FYI, the term PARASLEEVE was coined in 1982 by Hy-Gain for the Explorer-14. I am not aware of it's use by FORCE 12. The term "Open-sleeve dipole" is more generic and should be used unless specificall
A spacing of 10 feet should work. You could get as close as 5 feet, but there may be some interaction between the radials of the R7 and the TH7DX. This probably won't affect the TH7DX any, but it may
I recommend the following things to prevent water-related problems: 1. Make sure that all trap drain holes are pointing down. 2. Make sure that the outboard trap-cap on each 15m trap has a 1/4" drain
I'm hoping that I'll be forgiven for posting something that has nothing to do with towers but, occassionally, a question needs an answer and one is not subscribed to an appropriate reflector. In a nu
Bryan, I agree with what LB told you about the different programs. My favorite is AO v. 6.5 from Brian K6STI. It is Mininec-based, so different wire diameters and tapering is not a problem. It also h
The ACES archives have some EZNEC files. These are at http://www.qsl.net/wb6tpu/swindex.html. Look at the bottom of the list. Also, these files are in the alternate NEC archive locations too. (ftp.fu
We received an email from Mike Goldwater, Barry's son, concerning Barry's Hy-Gain RP-75H rotating pole. Barry had an agreement with his neighbors, that upon his demise, the antennas and rotating pole
Go to Yahoo and TYPE in DXSUMMIT and you might find what you want. Roger, KO4O -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests
There was a TH6-DX in 1965. It was designed by Howie Pabian at Hy-Gain Electronics. A few years later it became the TH6DXX, after the new boom-to-mast bracket was added. BTW, the TH7DX (designed in 1
Thanks for the cap! 73 Roger WB0DGF -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems
The power rating of coax varies approximately with the square root of frequency ( 2 X freq power, is divided by 1.414; 4 x freq, power is divided by 2). The power loss is converted to heat so the act
To All Trying to decide between C-31XR and 5BA. Does anyone have any info or experience with 5BA? Roger N3RC -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesti
Since this is supposed to be about radiowaves, I have this question along the lines of those below, but with an electromagnetic twist, if you will: "Light travels much faster than sound...do you supp
Likey your neighbor in Fallbrook is watching San Deigo Channel 39 TV and is experiencing interference from a new digital TV station on Channel 39 in Corona, CA. 73 Roger WB0DGF -- FAQ on WWW: http://
I don't have a scanner to transmit a drawing but it's pretty simple to explain. Imagine a three element Yagi with one side of the driven element sawed off about 3ft from the boom. The haul-up line at
GUYS: I PUT THAT GROWTH HORMONE ON MY GRASS IN THE FALL SO IT GETS TALLER. WHERE DO YOU BUY THIS STUFF FOR ONE'S TOWER? LEE Just a note from one visionary to another!!:-) ISO 9002 CERTIFIED...Y2K..CO
I had an aluminum mast up for several years in a Rohn 25 "snorkle" type top section. Upon removal, I found that the aluminum was heavily scored where it rubbed against the steel. The use of an alumin
I do not think that Mr. Onnigian is Kurt N. Sterba. If I recall, he was the President (or associated with) of the antenna company, "Ham-Pro Antennas" in Sacramento, CA. I still have some literature f
I am about to put up my stacked yagis for 2m and 70 cm. On the 2 m side I will have 4 2MXP20 yagis (22 foot booms) stacked at 12 foot intervals. I will be using the usual plate to attach the 3 inch d
Lyn: There are many different grades of SS. I use an dinosaur method byf using a magnet to weed out the low grade from the high grades of SS. However, going to a boat outlet where their SS hardware i