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  1. Kanthal A1 Wire arrived, heater coil formed & wound

    This morning, after removing the old coil from the coil form, and spending the time to cut, scrape & file off the epoxy overspill from the coil form, I got it down to the bare surface. The Kanthal...
  2. I'm not sure I'd be switching the input side of...

    I'm not sure I'd be switching the input side of the circuits. Switching between the outputs of the two channels and the two EQ circuits alone seems the most sensible. Now, if it was an effects...
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    Wow........reading thru this thread and what...

    Wow........reading thru this thread and what Randall began with, and had to go thru with that knucklehead, I feel VERY grateful not yet having encountered any of those folks. I'm certainly in the...
  4. Nice find! I sent the RFQ......hope it was sent,...

    Nice find! I sent the RFQ......hope it was sent, as there wasn't the usual response one sees on a website after poking their Send button.

    I bought one of those inexpensive heat guns like you...
  5. I must have missed this listing yesterday while I...

    I must have missed this listing yesterday while I was at McMaster-Carr. I just ordered a 2ft length of stainless steel #2-56 threaded rod, OD of 0.086" for use as the winding core from them for...
  6. I've always admired the Steinel heat guns, as...

    I've always admired the Steinel heat guns, as well as the Leister products. I think it was The Dude who had come across a really inexpensive probe-like heat gun with a collection of nozzles for use...
  7. Starting over with this heater element, and with...

    Starting over with this heater element, and with the insides of the nozzle-housing that contains this heating element on the heat gun.

    I've identified the heater coil material.....Kanthal AF...
  8. I was only guessing as to what the tan-colored...

    I was only guessing as to what the tan-colored form is made from. It cracked cleanly in two up near the top, and, I just took a chance with the JB Weld Epoxy.

    The Fish Paper was a thought, though...
  9. Raychem VC 5300 Heat Gun, made in West Germany, 1970's-1980's

    I have two of these Raychem VC5300 Heat Guns, though Raychem was NOT the mfgr. These were made by somebody in West Germany back in the 70's & 80's....not sure when they were discontinued. 120VAC...
  10. I have had a number of the MOD 4EB2C1B & Mod...

    I have had a number of the MOD 4EB2C1B & Mod 4AB3C1B tanks feed back, mounted in the reverb pouches in the Hot Rod series, as well as Deluxe & Twin Reverb amps where NOT having that problem with the...
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    Replicating the effective circular mil area of...

    Replicating the effective circular mil area of 22AGW solid wire in a PCB trace, the width of that trace gets pretty wide, depending on the thickness of the copper on the board. From a chart I looked...
  12. While it sounds like you're dealing with an...

    While it sounds like you're dealing with an automatic resetting thermal switch, just where that part is placed within the amplifier / signal processing assembly of this speaker is another matter. ...
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    First, I would carefully de-solder the remaining...

    First, I would carefully de-solder the remaining solder terminals, then re-solder, using leaded solder, NOT lead-free. Pins 1, 6 & 8 are NOT used on the EL-84 tube. Granted, you've lost the...
  14. The LM2940T-12 and LM2990T-12 Low Dropout...

    The LM2940T-12 and LM2990T-12 Low Dropout 3-terminal voltage regulators arrived this afternoon, and I swapped out the LM7812T and LM7912T's with those, same pin-out. The Unregulated supply voltages...
  15. Throne Transducers

    Here's a photo Porter & Davies had sent me a while back of the two types they've used in their seats:

    54279

    I can't quite make out the P/N labels.....the one on the right is a current PD TT2,...
  16. Impedance Plot of Porter & Davies BC Gigster Drum Stool

    This morning, having remembered how to set up my cobbled Impedance Plotting System (using 10mA Constant Current Sine Wave source), and getting resistance calibration plots from my ESI Decade Box of 2...
  17. With egg on my face, NOT having looked at the...

    With egg on my face, NOT having looked at the input signal all this time, having seen the bipolar LM7812T/7912T IC regulators and their output voltages still at +/-12VDC at 110VAC, I didn't think to...
  18. I'm still waiting for the return of one of our...

    I'm still waiting for the return of one of our inventory P & D BC2's from a client...supposed to be sometime this week. I too am beginning to think I'll find this same behavior with another unit. ...
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    And, assuming the 100:1 Scope Probe doesn't have...

    And, assuming the 100:1 Scope Probe doesn't have a max of 500VDC rating as most cheap X100 probes do.....the good Tektronix X100 probes are good for 1500VDC (I still have P6009 probes, older style. ...
  20. My new 10,000uF/63V United Chemicon buss caps...

    My new 10,000uF/63V United Chemicon buss caps arrived, so I removed the existing caps from the PCB, found the snap-in leads on these new parts substantially shorter, so not much left to fold over on...
  21. As those were quite accessible, I replaced the...

    As those were quite accessible, I replaced the originals with some low ESR types, but, still the same issue. Good thought.

    Earlier, I moved the output ground connection from what seemed a higher...
  22. Today I've had a Porter & Davies Drum Stool...

    Today I've had a Porter & Davies Drum Stool connected to this BC2 amp, still driving it with the Roland TD-10W Kick Drum, which I had selected from a number of drum kit sounds, editing the kick for a...
  23. The Friday night 7.1 quake had me sitting in my...

    The Friday night 7.1 quake had me sitting in my drafting chair, feet propped up on a drum stool watching the Dodger Game on the tele. More intense than Thursday's quake, and lasted longer. Though,...
  24. Am I understanding you correctly.....the screen...

    Am I understanding you correctly.....the screen voltage is 12V below the grid voltage? I could believe that if you meant the plate voltage, but certainly NOT the grid voltage.
  25. Tempting Fate with July 4th Earthquake in Southern California

    I've only been living in Glendale, CA since April 2015, and haven't felt ANY earthquakes until yesterday morning. I was laying back in bed, semi-conscience until just after 10:30AM PST, when the...
  26. Today I've measured the existing filter caps,...

    Today I've measured the existing filter caps, 8700uF, with ESR a touch higher...170mOhm. I've ordered new United Chemicon parts that call their SMH series 10,000uF/63V part way lower ESR. I'll have...
  27. You're right. I even had some used 10,000uF 80V...

    You're right. I even had some used 10,000uF 80V 'pulls' from a Mackie SWA 1801 Powered Sub measure lower in the ESR, same method. As these are well glued into place, I was sort of avoiding the...
  28. Porter & Davies BC-2

    Porter & Davies BC-2
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