Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: p2pAmps on April 02, 2020, 08:05:50 am

Title: Another Hoffman PR Build
Post by: p2pAmps on April 02, 2020, 08:05:50 am

Hey Guys/Gals

If you are thinking of building a Hoffman PR I'm here to tell you to go for it.  They are fun projects and the bonus is at the end you have a GREAT amp, one of my favorites.  I build lots of these and you should too.

The one in this pic needs filament wires and an AC cord and she will be ready to fire up.

A few changes I do:  DR OT, .022, .022, .01 in the trem circuit as well as replace the 1M with a 220K.

tip for first timers: wire the board first which will save you much grief :)

Cheers
Mike
(https://images.squarespace-cdn.com/content/v1/56fbe87462cd94ff6ec9d02c/1585832695508-1NG56EDX99DGW1TJT5RJ/ke17ZwdGBToddI8pDm48kDHPSfPanjkWqhH6pl6g5ph7gQa3H78H3Y0txjaiv_0fDoOvxcdMmMKkDsyUqMSsMWxHk725yiiHCCLfrh8O1z4YTzHvnKhyp6Da-NYroOW3ZGjoBKy3azqku80C789l0mwONMR1ELp49Lyc52iWr5dNb1QJw9casjKdtTg1_-y4jz4ptJBmI9gQmbjSQnNGng/IMG_5566.jpeg?format=2500w)

Title: Re: Another Hoffman PR Build
Post by: mresistor on April 02, 2020, 08:53:57 am

Beautiful !

Title: Re: Another Hoffman PR Build
Post by: Latole on April 02, 2020, 08:56:38 am

Very nice job, congrat.

Title: Re: Another Hoffman PR Build
Post by: shooter on April 02, 2020, 09:09:39 am

You are the Gold standard!  glad you're still cranking them out  :occasion14:

Title: Re: Another Hoffman PR Build
Post by: p2pAmps on April 02, 2020, 11:07:27 am

Thanks fellas, and no gold standard here LOL, more like rusting iron!

Title: Re: Another Hoffman PR Build
Post by: shooter on April 02, 2020, 11:31:43 am

Quote

more like rusting iron

:laugh:
take up Alchemy  :icon_biggrin: