10 October 2023 - Been very busy but was able to get the 516F-2 power supply HV section recapped and the 2W 270K resistors replaced - power measured right at 800v with my Simpson 303 VTVM.
I installed the 516F-2 power supply in the speaker cabinet.
I also replaced the line cord and I ordered the KWM-2 recap kit.
17 August 2023 - The HV & LV capacitors arrived this week and I replaced the LV dual capacitor and getting about 404v DC on my DVM. Will replace the HV capacitors and resistors next.
13 August 2023 - Ordered the capacitors for the HV & LV lines - these should arrive this week. Also got a great deal on a KWM-2 - see the KWM-2 section - it should arrive this week also.
My Collins speaker and PS cabinet arrived a few weeks back.
11 August 2023 - This week I replaced the three bleeder resistors and still getting wrong voltages on the LV & HV sides - next step is to replace the capacitors and other resistors on those lines. Here's a as-is look before replacement of those components.
5 August 2023 - working on replacing the three bleeder resistors - waiting on some 6-32 threaded rod to mount one of them.
Here's the 516F-2 schematic.
26 July 2023 - The .05 capacitor was put in last week and that fixed the fuse blowing issue. The voltage is high on the LV side and measuring the LV out to ground measured 0 ohms which means the 24K bleeder resistor is bad - I ordered a 25K 25W resistor to replace it. Also ordered two additional ones to replace the HV bleeder resistors. Here's the connector drawing I made of the plug:
9 July 2023 - Received the other tube and testing the power supply - it is blowing the fuse but seems to be only on the HV side - ordered a .05uf capacitor to see if that fixes it.
7 July 2023 - This arrived - will get it on the bench soon. One tube arrived and the other should arrive soon.
3 July 2023 - A future project...
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