Hi Dan,
I have used several of them in the past. While they provide lots of
preselection, they aren't great where NF is concerned. I believe a
simple 2 section BP Cavity and GaAs device to follow would easily beat
the GLB in performance; both in preselection and NF.
Kevin
Dan Hancock wrote:
Have you guys tried the Simrex (formerly GLB) helical resonator pre-amp? It's great for repeater applications. Very selective and moderate gain. If you're using Bp-Br type cans you don't need any further filtering. http://www.simrex.com/site/products/preselector/Preselector1.pdf http://www.
Think about this for a minute, if the noise level increased, the squelch
circuit would have seen MORE noise and rammed the squelch closed.
What actually happened is, adding a better device in front of the
receiver lowered the receivers total noise figure, decreasing the noise
in the
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Sent: Sunday, December 18, 2005 8:36 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] UHF Preamplifier
At 12/17/2005 10:21, you wrote:
>At 10:15 AM 12/17/2005 -0800, you wrote:
>
> >I found that the 17dB gain was way
At 12/17/2005 10:21, you wrote:
>At 10:15 AM 12/17/2005 -0800, you wrote:
>
> >I found that the 17dB gain was way too much for the receiver
>
><---That's one reason I swear by Chip's stuff for over 15 year.
>
>He places stability and noise figure over gain. The result are preamps with
>extremel
At 12/17/2005 11:07, you wrote:
>Bob M. wrote:
>
> >I found that the 17dB gain was way too much for the receiver, and the
> noise level increased dramatically, to the point that I had to tighten
> the squelch settings.
> >
>
>Think about this for a minute, if the noise level increased, the squelc
At 12/17/2005 10:15, you wrote:
>I've got the same setup. I also have a 4-section
>Celwave bandpass filter between the duplexer and
>preamp. I found that the 17dB gain was way too much
>for the receiver, and the noise level increased
>dramatically, to the point that I had to tighten the
>squelch se
Like others have said, Lunar doesn't exist any more. Angle Linear is the
current company, and Chip Angle makes great products. However, if your ARR
is working, you are likely not to experience any measurable improvement in
performance by switching to something else (assuming the ARR you have is
Bob M. wrote:
>I found that the 17dB gain was way too much for the receiver, and the noise
>level increased dramatically, to the point that I had to tighten the squelch
>settings.
>
Think about this for a minute, if the noise level increased, the squelch
circuit would have seen MORE noise and
At 10:15 AM 12/17/2005 -0800, you wrote:
>I found that the 17dB gain was way too much for the receiver
<---That's one reason I swear by Chip's stuff for over 15 year.
He places stability and noise figure over gain. The result are preamps with
extremely low noise figure, unconditional stabil
I've got the same setup. I also have a 4-section
Celwave bandpass filter between the duplexer and
preamp. I found that the 17dB gain was way too much
for the receiver, and the noise level increased
dramatically, to the point that I had to tighten the
squelch settings. The sig strength metering went
mdnosliw wrote:
>I am currently running a AR2 preamp on my MSF5000 repeator with a
>cellwave 526 duplexor. I was thinking if uogrsding to Lunar preamp,
>but can find no reference to them on the internet. If anyone has any
>contact information it would be appreciated.
>
I haven't heard anything
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