I had a TR-7 that was pre-warc. The optional Aux-7 board had IC's to populate to allow you to Rx/Tx on a band of your choice. Remove specific pins on the IC and a broad range of frequencies would be opened. The Aux-7 and the ICs were very expensive from Drake so there came a mod that required cutting one or two solder traces & (I believe) adding a few diode jumpers and you had a general coverage Rx/Tx transceiver.
I opened up its double balanced mixer with a dremel and rebuilt its double balanced mixer using a set of then "impossible to get" diodes (don't recall the specific number as it was in the 80's) and the sensitivity of that TR-7 was markedly improved. I sold it to a fellow doing EME. Apparently the TR-7 was coveted for that purpose at the time and then bought my first TenTec which was a new Corsair II. The TR-7 could clean up well but it took a lot of effort. But it was worth it. I've always thought the TR-7 was a rig ahead of it's time that got passed by technology. I see the K3' role today, much as the TR-7's role was then, just 30 years of technological improvements later. Gary KA1J > --- On Tue, 2/17/09, Vic K2VCO <[email protected]> wrote: > > > Wes Stewart wrote: > > > > > Herb Johnson and Swan were the Eric, Wayne and > > Elecraft of the day. > > > > I hardly think W & E would sell a product designed to > > appeal to CBers operating with illegal power and VFOs! > > Consider the Swan 1011: > > > > OK, I considered it: The Swan was a ten-meter transceiver that received on > 11-meters. My K3 receives the BC band to 30 Mhz, including the CB band. So > what? > > I once owned a KWM-1 that was removed from a B-47. (Likely one that had been > overflying the Soviet Union) It tuned and transmitted anywhere between 14 > and 30 MHz given the correct crystal plugged into a removable box on the > front panel. > > I believe that rig has been mentioned before in this thread as a milestone > radio. Should we did up Art Collins and chastise him? > > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
