You may find this of interest. A VERY worthwhile upgrade, highly recommended:
http://members.ziggo.nl/cmulder/drake.htm#bookmark5 Also, replace the electrolytic cap(s) while you are working on the PS board. You will be glad you did. That may be the source of your +25 problem anyway. Any Tantalums can be left as is, they should be OK. 73 -Jim NU0C On Fri, 29 Jun 2012 13:57:18 -0400, Mike Williams wrote: >While troubleshooting a VCO power supply problem, R2103, the 1K pot on the PS >board fell off! Just what I needed while trying to get this radio going >again. I know this is an old topic, but does anyone know where to find a >replacement that will fit on the board, or perhaps someone has one they will >part with. Any assistance is certainly appreciated. > >PS: the +25 Vdc rail for the vco is reading 17 volts so I suspect the problem >is with the PS board or something loading down the rail. > >Thanks for any assistance, > >Mike W4DL -- 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
