14-08-2015, 03:51 PM
(This post was last modified: 14-08-2015, 03:53 PM by Nowhere-Man.)
(12-08-2015, 06:00 PM)Alan Douglas Wrote: US octal valves come loose from their bases frequently but it makes no difference to their operation. PVA ("white" glue or Elmer's) works for reattaching them and isn't strong enough to break the glass. Cyanoacrylate "super glue" has definitely been known to break the glass on 1920s UV-199s. I know of two instances and the owners weren't happy. Glass is weak in tension and the glue can pull it apart. Some epoxies are too strong also. The wrong type, on a rear-view mirror, can pull a divot out of the glass.
Here is a pic of what there is so far. I wasn't happy with a few things so decided I'd go over some of my work and just rewire everything with new wires. So, the heat-shrink and soldered wire-to-wire joints will be going. This is really a very simple radio and it may well be persuaded to work again. My work so far was a bit amateurish but, of course, I was only a beginner at the time and soldering takes practice. In order to do a better job I need to take off the tuning chord and plate and try and get access to valve pins in awkward spots.
The big yellow cap is new and was bought some months ago. Some of the valves have been taken out but I still have them. Nothing has been lost. It just wants tidying up and the circuit checking carefully before supplying 100 volts or so HT.
