10-31-2013, 08:46 PM
Cleaned up the condenser on the right side. That one is the more critical one. It would be considered the main tuning it tunes the detector stage which controls the frequency that the set receives. The condenser or the left tunes the RF stage which will make the received signal louder.
With it cleaned up and a few more solder joints resolder I reapplied power and was rewarded with reception!! Got all the locals and WOR out of NY. Line noise here is kinda high. Everything seems to be working as is should. The RF tuning has a dead spot but there again probably a dirt issue.
Plugged in the 112A in the output stage, was using a 201A and make a big difference. Audio was much cleaner sounding. I am using a rather small output transformer out of a cheap AA5 set. If it had some more iron to it it to would improve the sound. The 112A is probably good for a few hundred milliwatts with 90v on the plate and 4.5 on the filament.
I didn't mention that a previous owner had soldered a jumper from C+ to C-. This was done to eliminate the C battery. Bad move plays much better with a C battery. I'm using a 9V job. Still need a little adjusting I think the grid leak is a little too high in value as it tunes pretty sharply. With it's own battery pack that should help with some of the noise I'm getting.
Terry
I'll see if I can catch Zoomer on 740 out of Ca
With it cleaned up and a few more solder joints resolder I reapplied power and was rewarded with reception!! Got all the locals and WOR out of NY. Line noise here is kinda high. Everything seems to be working as is should. The RF tuning has a dead spot but there again probably a dirt issue.
Plugged in the 112A in the output stage, was using a 201A and make a big difference. Audio was much cleaner sounding. I am using a rather small output transformer out of a cheap AA5 set. If it had some more iron to it it to would improve the sound. The 112A is probably good for a few hundred milliwatts with 90v on the plate and 4.5 on the filament.
I didn't mention that a previous owner had soldered a jumper from C+ to C-. This was done to eliminate the C battery. Bad move plays much better with a C battery. I'm using a 9V job. Still need a little adjusting I think the grid leak is a little too high in value as it tunes pretty sharply. With it's own battery pack that should help with some of the noise I'm getting.
Terry
I'll see if I can catch Zoomer on 740 out of Ca
