Found a CTC5 Aldrich (sorta)

[wkand]

Originally Posted by dieseljeep

I remember seeing one of the price lists, where the 21AXP22, was like $220 VS the 21CYP22, priced at $150. I don't think the conversion kit was any more than $10 or $15, at the time.
Maybe, the original went to air, that early.
The technician probably told them, it was a better way to go.

Not sure what you mean "Maybe the original went to air, that early". The set was 17 years old at the time of the replacement. That was a tremendous life for the original tube.

Funny that the conversion kit was only $15. if that were now, would probably be $200.