Bee pre Output upgrade voltage test

[joralieu]

Just finished the output upgrade here are my voltage readings
45 6.9 VDC
60 7.3 VDC
46 214 VDC
51 214 VDC
Kreg 1.9 VDC
Kreg 1.9 VDC
Leds are all lit on the upgrade board but all out on the Bee quiet board.
Bee quiet upgrades have been working fine.

 

[Paul Birkeland]

Can you report on the IA, IB, OA, and OB voltages on the BeeQuiet high current C4S?

 

[joralieu]

Can you report on the IA, IB, OA, and OB voltages on the BeeQuiet high current C4S?

1A 214 VDC
1B 214 VDC
OA 2.7 VDC
OB 2.7 VDC

 

[Paul Birkeland]

Well, the good news is that the output upgrade is unlikely to be causing problems. The bad news is that the high current C4S board as part of the attenuator upgrade isn't working properly. It is quite unusual to see super low voltages on the output terminals. If you run the preamp for a few minutes, then turn it off, are the big heatsinks on that board warm?

It might be possible for this to happen if you have removed the 300B tubes for the second upgrade and you put them back in but didn't get the pins in the proper holes.

 

[joralieu]

Heat sinks stay cool. Tubes are in right.