Like Bill said, changing the coax length does not change the swr so there
is very little "tuning" going on.
Using 1/4 wave or less will not fix the swr problem so something more is
needed.
Changing from 50 to 75 ohm coax will cause some tuning to take place. Good
luck finding a happy length though.
73,
Gerald K5GW
In a message dated 6/11/2017 7:22:17 A.M. Central Daylight Time,
donroden@hiwaay.net writes:
If you change the length of the feed coax, you have created a "coax tuner".
1/4 wave or less is all that is required.
Don W4DNR
Quoting Bill Turner <dezrat@outlook.com>:
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> On Sat, 10 Jun 2017 19:57:42 -0500, W7RY wrote:
>
>> Tried different lengths of coax between the amp and the radio and
>> still no better.
>
> REPLY:
>
> The length of coax does not affect SWR unless it is extremely long,
> where line loss comes into play. Even then, the effect is to reduce
> SWR, not increase it.
>
> It does affect the impedance the transceiver "sees", but not SWR.
>
> 73, Bill W6WRT
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|