08-06-2024, 06:48 PM
Hi Bruce
You can replace #29 w/2 10mfd 450v caps. Cut the bottom off of the original cap about 3/4" from the bottom and remove the innards. Fit the new ones inside and wire them in. There's pics around if you need help. Get rid of the large blue cap and the Malory too.
Volume control has been replaced, no big surprise. On #28 you can replace the line bypass cap w/a .015 as stated but the other cap is a filter for the bias voltage. What I do is use a 10mfd 35 or 50v cap +side goes to the chassis - to the ct of the pt. This is what the early model 80 sets used and it provides better filtering in the - leg of the p/s.
The common issues are resistor around the 2nd det being out of spec, If you need to get at #18 you might find it better to drill out the three rivets and lift the covers off. You can get them a good cleaning w/a soft scotch brite/wd-40. The 3 come off as 1. Use 3 sets of 6-32 machine screws,nuts, and lock washers. Pri on #2 and 10. When measuring #2 have the vc full up. When you get there we can talk about rewinding it's easy. Get some 36G magnet wire. Measure the resistance from one of the fat pins on the 80 to pin 2 of the 42 and then pin 3 of the 42 (and 80). Should read 2 or 3K if a lot higher it's bad news.
As for the grille cloth you might have a look at 2A here https://www.radiogrillecloth.com/products and see what think. It's pretty tough to find match these days.
https://philcoradio.com/library/download...%20178.pdf
You can replace #29 w/2 10mfd 450v caps. Cut the bottom off of the original cap about 3/4" from the bottom and remove the innards. Fit the new ones inside and wire them in. There's pics around if you need help. Get rid of the large blue cap and the Malory too.
Volume control has been replaced, no big surprise. On #28 you can replace the line bypass cap w/a .015 as stated but the other cap is a filter for the bias voltage. What I do is use a 10mfd 35 or 50v cap +side goes to the chassis - to the ct of the pt. This is what the early model 80 sets used and it provides better filtering in the - leg of the p/s.
The common issues are resistor around the 2nd det being out of spec, If you need to get at #18 you might find it better to drill out the three rivets and lift the covers off. You can get them a good cleaning w/a soft scotch brite/wd-40. The 3 come off as 1. Use 3 sets of 6-32 machine screws,nuts, and lock washers. Pri on #2 and 10. When measuring #2 have the vc full up. When you get there we can talk about rewinding it's easy. Get some 36G magnet wire. Measure the resistance from one of the fat pins on the 80 to pin 2 of the 42 and then pin 3 of the 42 (and 80). Should read 2 or 3K if a lot higher it's bad news.
As for the grille cloth you might have a look at 2A here https://www.radiogrillecloth.com/products and see what think. It's pretty tough to find match these days.
https://philcoradio.com/library/download...%20178.pdf
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
