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  1. Hey, this is better than Facebook memories......

    Hey, this is better than Facebook memories...
    Haha!
  2. Ok, I'm going to laugh uncontrollably in 3......

    Ok, I'm going to laugh uncontrollably in 3... 2... 1... No, I just can't. I've told myself and others that there is no such thing as a stupid question, and it would be unethical for me to laugh...
  3. My KB100 is roughly the same vintage and it has a...

    My KB100 is roughly the same vintage and it has a piezo horn (~3"X6") mounted to the grill. Are your grills intact? Although there are no resistors, it's not shrill at all. Mine came from the...
  4. The new stuff is called DeOxit Gold so the OP was...

    The new stuff is called DeOxit Gold so the OP was sorta correct. If the sockets/pins are cruddy, I use a non-residue contact cleaner first, then treat the tube pins with the DeOxit Gold. I'm afraid...
  5. I only use Caig's ProGold on tube pins. DeOxit...

    I only use Caig's ProGold on tube pins. DeOxit isn't rated for the heat...
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    Since your left hand is closer to your heart,...

    Since your left hand is closer to your heart, that's the one you put away... the "Left Hand Rule".
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    I have one of these: 23472 It's Craftsman's...

    I have one of these:

    23472

    It's Craftsman's version of the Black Beauty. It has no problem at all with chassis work. Before I found it at a flea market I was using the torch accessory for...
  8. Here's the backside of a '62 I worked on some...

    Here's the backside of a '62 I worked on some years back. Amp work only; he just wanted it running right. 23471 Sidenote: a couple years later and he starts a new band and now I'm playing bass with...
  9. I know there's a requirement in the National...

    I know there's a requirement in the National Electric Code that says something to the effect that capacitors are required to have a means of discharging the voltage to a safe level (below 60 volts)...
  10. If you don't know proper procedures for taking...

    If you don't know proper procedures for taking voltage measurements, find someone who does. Otherwise, shut the room lights off and look at your output tubes as it starts to hum. If they're starting...
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    "And do not allow the wire (component lead) to...

    "And do not allow the wire (component lead) to move until the joint has set."

    I was taught to make a good mechanical connection before soldering, which keeps the connection from moving while...
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    Replace all the caps, and it'll sound as good as...

    Replace all the caps, and it'll sound as good as (or better than) new. There's not that many, and you'll be glad you did. Just be careful with that ancient circuit board; if you leave the heat on it...
  13. Just to clarify: the round prong on the plug is...

    Just to clarify: the round prong on the plug is ground, not neutral.
  14. FWIW, I replaced the OPT in my '76 Pro Reverb...

    FWIW, I replaced the OPT in my '76 Pro Reverb with a Pro Sonic OPT which was a bit bigger and more versatile (4-8-16Z). Much better bass response.
  15. I did that (closer to 520v) with a Xicon for...

    I did that (closer to 520v) with a Xicon for almost a year; it didn't explode. YMMV ;o)

    I'll add that it was not in a customer's amp...
  16. He did say "IMHO", and we all know what his...

    He did say "IMHO", and we all know what his "humble" opinions mean...
  17. I guess my question is why do some Marshalls have...

    I guess my question is why do some Marshalls have grid resistors on only two of the four power tubes?

    (Oh, and the schematic is hard to read; they're 5.6K, not 56K, and no, there isn't 4 on each...
  18. '74 Mk II Super Bass: grid resistors

    This amp is running 4X6550. After the bias splitters (150K; schem shows 82K), the wires go directly to pins 5 of the two middle tubes and then through a 1K5 to either outer tube. The schematic shows...
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    And you'll probably pay 2 or 3 times what that...

    And you'll probably pay 2 or 3 times what that amp is worth for them to do it.

    Stacked? I'd be really surprised if it has dual secondary windings.

    Valvehead, have you tried marshallparts.com?...
  20. I hope you're not blocking too much airflow when...

    I hope you're not blocking too much airflow when you lean it against something. Oddly enough, fret buzz is not nearly as noticeable when you're plugged in & cranked up, compared to unplugged.
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    "And what the heck is "GORP?" Mindless drivel,...

    "And what the heck is "GORP?"

    Mindless drivel, judging by context...
  22. Welcome! Steve Connor is in Glascow. Maybe...

    Welcome!

    Steve Connor is in Glascow. Maybe shoot him a PM, but update the group on the amp...
  23. It does sound like a light voice coil rub:...

    It does sound like a light voice coil rub: fuzzy-sounding distortion that is noticeable at low volumes, but seems to disappear at higher volumes. Have you ruled out the speakers? Plug the amp into...
  24. Change the cathode cap on the 6BM8s. I ended up...

    Change the cathode cap on the 6BM8s. I ended up changing all the caps in mine, plus quite a few resistors, as well. Works great now. Those old Japanese oil caps don't fare so well after 45 years or...
  25. "Tubes are showing ~55mA each, tubes are...

    "Tubes are showing ~55mA each, tubes are matched."

    What is the plate voltage (pin 3-output tubes)?

    Bias voltage (pin 5-output tubes)?

    "Any suggestions for a bias mod? "

    Jazz mentioned a...
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    I'm glad you're up & running, and again apologize...

    I'm glad you're up & running, and again apologize for being a snit.

    The one I had here was a customer's, and yes 50W is quite loud. Hell, I have a 5W build (Marshally-Champ type thing) that has no...
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    To some it sounds better, and of course, your...

    To some it sounds better, and of course, your mileage may vary. Not wired like Matchless (which is Post Phase Inverter Master Volume, but with one pot), but like Marshall; pre phase inverter. The...
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    "I swapped the wires around several different...

    "I swapped the wires around several different ways until it stopped tripping the breaker."

    ??? I think you might need to procure a clue...

    "Everything is as it should be but I keep tripping...
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