RF Applications P2000CW
----- Original Message ----- 
From: "Justin Mann" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, January 02, 2012 10:41 AM
Subject: Re: More power output readings--now doubting accuracy of LDG TW1


> How are you checking per output without tw1
>
> Sent from my iPhone
>
> On Jan 2, 2012, at 9:37 AM, Steve <[log in to unmask]> wrote:
>
>> Tom,
>>
>> First, I think others have indicated that the TW1 isn't the most accurate
>> thing around.  I don't know that the internal meter in the 590S will be 
>> any
>> more accurate, but it can't be less.  I don't own a TW-1 so I can't speak 
>> as
>> to whether there is any facility to adjust it.  As long as you are into
>> intellectual pursuits, why not borrow somebody's Bird Wattmeter, with the
>> proper element installed and take some measurements compared to your TW1.
>>
>> Second, I've noticed on my TS-2000, and I assume that the 590S will be
>> similar, that there are losses when using the internal antenna tuner.  My
>> relative power is down about 14-20 watts when using the internal tuner
>> versus using an external tuner.  I think Bob, K8LR has had similar 
>> results.
>>
>> Steve, K8SP
>> ----- Original Message ----- 
>> From: "Tom Behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Sunday, January 01, 2012 2:45 PM
>> Subject: More power output readings--now doubting accuracy of LDG TW1
>>
>>
>>> Hi, folks.
>>>
>>> I know, I know, it's just the professor in me, but this output power 
>>> issue
>>> I've been dealing with is intellectually interesting, if nothing else. 
>>> I
>>> fully realize that 20 watts either way isn't going to make a difference 
>>> in
>>> terms of who hears me, how well they hear me, etc., but I have to report
>>> on
>>> my latest set of output power readings this morning.
>>>
>>> First of all, When I use my Astron RS35 power supply, and take output
>>> power
>>> readings with the watt meter on the TS590, things now seem to be pretty
>>> stable at 100 watts output on either a resonant frequency for one of my
>>> antennas, or when using the TS590 auto-tuner.  Obviously, the resonant
>>> frequency readings are going to be the  most revealing, so those are the
>>> ones I have the most faith in.
>>>
>>> What I still don't understand is why my LDG TW1 seems to be about 20 
>>> watts
>>> off with its output power readings.  For now, I'm going to go with the
>>> readings the radio gives me, since the rig is what needs to be kept 
>>> happy.
>>>
>>> Between Mike Duke  and Steve Forst, I do have some good instructions if 
>>> I
>>> ever want to tweak the output voltage on the Astron RS35, but I think 
>>> I'll
>>> hold off on doing that for a while until I see if things remain as 
>>> stable
>>> as
>>> they are right now.
>>>
>>> Thanks to all for your your continued interest in, and help with this
>>> issue.
>>>
>>> 73 from Tom Behler: KB8TYJ