Loctal Tubes

[Electronic M]

Originally Posted by jr_tech

I found a few tubes in my unsorted box that did not have the usual locator bump on the side of the metal base. These were mostly labeled Zenith and GM, with one Admiral tube in the mix.... any idea who made them?

jr

If there is a 3-4 digit EIA code on them anywhere then it should be easy to tell...I've done that on some Silvertone badged CRTs I've had that I was curious about.

[jr_tech]

Originally Posted by Electronic M

If there is a 3-4 digit EIA code on them anywhere then it should be easy to tell...I've done that on some Silvertone badged CRTs I've had that I was curious about.

I didn't see any when I pulled them out of the box... perhaps the tubes are too old to have EIA code markings, or they have mostly rubbed off. I went back and double checked and did find a faint code on the Admiral tube.... It appears ro read "713", which is Taylor, a Chicago mfg, mostly known (by me, at least) for their transmitter tubes and mercury vapor rectifiers. Perhaps they did source receiving tubes for Admiral.

jr