Heys guys need some help with 50 watt build...tubes in V1 and V2 won't light up. Tubes test good. Voltage on pins 1 and 6 of V1 reads really high. Voltage on pins 1, 6 and 7 of V2 read really high. I have no reading at all at pins 3 and 8 of V1 or V2.
Everything on V3 checks out ok and the tube fires up. HELP!!!
Thanks
Kevrockitt
50 watt build problem no juice to V1 or V2 tubes
Moderator: VelvetGeorge
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Re: 50 watt build problem no juice to V1 or V2 tubes
What about you heater filament voltage on pins 5 and 9?
- neikeel
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Re: 50 watt build problem no juice to V1 or V2 tubes
Yes, your heater wires have a dry joint or broken wire between V3 and V2SteadyEddie wrote:What about you heater filament voltage on pins 5 and 9?
Neil
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Re: 50 watt build problem no juice to V1 or V2 tubes
I will check all heater wire connections. I have 3.15 AC voltage readings at 4/5 and 9 on all three pre tubes though. I will keep posting results.
Thanks
Kevrockitt
Thanks
Kevrockitt
- neikeel
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Re: 50 watt build problem no juice to V1 or V2 tubes
But you say your heaters do not light up, if you have ac volts the heaters should light up?kevrockitt wrote:I will check all heater wire connections. I have 3.15 AC voltage readings at 4/5 and 9 on all three pre tubes though. I will keep posting results.
Thanks
Kevrockitt
You will not get much voltage on pins 2 and 8 on V1 those are the cathodes
Pin 1 is the plate as is pin 6, so if V2 is reading high on the plates (1, 6 and 7) this suggests that your bus wire from the mid board filter cap or the second 10k dropper is open circuit.
Neil
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Re: 50 watt build problem no juice to V1 or V2 tubes
Headin' to the bench to check that now.
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Re: 50 watt build problem no juice to V1 or V2 tubes
OK...checked all bus wire....all good. So I replaced the heater wire run from V3 to V1.
Valves are firing! Everything is checking out fine now thanks to my fine friends on the Metro Forum.
Once again you guys come to the rescue!!!!
Thank you guys so very much!!!
Kevrockitt
Valves are firing! Everything is checking out fine now thanks to my fine friends on the Metro Forum.
Once again you guys come to the rescue!!!!
Thank you guys so very much!!!
Kevrockitt