Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: MakerDP on September 02, 2014, 02:08:10 pm

Title: Power Transformer for ReVibe build
Post by: MakerDP on September 02, 2014, 02:08:10 pm

I have the following power transformer sitting around waiting unused. I am wondering if you guys think it will be OK in a ReVibe...

230V @ 105mA (no center-tap) so I can expect around 325v after full-wave s.s. rect.
6v @ 4A
30V @ 20mA

I know the heater current and B+ current is OK, but what about the 230V output? I know the Mojo 779 is rated at 250V but no idea on the current.

Thanks,
DP

Title: Re: Power Transformer for ReVibe build
Post by: sluckey on September 02, 2014, 03:07:43 pm

Quote

I know the heater current and B+ current is OK, but what about the 230V output?

I think it's fine.

Title: Re: Power Transformer for ReVibe build
Post by: MakerDP on September 02, 2014, 03:13:36 pm

Quote from: drgonzonm on September 02, 2014, 03:00:24 pm

Which Revibe circuit were you planning to do? 

Get your self a list of power tubes and look for a pair that will be happy at 300 volts.    Not wrong with building a low wattage pp amp. 

I would also plan on using a choke in a pi configuration cap-choke-cap, to save your self some valuable B rail voltage. 

Good luck

You might be thinking of something else? The ReVibe is the standalone reverb/tremolo unit which has a single-ended reverb driver using a 6V6 or 6K6.


This is the latest version posted over on the project page... http://el34world.com/Hoffman/files/Hoffman_ReVibe.pdf (http://el34world.com/Hoffman/files/Hoffman_ReVibe.pdf)

Quote from: sluckey on September 02, 2014, 03:00:24 pm

I think it's fine.

Awesome thanks.