Hi David, On Mon, 12 Jan 2009 20:43:46 -0500, David & Chris Drake wrote:
>Looking for some historical information on Drake TR-7 boards. Welcome to the world of undocumented changes. User information like what you have provided helps add data points for the collective. >All this started because during an alignment, I could'nt get the required >voltage on the VCO board, (shy by around 1-1.5v) and found I only had 22 volts >going in instead of 24-25v. I can't answer your specific questions about the board changes, but I would recommend replacing the electrolytic caps on the PS boards - expecially C2108. They are getting old, and strange things can happen as they go bad. 73 -Jim -- Ham Radio NU0C TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://radiojim.exofire.net http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
