WRQX740 Posted January 28, 2023 Report Share Posted January 28, 2023 New to GMRS and am looking to put up a base station Antenna on my roof. I have a TV antenna on a pole strapped to the chimney. Can I put the vertical base antenna on the same pole above the TV antenna? If not, how far away from the TV antenna should I mount the GMRS antenna? And lastly if I need to mount the antenna elsewhere on the roof, any suggestions for a good strong mount that attaches to the face of the eves to attach a vertical pole? I have a KG-1000 I'm going to use as the base station and am ready to go as soon as the location of the antenna is sorted. I appreciate any help with this. Brian in Riverside CA Quote Link to comment Share on other sites More sharing options...
bd348 Posted January 28, 2023 Report Share Posted January 28, 2023 The attic may do. Quote Link to comment Share on other sites More sharing options...
Sshannon Posted January 28, 2023 Report Share Posted January 28, 2023 5 hours ago, WRQX740 said: New to GMRS and am looking to put up a base station Antenna on my roof. I have a TV antenna on a pole strapped to the chimney. Can I put the vertical base antenna on the same pole above the TV antenna? If not, how far away from the TV antenna should I mount the GMRS antenna? And lastly if I need to mount the antenna elsewhere on the roof, any suggestions for a good strong mount that attaches to the face of the eves to attach a vertical pole? I have a KG-1000 I'm going to use as the base station and am ready to go as soon as the location of the antenna is sorted. I appreciate any help with this. Brian in Riverside CA Yes, you can put the vertical base antenna on the same pole as your TV antenna, especially if you have several vertical feet between them. Your TV antenna is probably a log periodic antenna, which is directional and covers a different band. I would try that first. If you don’t watch TV while you’re transmitting you probably won’t even know it. If you do transmit while someone is watching TV, run some tests to see if they get any interference. Make sure the mast is grounded. If the attic is much easier try that, but getting it higher makes more difference than having more power. WRUU653 and Sab02r 2 Quote Link to comment Share on other sites More sharing options...
WRQX740 Posted January 28, 2023 Author Report Share Posted January 28, 2023 4 hours ago, Sshannon said: Yes, you can put the vertical base antenna on the same pole as your TV antenna, especially if you have several vertical feet between them. Your TV antenna is probably a log periodic antenna, which is directional and covers a different band. I would try that first. If you don’t watch TV while you’re transmitting you probably won’t even know it. If you do transmit while someone is watching TV, run some tests to see if they get any interference. Make sure the mast is grounded. If the attic is much easier try that, but getting it higher makes more difference than having more power. Thank you very much for that. It will save me other hardware and a lot of Coax. I'll make sure there is at least 4 feet between them and give it a shot. Sshannon 1 Quote Link to comment Share on other sites More sharing options...
Sshannon Posted January 28, 2023 Report Share Posted January 28, 2023 18 minutes ago, WRQX740 said: Thank you very much for that. It will save me other hardware and a lot of Coax. I'll make sure there is at least 4 feet between them and give it a shot. Let us know how it works out, please. Quote Link to comment Share on other sites More sharing options...
KAF6045 Posted January 28, 2023 Report Share Posted January 28, 2023 13 hours ago, WRQX740 said: New to GMRS and am looking to put up a base station Antenna on my roof. I have a TV antenna on a pole strapped to the chimney. Can I put the vertical base antenna on the same pole above the TV antenna? If not, how far away from the TV antenna should I mount the GMRS antenna? And lastly if I need to mount the antenna elsewhere on the roof, any suggestions for a good strong mount that attaches to the face of the eves to attach a vertical pole? I have a KG-1000 I'm going to use as the base station and am ready to go as soon as the location of the antenna is sorted. I appreciate any help with this. Brian in Riverside CA Eaves... not so much. But END of building. https://mfjenterprises.com/collections/all/products/eve-48 (they may call it an "eave" mount, but it really fits on the end of the building with the upper bracket just under the ^ of the roof peak, and the longer bracket a foot or more below it) https://mfjenterprises.com/products/wmd-12 (if you have very narrow eaves, this one may extend enough to let a mast pass the eave, otherwise another end-of-building fit) I have two of the first -- one on end of house, other on end of garage, with a 40/20/10/6m OCFD suspended between them (the OCFD needs replacement, a few windy winters have stretched it to where the SWR is below the amateur bands). The second I have on the other end of the garage, supporting a 2m/70cm ground-plane vertical. Quote Link to comment Share on other sites More sharing options...
Sshannon Posted January 28, 2023 Report Share Posted January 28, 2023 Rohm makes wall mount mast brackets that extend out to 24 inches from the wall. https://www.dxengineering.com/search/part-type/mast-wall-brackets They should work on either sidewall or gable ends. They also make an eave mount bracket that appears on the same page: Hy-Gain EVE-48 Eave Mount Brackets EVE48 kmcdonaugh 1 Quote Link to comment Share on other sites More sharing options...
kmcdonaugh Posted January 29, 2023 Report Share Posted January 29, 2023 I have actually used these on Oil rigs for their LTE connections with the Rohn 20' extendable poles Sshannon 1 Quote Link to comment Share on other sites More sharing options...
Sshannon Posted January 29, 2023 Report Share Posted January 29, 2023 3 minutes ago, kmcdonaugh said: I have actually used these on Oil rigs for their LTE connections with the Rohn 20' extendable poles How are their extendable masts? Quote Link to comment Share on other sites More sharing options...
MichaelLAX Posted January 29, 2023 Report Share Posted January 29, 2023 12 hours ago, WRQX740 said: Thank you very much for that. It will save me other hardware and a lot of Coax. I'll make sure there is at least 4 feet between them and give it a shot. Why would it save you a lot of Coax? Quote Link to comment Share on other sites More sharing options...
nokones Posted January 29, 2023 Report Share Posted January 29, 2023 I have a Laird 5 dB Omni hanging on the side of my garage connected to a 50 Watt Repeater Station using LMR400 Coax with a lightning Arrestor grounded to earth ground at the electrical panel. wrfc, WRUU653, gortex2 and 1 other 4 Quote Link to comment Share on other sites More sharing options...
kmcdonaugh Posted January 30, 2023 Report Share Posted January 30, 2023 21 hours ago, Sshannon said: How are their extendable masts? Out of all the masts we used, those were the ones a preferred. Lightweight, durable so they held up in high winds and easy to take down/put up for transportability. We would mount them on trailers and then just lower them for transport and raise them again at the new location. Sshannon 1 Quote Link to comment Share on other sites More sharing options...
PartsMan Posted January 31, 2023 Report Share Posted January 31, 2023 On 1/28/2023 at 1:38 AM, WRQX740 said: Can I put the vertical base antenna on the same pole above the TV antenna? This works fine for me. Not even a flicker on the TV when I key up my 20w base. Sshannon and Sab02r 2 Quote Link to comment Share on other sites More sharing options...
tcp2525 Posted January 31, 2023 Report Share Posted January 31, 2023 Here's a pic of the old overcrowded tower. The GMRS antenna, a Tram 1486-B, is on the left rear side standoff. It's time to get the second tower up if ever I get off my lazy butt to do it. One day it will go up. Nothing worse than leaving 120' of tower unused and unloved. Sshannon, Sab02r and WRUU653 3 Quote Link to comment Share on other sites More sharing options...
Bamishere Posted July 1, 2023 Report Share Posted July 1, 2023 What you cut 464,462, 465 or what for GMRS Quote Link to comment Share on other sites More sharing options...
BoxCar Posted July 2, 2023 Report Share Posted July 2, 2023 Many antennas come with cutting guides, just remember to check and measure twice before cutting. You really need an antenna analyzer to tell you where the antenna is tuned before making any changes. An SWR meter isn't an analyzer. Quote Link to comment Share on other sites More sharing options...
wrfc Posted July 2, 2023 Report Share Posted July 2, 2023 About a foot above your TV antenna will work fine for your radio . Thats how I have mine for the last 5 years now . Quote Link to comment Share on other sites More sharing options...
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