Hey Guys,
Well few of us played with the repeater today. We took the preamp
out of line and then did the desense test. We shut the transmitter
of, opened the squelch and listened to a weak station on input of the
repeater, when the transmitter was enabled I was the only one to
notice any
At 01:34 PM 5/23/05, you wrote:
Hey Guys,
Well few of us played with the repeater today. We took the preamp
out of line and then did the desense test. We shut the transmitter
of, opened the squelch and listened to a weak station on input of the
repeater, when the transmitter was enabled I
Alexander,
Not trying to be a smart A$$,
but why would you put a preamp in line and then an attenuator?
Kind of defeats the purpose of the preamp.
What make of preamp are you using and how much gain does it have? Might
want to try one with a lot less gain,
I think I saw a couple postings stating
Not trying to be a smart A$$,
but why would you put a preamp in line and then an attenuator?
To prevent receiver overload.
If the noise level received by the antenna is sufficiently high (i.e. higher
than the natural thermal noise floor of the receiver/preamp), an attenuator
ahead of the
Alexander,
That is a good start. Now you have some more work to do
(sorry I didn't have a chance to comment before your trip
to the site!)
With the preamp OUT and repeater transmitter DISABLED, get
someone to give you a weak signal (something that is far
from full quieting). Now put
Jeff's excellent dissertation on adding attenuators ahead and behind
preamps has been added to the following page:
http://www.repeater-builder.com/rbtip/preamps.html
Kevin Custer
Not trying to be a smart A$$, but why would you put a preamp in line and then an attenuator?
: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Joe Jarrett
Sent: Sunday, May 22, 2005 5:47 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Poor Repeater RX
This has to be OT for this group but the proper conversion would be:
KiloCycles per Second
, 2005 7:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: RE : Re: [Repeater-Builder] Poor Repeater RX
Don't you mean, kiloCycles?
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: Saturday, May 21, 2005 7:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: RE : Re: [Repeater-Builder] Poor Repeater RX
Don't you mean, kiloCycles?
On 5/21/05, Kevin K. Custer [EMAIL PROTECTED] wrote:
--- Original Message ---
From : Eric Lemmon[mailto:[EMAIL PROTECTED
--- Original Message ---From: Eric Lemmon[mailto:[EMAIL PROTECTED]Sent: 5/21/2005 4:05:15 PMTo : Repeater-Builder@yahoogroups.comCc : Subject : RE : Re: [Repeater-Builder] Poor Repeater RX Alexander,TheSinclair Q-202G duplexer can barely make 85 dB when tuned
Don't you mean, kiloCycles?
On 5/21/05, Kevin K. Custer [EMAIL PROTECTED] wrote:
--- Original Message ---
From : Eric Lemmon[mailto:[EMAIL PROTECTED]
Sent : 5/21/2005 4:05:15 PM
To : Repeater-Builder@yahoogroups.com
Cc :
Subject : RE : Re: [Repeater-Builder] Poor Repeater RX
KiloHertz is the correct term!
Richard, N7TGB
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of DCFluX
Sent: Saturday, May 21, 2005 7:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: RE : Re: [Repeater-Builder] Poor Repeater RX
Don't
21, 2005 7:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: RE : Re: [Repeater-Builder] Poor Repeater RX
Don't you mean, kiloCycles?
On 5/21/05, Kevin K. Custer [EMAIL PROTECTED] wrote:
--- Original Message ---
From : Eric Lemmon[mailto:[EMAIL PROTECTED]
Sent
Is the preamp in a shielded box?
Is the power to the preamp via a feedthrough capacitor?
How does the repeater perform without the preamp?
What does the transmitter look like on a spectrum analyzer?
How does the repeater work with a simple 1/4 wavelength vertical?
Is all of the cable going into
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