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brucetassin 22nd June 2012 05:35 PM

RH-84 voltages
1 Attachment(s)
Hello all,

I'm in the testing phase of my RH-84 amp.
Here are the voltages I get. I would like to know what other builders
are getting...
B+ 304dc

6BQ5 plate +294.8dc +294.3dc
screen +296.2dc +294.4dc
cat +9.3dc +10.2dc

12AT7 plate +171.6dc +171.3dc
cat +1.2dc +1.2dc

brucetassin 22nd June 2012 08:06 PM

I forgot about current draw. I put an amp meter just to the left of where the
choke would be (i used a 250 ohm resistor) and get 98/99 ma.

Brisso57 23rd June 2012 09:49 AM

PCB for RH84?

I'm curious about the pcb in the photo. Did you make it yourself or are pcb's for the RH84 available?

I'd like to know because I have been gathering parts and will soon start to assemble my own RH84.

Doug (Brisbane, Australia)

brucetassin 23rd June 2012 02:25 PM

The PCB is my own creation.
This power amp is my 2nd PCB project. I built an RIAA pre-amp to listen to my
vinyl records and needed a power amp also.

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