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Radio Wrangler · 18th May 2016, 1:00 am

That H2900 i had was a prototype, so it was fully stuffed. There was one synthesiser. There were two front-ends and early IFs.... the motor driven preselectors for the two diversity paths were mechanically ganged. Then in the final IF there were USB and LSB filters on each diversity path, so the one box did 2 channel diversity (space, or polarisation) of ISB signals.

All four utputs were populated so presumably an external scorer controlled audio switching.

There were also filters for FSK.

David

18th May 2016, 1:00 am	#56
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,876	Re: ISB Receivers That H2900 i had was a prototype, so it was fully stuffed. There was one synthesiser. There were two front-ends and early IFs.... the motor driven preselectors for the two diversity paths were mechanically ganged. Then in the final IF there were USB and LSB filters on each diversity path, so the one box did 2 channel diversity (space, or polarisation) of ISB signals. All four utputs were populated so presumably an external scorer controlled audio switching. There were also filters for FSK. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done