a lot of the popular antennas, cobra Ultralite and the like aren't close 
enough in swr on 60 meters for an internal antenna tuner to work to tune it 
so it's not the tuner in a lot of cases, it's the antenna.
----- Original Message ----- 
From: "Butch Bussen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, September 26, 2010 8:54 PM
Subject: Re: Vertical antennas


> Well, I wouldn't say the tuner works everywhere.  It won't tune some
> antennas I've tried it on on 60 meters.  The problem is that the tuner
> doesn't switch for that band, it knows 80 meter band and the 40 meter
> band, but not 60.  It will tune, but it is much more of a problem on 60
> meters.  Another test you can do is as you tune across a band edge is to
> listen to the noise and see when the filtering and tuner is switched.
> If you move ten kc, over the boundary and you hear a relay click as
> bandpass filters and tuners are changed and the noise drops
> significantly, it is a good clue is isn't optimized for that frequency.
>
>
> 73
> Butch Bussen
> wa0vjr
> open Node 3148
> Las Vegas
>
>
> On Sun, 26 Sep 2010, colin McDonald wrote:
>
>> no, removing r53 completely opens up tx from 1.75MHZ to 30MHZ, no gaps.
>> full 100W tx power output, and the tuner works everywhere.
>> its a modern CPU controlled rig, so you don't run into major tuning 
>> issues
>> as you alter the transmit frequency outside of specified areas like what
>> used to happen to older rigs.
>> 73
>> Colin, V A6BKX
>> ----- Original Message -----
>> From: "Tom Brennan" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Sunday, September 26, 2010 3:34 PM
>> Subject: Re: Vertical antennas
>>
>>
>>> It extends a few bands below 30m a bit for MARS use but nothing in
>>> commercial
>>> bands except in the 8-9 meg range, I think.
>>>
>>> Tom
>>>
>>>
>>> Tom Brennan  KD5VIJ, CCC-A/SLP
>>> web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html
>>
>>