This new old stock-testing McIntosh 6L6GC output tube was tested on our Maxi Matcher 2 for shorts, gas and transconductance and tested on our Jackson 648. There were no shorts or gas. Transconductance measured:
20.7 milliamps / 2250 micromhos (McIntosh 6L6GC remnants stenciled on glass)
Tube tested with 400 volts on the plates and a bias of -48 volts. New old stock US-made 6L6s typically test with plate current from the mid-teens to
mid 30s with transconductance from around 2200 micromhos.
Tube was also tested on our Jackson 648 at 111. Good range is from 70-130. This tubes tests at 111%.
Tube has a black plate, one side halo getter, top radiator for cooler operation and longer tube life, crenelated round micas and is tight on base with no debris or rattling sounds. Sound tested in our Musical Paradise shop amp (see pics).
This tube will perform wonderful in your McIntosh Mc-30 monoblocks or Mc-40 stereo amplifier.
Tube ships via United States Postal Service (USPS) First Class Mail with tracking for domestic U.S. sale; Priority Mail is an option if you desire quicker
delivery. International orders ship via eBay International Shipping.
Package weighs twelve ounces (10 oz).
Please view my eBay store for other varieties of tubes.
Combined shipping always welcomed.
TUBES ARE GUARANTEED GOOD AND IN WORKING ORDER AT SHIPMENT. TRANSIT VIA POST CAN DAMAGE TUBES. THIS IS NO FAULT OF OURS BUT THE THIRD PARTY ENTITY THAT IS DELIVERING ITEM(S) TO YOU, I.E, USPS, UPS, FEDEX, YOUR NATIONAL CARRIER IF INTERNATIONAL, ETC. PLEASE INSURE THEM! WE CANNOT GUARANTEE FAILURES ON YOUR EQUIPMENT AFTER POWER UP AS THERE IS NO WAY TO ASCERTAIN HOW TUBES WILL INTERACT WITH YOUR ELECTRONICS; NOR IS THERE A WAY TO DETERMINE WHETHER THEY MAY HAVE FATAL FLAWS IN TUBES THEMSELVES! THESE ARE USED VACUUM TUBES AND TIME MAY HAVE TAKEN A TOLL ON THEM OVER THE MANY YEARS SINCE THEY WERE MANUFACTURED. WE CAN ONLY TEST FOR THE PARAMETERS MENTIONED ABOVE IN ONE OR MORE OF THE FOLLOWING EQUIPMENT WE USE FOR MEASURING: TV-7/U, JACKSON 648 & MAXI MATCHER 2.