I just picked this amp up in a trade and it's just about pristine. Everything works great except the phasor. Judging from everything I've read on here there should be a trimpot in the phasor circuit. The only trimmer I see on my board is the bias trimmer. Am I blind? I'll attach a pic. Btw my board number is the GP1 and the chassis number is 2100. Thanks.
Images:
Not Blind
According to the schematics GP-1 & 2 don't use trimpots on phasor circuit. GP3 & 3A do use trimpots.
http://pacair.com/mmamps3/sites/default/files/docs/2165-rp_and_2100-rp.pdf