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On Apr 14, 6:38*pm, Bill M wrote:
Richard Knoppow wrote: * * Looking at the schematic it appears that bands 1 and 2 have fixed padders in them. For Band-2 its C-11, a 2200 mmf cap and probably one of the postage stamps. If this has changed value it will throw off the band. I think this is more likely than the coil having shifted. This is a common value so a replacement should not be hard to find. I suggest changing it before doing anything else. Trying to follow your posts across the different forums. The 38 is a plain jane AA5 with shortwave bands, *Don't try to read too much into it. *Image rejection is so poor on the top band that it really makes little difference as to how you tune it. *You're welcome to try, though. I'm glad you wrote because I mistook the band Paul was trying to align. Its band -3 which does not have a padder. So, if nothing else seems wrong the coil may need tweeking. I am pretty sure all the bands on the S-38 series tune with the LO above the signal frequency. One can always try it below. If that's wrong it won't track properly. I don't think it has any image rejection at the upper part of the top band:-) Richard Knoppow WB6KBL |
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