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Author Topic: Simple screwdriver antenna controller recommendation?  (Read 2450 times)
AF8F
Member

Posts: 32




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« on: March 09, 2012, 05:01:43 PM »

I need a controller for a Little Tarheel II screwdriver antenna.  Will probably use this with an Alinco DX-SR8T/E.

All I want is up/down buttons and a turns counter, no automatic controls needed.  The Ameritron/MFJ SDC-100B fits this bill but it's big, and it's an MFJ product.  Need I say more?

My Googling found mentions of units made by Arduino and AMAC but I can't find information on them, or where they can be ordered.

Kits are fine.

Can anyone point me to a simple screwdriver antenna controller?

Thanks for your help.
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K0BG
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Posts: 9883


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« Reply #1 on: March 10, 2012, 06:53:38 AM »

You're sort of on your own, except for the universal model of the Turbo Tuner. Of course there is always a manual controller.
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WX7G
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Posts: 6202




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« Reply #2 on: March 10, 2012, 08:50:54 AM »

I use an Ameritron SDC-103 controller in the home shack to control a Tarheel screwdriver.
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WD5GWY
Member

Posts: 406




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« Reply #3 on: March 10, 2012, 09:59:50 AM »

How about going low tech like I have with my Little Tarheel II ?
Get the manual up/down switch from Tarheel ($12.00 from Tarheel)
and listen to the background noise increase as you move the antenna
up and down. Then, when the background noise on the band/frequency
of choice is at it's peak, switch to AM and key the mic and bump the antenna
up and down slightly, to fine tune the SWR. If your radio does not display
SWR, you can use the Power Out display and peak it that way.
Works good and is cheaper than anything else.
If that doesn't meet your needs, Tarheel has controllers with the turns counter
and memories too. (starts at $110 or so)
Or you could even roll your own !
james
WD5GWY
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W4EJY
Member

Posts: 1




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« Reply #4 on: March 15, 2012, 04:26:04 PM »

Have played with this.  1 round Magnet, peace of copper tubing magnet will just fit and super glue magnet, flatten the other end copper tubing, flatten and drill a hole at the radius of the antenna, take apart and put this in the antenna just above motor and lock with two nuts.  Now you will need to replace the up- down switch to DTDP momentarywreing of switch: one pole tht same as the other the other go to activate a relay only when antenna is going down... on EBay they sell a up-down counter around 26 - 30 dollars, outside antenna a window burglar alarm pickup super-glued and wired through the relay to the up-down counter...Now have not built this but have given it thougt
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WX7G
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Posts: 6202




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« Reply #5 on: March 15, 2012, 07:45:37 PM »

I use an Ameritron SDC-102 in the home shack to control a Tarheel 200HP.

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K7MH
Member

Posts: 344




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« Reply #6 on: March 15, 2012, 10:49:41 PM »

I just use a simple momentary DPDT switch mounted in a small project box.
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