Two more alternatives for coax, wire, UV resistant rope: The Wireman or visit www.thewireman.com (South Carolina) Great quality ; Press knows coax and cable. Another source is www.davisrf.com (Near B
Marc; I was in your position about 11 years ago and ordered a 4:1 Balun from www.radioworks.com in Virginia. It worked extremely well on my KT-34XA. Also check www.wireman.com for their line of 4:1 B
Mike, Check www.burghardt-amateur.com Load "View Catalog", which is lengthy first time, and scroll to Rohn. In the Printed Catalog just received, US$4555. which does not include freight. Those two ar
Colin; Check MFJ web site to see if the manual is available. GL- Jim, K4SQR On Sun, 12 Aug 2001 20:52:40 +0100 "Colin" <colinjbrown@btinternet.com> writes: Jim Miller, K4SQR http://www.comteksystems.
For photos and construction details using 4" + 3" irrigation aluminum tubing for his 80M 4-Square, see Steve Kelly,K7EM full details at http://www.bctonline.com/users/skelly/4square/4square.html Stev
Eric, K8CCA; See the FAQ section at www.hy-gain.com for suggested stacking distances. GL, Jim Miller, K4SQR http://www.comteksystems.com 4-Square Experts, Stack Yagi & Remote Antenna Switching System
Hopefully the Stacking separation distances and other noteworthy FAQ's will be added to the new Hy-Gain website soon. When I gave the referral, I was unaware Hy-Gain's newly designed web site had del
Hi Bill; If your're using 1/4w 75 ohm lines to the towers from your coupler, try three top-loading wires, each at 20 feet initially on each tower, to retain your 75 ohm lines. If this is not satisfac
Patrick; Using vertical formula of 234/7.000=33.4 feet or 33 feet 4 & 5/8 inches. 33'4" will certainly be a good starting point for 7.0. Starting with 2" OD and going up the chart of smaller sizes, s
Hi Paul, N0AH; You are correct; the Comtek Systems 8 position RCAS-8 Remote Antenna Switch requires a 6 conductor control cable, and a "borrowed feature since 1995 in the ACB-4 series 4-square " are
Ken; Comtek carries a 60-hole SRR-1Stainless steel radial ring with stainless hardware for 4-Square or single vertical installations. See www.comteksystems.com & click on SRR-1. 73, Jim Miller, K4SQR
Check www.randl.com R & L Electronics in HAMilton, OH Tel. 800-221-7735 Their catalog lists H-30; H-40, H-50, H-70 foot Rohn models. I beleive they ship via truck frt. I have an H-50 that was given t
Ron; First, compare your county's wind load rating zone, ie 70 MPH etc.. Comtek 4-Square users have modified Hy-Gain Hy-Towers (24') by stripping all stubs off and tapering the aluminum "stinger" so
Dan, W0VD; See http://w4an.contesting.com/80.htm for photos of Bill's Rohn 25G/mast/Comtek 80m 4-square. Many Comtek 80 meter 4-Square customers have used 24 feet of Rohn HDBX tower sections supporti
Dan & other readers; Corrected URL below, with apologies. The "m" was omitted in first post. 73, Jim, K4SQR ask base on -- FAQ on WWW: http://www.contesting.com/FAQ/towertalk Submissions: towertalk@c
On Friday, Dec. 3, 1999, three men were on a 1500 foot tower owned by station WFMX, about 60 miles North of Charlotte, NC. They were painting the tower when for some as yet unknown reason, they fell
David; Rohn Catalog states the pushup masts are not for Amateur or CB use. 73, Jim Miller, K4SQR A 4-Square Station -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@c
Three inch (3") od irrigation tubing is the only method of covering 75/80 meters without adjustments. 127 feet of Rohn 20/25G tower will cover 160 meters. Two of the companys listed make "monoband" v
Ian; I successfully phased four (4) of the MFJ-1792 verticals as an 80 meter 4-Square with 40-50 radials each 60'-70' long. There is no adjustment on 40, it is a 1/4 wave on 7 MHz. I trimmed a few in
K3LC has several interesting articles on wire arrays and elevated radials, and N6BV describes the record setting all- vertical use by 6Y2A in CQ WW CW last year. Very interesting reading overall. Enj