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"Al Lorona" ) writes:
Thank you for your responses. These filters were definitely from the very early 70s or maybe mid- or late 70s. The guy who sold them to me at the swap meet mentioned that they may have come out of a Cubic or Astro rig of that era, but he wasn't sure and I just wondered if there was anybody here who might be sure of that. Thanks again, you guys. Al W6LX The name of the filter manufacturer that you mentioned, that did sound like the company that made the Swan filters (Cubic and Astro came later in the seventies, but my hazy memory connects them all together so I think there is a connection). I remember ads (and a quick check didn't find one) of them touting a really good filter made by that company. But I'm pretty certain it was in the 5MHz range. What does come to mind, maybe incorrectly, was that the Swan 250, the six metre SSB rig, had a 10.7MHz IF, but I can't be bothered to check that. I can't even remember why I would think that. But I can't see them going to 10.9MHz. I'm with the others, 10.9MHz is most likely a scanner (and I too would say Regency). And if it's not that, then it's some non-amateur piece of equipment. Not everything has to be for ham radio rigs, and I have my share of oddball crystal filters that came from somewhere but couldn't have been ham rigs. Load the inputs and outputs down to some extent, and then use a sweep generator to get a general idea of their bandwidth. If you're looking for SSB-width filters, then they aren't useful if they were for FM receivers. Post the information printed on the filters, and maybe someone just happens to know. Michael VE2BVW |
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