Why was the 6AS7 dropped as a TV damper?

[benman94]

Originally Posted by Electronic M

Price perhaps? There was a good bit more metal on the plates than your standard 5V4...I have a hard time imagining a 6AS7 as being cheaper.

Also, your forgetting IMO the most interesting audio application of the part: Output transformerless Amplification. I designed/built an OTL amp based on those tubes several years ago...It has been my main amp ever since (it is that good).

Well I didn't mention it because RCA never officially sanctioned the 6AS7 as an OTL amp output tube. Still, it is an interesting application.

How stable is your OTL? I've toyed with the idea of building one, a variation of the Dickie and Macovski circuit from 1954, but I really don't like the idea of running the 6AS7s fixed bias, nor do I like the idea of having B+ at the speaker terminals...