Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #11   Report Post  
Old September 11th 06, 02:16 PM posted to rec.radio.cb
external usenet poster
 
First recorded activity by RadioBanter: Sep 2006
Posts: 298
Default cb recieve pre amp

On 4 Sep 2006 16:51:16 -0700, "Telstar Electronics"
wrote:

+++
+++Slow Code wrote:
+++ (avj 1) wrote in
+++ :
+++
+++ what's a good recieve pre amp? the Dosy or the Maco.
+++
+++
+++ It's amazing the things people buy just to hear CB'ers better.
+++
+++ Sc
+++
+++The real problem is that the pre-amps don't accomplish anything. They
+++are just a gimmick since they are unable to improve the signal-to-noise
+++ratio. All they do is boost everything... noise and all... LOL
+++
+++
www.telstar-electronics.com

*****************

Actually a well designed preamp will improve signal to noise
performance. The real issue is that addign a preamp to a poorly
designed receiver will dramatically lower the dynamic range of the
first RF stage and mixer. Also at CB frequencies the usable
sensitivity due to atmospheric noise is about 0.25 microvolt per
meter. This is easily acheivable in even the poorest designed
receiver.

No preamp can compensate for loss of signal in the coax or do to a
poor antenna design/setup. Once lost, it is gone.

james
  #12   Report Post  
Old September 21st 06, 12:41 PM posted to rec.radio.cb
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 296
Default cb recieve pre amp


"james" wrote in message
...
On 4 Sep 2006 16:51:16 -0700, "Telstar Electronics"
wrote:

+++
+++Slow Code wrote:
+++ (avj 1) wrote in
+++ :
+++
+++ what's a good recieve pre amp? the Dosy or the Maco.
+++
+++
+++ It's amazing the things people buy just to hear CB'ers better.
+++
+++ Sc
+++
+++The real problem is that the pre-amps don't accomplish anything. They
+++are just a gimmick since they are unable to improve the signal-to-noise
+++ratio. All they do is boost everything... noise and all... LOL
+++
+++
www.telstar-electronics.com

*****************

Actually a well designed preamp will improve signal to noise
performance. The real issue is that addign a preamp to a poorly
designed receiver will dramatically lower the dynamic range of the
first RF stage and mixer. Also at CB frequencies the usable
sensitivity due to atmospheric noise is about 0.25 microvolt per
meter. This is easily acheivable in even the poorest designed
receiver.

No preamp can compensate for loss of signal in the coax or do to a
poor antenna design/setup. Once lost, it is gone.

james


Yep, unless your rx has a truly awful frontend even the best preamp is
useless or worse. In this case you would probably be better off getting your
radio fixed or getting a new radio.


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yaesu FT-51R HT - Air/WX recieve? Jim Mooney Equipment 2 February 22nd 06 03:00 AM
Any way to recieve Sideband, RTTY, Morse code and Fax on Kaito KA1001? atomicthumbs Shortwave 5 January 5th 05 05:26 AM
Recieve Preamp avj 1 CB 1 September 23rd 04 06:05 PM
Pro - 37 will not recieve juny Scanner 0 August 23rd 04 01:23 AM
trying to recieve signal thru dirt tater schuld Scanner 6 September 17th 03 12:34 AM


All times are GMT +1. The time now is 01:24 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017