09-13-2008, 07:44 PM
Hi Brian
I can't speak with authority on Zenith...it's my least favorite brand...
On Philco sets, when aligning the shortwave bands, it is helpful to check for an image of the signal generator frequency below the desired frequency. Let's assume a 37-650, IF of 470 kc. You begin to align the upper SW band at 18 mc. If you get the signal at or near 18.0 on the dial, then check to see if you can hear a weaker signal at 17.06 mc (940 kc or 470 x 2 below the desired signal). If you can't hear the weaker image, try increasing the signal strength from the signal generator. If that doesn't work...the set is, most likely, badly misaligned.
In other words, the stronger peak is the one you want.
The same probably holds true for Zenith. YMMV.
I can't speak with authority on Zenith...it's my least favorite brand...
On Philco sets, when aligning the shortwave bands, it is helpful to check for an image of the signal generator frequency below the desired frequency. Let's assume a 37-650, IF of 470 kc. You begin to align the upper SW band at 18 mc. If you get the signal at or near 18.0 on the dial, then check to see if you can hear a weaker signal at 17.06 mc (940 kc or 470 x 2 below the desired signal). If you can't hear the weaker image, try increasing the signal strength from the signal generator. If that doesn't work...the set is, most likely, badly misaligned.
In other words, the stronger peak is the one you want.
The same probably holds true for Zenith. YMMV.
--
Ron Ramirez
Ferdinand IN
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