On Sat, 8 Oct 2011 04:34:36 -0700 (PDT), Ron wrote: >To enable the TR7 to transmit on all frequencies 1.5-30MHz simply unsolder the >collector of Q9001 on the DR7 board. See Figures 4-1 and 4-2 in the Service >Manual.
The method I arrived at was actually an outgrowth of this mod, which I found published on GW4ALG's web site. The Q9001 mod leaves out the 2.5 and 5.0 MHz bands, but they can be restored by a trace cut on the digital control board. Since the collector of Q9001 toggles a signal on the digital control board, both mods can effectively both be done on the digital control board and the OOL signal is preserved. 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
