Thanks to all who replied. I just solved the problem with a Rohn 2 inch heavy wall galvanized inside and out M200H tube from Hill Radio. 73 ES DX, Gary -- AB9M Environment: 50 foot AGL Rohn 45G flat
His reasoning was that enough bare aluminum-to-aluminum surface area would remain that the use of the Permatex was very unlikely to negatively effect antenna performance. Anyone have an opinion on th
Sell for scrap or replace the cable (with same or better cable and component ratings). Just look at the worse case scenario if the cable breaks; loss and liability, if the cost of replacing the cable
If on or in the ground 24 or more thirty foot plus radials will make the HV-2 work really well. Another thing to consider is four 12 foot umbrella wires for top loading with weed trimmer line to exte
I have the real thing operating from my beam.... http://en.wikipedia.org/wiki/Great_Horned_Owl 73 ES DX, Gary -- AB9M http://www.bitsandpieces.com/product.asp?pn=46914&SID=0939395&EID=0939395&lm=bits
As I prepare to replace my thirty year old, tapered top, 50 foot Rohn 45-G with a new 50 foot flat top, Im looking for suggestions on the rotor loop configuration; A TH-7 with BN-4000, mounted on Roh
Having found a TH-4 back in 1975, I bought it and worked a lot of DX with it until I replaced it with a new TH-7 right after they came out. The TH-4 did have a close spaced reflector without traps an
Electric fence in the country / aquarium water heater in the city or suburb. Sometimes heat tape. 73 ES DX, Gary -- AB9M I have a mobile RFI setup and monitor pole noise from 300-520 Mhz in AM on a Y
Has anyone in this group tried three quarter inch type NM non-metallic liquid-tight conduit to protect the RG-213 rotor loop from abrasion when the RG-213 is tied to one leg of the tower and then wou
Foil back sheet rock is also an option. I know it adds to the attenuation of UHF, 800 MHz, Wi-Fi, cell-phone ingress / egress, so it should work too. 73 ES DX, Gary -- AB9M Aluminum foil backed foam
We used to do something similar with commercial radios by putting a gain antenna outside and high use low loss transmission line to basement and interior spaces of large buildings where quarter wave
I've always had better luck using a center punch (and hammer) on the nut flat (backed with something heavy). Heat and cool cycles help along with the BFW. 73 ES DX, Gary -- AB9M _____________________
Aluminum ground lug on the tower leg bolt, #4 or #6 solid copper to the ground rod and a #4 or #6 to the MDP or system ground IAW with NEC. All grounds must be bonded together. 73 ES DX, Gary -- AB9M
National Electrical Code 250.94 will apply to the Rohn Tower and grounding. A minimum of #6 copper is required for bonding the tower and ground to the electrical service ground. With the galvanized t
When I was working in telecommunications for a major insurance group, we had both ground rings around multiple building complexes, air terminals tied to building steel at 197 feet AGL, ground busses
Regarding the ROHN manual comments and the original post. The 45-G bottom receiving female pieces for bolting the sections together had significant drips or blobs of galvanizing which prevented the s
On a Rohn 45-G flat top I used six feet of Non-Metallic Conduit which had an internal diameter large enough to pass a PL-259 and ten feet of RG-213/U. The guys on the tower dressed the cable down the
I have recently replaced my 30 year old TH-7 on 50 feet of Rohn 45G with a new TH-7 on new Rohn 45G. The boom length and maximum element of the TH-11 and the TH-7 are the same; these are big antennas
The TH-11 appears to me to be a WARC enabled TH-7.... the log cell is just 20, 17, 15, 12, and 10 meter driven elements fed in log periodic fashion and with yagi type reflectors and directors on a 24