[MAMS] April 2011 Microwave Activity Day

[Dave Sublette]

Well, I can understand the mast diameter situation. However, by 
extending the boom-to-mast plate only an inch above and below the boom, 
the number of clamps could doubled. That should solve the problem 
without adding too much weight or size.

I'm doing better these days. I had some trouble with irregular 
heartbeat, but that is under control now.  I am going to Huntsville for 
the SVHFS conference. I hope to see a lot of long time friends there.

Dave

On 4/5/2011 8:51 AM, Zack Widup wrote:
> Hi Dave,
>
> How are you doing?
>
> That is what I'd do if it were a home station. It's a portable station
> and I've tried to make everything as small and compact as I can. Since
> I only expect winds like that once or twice a year at most when I'm
> portable, I don't know if I want to do that.
>
> The mast sections I use are the 5-foot interlocking lengths sold by
> Radio Shack. I found that the smaller diameter end fits perfectly into
> a tripod I have when I remove the extender shaft with the tripod head
> on it. I can generally go up to 10 feet with mast on this tripod
> (Bogen 3011).
>
> I usually carry for or five of these mast sections around with me on
> portable operations. I have a tilt-over base and guy ropes that I have
> had come down only once in years of operating portable. And if I'd
> been able to get to the ropes to tighten them in time, that wouldn't
> have happened. I usually go up 20 feet with the 144/222/432 mast when
> portable.
>
> 73, Zack W9SZ
>
>
> On 4/5/11, Dave Sublette<k4to at arrl.net>  wrote:
>>>    I don't know how to keep
>>> the 902 looper from spinning. I had the bolts on the mast clamped as
>>> tight as I could get them and it still spun around.
>>>
>> 1) use a larger diameter mast.
>>
>> 2) use a larger boom-to-mast plate and double the number of clamps that
>> go around the mast.
>>
>> For just a small increase in mast diameter, you will get a great
>> increase in torque resistance.
>>
>> 73,
>>
>> Dave
>>
> ______________________________________________________________
> MAMS mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mams
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MAMS at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>