[NLRS] [BC'ers] Give away + Need advice on DirecTV dishes

[Zack Widup]

I've been using a WA3RMX triband feed with a prime focus dish for
years. That covers 2.3, 3.4 and 5.7 GHz. It has done fine for me. I
have a separate feed for 10 GHz. The WA3RMX feed is mounted on a piece
of 0.25 inch hardline I got from DEMI some years ago. The 10 GHz feed
is mounted on a piece of UT-141. Both screw onto an N connector on the
back of the dish for easy band changing.

73, Zack W9SZ


On 6/7/13, Dr. Gerald N. Johnson <geraldj at netins.net> wrote:
>
>
> The Vivaldi that Kent sells is 10-25 GHz, not very useful on 3.4 GHz.
> His PCboard log periodic that does cover 2.1 to 11 GHz has less gain and
> I think the spill over the sides of the dish will be great, hurting the
> transmit gain and the receive signal to noise ratio. The dish will
> concentrate the received signal on the feed, but the feed will see noise
> sources like hot earth from the spillage.
>
> You could make a Vivaldi for a lower frequency range, just make it 3
> times the size of his 10-25 GHz and it has better gain than the LP, but
> still may spray RF past the edges of the dish and pick up some noise
> sidelobes. It is possible to array Vivaldi's but it gets messy.
>
> 73, Jerry, K0CQ
>
> On 6/6/2013 7:55 PM, David Palm wrote:
>> I have a bunch (like 10) DirecTV dishes with feeds.
>>
>> I am going to be in White Bear Lake, MN on Monday - Wednesday of next
>> week.  *Anybody who wants one (or more), please let me know and I'll
>> bring
>> one up.*
>>
>> In terms of my own use, I was thinking of keeping two, one to optimize
>> for
>> 10 GHz per the discussions on this list that I have saved off.  An
>> optimized antenna for 10 GHz seems to make a lot of sense for 10 GHz-only
>> events.
>>
>> One I'd like to outfit with with a WA5VJB PCB Vivaldi antenna as a
>> multi-band feed for a rover dish on 3456, 5760, and 10 GHz.  Non-optimal,
>> of course, but it seemed like it might work well for roving (aiming one
>> dish and work the three bands.)
>>
>> So, I'm curious if that makes any sense.  Or would it be better to look
>> for
>> other dishes besides there.  I'd value your advice.
>>
>> Thanks and 73,
>>
>> David  W9HQ
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