Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => EZ Board postings => Topic started by: Geezer on June 18, 2005, 06:07:51 am
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Hoffman Amplifiers
> Tube Amp Building - Tweaks - Repairs
> 5E3 heater wires @ low voltage
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roomnoise
Junior tube assistant
Posts: 2
(4/4/04 4:51 pm)
5E3 heater wires @ low voltage
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I just began testing my delux amp built from scratch and using a hoffman board. Nothing is working properly.
First issue is that the heater wires are reading around 3volts AC. Is this a PT problem?
I am using mercury magnetics Axiom transformers for both power and output. I have gone over the layout diagram a million times and everything is connected properly. The PT has a filimant center tap, which I star grounded. The latter is the only difference that I can find with my amp and the diargram (which uses the two resistors.) (note: I set up the amp in series with a 100 Watt bulb, as was suggested. Although the caps fully charged, the bulb never lit up i.e, a leak??)
HELP please.
zachsdad
Posts: 9
(4/4/04 7:17 pm)
low heater voltage
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What kind of voltages are you getting off of the HV windings and the Recty filiament windings
Les
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