Ok. Let’s try this again…RCA 9TC240 Alignment

[Penthode]

There is something fundamentally wrong here because the alignment process should be pretty straight forward. It is however extremely important to try and understand what is happening here.

The HP equipment was not expensive. As I said I shopped around and the total price for the pair I bought was well under $100. As for sets not needing alignment after more than 70 years? Let's put it this way: a proper alignment transforms the quality of the picture and sound. These RCA sets featured full Luma bandwidth. My sets after proper alignment can resolve the resolution wedge of the Indian head test pattern right to the center. Not many sets can do that.

So let's not disparage the process and find out what is wrong. As I said, the discriminator alignment is not working. The noise and the odd response suggests the 6AL5 is not conducting. Can you check the 5.1 ohm resistor to the 6AL5 filament and check the tube is actually lit?