🚀 go-pugleaf

Hi folks!

I'm glad to see a growing number of posts related with the above
subject.

So, I would like to make a few questions since I intend to project and
build a tube amp (only the last power stage).    To those who post (please...) you can talk in the
manner you want (very technical, very mathematical etc...) without
problem. Here they are:

1. What are the good materials to use in the output transformer core?
2. Is there any good supplier of these transformers (preferably in
Europe, if someone knows) ?
3. Where can I find suppliers of "good brand" tubes (I think I'll use
EL34 pentodes) again in Europe, preferably, (a good discussion on tubes quality
is going on the subject "Sovtek tubes")?
4. Is there any GOOD book,( the most "techcnical" you can find...) about
amplifiers with tubes, topologies, etc... around? I've some general
references in books on electronics from 50s and 60s (many years before
Horowitz and Hill "Art of Electronics" cookbook appeared *:-) ...) but
I couldn't find one "dedicated" to amplifiers?
5. Where can I find information about specialized topics related with
output transformers, such as, shielding, copper quality, winding
process, etc.


Thanks to all! Please reply. 

J. Augusto 
INESC, Lisboa, Portugal