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Stewart Warner, no low end
3/27/2007 7:24:10 AMJohn
My Stewart Warner Model R126 won't get anything below about 1000KC. Works good above that. Would adjusting the padder correct that?
3/27/2007 8:44:56 AMLewis L.
:My Stewart Warner Model R126 won't get anything below about 1000KC. Works good above that. Would adjusting the padder correct that?

Try it and see, but my guess is that it was working once, and you have component problems in the local oscillator circuit that is going to need part replacement, or the tuning capacitor is shorting during that part of its rotation.

Lewis L.

3/27/2007 1:01:04 PMJohn
::My Stewart Warner Model R126 won't get anything below about 1000KC. Works good above that. Would adjusting the padder correct that?
:
:Try it and see, but my guess is that it was working once, and you have component problems in the local oscillator circuit that is going to need part replacement, or the tuning capacitor is shorting during that part of its rotation.

The tuning capacitor was shorting and I cleared that so now I can get one station at 700KC and one more below that comes in real real faint.
:
:Lewis L.

3/29/2007 1:14:35 AMThomas Dermody
Did you mess with the padder? If sensitivity is poor at the low end, the padder may now need re-adjustment. You must adjust for both good alignment of stations and good sensitivity at that end. Often you'll see 'rocking' the padder suggested in schematics. The adjustment may take several tries before a good comprimise is made. Make sure that everything else is adjusted well, too. Everything must be precisely aligned for a radio to be sensitive all over the dial.

Thomas

3/29/2007 8:53:48 PMThomas Dermody
Actually, you're supposed to rock the tuning condenser back and forth while adjusting the padder, to see when it's aligned properly and is most sensitive.
3/30/2007 1:06:39 PMJohn
:Actually, you're supposed to rock the tuning condenser back and forth while adjusting the padder, to see when it's aligned properly and is most sensitive.
3/30/2007 1:08:49 PMJohn
::Actually, you're supposed to rock the tuning condenser back and forth while adjusting the padder, to see when it's aligned properly and is most sensitive.

I found plates touching in the tuning condenser and then got some low end. Adjusted the padder and got much better reception at the low end but still not real good--only about a 10' antenna so maybe that's affecting the low end more, too.

3/31/2007 9:26:56 PMThomas Dermody
Most superheterodynes should do well without much of an antenna, but it's best to put a really long one on. String it across the room for best results.

If reception is good elsewhere on the dial, however, you need to tweak the adjustments. It can take some time and practice before all stations line up and come in well. Some sets are really particular.

Thomas

3/29/2007 8:53:59 PMRadiodoc
Thomas,

Didn't you mean rocking the tuning condenser while adjusting the padder?

Radiodoc

:Did you mess with the padder? If sensitivity is poor at the low end, the padder may now need re-adjustment. You must adjust for both good alignment of stations and good sensitivity at that end. Often you'll see 'rocking' the padder suggested in schematics. The adjustment may take several tries before a good comprimise is made. Make sure that everything else is adjusted well, too. Everything must be precisely aligned for a radio to be sensitive all over the dial.
:
:Thomas



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