Hallicrafters T-54

[jr_tech]

Is the HV stable or does it drop considerably after the set has been on for a few hours?

jr

[Chip Chester]

For glue, perhaps a dab of rubber cement? May have to re-do it every now and then, but at least it'll come off when required.

[dtvmcdonald]

Originally Posted by jr_tech

Is the HV stable or does it drop considerably after the set has been on for a few hours?

jr

It seems quite stable, but I have the lid off the box. Its also
exactly as speced in Rider's, 4.7 kV.

[dtvmcdonald]

Oh yes, I forgot ... the original purpose of the whole thread!

The plate cap of the HV rectifier is awfully close to the lid of its box.
Is that safe? Should I install insulation? Should I go to a perforated
metal lid for cooling?

Or, I could install standoffs so the lid had 1/4 inch of
clearance both for HV purposes and ventilation.

[Notimetolooz]

Many people leave the lid off. There seems to be a fairly frequent problem of the HV fading away after the set warms up to some point. Some even install a small fan to cool the HV section. The exact cause isn't known but seems like it is a quirk of the HV coil. This must not have happened when the sets were new.

[dtvmcdonald]

The pushbuttons popping off is not a problem ... with the front on, they are
captive. And the loose one are still held on OK.

Now I need knobs. I need 5 of them. These are presumably push-on to 1/4 inch
spline shafts. They are also use in similar-era Hallicrafters radios such as SX43,
S38B, S53, SX62, etc., or at least they look the same.

Alternatively, as I am very non-picky, I need 5 push on black plastic knobs about 1 inch in diameter. I don't know the correct diameter.

I find nothing obvious on the internet.

[Chip Chester]

Possibilities? (I think they're repros, though.)

http://www.renovatedradios.com/product.php?product=235
http://www.renovatedradios.com/product.php?product=236