Anyone know what the preamp tube layout is for these? I want to try and dial out some of the top end sizzle with the higher gain settings and would prefer not to do it using trial and error.
I can't imagine the 88's emphasizing the sizzle as much as the pre's would. I'll swap V2 & V3 around a bit and see if that does it. I do have some 6550's around too, so I may check that out as well.
Mybe you should read up alil about it on the search system for rig talk and yes sovtek kt88 add to the high ear piercing sounds it makes with them.. A good set of 6550 work great if they will be a high enough number to bias it to..I used Black Sable SED 6550 and sounds beautiful but what do I know lol..
Bumping old thread because I can't find the phase inverter.
I have a 20th Anniversary without reverb.
It has v1, 2, 3, 4, 5, 7
There is no v6.
So, is v7 the PI? My manual doesn't mention 7.
For tonal changes I use 1-2-3 mostly.
V6 is the Phase inverter.
V7 is reverb which you said yours doesnt have
The Shiva has 6 preamp tubes (7 in reverb model) which do the following: 1st (closest to input jack) > Ch 1+2 > check that one if your amp gets noisy or microphonic. 2nd+3rd > Ch2 only 4th > one part (triode) Ch 1, second part for the loop send (affects both channels) 5th > loop return (affects both channels) 6th (second row in center of chassis) > phase inverter (affects both channels) 7th (second row towards side of chassis) > reverb Note: If you want to experiment with different tubes the first 3 tubes are the most noticable sound wise.
(and Sovtek88 sucked compared to the GL-KT88s - totally made my 20thA go gangbusters - Sovteks were glaring and shrill, not the GenalexGL, they're bouncy, punchy, big and powerful - girth - and it takes the preamp distortion and really keeps it tight and focused...YMMV, but the GL-KT88 PTs with a select few 12AX7s and an LPS in the PI slot - been runnin' it like this since 2016?? Balls out)
I changed mine to EL34 (which takes a resistor clip) which improved the tone to my ears a lot. But it becomes more "classic" sounding with El34s, so might not be your thing. And as it needs to clip a resistor, I am not sure I should recommend. But another option....