Admiral 14R12 Restoration

[Kevin Kuehn]

Originally Posted by dieseljeep

I misquoted the CRT type number as a 14CP4. Must have been thinking of a 17BP4. I was right with the model and chassis number, per Riders eight.
This model doesn't use the audio output, as the voltage divider, like the 20Z1, a year earlier.

I think you said 14BP4 in the classifieds post. Looking at the specs for 14CP4 and 14BP4 they look very close. Both spherical faces I believe.

[dieseljeep]

Originally Posted by Kevin Kuehn

I think you said 14BP4 in the classifieds post. Looking at the specs for 14CP4 and 14BP4 they look very close. Both spherical faces I believe.

Poor proof reading again! I meant 14CP4. I knew, there was a 14BP4, RCA used a 14EP4, which is similar. It all depended on the manufacturer, who made the tube, which number they assigned to it.
It's probably 50 years ago, since I bought and installed one.

[Crist Rigott]

Today I started on the restoration for reals. I again checked the CRT on my BK 467. All I could get is a .45 reading. Still into the red even after about a half hour. I then decided to try it in my 16" AMC TV. So I swapped the CRT's and the 14" gives a decent picture. Now it was a little out of focus, but it was bright enough! My shop is well lit and the picture showed up real good with all the lights on. So I'm proceeding wit the restoration.

Next up is to check the transformers and coils etc.

[Crist Rigott]

Earlier in this thread, there was a discussion on the CRT. It looks like it is a replacement. It has not been rebuilt. It is a CBS Hytron 14CP4. I couldn't read the date code.

This CRT has 2 getters. One on each side of the neck between 2 bands of the internal aquadag.

I'm including some pictures of the label and what the getters look like.

[Crist Rigott]

After a good look over, I pulled the HV rectifier tube and the lead off the 1B3GT tube then powered up the chassis using my variac and meters. No problems and all the tubes lit up. I used my meter to check the HV rectifier and 1B3GT tube heaters. All checked ok.