02-27-2018, 05:01 PM
Hi and welcome,
For those who want to take a peek at the service info in can be found here: https://www.scribd.com/document/36585862...Sams-441-2
>What are, good replacements for the fusistor
See pic...
> but all the tubes did glow.
>My meter says the second terminal of the filament dropping resistor is open
If the resistor was open all of your tubes wouldn't light. Did the dial lamps in the tuner come on??
>I got no continuity through the fusistor.
Probably a good thing. This will kill any hv being produce by the power supply. I would think that it's a bad idea to just replace the fusistor and hope for the best. There are a number of large value cap in the p/s that if they are electrically leaky will take out the fusistor and diodes just for starters.
Would replace the electrolytic caps before trying to power it up. Without that you are asking for a poke in the eye [Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]
> built with the cheapest electronics they could find.
I guess you've never heard of Muntz??
>So I'm assuming I will have to replace all the caps and resistors at the very least
I would check the resistors for reading in tolerance replace bad ones. Disk caps would leave alone. Horz and vert intergraters more than likely with need a rebuild.
GL
For those who want to take a peek at the service info in can be found here: https://www.scribd.com/document/36585862...Sams-441-2
>What are, good replacements for the fusistor
See pic...
> but all the tubes did glow.
>My meter says the second terminal of the filament dropping resistor is open
If the resistor was open all of your tubes wouldn't light. Did the dial lamps in the tuner come on??
>I got no continuity through the fusistor.
Probably a good thing. This will kill any hv being produce by the power supply. I would think that it's a bad idea to just replace the fusistor and hope for the best. There are a number of large value cap in the p/s that if they are electrically leaky will take out the fusistor and diodes just for starters.
Would replace the electrolytic caps before trying to power it up. Without that you are asking for a poke in the eye [Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]
> built with the cheapest electronics they could find.
I guess you've never heard of Muntz??
>So I'm assuming I will have to replace all the caps and resistors at the very least
I would check the resistors for reading in tolerance replace bad ones. Disk caps would leave alone. Horz and vert intergraters more than likely with need a rebuild.
GL
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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