I forgot, some towers are grounded at the base and you don’t need anything to isolate your jump onto the tower. There are 1/4 wave, 1/2 shunt fed (very hot at the ground) and 5/8 wave.
From: Matt Hoppes Sent: Saturday, August 25, 2018 10:07 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] AM Tower So was this Tower hot? Or just had radials on it? On Aug 25, 2018, at 11:19, Nate Burke <[email protected]> wrote: Not that I recall. This picture is from when the tower was no longer hot, but our cables are still there. You can see the heliax coming down the right hand side on the insulated standoffs. Our cat5 was attached to that and then drooped into the shack with the coax. The bundle of cables on the left are new cables now that the tower is not hot. The AM Feed/tower lights are in the solid rod at the bottom of the tower. This was a 1/4 wave stub tower, so at ~100 feet the insulated standoffs stopped and everything was just attached to the tower legs from there up. On 8/25/2018 7:23 AM, Matt Hoppes wrote: You didn’t have to isolate your cat5 when it left the Tower into the shack? On Aug 25, 2018, at 00:03, Nate Burke <[email protected]> wrote: Years ago we were on a hot AM tower until the station removed the AM Transmitter. I don't remember having to do anything special with our cables coming down the tower, other than they were insulated from the tower itself. In our case there was a large Coax running up to an FM Antenna that was on insulated standoffs, we attached our cables to that, and just followed the coax into the shack. We did pay to have the tower checked for tuning before we hung our equipment. Good thing, the tower was out of whack before we started, so they couldn't blame it on us. On 8/24/2018 9:21 PM, Matt Hoppes wrote: Probably iso coupler On Aug 24, 2018, at 21:36, Chuck McCown <[email protected]> wrote: You thread the cable through the copper tubes that are part of the load coil network. The DC/AC choke circuits are made to power the tower light circuits. Not sure who makes them. Have seen them at all the AM stations. From: Matt Hoppes Sent: Friday, August 24, 2018 7:05 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] AM Tower Explaining snaking? Who makes a DC isolation unit? On Aug 24, 2018, at 18:53, Chuck McCown <[email protected]> wrote: Standard isolation unit. You can also snake the DC through their feed inductor. Sent from my iPhone On Aug 24, 2018, at 4:48 PM, Matt Hoppes <[email protected]> wrote: Let’s not get into the weeds of putting stuff on an AM Tower. If I’m crazy enough to try it.... What’s the best way to isolate DC coming from the shed to the Tower? Every thing else will be Tower mounted and bonded to the Tower. -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com ---------------------------------------------------------------------- -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com <IMG_2456.jpg> -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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