Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: plexi50 on April 11, 2013, 12:30:06 pm

Title: Cap Voltage Question
Post by: plexi50 on April 11, 2013, 12:30:06 pm

The question of the decade!
Would there be any tonal change (dullness / muting) if lets say you used a 500VDC electrolytic cap on a 2.5VDC cathode voltage?

Title: Re: Cap Voltage Question
Post by: Willabe on April 11, 2013, 01:54:04 pm

With that drastic of a voltage difference than needed, I'm not sure there would be enough voltage for the caps dielectric to form?


           Brad     :think1:

Title: Re: Cap Voltage Question
Post by: plexi50 on April 11, 2013, 02:55:44 pm

The reason i am asking is because i have a Hi-Fi unit that is weak on the FM output even though all IF cans are adjusted perfectly. The AM side blows smoke is good and LOUD. One of the caps calls for a 33uf / 150VDC. There is a 47uf / 500VDC cap on one of the power supply nodes. I think my best bet is to start measuring plate voltages. But no schematic is available for this unit.