Search results

  1. 62vauxhall

    Fred's Toob amp(s) build.

    Well that's three out of four against so I'm out.
  2. 62vauxhall

    Fred's Toob amp(s) build.

    Tube equippment was becoming passe for mainstream gear when I first got into audio. Although it was still out there. I've only owned a few pieces of tube equippment since the late 1960's and never regretted their loss. Although I do still now have a small tube amp & tuner plus a receiver...
  3. 62vauxhall

    Fred's Toob amp(s) build.

    Did you listen long enough to develop an opnion on brand new tube amplification vs what you are uesd to?
  4. 62vauxhall

    Al K's Extreeeeeeeeeeeeeeeeeeeeeeeeeeeme Slope Crossovers!!!

    I think digital disc players get brain farts. There is an Akai CD player beside my computer desk that I hooked up a couple months ago. It had sat unused for about two years and it did the reverse of your Oppo. The time spent unplugged made it forget everything including how to open the...
  5. 62vauxhall

    PL400

    Newer than mine, #243 in March/73.
  6. 62vauxhall

    what are you listening to?

    Once upon a very long time ago, that title cut got played very, very loud.
  7. 62vauxhall

    A non-PL quasi-comp output transistor question

    Admittedly, Lee's suggestion sounded like potential for damage but I tried it. 0 The only access to clean these jacks is through the hole. QTips wouldn't fit, the wooden stick with the tip cut off was useless as was a strip of fine emery paper rolled lengthwise. A piece of that scratchy green...
  8. 62vauxhall

    A non-PL quasi-comp output transistor question

    So then....no Dremel?
  9. 62vauxhall

    A non-PL quasi-comp output transistor question

    I'm not familiar with that term. Looked it up and a number of different shapes. Does the carbide burr you refer to look like this?:
  10. 62vauxhall

    what are you listening to?

    The last Floyd LP that interested me. Until I discovered Obscured by Clouds in 2019.
  11. 62vauxhall

    A non-PL quasi-comp output transistor question

    Thanks for explaining. It seemed odd. And thanks again also for the guide through to finding the problem. All that's left now is an effective cleaning method for the insides of the RCA jacks. They're housed in a plastic. Going to try pipe cleaner bent triple, soaked in contact cleaning...
  12. 62vauxhall

    A non-PL quasi-comp output transistor question

    Hi Lee. Yeah, DC range. I played a full CD then an album side and measured again. With and without speakers connected. Once done fiddling with the adjustment pots, both channels were rising and falling a millivolt or two above and below 0. So I'm calling that adjustment done.
  13. 62vauxhall

    A non-PL quasi-comp output transistor question

    Before I moved to the sticks, I was able to borrow a VTVM but don’t have that option anymore. Can’t remember why exactly I did borrow it other than to make the same adjustment, whatever it was, to a couple of 8 track recorders. In this latest instance, the DMM’s display would not show a...
  14. 62vauxhall

    A non-PL quasi-comp output transistor question

    The new outputs are in and bias (no DBT) is now at 30mv as per service manual. There is another adjustment in the manual referred to as DC Balance Adjust but to perform that, according to instructions, a VTVM is needed. I do not have one of those. A DMM does not seem useful. I guess it’s...
  15. 62vauxhall

    A non-PL quasi-comp output transistor question

    So far, so good. Thanks a million Joe. Installed the old outputs two at a time in the left channel as directed. DBT dimmed after each pair inserted, bias is now adjustable and I can play a CD through a speaker. The right channel was OK a couple of months ago. Even if being over...
  16. 62vauxhall

    A non-PL quasi-comp output transistor question

    Many thanks Joe, I am actually beginning to imagine and end to this thing. Yes, an MJE15033 is at Q603. And KCS3503's are at Q605 & Q606. Voltages are within a few millivolts of 0 volts and protection is not engaging. It must wait until tomorrow but I'll do as you say re the outputs and...
  17. 62vauxhall

    A non-PL quasi-comp output transistor question

    I'd be more confident if Q605 was replaced, it's a 2SC1628. As is it's partner, Q606. I mentioned earlier on page 4 - post #80 (jeez this has run long), that I have KSC3503 which are supposed to sub for 2SC1628. Would you agree....put KSC3503's at Q505 & Q606? Re the outputs: All have been...
  18. 62vauxhall

    A non-PL quasi-comp output transistor question

    Reconnecting Q605's collector caused voltage to change from (+)51 volts to approximately (-)0.8 millivolts. And the amp did not go into protection.
  19. 62vauxhall

    A non-PL quasi-comp output transistor question

    R627 reconnected and voltage still positive and still at (+)52 volts.
  20. 62vauxhall

    A non-PL quasi-comp output transistor question

    The 2SA818 data sheet I looked at was INCHANGE Semiconductor and it does say B-C-E. Yet that position on the PC board is marked differently....E-B-C. That was why I crossed the B & C legs of MJE15033 which is B-C-E. Different pinout's from different makers of 2SA818 transistors? And...
Top