My Telefunken mystery tube
98.114.239.169 |
||
| Posted on April 22, 2017 at 19:21:24 | ||
|
Posts: 155
Location: Keystone state Joined: December 23, 2016 |
Is there any way to visually identity a TFK 12ax7 vs 12au7 ribbed plate? I have a tube with absolutely zero label left except a tiny part of the TFK diamond label so I not sure what this tube is. I only have a Orange tube tester which isn't of much help but the tube tested "ok" as a 12ax7 by that tester. I only have another TFK ECC83 smooth plate to compare with here at home. So any help I'd appreciate
Sitting here on the Group W bench
|
|
| Exhale onto the tube...., posted on April 22, 2017 at 21:54:35 | |
|
....the humidity of your breath will often show where the paint has shed off and will illuminate the original lettering. Or not.
|
|
