Tube Amp Archive

I just tested both of my Pacific Transformers that were advertised at 7.5k
According to my measurements, they are both reading 6.4 K Primary impedance using Marstran.com method

Glenn K is a very good friend of mine I have listen to him play Orphan Annie for around 30 years. He called Ken and was able to have him build me an express . I should have never sold it .

Good luck I have 2 I would like to return

i had an original Express it had a pacific 6.6 k output. the Stancor's Ken used were 6.6k. Glenn K. measured his wreck transformer it was also 6.6K (the one with the Pacific) 6.6 k is the correct impedance. i have one of the 7.5 k transformers from Pacific it sounds like shit. looks like i will have...

when I get it I will measure the impedance to see what it is

I see pacific has changed back to 6.6 k from the 7.5 k incorrect impedance on the express output transformer

Please check out my friends new EP on Spotify
All guitars done with my Express clones
https://open.spotify.com/track/33a7PRzt ... SLxz6g8OFo

6.6 K is correct
Measured from an original Express that sounded as it should

very nice work!

Got my cnc setup to do turret boards

No sir I use star washers and I can get them tight enough to bite into the aluminum

There is a chance of dissimilar metal corrosion over time . You just need to keep an eye on it

Thanks for the kind comments on the build

Here you go

Here is a short video done with my iPhone 3rd build with Heyboer power and output trans. New TubeAmp Doctor / PS Vane EL34’s and JJ 803s 12AX7’s I think pretty close to the mark I compared to recording of my original Express I had in the early 90’s https://youtube.com/shorts/__tE0_6Lq-Y?feature=share

i just built another express with a 6.6k primary output. (heyboer) Pacific 7.5k sounds good but different then an express Now the amp sounds close to a real express Their power transformer also has to low a B+ I will install the correct power trans (heyboer) that should make the amp as close to an E...

very nice work!