My Brand New CTC-7!

[Jeffhs]

Originally Posted by DaveWM

my recommendation is do nothing to the crt socket, except maybe some electrical tape to stabilize if for now. Get the set working, worry about the CRT later.

My sentiments exactly. I don't know what type CRT is in your set, but if it's a rare one, I'd tape the socket so it won't move, as DaveWM suggested, and forget it for the time being, as long as you are restoring the TV. I had a bad experience with a CRT in a Philco "Microgrid 390" TV I rescued from a curb years ago. The socket came completely off the neck of the CRT, so I just soldered the leads from the TV chassis to the wires protruding from the neck. It worked for a short time, but eventually one of the wires broke off, shorted to another lead, there was a good sized spark, and ...

I wound up junking the set soon after that, as I was in no position at the time to look around for a used tube. Too bad, since the Microgrid series was one of Philco's best b&w TVs of the 1950s, with a cascode tuner and an excellent sound system. I was surprised the set didn't have a phonograph pickup input on the rear of the chassis--that's how good the sound was. I had a Zenith K-2739 1963 b&w 23" TV with a good audio system as well, but that set did not have a phono input either; why, I'll never know, since the set had a 6BN6 gated-beam audio stage, 6BQ5 output and a 6x9 oval speaker in the base of the cabinet, below the CRT. That TV easily had the best mono sound system of any set I owned before or since then, although today it is possible to connect a flat-panel TV to a stereo system and have better sound than even the best mono TV audio systems produced 50-60 years ago.

[rca2000]

if it is the original tube...it should be a 21CYP22 and those are NOT real common !! I agree...wrap several layers of tape around it and get it secured. Get the set working good and THEN...maybe worry about the base. I had a CTC-5 with a tube with a similar base ...and it ALSO had like--new readings on ALL tests--life, emissions, cutoff AND gun balance. I was just VERY careful with it....it was fine..

UNLIKE..the last 21AXP22 set I came across. that base was PERFECT...but the tube was STILL full of AIR... shame--since it HAD shown good supposdely--the last time the set ran...about 40 years ago or so !! I guess all of that "idle time in a basement"....took its toll on the seals.

I ALSO have a number of thsoe Zenith sets...with 6BQ5 audio amp and a couple of them have a 10" speaker and an electrostatic tweeter I believe !! I expect the size of the OPT and B+ on the tube means it could give about 5 watts of power or so...not sure it is really enough to push that big speaker to its full potential though. ONE of them is a 23" set with a weak tube and it WILL produce a raster ...b ut there are bad caps and something is smoking near the cap by the 6BQ5. The other one is a 24" set with a decent tube accd. to my 70. It preduces a pretty good raster....with some foldover--and a big cap by the tranny is geting warm...so I know it TOO needs caps. Both are 1958 sets I beleive..one is an SC400.

I have a couple of others wiht the 6X9 speaker and 6BQ5 amp. I KNOW they have very good sound !!

[SwizzyMan]

Originally Posted by Jeffhs

My sentiments exactly. I don't know what type CRT is in your set, but if it's a rare one, I'd tape the socket so it won't move, as DaveWM suggested, and forget it for the time being, as long as you are restoring the TV. I had a bad experience with a CRT in a Philco "Microgrid 390" TV I rescued from a curb years ago. The socket came completely off the neck of the CRT, so I just soldered the leads from the TV chassis to the wires protruding from the neck. It worked for a short time, but eventually one of the wires broke off, shorted to another lead, there was a good sized spark, and ...

I wound up junking the set soon after that, as I was in no position at the time to look around for a used tube. Too bad, since the Microgrid series was one of Philco's best b&w TVs of the 1950s, with a cascode tuner and an excellent sound system. I was surprised the set didn't have a phonograph pickup input on the rear of the chassis--that's how good the sound was. I had a Zenith K-2739 1963 b&w 23" TV with a good audio system as well, but that set did not have a phono input either; why, I'll never know, since the set had a 6BN6 gated-beam audio stage, 6BQ5 output and a 6x9 oval speaker in the base of the cabinet, below the CRT. That TV easily had the best mono sound system of any set I owned before or since then, although today it is possible to connect a flat-panel TV to a stereo system and have better sound than even the best mono TV audio systems produced 50-60 years ago.

The CRT is a 21CYP22 not too common these days.