August 2014
« Jul   Sep »



The Shively 6810 FM antenna

Update, W232AL:

The news is out; this is for the new “WFAS-FM” which is actually W232AL retransmitting the WPLJ HD-2 channel.  What do they call translators these days… Metro stations?  Something like that.  Anyway, quite a bit of work went into getting this off the ground before the start of Labor Day weekend and here it is!

We are currently working on a project that involves installing a Shively 6810 FM antenna. Since few people get to see these things up close, I thought I would post a few pictures.

This particular antenna is a four bay, half wave spaced directional antenna.  It is going to be side mounted on a 430 foot tower.  To do this, we had to lower the AM skirt wires by about fifteen feet and retune the AM antenna.

This Shively antenna came in seventeen boxes with sixty four pages of assembly instructions.  There are many parts and they need to be assembled in the order specified, otherwise things get in the way.  We found that Shively provided many extra bolts, washers, O rings, etc because things get lost.  Also, all of the parasitic locations and bay orientations were clearly marked.  One thing that the tower crew said; always check the allen screws and other hardware on the elements before installing the RADOMES.

Shively 6810 installing elements

Shively 6810 installing elements

Since this is a half wave antenna, the radiating elements are 180 degrees out of phase, bay to bay.

Shively 6810 mounting brackets

Shively 6810 mounting brackets

Stainless steel tower leg mounting brackets.

Assembled element with RADOME.  This is the top bay with the gas pressure release valve

Assembled element with RADOME. This is the top bay with the gas pressure release valve

Shively 6810 top bays staged for hoist

Shively 6810 top bays staged for hoist

We hoisted two bays at a time. The top bays are ready to go up.

Shively 6810 top two bays lift

Shively 6810 top two bays lift

The bottom two bays were hoisted next.

Shively 6810 four bays installed

Shively 6810 four bays installed

This is the antenna installed, less the tuning section and parasitic elements. It is tilted off axis from the tower by design due to its highly directional nature.

The transmission line was installed and we swept the antenna. I will snap a few final pictures once the transmitter is installed, which will happen tomorrow.

Updated Pictures: Here are a few pictures of the finalized installation:

W232AL antenna, new installation on WFAS AM tower

W232AL antenna, new installation on WFAS AM tower

The fully installed antenna, tuning unit and transmission line. We did some program testing, made sure the audio sounded good, then the station was signed on. We also had to lower the AM station’s skirt a few feet and retune the ATU. Actually, the ATU needed to be reconfigured because the shut leg had been disconnected and there was a capacitor added to the circuit after the base current meter.  All of that was fixed, along with a few other things…

W232AL transmitter, a BW Broadcast TX300 V2

W232AL transmitter, a BW Broadcast TX300 V2

The W232AL transmitter is a BW Broadcast TX300 V2. These little transmitter are packed with features like a web interface, on board audio processing, etc. They are pretty neat.

Its Friday, time to go home!

It’s Friday, time to go home!

The tower crew from Northeast Towers did a great job, as they always do.

Be Sociable, Share!

8 comments to The Shively 6810 FM antenna

  • Joel

    Thanks for the great pics. Hard to realize how huge these things are when they’re way up on the tower!

  • Bill Frahm

    This IS the fun part!
    Love new stuff.

  • Ed Butler

    The Return Of WFAS FM

  • Ever been to the Factory in Maine? I have a bunch of pictures from a tour a few years ago I did.
    I should see if I can get some approved to post online sometime.

  • Paul Thurst

    I have not been to the Shively factory in Maine. I guess I need to get out of the house more often

  • tom

    Paul, please excuse the question from the non-engineer, but always curious guy! Most translators I’ve seen are using a single bay or maybe 2 bay antenna. Why is this one a 4-bay? For the directional signal requirements?

  • Paul Schminke

    Hey Paul,

    Long time reader here. I always enjoy your posts.

    I’m facing a similar project here in Phoenix at the moment and I’m curious if you can elaborate a bit on how the translator is fed? I’m pretty sure to be 100% legal the translator would need to be fed off air from the HD-2, but it seems that in practice no one is really doing it that way. I see the Intraplex IP Link in your photos, is that your STL for the translator?

    Curious as to your take on the scenario.

    Thank you very much!

    Paul Schminke

  • Paul Thurst

    Hey Paul, to answer your question; the translator is fed directly from the Gates IP link. The HD2 receiver is there as a backup. We found there is too much delay in the HD2 signal and the direct link sounds better. There is a provision in the FCC rules for direct feeding a translator, but I cannot think of the rule off the top of my head.

Leave a Reply




You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>


A pessimist sees the glass as half empty. An optimist sees the glass as half full. The engineer sees the glass as twice the size it needs to be.

Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
~1st amendment to the United States Constitution

Any society that would give up a little liberty to gain a little security will deserve neither and lose both.
~Benjamin Franklin

The individual has always had to struggle to keep from being overwhelmed by the tribe. To be your own man is hard business. If you try it, you will be lonely often, and sometimes frightened. But no price is too high to pay for the privilege of owning yourself.
~Rudyard Kipling

Everyone has the right to freedom of opinion and expression; this right includes the freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers
~Universal Declaration Of Human Rights, Article 19 was discovered, and not invented, and that these frequencies and principles were always in existence long before man was aware of them. Therefore, no one owns them. They are there as free as sunlight, which is a higher frequency form of the same energy.
~Alan Weiner

Free counters!