08-12-2021, 04:20 PM
>I ordered two of these
RadioShack 125VAC SPDT Mini Push Button On/Off Switch, 3A to try.
These?? The important thing is that they have to be a latching switch. Push it in and release it and it stays on. Push it again and release it turns off. Momentary contact won't work.
Ron post awhile back a fix by replacing the switch with a look like from home depot. The post might be in the library.
>How do I solder a jumper across the switch? Is it safe? I am not going to get shocked right? Don't want to damage the radio in any way.
If you look it the block capacitor that the ac cord is connected to, one post has a white white wire solder to it. That's one side of the power transformer's to the ac line. That's all good and we're not going to fool with that. The other white wire that comes out of the power transformer is what we are looking at. Back to the block cap the other connection on it. The wire on it goes to the off/on switch. The connection on the off/on goes to the white wire on the power transformer.
I'm not sure how the connections are setup on the switch. If has solder lugs on the top (easy) on the bottom (not so easy) or wires.
Bottom line is need to get to the white wire that goes to the switch. Measure the resistance across the two and if you have abt 11 ohms all is well. If that's good then connect switched side of the block cap to it. Look for smoke!
Safety. Just be careful not to touch connections that have line voltage or HV. Using a variac w/an current indicator so you can watch it rise is good but not a must. Pulling the 84 for the 1st time or 2 till you get it sorted and check opt.
Here's one I did on a 41-300X. Scroll to post 7. Again I'm not sure it's the same setup. https://philcoradio.com/phorum/showthread.php?tid=17076
RadioShack 125VAC SPDT Mini Push Button On/Off Switch, 3A to try.
These?? The important thing is that they have to be a latching switch. Push it in and release it and it stays on. Push it again and release it turns off. Momentary contact won't work.
Ron post awhile back a fix by replacing the switch with a look like from home depot. The post might be in the library.
>How do I solder a jumper across the switch? Is it safe? I am not going to get shocked right? Don't want to damage the radio in any way.
If you look it the block capacitor that the ac cord is connected to, one post has a white white wire solder to it. That's one side of the power transformer's to the ac line. That's all good and we're not going to fool with that. The other white wire that comes out of the power transformer is what we are looking at. Back to the block cap the other connection on it. The wire on it goes to the off/on switch. The connection on the off/on goes to the white wire on the power transformer.
I'm not sure how the connections are setup on the switch. If has solder lugs on the top (easy) on the bottom (not so easy) or wires.
Bottom line is need to get to the white wire that goes to the switch. Measure the resistance across the two and if you have abt 11 ohms all is well. If that's good then connect switched side of the block cap to it. Look for smoke!
Safety. Just be careful not to touch connections that have line voltage or HV. Using a variac w/an current indicator so you can watch it rise is good but not a must. Pulling the 84 for the 1st time or 2 till you get it sorted and check opt.
Here's one I did on a 41-300X. Scroll to post 7. Again I'm not sure it's the same setup. https://philcoradio.com/phorum/showthread.php?tid=17076
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
