I am selling my house and moving to a smaller place. Selling lots of guitars, amps and drums to deal with the smaller space. Here is an original appearing K2 ( does have long three prong cord added) There is a member with first dibs-but here is a quick and dirty demo from a zoom q3 I have done nothing except play this amp sinece I got it about 8 years ago-I am sure for those inclined it could use tubes and a cap job. Trem is iffy but i never really used it anyway.
I have more small tube amps that will be available shortly
Do you have a couple of spare 12AX7's anywhere? If so, maybe try swapping the two in the Zoo out. V4 oscillates the tremolo, and half of V1 recovers it. If there's something hinky with one of those AX7's, it might explain the unreliability of the tremolo. Course, it could just as easily be the caps or resistors in the trem circuit, but the tubes are a much easier variable to check.
Didn't listen to the vid (no time at the moment) but based on Hawkeye's comments - if the tremelo works a little at low speed and fades out at high speed, and doesn't have much depth, the problem 99% of the time is the 10uFd cap "C5". Replace that (Observe polarity) and all will be well.
If it doesn't work at ALL, then the problem is USUALLY the switch.
The tremelo will not work unless there are 12AX7's (no other 12 series tubes) in both positions. ---------- ---------- *************************************************** /Greg
Thanks for all the advice, It is a unit that is for sale. I am moving to a smaller place and have lots of small tube amps, guitars and drums for sale.
As an aside - I didnt realize the vid would get so many hits-sorry the playing isnt all that interesting-just trying to demo the sound and condition of amp
Last Edited by Goldbrick on Jul 04, 2013 2:21 PM
