1 steveo_4 3 years ago Howdy all, this is my first time back since the crash….anyway….I’m looking for some tech advice. I’ve been playing through my silvertone 1432 a lot lately, and swapping preamp tubes quite a bit. I’m thinking of trying a 12DW7 in place of the 12ax7. Going for a lower gain on one input, higher on the other, to a/b inputs. I was hoping someone with some tech chops could have a look at the schematic(link below), and let me know if that’ll hurt anything based on the circuitry. Also, because it’s a split-chassis amp, there is a phono plug that connects the preamp to the power section. Could I use that connection as an effects send/return and place a OD/echo/reverb pedal in between without negatively affecting the performance of the amp? Inquiring minds want to know….Schematic link: Thanks for the help!