Wanted Looking for a Machinist with a Lathe and some 3/8 Brass Rod.....

Discussion in 'Buy Sell Trade' started by BTPost, Sep 6, 2015.


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  1. BTPost

    BTPost Old Fart Snow Monkey Moderator

    Driven Element. Looking for a Machinist, with a Lathe, and some 3/8 Brass Rod..... I will pay $100US plus shipping, to ANYONE, who machine the posted Drawing, with exact Measurements to .001" in Brass.....
     
    Last edited: Sep 6, 2015
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  2. ghrit

    ghrit Ambulatory anachronism Administrator Founding Member

    Check with Mortis on the Handloader's Bench.
     
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  3. azrancher

    azrancher Monkey +++

    I don't know what a "Courner" reflector is, it like a dead reflector, or what... does it have to be solid brass, or can it be tube?

    Rancher
     
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  4. ghrit

    ghrit Ambulatory anachronism Administrator Founding Member

    Corner (oops, BT) reflector is a directional antenna, in this case, very specific dimensions. For those dimensions drawn, solid is required. Saying that, a different length and size may work in tubing. BTPost will advise.
     
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  5. BTPost

    BTPost Old Fart Snow Monkey Moderator

    It needs to be solid Brass, however the Small end can be a cutdown Treaded Brass Bolt, with the Head removed, that is screwed into the Rod Base.... The Critical things, are the LENGTH Dimensions, and the Rod Width Dimensions. These are what sets the Frequency, and Bandwidth of the Antenna. I don't spell well, and the CADD Program doesn't have a Spell Checker... Should read "Corner Reflector" like the one in Path Survey on Sunday...... | Page 2 | Survival Forums Post 12....

    There, fixed the Spelling....
     
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  6. Dont

    Dont Just another old gray Jarhead Monkey Site Supporter

    Trying to call Dad.. He is out and about, and he won't take payment. He expects one to give what one values the job to the church.
     
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  7. BTPost

    BTPost Old Fart Snow Monkey Moderator

    @Dont.... If he will make it for me, I will donate the $100US to the Monkey, for Site Maintenance.....
     
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  8. Brokor

    Brokor Live Free or Cry Moderator Site Supporter+++ Founding Member

    @BTPost --Is the threaded part recessed/chamfered or is it flush at the end? Just my inquiring mind.
     
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  9. BTPost

    BTPost Old Fart Snow Monkey Moderator

    The Originals were One solid Piece of Brass Turned, and the the 8-32 Threaded end made with a Die.... When I got 4 of these Antennas, 30 years ago, they were in a Phased Array, on top of Hoonah Mtn, at the Alascom Site, and were that end, of a Radio Phone Shot to a Logging Camp 45 miles to the south. The Logging Camp closed, and the Tropospheric, 60" High, Billboard Antenna that they were Mounted on, was being torn down, so I asked to get the Corner Reflectors, as Junk. The Driven Element on one was broken off, when they were lowered to the Ground. They sat on the Ground, out back, for a few decades. Then I used two of them, for a 10 Mile UHF Phone Link, to a Remote Site @ Litnikof Cove, Alaska, from the Haines, AK Airport. When the Linikof Cove Site, got Wired Phones, a decade later, those Antennas were junked by the Manager. I called him, two weeks ago, to see if they might still be around. No Joy there.... So, when I went to do the Path Study, I dug out the two I had left, and then remembered that one was busted. So I used the one, and dug up the 10 element Crossed Yagis for the other end. Of course, They haven't made these Antennas in Decades, so there are NO Parts available, and why I am looking for someone to build me, a New Part. A New Part, will turn a "Hunk of Scrap Metal, in a very nice, Servicable Antenna, again.... That is the Story, as I recall....
     
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  10. Brokor

    Brokor Live Free or Cry Moderator Site Supporter+++ Founding Member

    So, it's flush at the base of the rod where the 8/32 threads are. Thanks.
     
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  11. VisuTrac

    VisuTrac Ваша мать носит военные ботинки Site Supporter+++

    I'm going to guess that unless otherwise specified, C-360 would work.
     
  12. BTPost

    BTPost Old Fart Snow Monkey Moderator

    The exact makeup of the Brass, is not significant... Copper itself is to soft, and might bend in the weather, where Brass, has more strength. Once the oxidation on the surface takes place the electrical properties, are very stabile. I have both of the Antennas, dissembled on the front room table, (AlaskaChick is still in NYC, till thursday) and I am going reassemble one, from the best parts of Both, for now. Then if I can get a New Driven Element, I will reassemble the second one. Tomorrow, I will replace all the O-Rings in the Antenna Feeds, and test the Antenna with my Cushman CE-50A1 w/Spectrum Analyzer/Tracking Generator option, setup with an Impedence Bridge. This will prove out the Frequency & Bandwidth of the Antenna, and measure the Front to Back Isolation Ratio. That will tell the tail, on if it is still operational near the Factory Specs, and give me a Baseline, if I can reassemble the second one.
     
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  13. Airtime

    Airtime Monkey+++ Site Supporter

    PM me if you don't get what you need in the next couple weeks. I have not set up and leveled my lathe in my new shop and I need a reason to do that. I can't get to this for a couple weeks but after that it would be very easy to make this. I wouldn't need any payment, would be happy to help you out.

    AT
     
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  14. Dont

    Dont Just another old gray Jarhead Monkey Site Supporter

    Sorry, Dad has not answered his phone, think he is with the cousin's for the holiday.
     
  15. BTPost

    BTPost Old Fart Snow Monkey Moderator

    This isn't a Hurry Up deal, at this point... I just need one, to complete the ReAssemble, of my second Antenna. The first one goes to the ABP Radio Upgrade Project.
     
  16. AD1

    AD1 Monkey+++

    BT

    Did you get your rod made yet?

    I sent the drawing off to a local machinist friend to see what he will quote.
     
    Last edited by a moderator: Oct 13, 2015
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  17. BTPost

    BTPost Old Fart Snow Monkey Moderator

    No, Not yet.... Thanks, AD...
     
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  18. AD1

    AD1 Monkey+++

    I will let you know when I get a response. from my guy
     
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  19. BTPost

    BTPost Old Fart Snow Monkey Moderator

    Thanks....
     
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  20. AD1

    AD1 Monkey+++

    Do you need just 1?
     
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