Predicta Tandem 17DAP4 CRT for testing ?

[bandersen]

The Tandem is a series filament set and using a 450 ma tube may cause problems. I suggest you get an 8YP4 bench CRT. They have a 600mA filament and are designed for subbing many types of Crts while servicing. No a shorter cable won't cause any problems but that's a lot of work. I'd try using the full length one