Hello to you all,
This is my first post here. I was reading all threads from this great forum for almost two years and I thought it might be time to show you my PP amp project. The inspiration came from the compactron ST35 build from Terry Smith. I love oddball tubes and sleepers and since I 've bought a box of about eighty Philips NOS 16GK6 tubes on the bay it was the logical thing to construct some nice amplifier around them. It is not a ST35 clone since I dont like the idea of running my tubes significantly above the recommended ratings (no offence, I realy like the Dynaco). Besides that I really do not need 17 watt stereo rms. I've used a very simple schematic for a 12AX7 as a driver in floating parafrase for phase splitting.
Oddball powertubes needs a oddball driver and therefore I bought a pair of 20EZ7 double triodes. Just a 12AX7 with a scrambled pinout and a 20 volts, 100mA filament.
The power transformer you see is an old Siemens transformer from professional equipment. It has four filament windings and some of them are centertapped. A 16 volts filament line was easy to come by. The 20EZ7's are getting DC to avoid 50hz hum problems. Outputtransformers are Hammond 1650F.
On the moment I'm still wiring and soldering. No music yet. But it will take just a couple of evenings.
Next project wil be a full compactron amp with 6AY11 (12AX7 plus two diodes) and 6JB5. The latter can be compared with a 6V6GT. You do not find Compactrons at a garage sale in The Netherlands (TV tech was very continent specific) but Ebay is a great help.
Updates will soon follow,
Regards,
Paul