1969 Fender Princeton Silverface
From Fender With Love
This 1969 Fender Princeton Silverface came into the shop with a few different issues. A new 3 wire line cord was installed backwards at some point and the ground pin had broken off. Also a new can cap had been installed and wired incorrectly. Both of these issues were potentially dangerous. All the other electrolytic caps in the amp were originals and failing.
A new line cord was installed and wired correctly with the hot lead going to the switch and fuse. The amp was then re-capped including the replacement “can” capacitor. New bias resistors were installed.
Tested amp’s biasing and found the 6V6 power tubes to emitting around 12.5 W. This is slightly over the rated max of 12 Watts so two 100 ohm resistors were added from cathode to ground on the power tubes. This brought the bias down to about 10.5 W.
Number of Channels: Single channel
Total Power: 20W (5W setting)
Speaker Size: 1 x 10" Celestion V-type Speaker
Preamp Tubes: 3 x 12AX7
Power Tubes: 2 x EL34
EQ: 3-band EQ
Inputs: 2 x 1/4" (high, low)
Outputs: 1 x 1/4" (16 ohm internal), 2 x 1/4" (single 8 ohm or 2 x 16 ohm), 2 x /14" (single 4 ohm or 2 x 8 ohm), 1 x 1/4" (DI out)
Effects Loop: Yes
Power Source: Standard IEC AC cable
Weight: 32 lbs.