[ARC5] [BoatAnchors] Updated: 80/40 Meters to Longwave Converter

[Bruce Long via ARC5]

If I was going to build a HF to LW converter i would think about buying a used preselector of null historical value on ebay, make use of the cabinet, rf amplifier if present and if needed and of course the preselection components and add the crystal oscillator and the mixed.
This would give good rf preselection, and band switching in an attractive enclosure at reasonable cost and effort.

      From: Arden Allen <gumbear at pacbell.net>
 To: David Stinson <arc5 at ix.netcom.com>; ARC-5 <arc5 at mailman.qth.net>; milsurplus at mailman.qth.net; boatanchors at mailman.qth.net 
 Sent: Thursday, April 16, 2015 3:52 PM
 Subject: Re: [ARC5] [BoatAnchors] Updated: 80/40 Meters to Longwave Converter
   
> .......I'm probably going to put a "wave trap"
(one trimmer cap, one coil) in front of the 40 Meter input
to reject the images.

Having built a preselector with one tank circuit I suggest a J-FET RF stage 
ahead of the mixer.  Lightly load the tank for best Q, you don't need the 
gain.

Arden Allen
KB6NAX

He who is cruel to animals becomes
hard also in his dealings with men.
We can judge the heart of a man by
his treatment of animals.
—Immanuel Kant 



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