On Sat, 3 Apr 1999 07:51:40 +0100 "Ian White, G3SEK"
<G3SEK@ifwtech.demon.co.uk> writes:
>
>Carl wrote:
>>
>>I am planning on mounting a 12" to 18" dish for 24 GHz high up one
>of
>>the towers on a sidearm. With a beamwidth of 1 to 2 degrees what
>would be
>>accurate enough for a rotator?
>>
>>Prefer something that is not overkill or requires a 2nd mortgage.
>
>In that price range, something like the KR-600RC is a reasonable buy.
>(After Yaesu took over Kenpro they changed the number, but IIRC it's
>still something with a 600 in it).
>
>The "RC" is the important bit - it stands for "Round Controller" and
>it's the one with the big 360deg dial. That gives you reasonable
>setting
>accuracy to get somewhere near the required heading.
So then I can probably use one of my old Create RC5A-3 worm drive
rotators? They also have variable speed control.
All I need then is a source of repair parts!
>
>The other need is a way of slowing it down, or else you'll regularly
>shoot past the best heading before you can stop the motor. There was
>a
>555/triac pulse controller in an old Ham Radio which works very well
>for
>this, and we reproduced it in 'The VHF/UHF DX Book'.
>
>The other trick, which I'm sure you know already, is to mount an
>antenna
>for your preferred talk-back band on the same rotator as an aid to
>lining-up.
Yes, I have planned to do that with something reasonably small for 2M.
All I have to do then is find someone to talk to!
Tnx for the help Ian, 73 Carl KM1H
>
>73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
> 'In Practice' columnist for RadCom (RSGB)
> http://www.ifwtech.demon.co.uk/g3sek
>
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