[amsat-bb] Re: S band downlink on P3E
al7cr at punakea.com
Thu Sep 7 21:45:36 PDT 2006
I too totally agree. I see no reason why we can not vote on the
designers decision with our support dollars. Personally, I am giving
all mine to P3E.
The fact that they are "designing the ground equipment too" is of no
comfort to me. My S band gear is on the tower and operating.
If AMSAT thinks this is such a great decision then let them find the
money to support it without the majority of us.
sco at sco-inc.com wrote:
> I totally agree with you.
> Les W4SCO
> At 02:38 PM 9/7/2006, you wrote:
>>I am in _TOTAL_ agreement. I live in the suburbs of Tampa/St. Pete and never
>>had an interference problem on my 3 foot dish. I have used the same dish to
>>log well over a dozen WiFi access points in that immediate neighborhood.
>>With properly designed equipment, all that trash on 2.4 ghz goes away with
>>some elevation. What won't work is helixes with multiple sidelobes, and
>>surplus dishes that let one whole polarity of noise right thru the back.
>>Everyone knows I'm a big supporter of AMSAT, but I gotta call it as I see
>>it. It makes me think of "bait and switch" to collect money for a project
>>featuring such a popular mode and then drop it.
>>The loss of Mode B on AO-40 caused a lot of the hardcore AO-10/AO-13 types
>>to walk away, and that was tough to overcome. Now that we have, and we have
>>people wanting S band, we leave them behind too. Even if it's a sound
>>engineering decision (and that hasn't been proven to me) it's a horrid
>>marketing decision. Bad mojo for a organization that lives on the donations
>>of it's members.
>>Sorry if this causes any pain to those involved with Eagle, but I needed to
>>get it off my chest.
>>73, Drew KO4MA
>>AMSAT LM 2332
>>>While AO-40 was still alive and I was working it from deep within "Silicon
>>>Valley", an area blanketed by WiFi, 2.4GHz cordless phones, etc., I
>>>discovered that a parabolic dish with a properly positioned and designed
>>>patch feed (slightly under-illuminating the dish and having no significant
>>>side-lobes) would bring in AO-40's S-band downlink very nicely and cleanly.
>>>Of course, other feed or antenna types such as helical antennas/feeds were
>>>useless in that environment.
>>>I have to admit that I don't buy the "too noisy" argument.
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