|Project by CiscoKid||posted 10-16-2012 12:36 PM||1304 views||3 times favorited||9 comments|
Here’s another tube amp I recently completed. 1952 Fender Deluxe circuit. This is the 5C3 Deluxe that used octal preamp tubes with grid leak bias. I believe this is the last time Fender used the grid leak bias first gain stage. Grid current leaks out through the input circuit causing a negative voltage to appear on the grid, thus biasing the tube. A capacitor and large value resistor (5 meg) are used to keep the negative voltage fairly stable. All Fender Deluxes after this model used 12AX( or Y)7 preamp tubes. Cabinet is ribbon mahogany (sapele) and ebony. Through dovetails. 12” Tone Tubby completes the picture. This amp breaks up early and at relatively low volumes making it ideal for a practice amp. 5 or 6 on the volume dial gets you Billy Gibbons tones (think Mescalero CD) and 9 or 10 on the dial gets you squarly into Neil Young Rush Never Sleeps territory. This is using guitar – cable – amp with no pedals.
-- Al, Culpeper VA