03-19-2018, 10:20 PM
>It ain't pretty. Not sure if that matters much if the turns are touching or have a gap between?
What I do when rewinding is wind three or four turns fairly neatly and then use my thumbnail to close the small gaps between the turns. It's better not to have big gaps between the turns but it is what it is.
> I think my rewound OSC coil is working.
Well the acid test is to use a counter or an AM/SW radio to listen for the oscillator signal. W/the dial set to 550KC the osc signal should be be @ 1010KC and w/the dial set @1500KC the osc signal should be @ 1960KC. Ah yes that was when hurricane Donna hit. But I digress.
> So I tried one I had on hand that measured 100K so see if it made a change. It didn't.
The value of that pot needs to be fairly low < 50K else wise all of the attenuation will be in the first few deg of movement.
>So I'm thinking I should just let the OSC coil as is, as it seems to be working, reinstall it and concentrate on the ANT coil?
I would make sure the it's oscillating across the whole range of frequencies. Then go on to the ant coil. Typically it is the primary that is the issue. Also I find that the resistors can drift badly especially the higher value ones around the detector stage and the two 2 w voltage dividers.
With a good alignment using a signal generator (not this by ear crap) they are fairly sensitive, no 116X but not bad.
GL & say hi to ur dad 4 me.
What I do when rewinding is wind three or four turns fairly neatly and then use my thumbnail to close the small gaps between the turns. It's better not to have big gaps between the turns but it is what it is.
> I think my rewound OSC coil is working.
Well the acid test is to use a counter or an AM/SW radio to listen for the oscillator signal. W/the dial set to 550KC the osc signal should be be @ 1010KC and w/the dial set @1500KC the osc signal should be @ 1960KC. Ah yes that was when hurricane Donna hit. But I digress.
> So I tried one I had on hand that measured 100K so see if it made a change. It didn't.
The value of that pot needs to be fairly low < 50K else wise all of the attenuation will be in the first few deg of movement.
>So I'm thinking I should just let the OSC coil as is, as it seems to be working, reinstall it and concentrate on the ANT coil?
I would make sure the it's oscillating across the whole range of frequencies. Then go on to the ant coil. Typically it is the primary that is the issue. Also I find that the resistors can drift badly especially the higher value ones around the detector stage and the two 2 w voltage dividers.
With a good alignment using a signal generator (not this by ear crap) they are fairly sensitive, no 116X but not bad.
GL & say hi to ur dad 4 me.
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
