Vactec Vactrol Resistive Opto Coupler

Vactec Vactrol Resistive Opto Coupler (PVC) 21L329

Vactec Vactrol Resistive Opto Coupler

Part Number:
(PVC) 21L329

Product Details:

Vactec Vactrol resistive opto coupler, neon lamp - light source. Photocell 80¦ (full bright) to 9M¦ (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.


Made in 1976
3/8" x 1-1/8"
Used in Fender and Gibson amps
Manufactured by
Vactec Vactrol
Alternate P/N:
670-0028-000

Share this page

$15.00 / Each
$13.75 / 6 Each
$12.00 / 25 Each

Qty

Ground Shipping Promotion on Orders over $100

Other Categories

Broadcast Component Parts

Guitar & Amp Components

Photo Cells / Photovoltaic Cells

Related Products

None

Syncor Military Battery Charger

Part #: PS PP-1659A/G

Description: This Battery Charger is in like NEW condition! Th…

Brand: Syncor Industries Corp.

Sold out
None

2500 ohm − 130w Wire Wound Resistor

Part #: RWF 18-104-2500

Description: 2500 ohm − 130w Milwaukee 18−104 Round Wire Resis…

$12.00 / Each

PUB Manual

HP 3406A Sampling Volt Meter Operating & Service Manual

Part #: PUB HP-3406A

Description: HP 3406A Sampling Volt Meter Operating & Service …

$31.00 / Each

PUB Manual

Fisher 100 FM Table Radio

Part #: PUB FIS-100

Description: Fisher 100 FM Table Radio

$16.00 / Each

Featured Products

Sample Metal Oxide, Carbon Film Resistor

15k ohm 0.1% 0.6w Resistor

Part #: RMF 00015000R0EY

Description: 15k ohm 0.1% 0.6w 500v Caddock MM177

$6.00 / Each

PC Mount, Multi-Turn Pot 100k Ohm / 10 Turn (RCV) RJR26HX104R

PC Mount, Multi-Turn Pot

Part #: RCV RJR26HX104R

Description: PC mount, miniature, multi-turn trimmer pot. 100k…

Brand: Techno

$1.50 / Each

None

12 Meg 60 Watt TRW Resistor

Part #: RMG MVZ-12M

Description: Ferrule terminations are typically cylindrical me…

Brand: TRW

$115.00 / Each

"SMC" Screw On (CRF) 50-010-0000

"SMC" Screw On

Part #: CRF 50-010-0000

Description: Sealectro clamp "SMC" sub-miniature bulkhead jack…

Brand: Sealectro

$8.00 / Each