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Collins 75A-4 & KWS-1, Solid Brass CNC Made, 4:1 Spinner / Vernier Tuning Knob Reproduction Painted Black Enamel #3

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MPN:
75A-4
Condition:
Used
Shipping:
$14.00 (Fixed Shipping Cost)
  • aftermarket solid brass 4:1 spinner knob for Collins 75A-4. Heavy ~16 oz weighted design with shiny enamel finish for smooth tuning feel. Reduction drive not included.
  • aftermarket solid brass 4:1 spinner knob for Collins 75A-4. Heavy ~16 oz weighted design with shiny enamel finish for smooth tuning feel. Reduction drive not included.
$169.99
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Description

Collins 75A-4 & KWS-1, Solid Brass CNC Made, 4:1 Spinner / Vernier Tuning Knob Reproduction Painted Black Enamel #1

  This one is used and in in excellent condition, with only a few small marks not noticable when installed.

 To my knowledge to date, no one is making them anymore.

  This one uses (2) slotted screwdriver Set Screws

This is a high-quality aftermarket (reproduction/custom) weighted spinner knob designed for the Collins 75A-4 receiver’s main tuning (kilocycles) control. It works with the optional or factory 4:1 gear-reduction drive (not included) that later 75A-4s used (or that can be retrofitted to earlier units). The heavy solid-brass construction (~16 oz / 1 lb) adds significant inertia/flywheel effect for a smooth, silky, weighted tuning feel that many operators prefer over the lighter original phenolic Daka-Ware-style knob.
 
It is finished in shiny enamel paint (common on these aftermarket pieces for a polished, durable appearance) and looks just like the original phenolic 4:1 factory knob. Multiple makers produced similar weighted CNC Made brass, weighted spinners over the years for the 75A-4 (and related gear such as the KWS-1, 51J series and 75A-2 & 3).
 
The original Collins 4:1 vernier assembly provided ~25 kHz per revolution for finer control, especially useful for SSB/CW. 
 
  The 4:1 drive unit is required for this knob (not included) however I have read that an extention can be made to use without a 4:1 gear set.
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