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  1. Replies
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    Since the company has systems capable of work...

    Since the company has systems capable of work from home, it seems they might have an IT guy. Can you not contact THEIR IT people and ask assistance?
  2. These are common enough pots. These are not the...

    These are common enough pots. These are not the old Crate pots which were unique. I have altered them with no hassle. If the new pot shaft is too long, cut it off. If it needs a D-shaft, cut away...
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    It either runs at normal cassette speed, which I...

    It either runs at normal cassette speed, which I think is 1-7/8 ips. Or it runs at twice that. SOme models have a button to select hi or lo speed.

    The gear wheels have grooves or cams the...
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    You have mentioned pay, but pay isn't the issue. ...

    You have mentioned pay, but pay isn't the issue. We generally post up anything we have.

    The motor and transport operate at one speed. It could be the wrong speed, but whatever speed it decides...
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    That^^^ If I had a bunch of values, I'd put...

    That^^^

    If I had a bunch of values, I'd put the largest one first. But you are talking 16 versus 22, and that is such a tiny difference as to not matter.
  6. Thread: BJT buffer help

    by Enzo
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    125

    Your cap sits unterminated? The emitter voltage...

    Your cap sits unterminated? The emitter voltage wants to charge the cap, but without a ground reference on the other end, the cap cannot charge, meaning the voltage will be the same. That DC...
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    The 6vAC heater connectors are under spec and...

    The 6vAC heater connectors are under spec and burn up. SOlder the wires directly.

    I never encountered rectifier failure, the load on each supply is just 150ma for tube heaters. Add a few...
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    I just checked my dealer support site, and that...

    I just checked my dealer support site, and that half page is missing there too. I know my paper copy is intact, but it is not accessible.
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    That is weird, it didn't used to be. The layout...

    That is weird, it didn't used to be. The layout drawing is intact, we can draw out the circuit from that, there is not much on that board.
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    Calling sometimes works and sometimes not, but it...

    Calling sometimes works and sometimes not, but it is a step many neglect.

    4066 is a quad switch. Used to be the 4016 was what we used. 4066 is a common CMOS chip. it has four independent...
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    For future reference, try this file.

    For future reference, try this file.
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    Often such chip data sheets have sample circuits,...

    Often such chip data sheets have sample circuits, and many designers pretty much just lift the sample.

    Forget the internet, CALL Yamaha and ask if they can provide the file.
  13. And you can always get any Peavey schematics...

    And you can always get any Peavey schematics directly from Peavey customer service.
  14. Thread: Peavey 70420211

    by Enzo
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    And you cannot email parts orders to Peavey. You...

    And you cannot email parts orders to Peavey. You can email parts questions, but orders must be done by phone.
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    OK, how about apaply a signal, and when this...

    OK, how about apaply a signal, and when this happens, leave it that way. Use a signal tracer (listening amp) and see where the signal collapses. Hey, if you turn up the reverb, do you get...
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    Touching a probe to the circuit completes a...

    Touching a probe to the circuit completes a circuit with the impedance of your meter. It suggests to me perhaps and open grid return resistor. WHich plate? And by channel 2 we mean vibrato...
  17. I vote the chart went in when the front panel...

    I vote the chart went in when the front panel went in.

    I agree with the printing thing. It looks like a low rez scan or even a tracing. The lines have a crude hand drawn-ness about them. Or...
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    The difference between a zero ohm connection - a...

    The difference between a zero ohm connection - a dead short - and a half ohm connection - 0.47 ohms - is pretty much none.
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    Not quite. 100Hz is associated with power supply...

    Not quite. 100Hz is associated with power supply ripple, yes, but not always because the caps are not filtering. A ground wiring where the preamp stages share copper with power supply can cause hum...
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    I suspect your hum is 50Hz or 100Hz rather than...

    I suspect your hum is 50Hz or 100Hz rather than 60. But it is important to determine which.

    I see you used a Cliff type jack as input. Does it have a chassis connection at the jack?

    get your...
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    You increase R67 because it works. Decreasing...

    You increase R67 because it works. Decreasing R58 won't. R67 is only 470 ohms. The bias voltage is the result of the voltage divider the two resistors form. R58 is 47k. If I knock R58 all the...
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    As was said, -57 on the grids will be even...

    As was said, -57 on the grids will be even cooler. And so what is wrong with being a bit cool anyway?
  23. That's not how JFETs work. SOurce to drain will...

    That's not how JFETs work. SOurce to drain will be a lowish resistance, UNLESS you turn it off with a gate voltage. What resistance? I don't know, I usually expect something like 50-200 ohms. ...
  24. 50 or 60, equivalent in terms of what we are...

    50 or 60, equivalent in terms of what we are doing.

    OK lifting those caps clears my JFETs. So much for that. Thanks for checking them.
  25. I worry more about JFETs in the gate area. The...

    I worry more about JFETs in the gate area. The Source/drain path is a low resistance until turned off by the gate. But the gate can get leaky to the S-D path. And that can inject noise into the...
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    Difference in DC resistance of winding. Read...

    Difference in DC resistance of winding.

    Read the thing I posted about the Vactrols. They are equivalent. I don't know which numbers are which, but the document describes the diffrences in types....
  27. Thread: Peavey Bandit 112

    by Enzo
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    I am old, I have no schedule. I might sleep all...

    I am old, I have no schedule. I might sleep all afternoon. Tomorrow might be opposite.

    1.5 hours? So you are in that Labrador zone?
  28. Thread: Peavey Bandit 112

    by Enzo
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    228

    So monitor its control pins and see if they...

    So monitor its control pins and see if they toggle when you channel switch.
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