[TowerTalk] TH11DX / DIS72
K8RI on TowerTalk
K8RI-on-TowerTalk at tm.net
Thu Aug 24 03:35:36 EDT 2006
> But Gavin really seems to need helping, only thing is, I dont know or
> have ever heard of this DIS72, but with all this available talent pool,
> Gavin will get some good answers... mac/mc w5mc
According to the Hy-Gain site the Dis72 is a 7 Mhz antenna with two elements
using a hairpin matching system. Hence the 72. They don't give the weight,
but the turning radius is 25' and the Effective moment is 1412 ft/lb. So
1412/25 gives a weight of about 56 1/2 pounds.
It's relatively small for a 40 meter antenna with (from their manual) a max
element length of a tad over 44', Boom length of 22' of 2" tubing. 6 sq ft
rated for 80 MPH wind survival. Wind load at 80 MPH is a hefty 154 ft
Gain is listed at 4.3 dBd with a f/b of 15 db.
Cost is about $650
It looks like an interesting limited space antenna for 40.
I'd like to get 40, 20, 15, and 10 on one boom with at least 2 if not 3
elements on 40. Of course being mixed in like that they'd be well short of
I'd stick one under my tri-bander, but with the trip-bander at 100, 7L on
six at 115 and the 144/440 arrays at 130 I already beat a TB-3 to pieces in
less than 6 years. I'd have to use spacing much closer than I'd like even
after removing the 144/440 arrays.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com (Use return address from home page)
> Located 46 miles due North of the Alamo, and 121 miles due South of the
> Western White House. see my website at www.collinsandharrisradios.com
> ----- Original Message -----
> From: "Dick Flanagan K7VC" <dick at twohams.com>
> To: "Towertalk Reflector" <towertalk at contesting.com>
> Sent: Wednesday, August 23, 2006 7:33 PM
> Subject: [TowerTalk] TH11DX / DIS72
>>I received the following message today. Could someone on the reflector
>> respond to Gavin? I know nothing about the DIS72 antenna he is referring
>> If someone could, please respond directly to him at gwerner at webb.co.za as
>> am sure he is not a member of this reflector. Alternatively, I will try
>> forward any responses here directly to him.
>> Thanks in advance from Gavin.
>> 73, Dick K7VC
>> ---- Begin forwarded message ----
>> From: "Gavin Werner" <gwerner at webb.co.za>
>> To: <k7vc at arrl.org>
>> Subject: TH11DX / DIS72
>> Date: Wed, 23 Aug 2006 10:50:38 +0200
>> HI DICK
>> NAME HERE IS GAVIN MY CALL ZS6GAV I WAS ZR6GE BUT HAVE UPGRADED AND MY
>> DICKIE ZS6DTS
>> OK SO REASON FOR THIS MAIL TO YOU, NUMBER ONE I HAVE READ THIS WEBB PAGE
>> AND HEY YOU GUY,S
>> HAVE REALLY GO EQUIPMENT AT YOUR HANDS, BACK HERE IN AFRICA ANTENNA,S AND
>> QUALITY RADIO,S JUST
>> HARD TO COME BY.I AM CURRENTLY USING A HOME MADE TH6 ( MADE UP OF ABOUT 6
>> DIFFERENT ANTENNA PARTS )JUST CRAZY!!!!!!!!!!
>> SECOND I AM IN NEED OF GOOD ADVICE ON THE TH11DX AS I HAVE MANAGED TO
>> IMPORT THIS ANTENNA AT GREAT COSTS.PLEASE COULD YOU HELP WITH ANY TIPS OR
>> IDEA,S ...
>> I PLAN TO LIFT THIS ANTENNA UP WITH ROPES AND A JINT POLE, BUT THE
>> IS ONCE I HAVE IT UP IN THE AIR TO BRING IT DOWN HEY MAN
>> WHAT A JOB, SO AGAIN ANY IDEA,S WILL HELP..
>> DICK PLEASE MY ENGLISH IS NOT SO HOT AS I SPEAK SEVEN LANGUAGES AND TO
>> WRITE LETTERS JUST ONE BIG PROBLEM AS I MUST
>> THINK ENGLISH ONLY..
>> ALSO IF YOU HAVE IDEAS ON THE DIS-72 I WILL BE VERY HAPPY
>> JUST A LITTLE BACK GROUND ON MY STATION
>> TOWER IS 70 FEET HIGH THIS I WANT TO PUT TH11DX ON , SO I CAN NOT GO
>> THAN THAT THE LOCAL COUNCIL WILL NOT APPROVE
>> I USE THE 7/8 CABLE SO YES THIS IS OVER KILL BUT I WAS LUCK THE LOCAL
>> PHONE COMPANY SELL ME SOME CABLE AT VERY GOOD PRICE
>> I HAVE TWO TOWERS IN MY HOUSE ONE FOR TH11DX AND ONE FOR DIS72 TWO
>> THIS WILL ONLY BE UP 50 FEET
>> SO I SAVE MONEY I WANT TO BUY THE IC756PROIII AND THEN ONE DAY I WILL
>> BUY THE IS 746PRO
>> PLEASE SIR I ASK YOU TO TAKE THE TIME TO READ THIS LITTLE LETTER TO HELP
>> WITH THE GOOD IDEAS
>> TANKS AND REGARDS
>> GAVIN WERNER ZS6GAV ( SORRY I AM ON THE QRZ.COM YOU LOOK ME OK )..
>> ---- End forwarded message ----
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