THREE VINTAGE CUNNINGHAM CX-301-A "RAINBOW" TUBES, NR!

THREE VINTAGE CUNNINGHAM CX-301-A "RAINBOW" TUBES, NR! (image 1/1)
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THREE VINTAGE CUNNINGHAM CX-301-A "RAINBOW" TUBES, NR! These three vintage Cunningham CX-301-A tubes are in excellent condition and feature "Rainbow" coloring on the glasses, making them a bit unusual. One has a lot more coloring than the other two. Tested on a vintage Hickok 532 tube tester, they tested 1100, 1000 and 950 for GM (mutual conductance). The average GM value for an 01A is 750, so they test above average, well above center on the English "GOOD" scale. Sold as-is since I have no control of them after shipping, but check my feedback if that is a concern (I have sold a lot of tubes recently with all happy buyers). Check out the other tubes listed this week. I will combine items to save on shipping. Shipping weight will be based on 1 lb. Will be sent by USPS Priority Mail insured in the US. Outside the US, will be sent USPS First Class International or Priority Mail International (if insured). I will figure exact shipping cost after the auction ends, then send an invoice. If you need an approximate cost please contact me and I will provide it. Please do not pay until I send an invoice . Winning bidders must contact me within 5 days of auction end, or item is subject to relisting, or it may be offered to the next highest bidder. Payment is due within 10 days of close of auction and PayPal is required. I reserve the right read more
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