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Old 2nd Dec 2022, 10:04 pm   #78
Bazz4CQJ
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Join Date: Apr 2009
Location: Oxfordshire, UK.
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Default Re: Improving Selectivity In Vintage Receivers

I’m slowly assembling the Rx from QST 1966 originally discussed here https://www.vintage-radio.net/forum/...d.php?t=195648

The original uses one single tuned circuit at 455kHz followed by a normal IFT. I wondered whether using an IFT in place of the single tuned circuit would improve selectivity, including it at shown in the attached PDF. Of course, the plan is to use ceramic filters in place of the two crystals.

I suspect there may be some subtleties lacking in my arrangement; if anyone could advise I’d appreciate the input.

B
Attached Files
File Type: pdf QST moded IF pdf.pdf (93.9 KB, 48 views)
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