Jul 20, 2011 · EF86 with morph control in PP gigging amp (finished) « on: June 22, 2011, 10:52:51 am » So much did I enjoy the EF86/morph control in the SE amp that I built a couple of months back, that I thought I'd take the same concept into more powerful gigging amp.

Apr 20, 2011 · Try your EF86 then. You'll have a little less than half the gain, but that should be adequate with your sources. With an appropriate operating point, the EF 86 will have at least double the output impedance, so you should calculate the …

Jun 2, 2019 · The EF86 sounds quite good, but in triode is still giving me roughly 25db (i've also read 30db) of gain. Would something like a 12B4a be a good choice here? Any thoughts or suggestions are welcome.

Jun 22, 2011 · So much did I enjoy the EF86/morph control in the SE amp that I built a couple of months back, that I thought I'd take the same concept into more powerful gigging amp. Finished the (Ef86 concept) version of this amp tonight.

Dec 3, 2005 · I started out looking to build a simple 15W triode / 30W Class AB1 pentode PP amplifer. I seem to have found mostly EL34 ckts and am confused as to which I should use. 1. Dynaco with the 7199. 2. Tadaki with the 6SL6 and 6SN7. 3. …

Mar 23, 2006 · Have a look at the tables on pp. 2&3 in the EF86 datasheet for component values at different supply voltages etc. There's even a table for using EF86 in triode mode which is quite interesting to try. Have fun

Jan 25, 2021 · If microphonics is a concern (and it isn’t unusual for small signal pentodes), then designing EF86 preamp stages with lower gain (e.g for a gain of 100 instead of 200), can reduce susceptibility to microphonics, and in this way you can more easily use EF86s in conjunction with other preamp tubes (as in the Clubman) to get unique preamp designs.

Feb 5, 2011 · EF86 with morph control in PP gigging amp Building a better world (one tube amp at a time) "I have never had to invoke a formula to fight oscillation in a guitar amp."-

Jan 13, 2018 · Then I re-designed and modified it into what you are wanting: EF86 > CF > EL84 while still using the tube 6X4 recto. It's a great sounding amp! I put a switch on the CF stage to bypass it when I want and that still has all the volume and more clean & bell-like chiminess.

Jul 5, 2020 · i think we have discussed on big diyaudio about 800 ohm Philips speakers and use of Philips Bombardon AD5201s speaker! i still didnt make anything from them but there is plenty of time remaining.