[TenTec] 9420 P/S Problem....Need Help

[w3ka at lycos.com]

   Double check that you have a good solid "ground braid" connection 
between the Omni 6, the Hercules,
   and the power supply.



   On 2015-04-20 19:57, Bob Good wrote:




> Greetings "Tentechnical" Friends........ I have a problem with my old 
> "reliable" OmniVI > Hercules II (with 9420) > 238 station. I have 
> concluded the problem is with the 9420. Omni straight through is fine. 
> Disconnect the 9420 and run the Herc off a battery, works fine. Here is 
> the symptom: While bringing the power up to about 200 watts output into 
> a dummy load with a 1.2:1 swr, a relay starts to chatter in the power 
> supply. The pilot lamp in the Herc (now a led) almost extinguishes with 
> each pulse of the relay. Monitoring the Voltage, the Herc Meter 
> indicates it just wiggles at about 14 volts indicated. The RF output 
> appears to drop out with each relay pulse and the current meter wildly 
> fluctuates. I have all the manuals by Ten Tec and have looked at the 
> diagrams. I have opened the top of the unit and nothing is burned. 
> Harness plugs appear to be seated. I am assuming the problems lies with 
> the circuitry on the P/S controller board involving either K-3 or K-4. 
> I have not tried to go further by hooking the 9420 back up to the Herc 
> or disassembling the unit. I have not yet checked voltages inside. Of 
> course, it is running on "220" vac. I am hoping some of you perhaps 
> have had the same problem and can help me step through the repair. If 
> you have free long distance, I am available at 912-863-5767. All my 
> info on QRZ is current. Thanks for reading and please spread the word. 
> Regards, Bob K4BG
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec [1]


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