[TowerTalk] Tuner SWR won't stay down

[Tom Osborne]

Hi Robert.

Thought about that, but when the tuner is not in the 'tune' mode, it 
works fine just straight through.

That is still a good idea.  Will check it out tomorrow.  73
Tom W7WHY




On 1/1/2015 5:24 PM, Robert Serfas wrote:
> Try checking the coax connectors where they mount to the chassis. I had a MFJ tuner that had wildly variable SWR, turned out it was the riveted so-239 connectors. Cleaning the places where connectors mount and replacing the rivets with 4-20 hardware with lock washers cured it.
>
> Sent from my iPad
>
> On Jan 1, 2015, at 7:15 PM, Tom Osborne <w7why at frontier.com> wrote:
>
>> Hi Roger.
>>
>> Yes, I did try that. I disconnected the torroid from the circuit.  I think it is something getting hot but just can't feel anything that gets overly warm inside.  It does drift faster at high power than at low power.  I also connected the input coax connector directly to the capacitor and the output coax jack to the other cap.
>>
>> I thought it might be the coil getting hot, but it is not even getting warm.   May end up scrapping it and just using the parts to build something else.  It is a real puzzler.  Thanks and 73
>> Tom W7WHY
>>
>>
>>
>> On 1/1/2015 2:39 PM, Roger (K8RI) on TT wrote:
>>> Have you checked the toroid? It's been a few years since I had one, but IIRC the toroid is always in the circuit on the 989C.  If not, how about the output selector switch?  I've purchased more than one tuner/antenna switch etc that had missing solder joints, or bridged connections from too much solder.
>>>
>>> 73
>>>
>>> Roger (K8RI)
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk at contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk