Fryette Two Fifty Two Power Amp Retube Kits

The Fryette Two Fifty Two Power Amp. The kits we offer here are the most distinctive in tonal character, forged from many years of research. Every kit is configured to provide a specific sound/experience.

The bias pots are accessed from the top of the amp. We use bias probes to test and set the bias on these amps. You can bias one tube on one side and then one tube on the other side. All you need to check and adjust the bias is a bias probe and a Multimeter, or our all-in-one Eurotubes “Pro One” bias probe that reads both the plate current and the plate voltage simultaneously.

The default power tubes for all of our Fryette Two Fifty Two kits are the JJ E34L’s. Thru the years the JJ E34L’s with their added punch and articulation have become a favorite here at Eurotubes and with our customers. They are very tight with an extended low end over a standard EL34. However you can use the Power Tube drop down to select the JJ EL34’s, the JJ EL34II’s, the JJ KT77’s or the JJ 6CA7’s. The JJ EL34’s are known for their mid range bloom and have a slightly looser feel when compared to the E34L’s. The JJ EL34II’s are not as aggressive as the E34L, but they are a little fuller in the lows and low mids than the EL34’s. The JJ KT77’s have an extended frequency response with big/chunky lows (even deeper than the E34L’s) and chimey/present highs. The mids are very smooth for an EL34 type tube and when driven they’re extremely rich and complex. The JJ Big Bottle 6CA7’s have big lows (on par with the KT77’s), an emphasis in the lows mids, and very round/natural highs. This gives the tube a very thick and round character that’s as close to crossing a standard EL34 with a 6L6 as you can get.

The Standard Retube Kit is as close to OEM as possible. Maintaining the amps stock level of headroom and gain while providing a warm but even handed overall sound. The kit includes one matched quad of JJ E34L’s by default, two Matched and Balanced JJ ECC83S’s for the phase inverters (V1 – V3, replacing the 12AX7’s), and two Matched and Balanced JJ ECC82’s for V2 – V4 replacing the 12AU7’s.

The Gold Pin Retube Kit uses the JJ ECC83S Gold Pin variants to provide a smoother, creamier, and more singing overall sound. This option is less aggressive and has less “teeth” when driven hard. If you like a classic raunchy gritty overdriven tone, we recommend looking to the Standard or High Gain option. If sweet, open, and more refined is what you’re after this kit will do it. The kit includes one matched quad of JJ E34L’s by default, two Matched and Balanced Gold Pin JJ ECC83S’s for the phase inverters (V1 – V3, replacing the 12AX7’s), and two Matched and Balanced Gold Pin JJ ECC82’s for V2 – V4 replacing the 12AU7’s.