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Rubber Tube Damping Ring For Antique Triodes, Pentodes, 30mm, Set of 6

 Rubber Tube Damping Rings, 30mm
 Rubber Tube Damping Rings, 30mmRubber Tube Damping Ring, 30mm
Price: $4.99
Item Number: RR30
Manufacturer: MC
30mm Inside Diameter Red Rubber Tube Damping Ring For Antique Triodes, Pentodes, Set of 6

Slips right onto the glass bulb of your 'antique' triode or pentode preamp tubes. Some of you who have been having trouble with microphonic tubes have asked us for a larger ring like this so here it is. I measured 30mm inside diameter, 40.17mm outside diameter.

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