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

Bazz4CQJ · 1st Jan 2023, 10:04 pm

Thanks for that Lawrence. Especially after your comment that you liked the selectivity control of your Hammarlund, and more so than your AR88, I think I'm going to try install a version of the Ham. system in the HRO. As previously commented, Ham. used that system on just about everything the made from '38 onwards, up to and including the SP-600, where they made one very small change to it.

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1st Jan 2023, 10:04 pm	#42
Bazz4CQJ Dekatron Join Date: Apr 2009 Location: Oxfordshire, UK. Posts: 4,935	Re: Full-Range IF Selectivity; The Hammarlund Variable Crystal Filter Thanks for that Lawrence. Especially after your comment that you liked the selectivity control of your Hammarlund, and more so than your AR88, I think I'm going to try install a version of the Ham. system in the HRO. As previously commented, Ham. used that system on just about everything the made from '38 onwards, up to and including the SP-600, where they made one very small change to it. B __________________ Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.