Hello group
I am looking for some grounding kits for the LDF5-50A 7/8
Andrews Heliax
I have one allready installed at the top of the coax and was told I
should have one at the bottom also .. any comments on this ?
I want to protect my Ant and repeater system the best I can ..
the ant is a
Rick,
The conventional practice is to install a grounding kit at the point
just before the feedline enters the radio shed, and run the grounding
lead straight down to a grounding electrode. Inside the shed, your
lightning/surge arrestor should be solidly grounded to the station
grounding electro
q
if you leave now with a couple of drivers you'll probably get here in a couple of days. then the website is of no consequence...you'll be where the action is and there has been action.
hope to see you here soon. i will be posting pictures shortly of the warehouse area as it is today.
rick i think we have these. i'll look on monday. got brand new in boxes.
mdmRick - VA3RZS/Charlotte - VA3CMR <[EMAIL PROTECTED]> wrote:
Hello group I am looking for some grounding kits for the LDF5-50A 7/8 Andrews HeliaxI have one allready installed at the top of the coax and was told I should
rick i think we have these. i'll look on monday. got brand new in boxes.
mdmRick - VA3RZS/Charlotte - VA3CMR <[EMAIL PROTECTED]> wrote:
Hello group I am looking for some grounding kits for the LDF5-50A 7/8 Andrews HeliaxI have one allready installed at the top of the coax and was told I should
Has anyone converted an MSR2000 base to repeater configuration? I am
wondering what the conversion would entail.
Will
KC4YBZ
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At 10:59 PM 1/15/05, you wrote:
Has
anyone converted an MSR2000 base to repeater configuration? I am
wondering what the conversion would entail.
Will
KC4YBZ
Well, there is a web site associated with this yahoogroup...
www.repeater-builder.com
Just click on Motorola, then Mitrek / MSR-2000
a
I can read Ted's site up here in Michigan you may want to call your repair
department I had to a few times already ranging from static on my telco
lines to slow as a snail Connect Speed also ask them ( which really gets
their goat ! ) when are they switching to Fiber Optic Cable ? Telco
Compa
We use 3 ground kits at work (cell company). The
first at the top of the tower, the second at the base
of the tower just before it makes the turn to go
horizontal, and the third outside the entry port to
the building. All ground kits are installed with the
groundkit pigtail pointing towards the
If you want to read a short paper on Lighting Protection and learn; obtain a
GE paper on "Living with Lighting" by Kenneth Guthrie. After Ken retired
from GE, he taught a course at George Washington University on Lighting
Protection. Ken has passed away some years ago but his works still remain an
Rick:
You didn't say what kind of tower. I'm assuming this is a Ham type tower
at your house, but you might want to say so if it's otherwise.
Keep in mind that lightning protection is not individual things you do,
it's an overall approach you take. If you haven't already, you should read
up
Hi Will,
I've done one or two...
Base station implies the MSR was originally
used in simplex (non repeat operation). If
you want to convert a prewired duplex base
station, there are a number of coversions
around, including mine on the
www.radiowrench.com/sonic web page as well as
one or
It really isn't that bad. It requires removing the antenna relay and
adding a second antenna port (1 for tx, 1 for rx), and a few power switching
modifications on the backplane to allow the receiver to remain on during
tx. I could probably go dig up the manuals and notes from my last
co
Very good advice Fred - Thanks
The only thing I can find on the Internet regarding this paper is a
reference in an ARRL paper "Lightning Protection for the Amateur Station"
located here:
http://www.arrl.org/tis/info/pdf/0206056.pdf
Also a good read. I live in South Florida: Good Grounding pra
I have a vhf mitrek that has been split for repeater operation. It
has work flawlessly until now. When the TX is unkeyed the transmitter
will stay keyed for approx 10 seconds. During this time it generates
a wide signal +-1Mhz centered on the TX frequency with full power out.
Once 10 seconds
Sorry, I guess I should have more specific; I have checked the web site,
both conversions began with repeater stations. I have a VHF simplex base
station with one antenna port.
Will
In a message dated 1/16/2005 2:11:08 AM Central Standard Time,
[EMAIL PROTECTED] writes:
At 10:59
Hey Gregg
How do you like that K2/100
I came across the website By accident.. been thinking of building one
ever since..
I just wish it operated AM besides SSB... any info would be great..
easy Build and align???
Neal-ka2caf
Gregg R. Lengling wrote:
It really isn't that bad.
the tower is a trylon
yes this system is at my house
I just want to make sure this equipment is protected as best I can
as for the AC MOST of the equipment runs through a UPS ... the
only thing that does not is the PA ..
I will look into something for the AC line ..
Thank you verry much
Sean,
Most Class C VHF power amplifiers have DC voltage provided continuously,
and the TX keying is performed earlier in the chain at the exciter or
one of the drivers. What you describe is a very serious problem:
self-oscillation that is generating spurious signals at full power.
Since this o
I have a few of the MSR-2000 Squelch Gate Modules available, if you need
one (provides the COS signal for an MSR-2000 Repeater).
LJ
Original Message:
-
From: skipp025 [EMAIL PROTECTED]
Date: Sun, 16 Jan 2005 11:04:21 -
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-
Since the PA in these radios is class C they are always active and they
rely on the loss of input signal to drop the amplifier. Sounds like you may
have some oscillations in your PA after the exiter drops generating the
spurious output. I have seen this many times before. especially on the
--- In Repeater-Builder@yahoogroups.com, "maxjam_99" <[EMAIL PROTECTED]>
wrote:
>
>
> I have a vhf mitrek that has been split for repeater operation. It
> has work flawlessly until now. When the TX is unkeyed the
transmitter
> will stay keyed for approx 10 seconds. During this time it
gen
I am sure this has been asked before, but I did a search archive on
the subject and came up with 0. I have a GR 300 repeater with no
duplexer, so I need 2 antennas. I tried a Larson mobile antenna w/
the ground radials as the receive antenna and the same for the tx
antenna. These are mounted o
Rick - VA3RZS/Charlotte - VA3CMR wrote:
>Hello group
>
>I am looking for some grounding kits for the LDF5-50A 7/8
>Andrews Heliax
>
>I have one allready installed at the top of the coax and was told I
>should have one at the bottom also .. any comments on this ?
>
Hi Rick,
I don't have any
Hi Sean,
Have you tried placing the transmitter into a
load/termination, then observe if the problem
changes?
Also later testing with the cover(s) off, does
the spur go away when you pull the tx element
to stop the transmitter?
How much power is output from the tx?
Do you have a circu
maxjam_99 wrote:
>I have a vhf mitrek that has been split for repeater operation. It
>has work flawlessly until now. When the TX is unkeyed the transmitter
>will stay keyed for approx 10 seconds. During this time it generates
>a wide signal +-1Mhz centered on the TX frequency with full power o
Rod,
The idea here is to get as much vertical seperation as possible, it doesnt
sound to me like you have enough seperation if both antennas are mouted to a
station master tube. Also, the rule of thumb is, the more gain an antenna
has, the better vertical isolation you get. Yagi's have good ga
Rod,
I put some typical numbers into my CommShop for Windows program and came
up with some recommendations that may surprise you. Assuming a 25 watt
GM300 and 0.35 microvolt sensitivity, the program recommends 84.21 dB of
isolation. This can be achieved with two identical antennas, in line
with
Eric, I stand corrected. It is not a circulator, but a DCI Band Pass
Filter. The local radio repair shop I deal with called it a preselector.
So it sounds like what I need to due is look for a duplexer for one
antenna. The repeater is 15 watts, will do 40, but I wanted it less
than 1/2 power.
>The rx ant at the top
> and
> the tx ant at the bottom, about 12' to 14' separation. The system
> would
> talk to itself. I removed the tx ant and replaced with a 4 ele yagi -
> works good. I need a omni ant for both rx and tx. I have an isolator
> on
> the tx and a Bp cavity and a circulator on
You could just buy two pass filters.
number one to pass only the transmitter and installed on the transmitter.
Number two would be a pass filter on the receiver tuned to the receiver this
will stop your problem.
73 Russ,
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Sunday, J
Bob,
Pin 8 on the SM50 accessory connector is an open-collector output that
can be programmed in the RSS for any one of four functions: Null, CSQ
Detect, PL/DPL & CSQ Det, or External Alarm. The output can sink up to
200 mA, and its saturation (low) level is about 0.3 VDC. The SM50 radio
does
I do not need to talk long distances, only in this one canyon. Thus
the reason for the mobile antenna setup as a base antenna. It looks
like I need to buy a duplexer for 2 meters and be done with it. I am
on a tight budget - like most everyone else - and trying to keep the
cost down. I am not
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