HAIRBALL The Silverface – FET/500 Rev. F – 1176 – Compressor

This is the 500 series version of the Silverface and it sound identical to the Revision F rack version Red Stripe.

This unit was offered in a black panel and a silver front panel similar to the Revision A but without a blue stripe. The major change to the revision F was the redesign of the output stage from class A to a 1109 style class AB “push/pull” output, utilizing a B11148 output transformer to provide more gain. Like the Rev A and D the input uses an O-12 transformer and the signal is attenuated at the input with a 600Ω T-pad. We believe the Revisions F is highly underrated and when given a 2:1 ratio becomes one of the more usable compressors we’ve heard. In many cases, original units are confused for Rev C/D/E’s with engineers mistakenly thinking of the revision F as a silver faced unit.

Clear anodized front panel made in Seattle, USA
PCB L-bracket made in Seattle, USA
Custom Ed Anderson O-12 reproduction input transformer made in the USA
Custom Ed Anderson 5002 reproduction output transformer made in the USA
Custom T-Pad input attenuator
Grayhill ratio rotary switch
BI260 potentiometers
Fully discrete audio path including capacitors selected by ear from Kemet, Nichicon, Panasonic, Vishay, United Chemi-Con and Elna
Bourns trimpots
1% metal film resistors
Matched FETs
Machined aluminium knobs

API (and compatible) Lunchbox and VPR500 racking systems.

Customers who order two units will receive stereo matched FETs and a link cable

Hairball FET/500 | RACK calibration

Fully built and calibrated to perfection in Canada with a 1 year warranty.

These can be also build to order.