UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Full-Range IF Selectivity; The Hammarlund Variable Crystal Filter

Bazz4CQJ · 26th Dec 2022, 1:07 am

Ooops a post appeared then disappeared, but this was my reply.

I'd need to go back to the QST article, but I seem to recall that the 2nd IFT was a low impedance arrangement.

Just a comment on the QST article, there's about three solid pages of it and then additional half-page incremental bits scattered through the rest of the mag, so a bit inconvenient to read and absorb.

B

26th Dec 2022, 1:07 am	#2
Bazz4CQJ Dekatron Join Date: Apr 2009 Location: Oxfordshire, UK. Posts: 4,934	Re: Full-Range IF Selectivity; The Hammarlund Variable Crystal Filter Ooops a post appeared then disappeared, but this was my reply. I'd need to go back to the QST article, but I seem to recall that the 2nd IFT was a low impedance arrangement. Just a comment on the QST article, there's about three solid pages of it and then additional half-page incremental bits scattered through the rest of the mag, so a bit inconvenient to read and absorb. B __________________ Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.