[1000mp] RE: Tuner quirk

[John E Bastin, K8AJS]

At 7:44 PM -0800 12/31/01, Ralph Parker wrote:
>
> >My Mark V so far has been perfect. Yesterday I stuck a B&K TVI filter
>>in line. Now the tuner doesn't want to tune 160, 80/75, and 10 meters.
>
>Looks like only one guy got it right - it's not a tuner quirk, it's a
>filter quirk - they have to see 50 ohms, and obviously the antenna isn't.
>The impedance presented to the xcvr is no longer what it was expecting.
>The Mark V is still perfect.
>
>Put the tuner between the filter and the antenna. All of this is covered in
>any ARRL handbook - another reason everyone should have one (and read it)!

This is a good suggestion, and works for an external tuner. It's not possible, related to the internal auto tuner, though.

With that in mind, the solution may be to turn off the internal tuner and resort to an external antenna tuner, and put the low-pass filter between the transmitter and the tuner. That's the way my station is set up for the antennas that need the external tuner, and it seems to work fine.

Hope this helps.

73,
-- 
J o h n   B a s t i n           K 8 A J S
jbastin@sssnet.com         K8AJS@arrl.net
    http://www.geocities.com/~tarquin