6aq5 tube amp9/23/2023 ![]() ![]() This is a negative feedback loop, and if you disconnect it, the amp will be a bit more raucous. If the amp is too-tame, find where C6 and R10 connect from the output transformer to the preamp tube pin 3 and R4 (1.2k). Now, play the amp as-is, and sort out any errors you made to this point. Looking at the back of the pot, with the lugs pointing up, the left lug gets grounded, the middle lug goes to pin 7, and the right lug connects to C3 where R5 did before. Replace it with a 1M audio pot (your new volume control). Find R5 (1M) between C3 and pin 7 of the preamp tube. You can add a grid stopper, if you want, from the non-grounded end of the 1M resistor to pin 2 of the preamp tube (now ECC83/12AX7).ģ. Plate and cathode resistor values are close-enough for now, so leave them until after you taste-test.Ģ. ![]() The Champ plan would be to swap an ECC83/12AX7 in place of the ECC82. The schematic shows a Volume control, then ECC82/12AU7 gain stage, then second ECC82/12AU7 gain stage, then 6AQ5.ġ. And, bad from a signal-to-noise standpoint. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |