And it’s finished! The project was abandoned for a while but after digging in again for a couple of nights it’s done! It turned out a new power transformer was needed after all. I went for a Hammond 290AEX to do the job. The rest was more or less done with leftovers from the tiny-bits box and a small order to achieve completion at least.
A couple of details regarding the circuit: The values of the filter caps are: 30uf for the main filter cap, 22uf for the screen and the stock value of 16uf for the preamp. The cathode resistor value is 250Ohms, the stock value as well. The plate voltage is kept at a very descent low 330v thanks to the JJ 5y3 rectifier tube. V1 is a EH12AY7, V2 a JJECC83s and the speaker is a Jensen P12Q reissue.
I performed the fairly simple artificial center tap to the filament wiring to get rid of most of the 60hz idle hum. The instructions to this and many other useful modifications can be found here: https://robrobinette.com/5e3_Modifications.htm
The finished amp sounds very nice, has a pretty tight low end, yet has a open lively sound and the early breakup it’s well known for. Sound clips and/ or video’s will appear in the near future. Have a great weekend and till next time…
Check out the rest of this project: http://www.aldospadaro.com/project-building-a-5e3-tweed-deluxe/
Check out my other projects: http://www.aldospadaro.com/projecten/