[TowerTalk] Was "43ft Vertical Feeding Question and Balun Type"

[Greg]

Wouldn't  the relay in a meter like the LP-00 or Powermaster work for this 
by cutting the keying line to the amp when the SWR is too high?

Greg
AB7R

----- Original Message ----- 
From: "Richard Thorne" <rmthorne at suddenlink.net>
Cc: <towertalk at contesting.com>
Sent: Sunday, November 23, 2008 4:48 PM
Subject: Re: [TowerTalk] Was "43ft Vertical Feeding Question and Balun Type"


> With the CG tuner you would have to take the amp off line manually, then
> key your rig so a tune cycle would take place.  I'm sure the tuner
> instructions state to do this at low power 10-20 watts.  Most modern
> rigs reduce the power when they see a high swr, so you normally wouldn't
> have to reduce the power manually.
>
> Once the tuner is tuned you could hit the amp operate/standby switch and
> start running with high power.
>
> I would probably forget to turn the amp off in the heat of the moment, I
> would rather the tuner interrupt the ptt line so tuning is totally
> automatic.
>
> Rich - N5ZC
>
> Richards wrote:
>> I am a rookie at all this... so please be patient.   I thought the
>> instructions
>> to the tuner said you have to reduce power to the antenna-tuner and
>> tune with like only 5-10 watts of power, and then put the power back
>> up.   I guess you are saying you would have to take the amp off line
>> or tune it way low, and then tune the antenna... and then either put the
>> amp back on line, or re-tune the amp up to power each time you
>> re-tuned the antenna.
>>
>> Is there something I am missing here?
>>
>> ==============  Richards - K8JHR  ===================
>>
>> Richard Thorne wrote:
>>> The only problem I can see with this tuner is not having the ability
>>> to break the PTT line between the rig and amplifier (confirmed by
>>> Array Solutions).
>>>
>>> A high power tuner should operate like the SGC-500 or the 1500 wat
>>> MFJ auto tuner.  When a tuning cycle begins it should interrupt the
>>> ptt line to the amp so it can tune under low power, then when the
>>> tuning cycle is complete, allow the ptt line to key the amp.
>>>
>>
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