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Author Topic: 102" whip and manual tuner  (Read 874 times)
G7SQW
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Posts: 25




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« on: March 15, 2003, 04:01:09 PM »

I would like to have a go at a bit of HF static mobile operating this year on my holidays this year and wondered if it would be OK to use a 102" s/s whip on my hatch mount and to a manual ATU (MFJ 945E or similar)and my radio is a IC706.Of course I would like to be able to use a AH4 or similar, but for maybe a week or two casual operating a year £360 or approx $540 (UK prices) is more than I am willing to part with.
Just one more question I would like to ask and that is about power,and would it be more advisable to use a seperate battery,I thought a leisure battery would be more suitable maybe about 100AH or should I go for something bigger.
Thanks
Andy G7SQW/M3SQW
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K0BG
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« Reply #1 on: March 15, 2003, 08:50:29 PM »

If you have a way to mount your tuner less than 2 or 3 inches away from your 102" whip, fine. It'll work. Otherwise, stick with the AH-4 or one of the SCG units.

Why?

The loss through even a short chunk of coax (regardless of type) will be so lossy on any frequecy other than the resonant one (?10 metres), your effective radiated power will be nil (less than a few percent).

Alan, KØBG
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G7SQW
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Posts: 25




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« Reply #2 on: March 17, 2003, 12:59:28 PM »

Hello Alan,
Thanks for the words of advice that you have sent to answer my questions.
Maybe it would be better for me to just get a couple of whips,maybe the pro-am or Iron Horse type as these seem to work OK and would be well within my budget for occassional static mobile use.
As for the seperate power supply for the radio I think I will try a leisure battery of 100AH or maybe a bit more.
Thanks again for taking the time to reply and anymore advice would be a big help from anyone who would like to reply.
Andy G7SQW
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K0BG
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« Reply #3 on: March 18, 2003, 05:24:40 PM »

I have a few articles posted here on eham.net. You might want to review them.

http://www.eham.net/articles/4407
http://www.eham.net/articles/4424
http://www.eham.net/articles/4425
http://www.eham.net/articles/4623

Alan, KØBG
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