Sahbin wrote:Hi I am interested in building the carmen ghia but I live in europe => 220V, I have no idea what pt, ot (choke?) to use, can you explain how what I should look for when buying a transformer for an amp (I can order from mouser europe). Thanks
No choke in a Carmen Ghia.
A basic Fender Deluxe style OT or Marshall 18-watt OT works great...you looking for a 8,000 (8K) primary winding and then secondary should be whatever you want to match, I prefer a tapped secondary for multiple speaker load options.
Secondary voltage 550-580@120-150mA center-tapped
Rectifier heater current 5V@2A
Tube heaters 6.3V@2.5A
The Hammond 370EX (550v) looks like a potential candidate, a little low on the B+ but in the ballpark. Many people build these using the transformers for a Marshall 18-watter and substitute in a 6V rectifier like the EZ81.