[1000mp] VCO Problems - No rx/tx below 7.499mhz FT1000MP

G0uihsteve at aol.com G0uihsteve at aol.com
Sun Apr 16 17:15:26 EDT 2006


 
Hi from Steve G0UIH
A quick thank you to EI7BA, W1TO, OH7WV & SM0KCO who posted info  on VA3CR.net
 
I had a problem occur yesterday in which I had no rx/tx on 7.499mhz and  
below.
I checked voltages at TP4003 on the Local Unit and everything that was  being 
controlled by TC4001 was way out, reading 12.6 volts.
 
After following the advice on the web page, I carefully inspected the  solder 
joints in and around TC4001 and then found that when putting slight  pressure 
on the green coil, the unit sprung into life. So out came the board and  I 
resoldered some of the joints on the back side on the local unit,  especially 
ones around the coil. For good measure I went over solder  contacts what I could 
(without doing any SMC work) I then re-connected  the board.
 
Well - a little time and patience paid off. Following reasemble, the rig  
burst into life on all bands. I then re-checked the voltages at TP4003 and the  
values for the 4 test freqs below 7.5mhz were all correct and within  limits.
 
Tnx again guys -
73 Steve G0UIH



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