Dynaco PAS upgrade kits, 
PAS New Generation Preamp kits
 

Erhard Audio

Erhard Audio Dynaco PAS upgrade kits forum, click here
Why buy Erhard Audio tube stereo gear.....
Appointed North American distributor and reseller for all Lundahl Transformers
Appointed North American distributor and reseller for Audioamp Auto Bias Modules 
Erhard Audio - Custom, handcrafted vacuum tube audio gear
Designed and built for the discerning analog audio enthusiast