[TenTec] TT 238C will not tune

[Robert Mcgraw]

Wade, I fully agree.  A station must have or have available some type
antenna analyzer.  Otherwise, one is mostly "flying in the dark by the
seat of their pants".

I always use my analyzer to make all tuner adjustments, therefore  I
never use carrier to tune.  I also use a dummy load to tune the amp thus
the tuner is set correctly and the amp is tuned correctly and no signal
put on the air.

And as a courteous operator, no QRM generated.

73
Bob, K4TAX


> *When I have a problem such as this, the MFJ Analyzer comes in real
> handy.
> So much better than trying to tune up with the radio. Work your way up or
> down from a frequency that will tune well and you should find the sweet
> spot. Have you tried adding or shortening the Coax/Feed Line by a small
> amount? On one installation we had to leave an 8 foot section of RG-213
> in
> circuit to get things to match. Later the fellow raised the antenna by 20
> feet and the Coax was no longer needed. Finding the correct match can be
> daunting. Best of luck to you. 73 .....*
> *                                               Wade/KJ4WS*
>
> On Sun, Jul 28, 2013 at 12:52 AM, Richards <jrichards at k8jhr.com> wrote:
>
>>
>>
>> On 7/27/2013 7:15 PM, Bob McGraw - K4TAX wrote:
>>   Now if the inductance is maximum value then
>>
>>> it is very apparent where Z should be located, either on the input of
>>> L
>>> or the output of L.  I believe it general practice to start with
>>> maximum
>>> inductance for adjustment of any L network.
>>>
>>
>> ______________________________**_______________
>>
>>
>>         Hmmm...  so it appears the instruction manual
>>         does not describe the best approach?  I understood
>>         the user manual to say I should start with zero
>>         on the Inductor, and the Capacitor at around 2.
>>
>>         In contrast, based on your description, it appears
>>         I would be better off starting with the inductor in
>>         the middle - away from either end - and that starting
>>         there will make it more obvious what initial capacitor
>>         setting to select on the BYPASS switch.  I know that
>>         is not "maximum" - but it would assure that I started
>>         working against a substantial inductance, rather
>>         than zero.
>>
>> Or... have I misunderstood?
>>
>> ---------- Thanks - K8JHR  -----------------------
>>
>>
>>
>>
>>
>> --.
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>>
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