Guitar & Amp Components
Vactec Vactrol Resistive Opto Coupler
Neon Lamp - Light Source
(PVC) 21L329
Vactec Vactrol resistive opto coupler, neon lamp - light source. Photocell 80Ω (full bright) to 9MΩ (full dark). Used in Fender and Gibson amps. 3/8" x 1-1/8". Made in 1976.
NSN: 670-0028-000.

In the early 1960s, Gibson and Fender started using resistive opto-couplers to modulate the tremolo effect in guitar amplifiers. Both companies were assembling their opto-couplers (RO) from discrete lamps, photoresistors and coupling tubes. While Gibson used cheap but slow incandescent lamps as light sources, Fender replaced them with neon lamps. This Vactec RO uses a neon lamp as used by Fender in the late 60's. It increased the maximum frequency response and reduced controlling currents. At the same time, nonlinear modulation resulted which was desired by some as a sound effect.
$15 each - $13.75 (6+), $12 (25+)
5U4GB Vacuum Tube Dual Diode Rectifier
Phillips JAN 5U4GB full-wave vacuum tube dual diode rectifier. An ideal choice for all tube amplifiers. Medium shall, 5 pin octal. Ruggedized, higher quality control. Designed to higher standards, these U.S. Made JAN (Joint Army Navy) tubes have passed the most stringent of tests Uncle Sam could require from a manufacturer. The tube has a straight sided T-12 envelope and higher current ratings than the 5U4G. Used in a wide variety of amps like the Fender silverfaced Deluxe Reverb, Bassman tweed, Princeton Reverb, the B300, and many more. NOS (new in the box, old stock). Limited time special pricing!

"This is arguably the finest 5U4 available today. US made for our military’s radio equipment, likely of Rockwell Collins manufacture. Due to the large quantity of this premium 5U4GB now available we can offer a price from decades ago..." (Click to read more)

$15 each - $13.50 (10+), $10 (100+)
Tortran Vacuum Tube Amplifier Transformer
115V AC to 6.3/14.8/64/195/390V
(TP) TN741-M390-CPE
Tortran vacuum tube amplifier transformer. Center epoxy potted with 3/8" mount hole. Dual primaries 115v (230v in series) 50/60Hz, 740va. Five secondaries 390v C.T. at 1.5 amps, 195v at 0.5 amps, 14.8v at 2 amps, 6.3v at 3.6 amps, 64v at 0.1 amps. 6.1"DIA x 3"H, 14 lbs.
$95 each - $85 (5+)