[TenTec] HELP! Eagle Tuning Problem

[Bob McGraw K4TAX]

Yes, coax jumpers do go bad from all the wiggling and jiggling, 
connecting and disconnecting.   And some are just pure crap to start with.

Also any PL-259 must be more than finger tight.   I use a pair of 4" 
Channel Lock pliers to snug mine.   That solves many many problems.

I use my antenna bridge on 144 MHz and a dummy load to test my 
jumpers.   I wiggle, jiggle, pull and push.  If the SWR flickers, I chop 
the PL-259 off and start with a new piece of coax and a new connector.  
It isn't worth trying to save a questionable connector or piece of coax.

73

Bob, K4TAX

On 1/1/2020 11:32 AM, Byron Cordes via TenTec wrote:
> Let’s hope for the best. Bad coax jumper Bad pl259 antenna , ground connection on antenna . Do you have different antenna ?
>   I just had a bad coax a few months ago.
> 73s Byron AC9PA
>
> Sent from my iPad
>
>> On Jan 1, 2020, at 11:13 AM, 1291jim at gmail.com wrote:
>>
>> Happy New Year All,
>>
>> I have had an issue with my Eagle happen twice now.
>>
>> Issue:
>> -  Eagle loses tuning and SWR starts going crazy and jumping all over the
>> place
>> -  Will not tune with inboard or outboard tuner
>> -  Returns to normal operation after I shut in down for a while
>>
>> Background:
>> - Has only happened when I have been operating for several hours and during
>> a 20 min+ QSO, (so lots of sending) and both times on 40M
>> - Eagle felt warm but not hot
>> - Antenna is an EndFed (Alpha Antenna J-Pole Sr)
>> - Without tuning on 40M SWR is 2.6 : 1
>> - Normally tunes to 1.0 or 1.1 : 1 with outboard or internal tuner
>>
>> 1st occurrence:
>> - I had been operating for 3-4 hrs
>> - Eagle was running 100W through an MFJ Intellituner Model 993B that tuned
>> SWR to 1.1 : 1
>> - SWR started jumping all over the place
>> - MFJ could not tune it
>> - I assumed it was the MFJ Tuner, shut it all down.
>>
>> 2nd occurrence: (last night)
>> - Had been operating several hours at 100W
>> - Eagle again through MFJ Tuner when SWR started jumping all over
>> - This time I bypassed the MFJ tuner and tried to tune with the Eagles
>> internal tuner
>> - The internal tuner could not tune the antenna and SWR continued going nuts
>> through the attempted tuning process
>>
>> This morning after a rest, rig tunes FB with outboard or inboard tuner.
>>
>> Pulling it from service now.
>>
>> Any advice would be appreciated.
>>
>> HNY ES 73 DE W6JIM
>>
>>
>>
>>
>>
>>
>>
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