[TenTec] Narrow signal on 28.027620 MHz

[John K3GHH]

Ken Brown wrote:
>> It does not go away; same signal strength (I'd give it about a 7 on our 
>> RST scale).
>>   
>> I don't know how to add attenuation at the antenna; are these the step 
>> attenuators I've seen that some QRP operators use to reduce their output 
>> power?
>>   
>>     
> Since it does not go away when you disconnect the antenna, adding 
> attenuation to the antenna port is not going to tell us anything. The 
> signal is something generated within the receiver. It is either the 
> product of the mixture of oscillators and clocks all generated inside 
> the receiver, or it is possible that there is something getting in on 
> another lead, such as the power leads, data connection or audio 
> connections. I'm inclined to believe it is all from within the receiver 
> and no outside signals are involved. With a system as complex as the 
> Orion, it is possible that to duplicate it on another Orion almost every 
> single setting would have to be identical. Maybe the fellow who cannot 
> hear it on his Orion has some setting completely different from you, 
> resulting in one of the necessary component oscillators or clocks not 
> being on the same frequency as in your Orion. What about the local 
> oscillator in the auxiliary receiver? Maybe he habitually leaves his on 
> a WWV frequency and you habitually leave yours on some other frequency.
>   
>> I am going to try turning off other electrical gear near the transceiver 
>> (computer, principally) and see if that makes a difference.
>>
>>   
>>     
> Good idea. And in addition to turning things off, disconnect as much 
> stuff from the rig as possible.
>
> DE N6KB
>
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>   
Thanks, Ken... no change when other things turned off. I'm going to not 
pursue this thread further; if anyone becomes curious about it later, or 
duplicates the issue, he or she can revive it. I appreciate your comments1

-- 
John, K3GHH