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[Ham-80211] Re: 2.4 GHz remote broadcast

kd4e kd4e at verizon.net
Tue Feb 20 04:13:30 UTC 2007


 > > Steve wrote:
>> Are all forms of Ham communications on 5.2 & 5.4 limited to 1W eirp or 
>> only high-speed data/video?Short answer: Max achievable EIRP is 946.4 
>> Kilo-watts for Part 97, or obviously the minimum necessary to carry 
>> out the communications, just like any other thing in ham radio.Nothing 
>> overlaps at 5.2 GHz... more so 5.6 & 5.7 see these 
>> links:http://www.qsl.net/kb9mwr/projects/wireless/pwr.html
>> http://www.qsl.net/kb9mwr/projects/wireless/allocations.html 

Awesome resource, thanks!

These were VERY amusing to read, especially the EIRP!

900 MHz (non spread spectrum i.e 802.11g)  1500 watts  (per 97.313)  	14 
dBd yagi  37.8 Kilo-watts

What sort of surplus amplifier hardware is available for
900MHz and at what sort of prices, please?  I hate to
think of the price tag on a 1.5KW 900MHz amp!

2.4 GHz (non spread spectrum i.e. 802.11g)  1500 watts (per 97.313)  		
	24 dBi partial parabolic  376.8 Kilo-watts

Generating 1.5KW on 2.4GHz is not within the reach of the
average Ham, even 150W may be tough, though that still
equals 37.7KW EIRP!  :-)

The 3.3GHz transverter http://www.ubnt.com/sr3_faq.php4
is interesting for many reasons:

1.  It interfaces with the Atheros Linux MadWiFi driver.

2.  It takes a consumer off-the-shelf 2.4 GHz 802.11 hardware
	and puts it on the 3.3GHz Ham band.

3.  100W x 25 dBi dish = 31.6 Kilo-watts EIRP!!

Questions:

1.  What is this device likely to cost?

2.  Are amplifiers available surplus and what are
	they likely to cost?

3.  Same question re. high gain 3.3GHz antennas and the
	associated cables/waveguides?

4.  Distance and signal toleration in bad weather?

It is so much fun to learn new things in Ham radio!

-- 

Thanks! & 73, doc, KD4E
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Projects: http://ham-macguyver.bibleseven.com
Personal: http://bibleseven.com
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