June 28th, 2012, 06:52 PM
Since my 5e3 turned out so well, my wife wants me to build her a tweed princeton based amp.
I will be going off the original fender and the weber layouts as my starting point.
I really like the Classic Tone transformers that I got for my 5e3 and I really like the service I get from Triode Electronics.
The problem is they have a few different ones for the princeton. Which ones should I be looking at? I only need the PT for 120volts and the OT for 8ohms.
The searching I've done for 5f2a builds end up being Weber kits using Weber transformers.
June 28th, 2012, 06:56 PM
I think these are the ones you are looking for. I just recently finished up one of triode's 5e3 kits and it is awesome! good luck on the 5f2a project!
June 28th, 2012, 08:33 PM
If you live in an area like I do where the line voltage can reach 118-119 the advantage of the 40-18027 is the 550vHT vs. the 630vHT.
I have used the 40-18027 because without it the B+ will always be too high, by using the red/white leads instead of the red/red I get B+ much closer to spec.
It is a little more money, but again if you live in an area like mine it is the best solution for bringing the amp closer to specs.
IMHO, too high B+ ruins the character of the amp.
I'm a big fan of Classictone and Triode, not affiliated, just a fan.
June 28th, 2012, 08:45 PM
June 28th, 2012, 09:28 PM
THe weber OTs are actually quite good for the price. Its the PTs that are a bit iffy in 50Hz mains countries.
June 28th, 2012, 09:36 PM
I recently built a 5F2A with an Allen T08C OT as it offered 4 and 8 ohm impedence.
For PT I used Heyboer HY022772 which did not fit in the Weber chassis I ordered. I had to modify the chassis. Sounds great!
June 28th, 2012, 10:14 PM
Here's a PT I like for the 5F1, 5F2:
No center tap on the heaters. But if you use the 100ohm resistor twisted pair and connect them to your power tube cathode pin 8 (to overlay 17V DC voltage on the heater circuit) it makes a quieter amp than one with the heater center tap.