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Collins 75A-4 / KWS-1 Original Used 4:1 Verner Reduction Drive Gear Set & 4:1 Reproduction Spinner Knob NEW

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MPN:
75A-4
Condition:
Used
Shipping:
$15.00 (Fixed Shipping Cost)
  • New aftermarket 4:1 Spinner Knob + original excellent Collins 4:1 vernier reduction drive with mounting screws. Fits 75A-4, 75A-2, 75A-3, 51J series & KWS-1. Ready-to-install upgrade.
  • New aftermarket 4:1 Spinner Knob + original excellent Collins 4:1 vernier reduction drive with mounting screws. Fits 75A-4, 75A-2, 75A-3, 51J series & KWS-1. Ready-to-install upgrade.
$234.99
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Description

Collins 75A-4 / KWS-1 Original Used 4:1 Verner Reduction Drive Gear Set & 4:1 Reproduction Spinner Knob NEW

New Aftermarket 4:1 Spinner Knob + Original Collins 4:1 Vernier Reduction Drive – Excellent Condition Complete ready-to-install package for Collins 75A-4, 75A-2, 75A-3, and 51J-series receivers, plus the KWS-1 transmitter. Includes:
  • Brand-new aftermarket 4:1 spinner (crank-style) knob
  • Original Collins 4:1 vernier gear-reduction drive in excellent used condition, complete with mounting screws
This is the desirable 4:1 reduction mechanism (Collins 307E-1 style) that provides smooth, low-backlash fine tuning—approximately 25 kHz per revolution—plus the spinner for rapid band-edge travel. Perfect upgrade for early direct-drive sets or as a replacement for worn later units. The original gear set is the scarce and valuable component; the new spinner matches it for immediate installation. Excellent mechanical condition with clean gears and included hardware. Ideal authentic Collins upgrade for collectors and restorers.
 
 
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