Hello To All:
Does any one have suggestions for a repeater
preamp. 160 Mhz Rcv range and 153 Mhz Xmit range.
I 'd like to find a unit with about 6-9dB gain, possibly with
a preselector.
I am trying to stay away from the Adance Receiver Research
type that runs "wide open" with 24+ dB of
I have no personal experience with them but have
talked to people that have had good experiences with LNA technology preamps http://www.lnatechnology.com/
Just today I ordered a 160Mhz preamp from Angle
Linear, www.anglelinear.com
I've read in this forum rave reviews of Chip's preamps.
I have a GLB Preselector-Preamp in my hands right now and it is an MRF901
transistor. Kevin, you are correct. Photos available for those who don't
believe. ;-)
I have several of these in 2 meter and 222Mhz versions and use them to
either fix or prove many problems. They will fix a
Better use an isolation diode...
The linear Astron supplies I have worked on have a crowbar
on the output. If it fires, it will foldback the supply causing no problem,
but also put a dead short across the battery!! Not cool..
Royce - W3IF
The crowbar would then pop the fuse that I put at the
I'd agree with Royce, W3IF. I too had a power supply across my battery bank
for my
sump pump. It was a really nice Hewlett-Packard 6264B adjustable 0 - 20 volts @
20 amps.
One day after switching off the AC, the power supply started to smoke !
Upon investigation, it was repairable since
At 09:01 AM 4/9/2005, John J. Riddell wrote:
I'd agree with Royce, W3IF. I too had a power supply across my
battery bank for my
sump pump. It was a really nice Hewlett-Packard 6264B adjustable 0 -
20 volts @ 20 amps.
One day after switching off the AC, the power supply started to smoke !
we have used both the UHF and VHF models
form TX-RX and am very happy with them
- Original Message -
From:
Steven
Passmore
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, April 09, 2005 5:28
AM
Subject: Re: [Repeater-Builder] VHF
preamps
I
for many years (12) I had a 420 on the top on a 78 foot tower in Florida
the tower had 3 sets of guys cables on it.. it made it thought all the
storms we for here but no ice as Florida has none. Just lots of wind. The
worst all the lighting the tower had hit it in all the years it was up.
Hi David,
There is time out timer, tail time and audio/tone
level adjustments right on the repeater board.
You could try no pl in the decode slot of the
programing information and the desired signaling
in the tx side. If you were using an external
controller, tx signaling (sub tone or
The higher gain is associated with a GaAsFet preamp,
not a DGFet or Bipolar preamp. ARR Makes both.
Angle linear doesn't make a Phempt (GaAsFet type
device) on VHF.
For the lower gain, you can get one from both
the above sources. Since I prefer the lower
noise, higher gain GaAsFet
Joel,
It is not a simple task to properly apply a preamp at VHF. There's a
lot of noise in the VHF band, not just from man-made sources, but also
from Mother Earth and the sky. This noise pickup is often made worse
when vertically polarized omnidirectional antennas are used.
Almost all
Joel Mele wrote:
Hello To All:
Does any one have suggestions for a repeater
preamp. 160 Mhz Rcv range and 153 Mhz Xmit range.
I 'd like to find a unit with about 6-9dB gain,
possibly with a preselector.
I am trying to stay away from the Adance
Receiver Research type that
--- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED]
wrote:
...It is not a simple task to properly apply a preamp at VHF...
As usual, Eric has given excellent advice. Preamps at VHF land mobile
are often not
Joel,
You should call Chip Angle and he will
sell you the highest quality pre amp period.
http://www.anglelinear.com/
Oregon Repeater Linking Group
Mike Mullarkey
6539 E Street
Springfield, OR 97478
[EMAIL PROTECTED]
www.orlg.org
-Original Message-
From:
I think we may be playing cross-questions and crooked answers here...
After referencing Catalog 38, you are correct regarding FSJ. I won't even
go into the VXL series cable...
Just one engineers practical perspective..
mike
-Original Message-
From: Roger Grady [mailto:[EMAIL PROTECTED]
Just a little interesting Trivia I read in the Local paper, The first
Motorola cell Phone in 1984 the Dyna Tac Cost $3,9995, And weighed 2
Pounds and offered just one half hour of talk time then down for
recharging. Now we know Cell phones weigh ounces last all day and
sometimes free.
Don
This reminds me. Does anyone have any info on a TKR-720? I have acquired
on154 MHz. Will it program down to the ham band?
Glenn
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Hi
Does anyone have a schematic for a Johnson Scorpion programming cable?
or one they want to get rid of?
Thanks
Brian
Yahoo! Groups Links
* To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
* To unsubscribe from this group, send an email to:
At 10:54 AM 4/9/05, you wrote:
Does anyone have a schematic for a Johnson Scorpion programming cable?
or one they want to get rid of?
Thanks
Brian
Can't help you on the cable, but I can tell you that the
programming software will not go below 450mhz unless
patched.
I helped a friend do that a
At 08:49 AM 4/9/05, you wrote:
--- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED]
wrote:
...It is not a simple task to properly apply a preamp at VHF...
As usual, Eric has given excellent advice. Preamps at VHF
Here's something else to be figure out
Who invented the cell phone and what was the
original use? And where was the first tower installed?
Cell phones are pretty neat in their complexity, yet
they are interesting to follow along and just wonder
how long it took them to get the *seemless*
Hello List,
Would anyone have a GE Versatone
network(white plastic) believe the number # 19C320291G1 for sale or
trade?
I have a 136.5 and need one at either 100hz or an
88.5hz.
Contact me off list please ... larry at
thunderbolt.net
Thanks
Larry
Yahoo! Groups Links
To
Benjamin Naber wrote:
Here's something else to be figure out
Who invented the cell phone and what was the
original use? And where was the first tower installed?
The subject is OT but..somewhere I have a late 70's ATT Bell Labs
Record magazine which featured this new technology.
Dr Martin Cooper. I saw a documentary on him a couple of years back.
Here's a bit more on it.
http://inventors.about.com/library/weekly/aa070899.htm
Dexter McIntyre W4DEX wrote:
Benjamin Naber wrote:
Here's something else to be figure out
Who invented the cell phone and what was
Do you still need a MRF-901? Let me know. I still have some in one of the
parts bins.
Richard D. Reese
http://www.wa8dbw.ifip.com
- Original Message -
From: kc4wgh [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, April 08, 2005 11:59 AM
Subject:
At 03:32 PM 4/9/2005, Benjamin Naber wrote:
Here's something else to be figure out
Who invented the cell phone and what was the
original use? And where was the first tower installed?
Cell phones are pretty neat in their complexity, yet
they are interesting to follow along and just
Got this working thank you all for your help it was in the software.
john
- Original Message -
From: motarolla_doctor [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, February 01, 2005 5:47 AM
Subject: [Repeater-Builder] Re: motorola R-100 repeater
--- In
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