Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Amps for 2.4GHz  (Read 818 times)
KE7BFE
Member

Posts: 10




Ignore
« on: May 03, 2005, 12:38:12 PM »

Is there any reason that I could not use a Wi-Fi amp for 2.4GHz FM video?  These amps are cheap and have a very wide input power range.  Here are a couple:

http://www.teletronics.com/amplifiers24ghz500.html
http://www.teletronics.com/amplifiers24ghz1wattout.html
http://www.hyperlinktech.com/web/ha2401rtg.php

I know that they are designed for spread spectrum but why wouldn't they work for FM?

Chris
Logged
WB2WIK
Member

Posts: 20635




Ignore
« Reply #1 on: May 03, 2005, 01:15:31 PM »

I'd have to ask, "why?"

These are really low powered.  Are they actually cost effective?  Are they *linear?*

For 2.4 GHz ATV, I'd want to run more than 1 Watt output, and *linearity* is extremely important with ATV (video is AM, and any non-linearity results in horrible video distortion).  There's already inexpensive stuff specifically designed for the amateur market that does this job cost-effectively, and runs more than 1W.

WB2WIK/6
Logged
KE7BFE
Member

Posts: 10




Ignore
« Reply #2 on: May 03, 2005, 01:21:26 PM »

I only need about 1W.  Any more than that and I would be wasting precious battery power.  Do you know of any reputable places to buy from?

Thanks
 
Logged
WB2WIK
Member

Posts: 20635




Ignore
« Reply #3 on: May 03, 2005, 03:22:45 PM »

I missed something, first time.

Did you say, "FM video?"

Who's using FM video?

For amateur 2.4 GHz stuff that's priced very well and works fine, try PC Electronics:

http://www.hamtv.com

WB2WIK/6
Logged
KE7BFE
Member

Posts: 10




Ignore
« Reply #4 on: May 03, 2005, 04:01:52 PM »

Here are a couple of FM video devices:

http://www.transmitvideo.com/model_z23b.html
http://www.sbszoo.com/ve6atv/5hw.htm
Logged
WA4MJF
Member

Posts: 1003




Ignore
« Reply #5 on: May 03, 2005, 06:57:09 PM »

I use FM ATV below 33cm, in fact, only
on 70 cm do I use AM.

73 de Ronnie

Logged
WA4MJF
Member

Posts: 1003




Ignore
« Reply #6 on: May 03, 2005, 06:58:14 PM »

Shoulda read at 33cm and below.

73 de Ronnie
Logged
WB2WIK
Member

Posts: 20635




Ignore
« Reply #7 on: May 04, 2005, 12:18:05 PM »

>RE: Amps for 2.4GHz  Reply  
by WA4MJF on May 3, 2005  Mail this to a friend!  
I use FM ATV below 33cm, in fact, only
on 70 cm do I use AM.

73 de Ronnie<

Interesting.  I obviously haven't kept up!  I used to work 70cm ATV quite a lot back about 20 years ago, and always used an RF downconverter and standard television receiver for receiving video; that obviously won't work for FM video, so you must use specific equipment with an A/V output-?

Is there a S/N advantage?

WB2WIK/6
 
Logged
WA4MJF
Member

Posts: 1003




Ignore
« Reply #8 on: May 04, 2005, 12:38:17 PM »

Yes, go to www.hamtv.com
for all the latest.

73 de Ronnie

Logged
KE7BFE
Member

Posts: 10




Ignore
« Reply #9 on: May 06, 2005, 12:12:01 PM »

I asked www.shireeninc.com whether their amps would work for FM and they said:

Chris,
 
Absolutely. WIth FM you can get upto 32 dB of output with saturated power.
 
regards
 
The only thing is that their amps are a bit more expensive than the ones at www.hyperlinktech.com.
I went to www.fab-corp.com and those amps look exactly the same as the Shireen amps but cost a bit less.
Logged
KE6PKJ
Member

Posts: 256




Ignore
« Reply #10 on: May 07, 2005, 10:39:40 AM »

You can buy a 1.3 watt amp as a pre-built evaluation board sample for $150, or for a couple of bucks buy the chip itself and make up your own board.

http://www.rfmd.com/DataBooks/db97/2126.pdf


 And if you want, I personally have some very small 200 mW, 600 mW and 1 watt 2.4 ghz fm video/audio transmitters that I can sell you. These are Pll 4 channel units but only 2 of the channels fall completely within the 2.4 ghz ham band.

Good luck,
Kirk
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!