11-27-2013, 11:01 AM
Well, well...
Found the SW problem with this tuner today, basically completing troubleshooting and all but completing repairs.
Turned out to be the trimmer cap for the SW band. It's one of those frame type caps, and the plates were all rubbing, so shorting out the LO.
Nearly drove me nuts trying to find the trouble on this one, these type caps don't generally have those sorts of problems, especially when they're pretty much covered up. But, shorted it was. When I opened it up all the way, the LO came to life.
I've got a temporary replacement in there just to make sure that I could properly align the band, which was pretty simple except that my temp trimmer is a much higher capacitance than the original and so very temperamental to adjust.
I've PM'ed Norman to see if he has one I can buy. But, I guess I can say now that I have a working set of 800B chassis, soon to have a pair of them.
Guess now I have to start getting creative about a cabinet for at least one of them.
Found the SW problem with this tuner today, basically completing troubleshooting and all but completing repairs.
Turned out to be the trimmer cap for the SW band. It's one of those frame type caps, and the plates were all rubbing, so shorting out the LO.
Nearly drove me nuts trying to find the trouble on this one, these type caps don't generally have those sorts of problems, especially when they're pretty much covered up. But, shorted it was. When I opened it up all the way, the LO came to life.
I've got a temporary replacement in there just to make sure that I could properly align the band, which was pretty simple except that my temp trimmer is a much higher capacitance than the original and so very temperamental to adjust.
I've PM'ed Norman to see if he has one I can buy. But, I guess I can say now that I have a working set of 800B chassis, soon to have a pair of them.
Guess now I have to start getting creative about a cabinet for at least one of them.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
