Dueling Heathkits

[kf4rca]

Thats probably the Heathkit part number. The coil could be smaller depending on the value of the cap thats across it. Probably have to keep those two together when substituting.
Is there no way you can repair L451?

[Electronic M]

Originally Posted by kf4rca

Is there no way you can repair L451?

He'll have to try before answering that...accurately.

This is a good circumstance to learn. The old part don't work and there is nothing to loose by trying to fix it...If you are thinking you need a new one anyway, then trying to mend the original looses you nothing.

[Jon A.]

Originally Posted by kf4rca

Thats probably the Heathkit part number. The coil could be smaller depending on the value of the cap thats across it. Probably have to keep those two together when substituting.
Is there no way you can repair L451?

I have something in mind and will try it very soon. I had to look back on my lifetime training in redneck engineering for a possible solution. The wiring is still intact and the slug is still there, so it's probably functioning.

On a side note, I've been digging into the GR-370 again. I hooked it to my DVD player and got clear sound, but on an adjacent channel so perhaps someone messed with the IF stage. I did find a diddle stick in there. Also, to my surprise, it has a HV rectifier tube, a 3A3C. I can draw an arc from the fly lead, but the tube shows no signs of life. It isn't gassed out though. Might the tube be bad, or could it be something else?

[jr_tech]

Possibly open filament... if you don't have a tube checker, check the filament resistance between pin 2 and pin 7, it should be around 2 ohms or less. I just measured one at 1.78 ohms.

jr

[kf4rca]

Can you see the filament glowing in the neck of the tube?