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udtman 29th July 2006 10:35 PM

recently bought via ebay a small tube amp that looks very close to a heathkit UA-1 schematic wise that is.
6BQ5 x 2
12AX7 x 1
6an8 x 1

However, there is absolutely no label as to who made this or a manufacturer
It is obviously a kit of some type
The only markings are on a piece of the assembled unit
PA92-9 also a number 283 seperated by the power cord

Power transformer has PA-227 and 798852 stamped on it
measured output was green pair: 162.7 volts
7.6 volts

Audio transformer has pa-228b, 138913, and 28536 stamped on it

I have looked thru every old transformer catalouge i can find and cant see either of them listed anywhere

If anyone can find out some info on the transformers like who made these things, i would appreciate it very much

Thank You


mario2005 29th July 2006 11:45 PM

You can upgrade your amp with parts from Audio Note :D

sorenj07 30th July 2006 04:25 AM

pics would be real nice.

udtman 30th July 2006 05:03 AM

Audio Note ? wth is that, theres like 30 of them on google
a little more info please

mario2005 30th July 2006 08:47 AM


udtman 30th July 2006 07:18 PM

Mario, these are beautiful transformers, but way over my head and totally outclasses anything i have or work on, the info is very much appreciated.
However, im just trying to find the specs for what i do have atm,which i fear will be impossible since all the info i have is allready posted here. i will TRY o post some pictures asap.

Thanks again, but im way out classed on this one.

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