[TenTec] Model 1225 SWR and Wattmeter Kit

[Bob McGraw - K4TAX]

For me and my station in every day operation the Daiwa CN-801HP serves me 
well.

To add to that if you wish, a Bird 43P {clean but used late model $375} add 
a 250 watt HF slug {250H @ $175 new} and add 2500 watt HF slug {2500H @$255 
new} is all one needs.  Plus if one drops it, it doesn't break.

I agree with Carl and Jim that the LP-100 will be more accurate over much 
wider load impedances.  But for ham use you just need to know the needle 
should move more forward with more power and should go to near zero with SWR 
value of near 1:1 and a 50 match.  For ham applications an instrument with a 
10% full scale accuracy is all that is needed.

>From my take, put 10 watt meters in series between a transmitter and a dummy 
load and you'll have 11 results.  Those would yield 10 meter indications and 
one unknown where as the unknown value is correct.

73
Bob, K4TAX


----- Original Message ----- 
From: "K8JHR" <jrichards at k8jhr.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Monday, July 21, 2014 10:27 PM
Subject: Re: [TenTec] Model 1225 SWR and Wattmeter Kit


> Hmmm... Gee Bob, now I am worried... there is no needle!       ;-)
>
> I acknowledge what Carl said about accuracy and impedance mismatch... but 
> as nearly all my antennas present a 1:5 or better SWR and are matched as 
> closely to 50 ohms as possible, and I use very heavy duty coax on very 
> short runs, I figured I would not see much benefit from a lab grade 
> instrument - besides, a lab grade meter would also be subject to the same 
> factors as any other meter placed in the same place under the same 
> circumstances, right?
>
> Would I really benefit from spending more on the LP-100?  That is the real 
> question.  Would it really be worth twice the cost?   What would I do with 
> the more accurate information it provides?  Do I really need more than a 
> close approximation?  If so,  what would it do for me?
>
> -------------------  JHR -------------------
>
>
>
> On 7/21/2014 10:52 PM, Bob McGraw - K4TAX wrote:
>> If it moves up scale off of 0 you have WATTS.   If it moves further up
>> scale you have MORE WATTS.    Then when the needle stops and just bends
>> at the top you have TOO MANY WATTS.   I think that the way it works.
>>
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