02-20-2019, 12:30 AM
Hey Bruce
>This allowed the plate voltage to go to 353 volts.
Seems a bit high you want to check it by measuring it as per the service literature. There it has you measure from plate to cathode and should see abt 200vdc. Tiz a 44 not a 4-400.
> motor boating stopped but cannot receive any stations.
Might want to try a listen for the LO. It's going to be 260kc above the incoming signal. Could be the osc isn't running.
You can connect a generator to the grid cap of the mixer and use a 260kc signal W/400cy modulation to check the IF strip and you can give a tuneup too.
> Shadow box for the Philco 91 receiver
If you have nothing but time on your hands checkout post #49 or so. http://philcoradio.com/phorum/showthread...829&page=4
> Grill cloth for the model 91 version 126 radio.
A few years back there where a number of sources to obtain grill cloth but most have folded. Now there's two or three so may be difficult to find an original style of cloth for your particular set. Ron could tell you better than I what would be a suitable replacement.
> I have a model 90, which is next on my list of projects.
The model 90 is a little tricky as there are three different versions an early, mid, and late. Easiest way to tell is the output tube/tubes.
Terry N3GTE
>This allowed the plate voltage to go to 353 volts.
Seems a bit high you want to check it by measuring it as per the service literature. There it has you measure from plate to cathode and should see abt 200vdc. Tiz a 44 not a 4-400.
> motor boating stopped but cannot receive any stations.
Might want to try a listen for the LO. It's going to be 260kc above the incoming signal. Could be the osc isn't running.
You can connect a generator to the grid cap of the mixer and use a 260kc signal W/400cy modulation to check the IF strip and you can give a tuneup too.
> Shadow box for the Philco 91 receiver
If you have nothing but time on your hands checkout post #49 or so. http://philcoradio.com/phorum/showthread...829&page=4
> Grill cloth for the model 91 version 126 radio.
A few years back there where a number of sources to obtain grill cloth but most have folded. Now there's two or three so may be difficult to find an original style of cloth for your particular set. Ron could tell you better than I what would be a suitable replacement.
> I have a model 90, which is next on my list of projects.
The model 90 is a little tricky as there are three different versions an early, mid, and late. Easiest way to tell is the output tube/tubes.
Terry N3GTE
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
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