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    That's the newer series. I don't have a schematic...

    That's the newer series. I don't have a schematic for that one. The MN3204 chip is the bbd delay, pin 3 is input. other than that these SMD boards are very hard to trace without a schematic.
    Check...
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    Here is the M-117 schematic. Which version...

    Here is the M-117 schematic. Which version schematic do you have?

    https://music-electronics-forum.com/attachment.php?attachmentid=55569&stc=1&d=1571150504
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    My meter, the Heathkit IM-104 is slow too, it's...

    My meter, the Heathkit IM-104 is slow too, it's still a mystery to me as to why. I think the main advantage with taut band meters is that there are no pivot bearings, so no friction. The reading is...
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    Here are a couple of nice folding meters. They...

    Here are a couple of nice folding meters. They sell for about $1000 each, a little over my budget.

    https://music-electronics-forum.com/attachment.php?attachmentid=55442&stc=1&d=1570458863
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    This is my Go-To meter. Bought it in the mid-70s,...

    This is my Go-To meter. Bought it in the mid-70s, use it daily. FET input, 50KHz bandwidth, taut-band meter. Best analog meter I've ever found.
    If I need a little more accuracy I have a Wavetek...
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    I used a Weller DS-100 for a long time. The base...

    I used a Weller DS-100 for a long time. The base unit has a solenoid air valve, it needs an external vacuum pump running continuously. Didn't work all that well so it sits on my junk shelf.
    I found...
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    As mentioned in post #4, sometimes JB Weld...

    As mentioned in post #4, sometimes JB Weld doesn't bond with the plastic. I've been using JB Plastic Bonder for a while now. It seems to be better but the jury is still out.
    Maybe giving the plastic...
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    I wouldn't worry about that. It plugs into the...

    I wouldn't worry about that. It plugs into the mico USB port. I suppose eventually the latest software will require newer hardware but you could keep using it as is with the old phone (or tablet)...
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    I have a Flir One which plugs into my Android...

    I have a Flir One which plugs into my Android phone. There is also an Apple version. It's been useful in repairs for finding hotspots though after a few years I don't think it's paid for itself yet....
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    There is an ABS glue found in the plumbing...

    There is an ABS glue found in the plumbing section of any hardware store. I've never used it for anything other than gluing ABS drain pipes together. Maybe worth a try.
    There is also a PVC glue for...
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    I use 2-part epoxy like JB Weld or a new one I'm...

    I use 2-part epoxy like JB Weld or a new one I'm trying JB Plastic Bonder https://www.jbweld.com/products/j-b-plastic-bonder-syringe I would not use any 5 minute epoxy.
    Sometimes I will use Krazy...
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    Does the tremolo sound any good? I can't believe...

    Does the tremolo sound any good? I can't believe that circuit would work very well. Why not drive a fender style Neon/LDR unit with the LFO. Connect the LDR from V2-Pin7 to ground. and free up that...
  13. Maybe that's a typo. The schematic not laid out...

    Maybe that's a typo. The schematic not laid out very well but if you follow the tip it goes to the battery connector +, switch goes to - . Tip is Positive
  14. I don't understand the question but maybe this...

    I don't understand the question but maybe this will help.

    https://music-electronics-forum.com/attachment.php?attachmentid=55211&stc=1&d=1568346508
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    Here is the Power Supply and Amps ...

    Here is the Power Supply and Amps

    ...
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    Sticky: Everything seems to be working perfectly....

    Everything seems to be working perfectly. Definitely one of the best software installation experiences I've had. Virtual XP still doesn't see the USB ports but I can easily connect through Linux and...
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    Sticky: Making progress. I managed to set up a shared...

    Making progress. I managed to set up a shared folder to transfer files. I had to download and install an add-on called "Guest Additions"
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    Sticky: Quick question. How do I transfer files between...

    Quick question. How do I transfer files between Linux and Virtual XP. They don't see each other. I thought I would use a USB flash drive but XP doesn't see it.
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    Sticky: Got VM and XP installed already. That was Easy! ...

    Got VM and XP installed already. That was Easy!
    Now to install my programs. Might take me a day or two, I'm busy with other things right now.
    Thanks for your help!
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    Sticky: Thanks, I'd never heard of Virtual Machine. I'm...

    Thanks, I'd never heard of Virtual Machine. I'm using Wine - some programs work, some don't
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    Sticky: For a single page PDF it's no problem, I click on...

    For a single page PDF it's no problem, I click on Print and select the option "Print to File" Also works for a web page and will create a multipage PDF.
    But what if I have a collection of image...
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    I use isopropyl alcohol Never had a problem....

    I use isopropyl alcohol Never had a problem. Years ago when I was using FreonTF It was excellent until one day I was working on a European radio, Telefunken I think.
    As you describe the plastic...
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    Sticky: I've been using Mint for a few years now but...

    I've been using Mint for a few years now but there are still a few things I did with XP that don't work as well in Linux. Maybe someone here has a solution

    1 A good PDF creator. I used Image2PDF...
  24. Thread: Washrburn

    by dmeek
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    According to the TDA2030A datasheet maximum power...

    According to the TDA2030A datasheet maximum power supply voltage is +/- 22V so the transformer is probably around 24VCT which would be +/- 18VDC
    The zener diodes are 15V so the raw DC would be at...
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    I have a scope with a small amp and speaker...

    I have a scope with a small amp and speaker connected to the Ch1 output. I often don't even look at the scope when I can hear what I need to know.
    As The Dude says you will need a capacitor like...
  26. Thread: Washrburn

    by dmeek
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    The main filter capacitors are rated at 25V so V+...

    The main filter capacitors are rated at 25V so V+ and V- will be a little less than that.
    V+ and V- on pins 8 and 4 of the 4558 IC should be 15V
    Here is the service manual:
    ...
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    The MJ11015 and MJ11016 are available in-stock at...

    The MJ11015 and MJ11016 are available in-stock at Digi-Key for cdn$11 each. Not cheap but not too bad.
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    I thought they might be darlingtons but with only...

    I thought they might be darlingtons but with only 3 diodes for biasing it didn't seem like it. Would be nice to have a datasheet.
    Looks like Semelab is incorporated into TT Electronics now. I...
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