1948 (TS-4H) Motorola VT71 restored!

[bandersen]

zenithfan1 inspired me to post a little photo diary of my VT71 restoration.

Enjoy.


Arrival. It's in good shape aside from all the knobs being wrong.


Pretty much all original.


Ugh. Need to re-solder a CRT pin.


Apparently, this is the melted CRT mask. It hit a few tubes and the speaker


I really hope I never need to do this again!


Refinishing the cabinet. Citristrip is my favorite stripper lately.


Applying new decals from radiodaze.


The usual. Replaced the selenium with silicon. Wax caps with poly. And HV caps from Allied.


Ready to fire up. Got those knobs from a blonde VT71.


First signs up life using a 7VP1 CRT from an RCA WO-56A scope.


Seems safe enough to hook up the 7JP4


Old components. Those two caps in front were the source of much hair pulling. They came from the vertical oscillation/sweep circuit.
I assumed that mica caps rarely go bad. Boy was I wrong.


Replaced the 12AT7 and got my 1st stable image


Here it all is back together. I still need to track down a fine-tuning knob and do something for a CRT mask.


Here's some of the gear I used.