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Old 08-29-2018, 11:48 AM
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Default Channel Master 5094A drawing and dimensions

I was looking for a good base scanner antenna and the search was either an ST2 or the preferred Channel Master 5094A Monitenna . I found a 5094A new in box locally, and before I put it up on the roof, I thought I would draw and dimension it for anyone who may want to build one of their own. The forked elements are what make this antenna interesting. There are short and long forks and I have detailed the dimensions and locations.

I have the AutoCad drawing or a PDF if anyone is interested. Just message me if needed

Kevin
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Last edited by kevinb77777; 08-29-2018 at 12:19 PM.. Reason: added installation instructions and better 3D drawing
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Old 08-29-2018, 12:31 PM
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Is it a direct copy of the ST-2 but without the two extra dipoles for 400MHz and 700/800Mhz?
Are the Channel Master antenna connected to a 300-75 ohm balun?

/Ubbe
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Old 08-29-2018, 12:43 PM
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Quote:
Originally Posted by Ubbe View Post
Is it a direct copy of the ST-2 but without the two extra dipoles for 400MHz and 700/800Mhz?
Are the Channel Master antenna connected to a 300-75 ohm balun?

/Ubbe
No and yes.
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Old 08-29-2018, 12:46 PM
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Yes it has the 300 to 75 ohm balun transformer. It comes with RG6U 75 ohm coax also. Interesting though was the scanner side of the coax was an old male Motorola connector.

It is a 5 band antenna as in the attached pdf and will handle 800MHZ. The original 5094 could not handle the 800 Mhz band.

In case anyone has the original 5094, I understand you need to install those forked elements to get 800 MHz. I dimensioned them exactly and their location on the dipoles.

Kevin
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Old 10-09-2018, 10:52 AM
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Default Channel Master 5094A drawing and dimensions

Know this is an old thread but found one myself about a month ago.
Brand new in box.
Lady who was selling it had no idea what she had and posted it to Facebook Market Place.
Told me its been in her basement since early 80ís when her & her husband got a divorce.
Now itís in my basement until I figure on what to do with it.


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Old 10-09-2018, 11:29 AM
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Too bad some manufacturer didnt take the lead and start building and selling these.
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Old 10-09-2018, 11:41 AM
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Agree.
I only heard stories for years on how good this 5409A antenna was.
Never in a million years I ever thought I would stumble upon one in my neck of the woods.
Also never realized that this thing is over 10 foot tall once itís expanded.




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Old 10-09-2018, 11:58 AM
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Im thinking there must be a company out there who would like to make alot of money putting these out.
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Old 10-09-2018, 1:27 PM
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I would add a fiberglass pole going across the two long elements just like the Antennacraft ST2 modification. The weak point is the plastic holder of the elements. I zip tied the 4 foot fiberglass pole using heat shrink wrap and zip ties.

I found mine the same way. The guy has been trying to sell it on a local ads for about 2-3 years and never found anyone who was interested. I am in the process of getting it up on my roof.

hardest part was finding a mast locally. Without Radio Shack around find a tall mast was not easy. I finally found a local fencing company that had 1 5/8" X 20 feet of fencing top rail that is schedule 40 or in the trade it is called WT-40. It has 0.120" thick wall. and about $35. should be plenty strong enough for this application.


Kevin
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Old 10-09-2018, 3:25 PM
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I concur on the plastic.
I tried to extend one side and was scared to bend the element or break the plastic.
I there a trick to get the element over the plastic tab or ya just have to do it quick to jump over it sorta ?


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Old 10-09-2018, 7:38 PM
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The fiberglass rod will bend and just jump it over the plastic. I used a orange fiberglass rod from walmart near the hardware section. It was a few dollars for two of them.

Kevin
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Old Yesterday, 11:26 PM
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Posted it on eBay.


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