1000A - 9999Z
There are many great four digit tubes such as the 7025, 6550, 5654 and 7868. These tubes tend to be high-end versions of standard tubes or variants of standard tubes though there are plenty that just exist on their own.
-
On Sale
NOS GE USA 5686 Black Plate Top Fat D GET Windmill 3 Mica Vacuum Tube 100%+
GE
Now: $1.81Was: $2.01Matched, Tested & Guaranteed Vacuum TubesAll tubes are guaranteed to be 100% as described or your money back. We are known for our excellent customer service! All tubes have been tested for mutual transconductance, shorts, leaks, gas and noise on one...Now: $1.81Was: $2.01