02-03-2013, 10:26 PM
Hi Mountain man and Welcome to the Phourm!
Wouldn't lose any sleep over the filament voltage. (Tubes with a cathode have a heater. Tubes without a cathode have a filament).Some of those 1.5v tubes have to run with 1.5v or a little better especially the 1R5. If you have any other questions you may want to start your own thread on the matter. It will be a little less confusing. Tnx for stopping by.
GL
Terry
Wouldn't lose any sleep over the filament voltage. (Tubes with a cathode have a heater. Tubes without a cathode have a filament).Some of those 1.5v tubes have to run with 1.5v or a little better especially the 1R5. If you have any other questions you may want to start your own thread on the matter. It will be a little less confusing. Tnx for stopping by.
GL
Terry