11-01-2010, 05:27 PM
Hi Steve & Welcome!
If your Philco is tuned to 1010kc take a working set and tune it to 1010kc + the IF frequency 450kc equaling 1460kc.With the working set tuned to 1460kc. If the working set is a small transistor job hold it near the Philco's osc coil. If it is a tube set hook the antenna leads together. Now if the Philco's osc is running you will hear a swish as you gently tune the Philco around 1460kc.
Or
Another thing to check is to see if there is any - voltage on the grid of the mixer tube. Use a high impedance meter( like a vacuum tube job No vom) If it is running measure grid cap + to the chaiss ground - and you should see a small - voltage like a 1/2volt or so.If there is any + voltage there it ant' working. Just for laughs you may have wound the osc tickler in the wrong direction. If so just switch the connection where the wires are soldered the the components in the set.
Also
Check ALL of the resistors. They are CRITICAL to the performance. Have worked on a bunch of these superhet/regens and have found that the resistors have been WAY out of spec. Particularly the ones around the mixer and if amp/regen det.
I've got a little model 600 it''s very similar to your 80 that I did a crap load work to it.It plays great but has an intermittent it that is going to drive me nutz!!! If you care to read about my woes do a search on model 600
Terry
If your Philco is tuned to 1010kc take a working set and tune it to 1010kc + the IF frequency 450kc equaling 1460kc.With the working set tuned to 1460kc. If the working set is a small transistor job hold it near the Philco's osc coil. If it is a tube set hook the antenna leads together. Now if the Philco's osc is running you will hear a swish as you gently tune the Philco around 1460kc.
Or
Another thing to check is to see if there is any - voltage on the grid of the mixer tube. Use a high impedance meter( like a vacuum tube job No vom) If it is running measure grid cap + to the chaiss ground - and you should see a small - voltage like a 1/2volt or so.If there is any + voltage there it ant' working. Just for laughs you may have wound the osc tickler in the wrong direction. If so just switch the connection where the wires are soldered the the components in the set.
Also
Check ALL of the resistors. They are CRITICAL to the performance. Have worked on a bunch of these superhet/regens and have found that the resistors have been WAY out of spec. Particularly the ones around the mixer and if amp/regen det.
I've got a little model 600 it''s very similar to your 80 that I did a crap load work to it.It plays great but has an intermittent it that is going to drive me nutz!!! If you care to read about my woes do a search on model 600
Terry
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 it!
Terry
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