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  1. I WILL be posting images and a list of items on...

    I WILL be posting images and a list of items on MEF's Flea Market. I figured I'd start here first. One thing the years of collecting premium grade instrumentation was learning how each worked,...
  2. I don't know when I'll gain access to my shop at...

    I don't know when I'll gain access to my shop at CenterStaging, as that's where all my shipping supplies and industrial tape shooter is. But, having an abundance of gear that's not getting used, I'm...
  3. One thing the no load measurement tells me is the...

    One thing the no load measurement tells me is the amp IS working correctly in Bridge Mono mode. With no load, you don't have the copper losses that loose power under speaker-driven loads. You no...
  4. Force of habbit with me. Ground-referrences the...

    Force of habbit with me. Ground-referrences the scope to the amp. So, I too am confused with Stan's connections. With an independent floating DMM (battery pwr'd meter), this would work.
  5. Ah....of course. My mistake.

    Ah....of course. My mistake.
  6. Well, if Stan's output voltage has fallen to...

    Well, if Stan's output voltage has fallen to 113VAC at full power, when I had 120V at low current, we're causing voltage sag. Maybe Saturation is the wrong term here? (sorry about that)
  7. Well, within Glendale, if any of us were unable...

    Well, within Glendale, if any of us were unable to pay the rent, we wouldn't be evicted, but, we would have a 6 month grace period for each month rent isn't paid, and would have to pay it back. I...
  8. I just downloaded the Tek 2430A manual, and what...

    I just downloaded the Tek 2430A manual, and what I don't see is independent DMM connections. I'm lead to believe the DMM function is being made via the scope probe leads. I didn't read thru the...
  9. I think in this setup with the 5-Amp Variac, it's...

    I think in this setup with the 5-Amp Variac, it's core is saturating, since your amp at full power is pulling too much current thru it. What did you measure unloaded in Bridge Mode?
  10. Covid19 shutdown causing loss of lab/tool assets

    Being among the millions of financial victims from the Covid19 Virus shutdown of jobs & financial flow from servicing the entertainment industry’s gear, my two storage lockers are now about to be...
  11. I've never read the specs on their 2430A scope. ...

    I've never read the specs on their 2430A scope. The scope's vertical amplifiers have a BW of 100MHz, though I doubt if the RMS DMM in the system does. Should be in your Specs in your Owner's manual...
  12. Good find on the pair of 27k resistors. I've...

    Good find on the pair of 27k resistors. I've been down that road before. How important is it for the two power amps being equal? Mostly has to do with current each amp is contributing to the load....
  13. I'm locked out of my shop at this time (in...

    I'm locked out of my shop at this time (in California), though I do have my database here. I forget what the power amp supply voltages are.....above +/-70V, less than +/- 80V if memory serves. The...
  14. After I settled on that 604 ohm value, I had...

    After I settled on that 604 ohm value, I had ordered 50 pcs during a Mouser Parts Order, so I've had them on hand ever since. I think I re-ordered as I've put the mod into all of our rental Hot Rod...
  15. With only 2-wire 15VAC, you won't be able to...

    With only 2-wire 15VAC, you won't be able to create +/- supplies with a bridge. You can only produce half-wave rectifier based bipolar supply, as one lead will have to be ground. With the full-wave...
  16. Prior to changing V2 to a 12AY7, when I was...

    Prior to changing V2 to a 12AY7, when I was empirically adjusting the gain reduction on the two V2 cathode circuits, 600 ohms sounded closer than 560 ohms or 620 ohms. So, I had settled on 604 ohms....
  17. Nice article! I only scanned it briefly, but it...

    Nice article! I only scanned it briefly, but it shows all the key ingredients and points needed. And, it looks like the final rendition would be a winner. How are your breadboarding skills, as I...
  18. I'd be guessing you have more than one fractured...

    I'd be guessing you have more than one fractured solder joints on both the main PCB (which is a PITA to extract) and the Tube PCB. You'll need very bright light and magnification to see the radial...
  19. I haven't gone looking to see just what is on...

    I haven't gone looking to see just what is on ebay in way of inexpensive VU Meters. The 'real' VU meter, such as Weston, API, Altec, Honeywell, others are based on sitting in a 3600 ohm circuit, and...
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    Looking thru the revisions of SVT power amp and...

    Looking thru the revisions of SVT power amp and preamps schematics that g1 posted, I see the same output xfmr used, only one of the power amp has a different plate resistor on the power tubes (10...
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    What you may find while browsing the...

    What you may find while browsing the distributor's available replacement capacitors for this task, is the case size may be smaller. Scaling the Parts Layout drawing, you have a max case diameter of...
  22. This is the first report I've heard about a Hot...

    This is the first report I've heard about a Hot Rod Deluxe or Deville motorboating in the More Drive mode. Lack of foot switch wouldn't be cause. I'd have to go back to read your initial post(s) to...
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    You also have the two bass cabinet's present...

    You also have the two bass cabinet's present effective sensitivity in the equation. I'd also look at swapping cabinets/cables in the assessment to verify the relative sensitivity of each cabinet has...
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    From Juan Fahey's reply back in 2014: "...

    From Juan Fahey's reply back in 2014: " Interesting amp.

    Straight from the Lateral Mosfet era, I guess that later versions went Bipolar (or went all the way and adapted to Hexfets).

    What...
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    Line Voltage Select done with Fuse Holder

    The IEC Power Connector/Fuse module on your rear panel is of the type that also functions as the AC Mains Voltage Select. The AC Mains wiring on both your amp and mine are the same on that IEC/Fuse...
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    Nemesis NC320 Power Panel, 120V wiring

    I've opened up this NC320 Power Panel, after getting a couple outside shots. This one IS wired for 120VAC.

    57379 57380 57381 57382 57383 57384 57385 57386 57387
  27. Your hat's safe. There's more than one bridge,...

    Your hat's safe. There's more than one bridge, as well as a network analyzer.
  28. We were just dealing with you getting your +/-...

    We were just dealing with you getting your +/- 16V Power Supply stable, then dealing with your Channel Switching NOT working. There is a chart on the left side of the schematic under the heading...
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