ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

previous: Giacomo q{Remove the coupling cap (.047uf?)... -- 9/23/1999 8:37 PM

Re: Reverb on Normal Channel

9/23/1999 8:56 PM
Doc	Re: Reverb on Normal Channel The least amount of stray grid signal pickup will result by removing the wires and unused components. If you prefer to delete the wire, keep the .047uf cap on the board, then also be sure to remove the 220k resistor between the .047 and the other 220k resistor (which stays). If you only disconnect the wire, but leave the cap & resistor hanging there open ended and connected to a grid, you have the makings of a pretty good antenna, which means hum pickup and possible oscillation.

9/23/1999 8:56 PM

Doc

Re: Reverb on Normal Channel

The least amount of stray grid signal pickup will result by removing the wires and unused components. If you prefer to delete the wire, keep the .047uf cap on the board, then also be sure to remove the 220k resistor between the .047 and the other 220k resistor (which stays).

If you only disconnect the wire, but leave the cap & resistor hanging there open ended and connected to a grid, you have the makings of a pretty good antenna, which means hum pickup and possible oscillation.