I find that my MFJ analyzer is in complete agreement with using my radio and
it's built in SWR meter.
All of my antennas have random lengths of coax. I have never had to adjust
coax lengths.
However, on low bands ( 40 thru 160 ) the antennas, being mechanically
short, have narrow bandwidths. So, I use an MFJ-998 autotuner on 40 and 80
to widen the bandwidth. On 160 I can get 50 KHz width with the tuner.
Best Regards
Dan Schaaf
K3ZXL www.k3zxl.com "In the Beginning, there was Spark Gap"
===============================
NOBSKA
www.nobska.net
===============================
Cape Cod Instruments
www.oceanbiz.net
===============================
----- Original Message -----
From: "Kelley" <kshaddrick@jetup.net>
To: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Sent: Wednesday, January 20, 2010 8:54 PM
Subject: Re: [TowerTalk] Hustler 5BTV Problem
>I can certainly add 10 feet to the coax, but, as I should have mentioned
> up front, the SWR measurements were taken using an MFJ analyzer
> connected to the antenna with about 6 feet of coax.
>
> Kelley - W0RK
>
> On 1/20/2010 7:07 PM, Mike Murphy wrote:
>> Just a guess, but your 60 feet of coax is suspect here. Try adding 5 or
>> 10 feet of coax and I bet your problems go away.
>>
>> Good Luck!
>>
>> __________________________
>>
>>
>> Michael Murphy - KD8OK
>>
>>
>> kd8ok@yahoo.com
>> __________________________
>>
>>
>>
>>
>> ________________________________
>> From: Kelley<kshaddrick@jetup.net>
>> To: towertalk@contesting.com
>> Sent: Wed, January 20, 2010 6:47:32 PM
>> Subject: [TowerTalk] Hustler 5BTV Problem
>>
>> I've been working with a 5BTV antenna for about two weeks now. I've got
>> good SWR readings on 10m, 15m and 80m. Higher but usable readings on
>> 20m. However, I can't get anything under 2.0:1 on 40m. The antenna is
>> ground mounted with 20 25' radials. It's fed with about 60' of coax.
>>
>> I've tried the normal tuning as well as adjusting the traps. Nothing
>> seems to bring the SWR on 40m down to something usable.
>>
>> Anyone have any ideas I can try?
>>
>> Kelley - W0RK
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>>
>>
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com
>> Version: 8.5.432 / Virus Database: 271.1.1/2634 - Release Date: 01/20/10
>> 09:12:00
>>
>>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|