[TenTec] Stupid Tech Question On Hookup Of Station

[Ken Brown]

Hi Dan,

It is likely that it will not make a difference, however having the test 
gear between the transmitter and the impedance matching  unit would be 
my preference. Here's why: When you have your impedance matching device 
(Antenna Tuner) adjusted properly, the line between the transmitter and 
the impedance matcher has low SWR and the RF voltage and current 
maximums are easy to predict. All you need to know is your transmitter 
maximum power output and Ohm's law. Whatever way those two instruments 
sample some of the RF on the line, it will work uniformly regardless of 
the antenna you are feeding. If on the other hand you have the 
instruments on the antenna side of the impedance mathing device, you 
could have a very high RF voltage, or a very high current at the 
instument RF power sampling point. This could possible blow up the front 
end circuitry in the frequency counter. Monitor scopes sometimes have no 
active electronics between the RF sample point and the CRT deflection 
plates, so less chance of smoking anything there. If there are active 
circuits or small passive parts they could get toasty in some 
situations. I don't know what kind of scope you have, I only guess that 
is is a CRT based system and not some newfangled digital abomination.

DE N6KB

t theOTAKEBI at aol.com wrote:

>Friends on the list.
>I have my monitor scope and freq. counter hooked up after my Antenna Tuner.
>Should they remain like that or should they be placed before the tuner and 
>make the antenna tuner the last thing before the antenna?
>Does it make a difference?
>Will be very interested in answers and the reasons for them.
>Dan N4VET
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