics SU-V5 with a blown channel, had it running for a few days and apparently it went into oscillation (I'm thinking high frequency) and blew up the RC network (10ohm, .047uf) components (a combined package) on both channels. Schematic of that section attached. Most...
  2. K

    Lifting solder pads - common issues. What temp gives the best chances of success?

    I'm just an amateur without the extensive experience of many others here but I've found that even if you are careful, sometimes a trace will lift and the best thing you can do is a repair that assumes the trace is gone, going to the next solder pad in the path or by uncovering some of the copper...
  3. K

    Best loudness contour in the business?

    Always liked the loudness control on the Nakamichi 410 preamp. You set the volume at the highest setting you would listen to and then use the loudness as a variable volume control to attenuate signal while boosting highs and lows. Slick and good sounding implementation.
  4. K

    Your favorite channels on YouTube for gear repairs and reviews

    Novalux Stereophonic XRayTonyB Ray Gianelli Mr. Carlsen's Lab (more old radio stuff than classic 2 channel, but some stereo and superb electronics explanations) Ah-Fix_It 12voltvids and while he hasn't posted in at least a couple of years (wish he would put some more up since his vids are better...
  5. K

    I think I found the ultimate indoor antenna

    Just got one of those myself. seems to work quite well, although my wife wasn't a huge fan when she saw it in my office.:rolleyes: So I moved it upstairs to the electronics lab:cool:
  6. K

    Technics News Class A Bias Issue

    Just thought I would update this crazy effort. Spent weeks on and off trying to check for something bad is the amplifier section of the non-working channel, with bad voltages on half a dozen transistors, even with outputs removed, which all tested good out of circuit. My schematic worksheet...
  7. K

    Today's JAZZ playlist

  8. K

    Luxman L-10 restoration thread

    I know this was posted a while ago, but if you decide you don't want to attempt the repair, DM me - I might be interested if you are thinking of selling. Thanks..Keith
  9. K

    What do you own that is TOTL?

    Nice to see you could shoehorn them in between the drill press and the workbench.:p
  10. K

    What do you own that is TOTL?

    Sanyo C55, P55, T55 - a brief period where Sanyo tried to challenge the top Japanese makers with superb specs and general build quality. All are solid, far above average, units and typically low profile with the C55 and T55 especially slim units. Technics ST-S8 tuner - match to the just below...
  11. K

    Bought a Mercedes today :)

    I had a 1989 E320 4WD that I bought used with 12k miles for 15k. Gave it to my son his 2nd year in college with 255,000 miles and a brand new set of tires. Figured it was big, safe, not worth anything to anyone else, and he'd probably destroy it anyway. Turned out he was too responsible to...
  12. K

    The BPC (Black Plastic Crap) Owner's Club

    While not BPC by any stretch, I still have the system I used that I bought or built in the 1970s (in the case of a Dynaco ST-150), including KLH Model 6 speakers, and all have been repaired, restored, and refinished and are still in use. While not my primary system any more, my wife or kids...
  13. K

    Is Alignment Necessary

    I'm trying to teach myself how to do this right now without buying a distortion analyzer. I borrowed a low distortion signal generator that does sweep and fm modulation (but not stereo multiplex) and if you have a digital scope that does FFT , you can apparently use that to estimate distortion...
  14. K

    The BPC (Black Plastic Crap) Owner's Club

    Don't know if these qualify, but Sanyo Plus series P55 (MOSFET output amp - dual mono, ,100w/ch, and able to be used as a mono amp at higher power), C55 (pre), and T55 (Tuner) are compact, very well build machines (the amp is slightly less service friendly, but not too bad). For a brief period...
  15. K

    Screws mismatch.

    I use the Ray Gianelli method of using a large baggie for each device and small baggies for parts, screws, etc. Each time I remove something, I put it in a bag and label it with a sharpie and then it goes into the master bag. If screws are involved I will label it something like "bottom...
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