build a ST120 . The thinking was because I know little about electronics or sterio design .
And I never have built anything like this before !
I now know a little more than before but that is still little . I did a bunch of reading on this
fourum and others and alot of reviews to help with the build .
The kit is well thought out and comes with very good instructions and diagrams that
made it easy . So almost anyone could build this kit .
I decided to get the power supply upgrade caps with the kit. After reading a few good
reviews on coupling caps I decided to go with the Mundorf silver and oil caps of the factory specs , as
the coupling cap upgrade . And like another build on here , upgrade the resistors with
Tantalum resistors . I also did the diode mod for the rectifier socket and added a Ericson
GFCI plug to help with rectifier life , Since we have been having more short and long
power outages here the last couple years . And the reset on plug works perfect .
The build went pretty easy with only a couple mistakes that I cought after double , triple
and quadruple checking everything during the build . The circut board which I thought
would give me the most headaches turned out to be the easiest part !
I decided to go with the KT120 power tubes . And Mullard CV4024 outer tubes a
Telefunken 12AT7 center tube and a Mullard GZ33 rectifier . I also bought a couple
copper cap rectifiers just in case .
After finishing all the soldering , and pluging it in , the preamp tubes lit right up and after
plugging all the power tubes in they lit up perfect too and biased up the first time ! Much
to my suprise . It is perfectly quiet and sounds awesome . This is my first tube amp and
I’m hooked . And it does seem to sound better because I built it myself .
Here it is with some of the wireing complete . I used the 4 ohm taps for my old infinity kappa speakers I'm useing .
Pretty much complete.
Inital start up was with the weber copper cap rectifier just in case , I didn't want to blow up a expensive mullard !
if something wasn't right . The switch back to the Mullard did seem to knock down the power a bit .
It shure looks nice in the dark !