s.com
Date: Wed, 08 Sep 2010 20:32:58
To:
Reply-To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Can't get Vertex VXR5000 to program
That's what I was trying to do.
--- In Repeater-Builder@yahoogroups.com, "Gary W. Gibbs " wrote:
>
> Read the repeat
Read the repeater first
NIMS: 100 200 300 400 700 800
Arrl Extra Class VE
HAZ MAT- A O
sent from my blackberry mobile device
-Original Message-
From: "wspx472"
Sender: Repeater-Builder@yahoogroups.com
Date: Wed, 08 Sep 2010 19:24:15
To:
Reply-To: Repeater-Builder@yahoogroups.com
S
s any additional input from Bill,
should hopefully help me to complete the project.
I will post again later if I have any success.
Best regards,
Gary, K7EK
Personal Web Page: www.k7ek.net
--- In Repeater-Builder@yahoogroups.com, "Gary - K7EK" wrote:
>
>
> Greetings,
>
ends would greatly outweigh the down side.
Thanks for any constructive ideas, suggestions, links, etc, that you might be
willing to share concerning this situation.
Best regards,
Gary, K7EK
Personal Web Page: www.k7ek.net
small business' is
a scam. You save nothing on your bill!
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bon & Hal
Sent: Saturday, August 21, 2010 2:39 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [R
7 when we started, .91 when we
moved the HVAC away from the panel and did some load balancing.
Gary
N6LRV
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Friday, August 20, 2010 6:14 PM
To: Repeater-Build
You won't see any difference. The electric meter reads true power not VA.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
> Sent: Friday, August 20, 2010 8:00 PM
>
will do little good. Even
without a coax protector, just bonding everything is a great first step.
The whole idea is to keep everything at the same voltage level when a strike
occurs.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com
I don't know if you really don't get it or you are just trying to be
controversial. I tend to think a little of both.
Either way, I give up.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Russ Hines
Se
heading for the Advil. My apologies.
Thanks, Gary, for admitting the 43 doesn't measure power directly. One myth
down.
Of course, it is a directional coupler, no argument. That makes it a
reflectometer, it enables the instrument to isolate forward/reflected
samples to some degree of reliab
read chapter 2 "theory of operation" of the Bird manual that you show
the reference to.
Then read it again!
73
Gary K4FMX
Another chance? Which part, erroneous readings, don't directly measure
power, or the voltmeter part? Sure, what the heck. ;-)
I've had Bird
is the wrong way
> > to go here. First the transmitter should be optimized into a
> > 50 ohm load. Then optimize the duplexer input for 50 ohms input.
Of course I am talking about when the duplexer is presenting a good 50 ohm
input impedance at the operating frequency.
>
> Yes, ye
find true
power delivered to the load.
When measuring SWR you must always calculate it (or use the chart) and
compare reflected to forward indicated on the meter. It is easy to be fooled
as indicated forward power also drops as reflected power drops.
73
Gary K4FMX
_
From: Repeat
load to the transmitter that can sometimes cause the
transmitter to overheat or reduce output. Placing a cable of a different
length between output and the first cavity can sometimes change the unwanted
off frequency load seen by the transmitter.
73
Gary K4FMX
_
From: Repeater-Bu
I'm almost positive Mfj bought them.
When I placed a catalog order hygain was one of the catalogs I received.
NIMS: 100 200 300 400 700 800
Arrl Extra Class VE
HAZ MAT- A O
sent from my blackberry mobile device
-Original Message-
From: Tim
Sender: Repeater-Builder@yahoogroups.com
Da
What model radio is this ?
NIMS: 100 200 300 400 700 800
Arrl Extra Class VE
HAZ MAT- A O
sent from my blackberry mobile device
-Original Message-
From: Duane Hall
Sender: Repeater-Builder@yahoogroups.com
Date: Thu, 22 Jul 2010 11:18:04
To:
Reply-To: Repeater-Builder@yahoogroups.co
Gareth,
If it's of any help I have two new/old stock heavy duty Scala yagis
available in the 460-470Mhz range. These are in the factory radomes as well.
I'm looking to get rid of them because I don't think I'll ever use them.
Reply directly to me if interested.
I'm pretty sure meteors, ICBM's, and the
like will bounce right off of it.
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of batwing411
Sent: Monday, May 31, 2010 10:07 AM
To: Repeater-Builder@yahoogroups.com
wo here working this
way right now. Subsequent versions of that manual as well as 6881200C40 show
the actual splits by model family.
73,
Gary
N6LRV
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon
Sent: Tuesday, Ma
e but they do share the same
accessories and are built on the same platform. Needless to say there's a
lot yet to learn about them.
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Douglas
Sent: Tuesday, May 25,
watts carrier output with a single transmitter.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of George
> Sent: Sunday, April 25, 2010 7:19 PM
> To: Repeater-Builder@yahoogroups.com
>
PEP of 500 watts. (10^2 = 100*5 watts = 500 watts pep)
So if you have ten 5 watt transmitters fed into the amplifier the amplifier
must be capable of 500 watts PEP.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroup
Just for grins, find a place (house) to hook your spectrum analyzer up to
the local cable system and see if it is on there.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Besemer (WM4B)
Sent: Saturday, April 24
Sorry Skipp, never got that request, sometimes I think
not all the emails to this group end up getting forwarded to
me. If you've followed the thread you know I did order one
that is not quite exact but should work. Thanks again
everyone for your help.
Gary - K7NEY
On 4/17/2010 5:
nd should function OK. Thanks to all who responded to my query.
There were a lot of good ideas and they are all appreciated.
Gary - K7ney
On 4/16/2010 9:58 PM, Barry wrote:
If all else fails it should be simple to work out the requirements and
make one requires some ma
Thanks, I sent them an email and they said they haven't sold that
capacitor in 25 years and all spec sheets, etc are all gone. Was worth
a try though. I'll keep looking
Gary
On 4/15/2010 4:28 PM, ac6vj wrote:
Gary,
Try Viking Technologies LTD. at www.cardwellcondenser.com
they h
I already found that one, thanks anyway, the 167-205 is close but not enough
plates, mine has 6 rotor and 6 stator. Physical size is right though,
maybe this
cap was made by Johnson also since the numbers are close.
Gary
On 4/15/2010 1:59 PM, DCFluX wrote:
http://www.surplussales.com
d any luck where I've been looking.
Gary K7NEY
Tom,
Please contact me direct (off the group) or change your email filters to
allow incoming replies.
Thanks,
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Thomas Oliver
Sent: Thursday, April 08, 2010 5:42 AM
To
yahoogroups.com
> Subject: [Repeater-Builder] Sineman/Gary Schafer
>
> Did you get the e-mail of the Sineman brochure or do I have a wrong e-
> mail addy?
>
>
>
>
>
>
x27;t remember the name of it now.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Dawn
> Sent: Friday, March 26, 2010 4:29 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repea
o use on each end of a line being
tested. You could talk back and forth to the guy on the other end and send
each other tones and measure levels each way.
73
Gary K4FMX
> There were very few combination analog/DVM's at service instrument
> prices and the DMM's that had bar gr
> Gary: The guy that marketed that 40 db power pad was actually a rep,
> a real character. I still have the data sheet and picture somewhere
> here in my library. He used to tell me his real money came from
> making and selling waders.
>
> BTW I do have the schematic and J
n the
continental U.S. Reply directly to me (off this email group) if interested.
Thanks.
Gary
The charger is spoken for. Thanks all.
Gary
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gary
Sent: Thursday, March 25, 2010 6:39 PM
To: Repeater-Builder@yahoogroups.com; 2wayradios4s...@yahoogroups.com;
radios4s...@yahoogroups.com
directly to me (off of this email group) if interested.
Gary
nt of
it. It had a port for the transceiver and one for the signal generator and
another for the receive input on the monitor. It worked pretty well. There
may be a few floating around yet.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repea
That was an auto ranging voltmeter. They were rather expensive at the time,
compared to nowadays. As I remember it you could select auto range, or lock
it in a particular range.
73
Gary K4FMX
> -Original Message-
> From: Alicia Mehrdad [mailto:abcza...@gmail.com]
> Sent:
rs from me around 1984.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Dawn
> Sent: Tuesday, March 23, 2010 6:08 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Bu
for awhile
and may have had their name on them in the Motorola catalog for awhile.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Tony Faiola
> Sent: Tuesday, March 23, 2010 5:11 PM
&g
The math is right. RF will not flow on the inside of a tube. It acts as a
waveguide beyond cutoff.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kirk Mefford
Sent: Wednesday, March 17, 2010 4:49 PM
To: Repeater
Here is another place to get copper strap even cheaper:
http://www.gacopper.com/
$1.05 per foot for 2 inch strap. (.012 thickness)
$1.70 per foot for 2 inch strap. (.022 thickness)
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
2/0 copper
> wire
>
> On 3/17/2010 12:11 PM, Gary Schafer wrote:
> > 5/8 OD gives you 1.96 inches (5/8 x 3.14) of surface area. 1 inch
> copper
> > strap gives 2 inches of surface area.
> >
> > 2 inch copper strap gives you 4 inches surface area. Copper s
K6YC
5/8 OD gives you 1.96 inches (5/8 x 3.14) of surface area. 1 inch copper
strap gives 2 inches of surface area.
2 inch copper strap gives you 4 inches surface area. Copper strap should be
less expensive than copper tubing.__,_._,__
Why would you use copper tubing?
73
Gary K4FMX
Marine epoxy paint.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Tim - WD6AWP
> Sent: Wednesday, March 17, 2010 11:38 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeate
2.355 surface area.
The inside area of pipe does not count. RF will not flow on the inside of a
tube/pipe.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of David Jordan
Sent: Tuesday, March 16, 2010 12:18 PM
To
Copper strap is better as you get the benefit of both sides of the copper.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Jesse Lloyd
> Sent: Tuesday, March 16, 2010 11:42 AM
> To: R
able to the T on the output of the duplexer
we want to transform the low impedance up to a very high impedance at the T
so that it does not load the circuit at that point on that frequency.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yah
Good point. Yes loop length needs to be considered. Usually the velocity
factor of the loop is that of air so it needs to be calculated seperatly
from the cable and added.
Probably easiest to ask the cavity manufacturer.
73
Gary K4FMX
> -Original Message-
> From: Repeater-B
phase then they will cancel. You have a big null in the pattern
there.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of afa5tp
> Sent: Wednesday, March 10, 2010 12:31 PM
> To: Repeater-Bui
It proves your point-if you just use a 'T' connector, it'll be deaf as a
> doorknob.
In this case the receivers would benefit from a "splitter". That would make
everything see 50 ohms regardless of cable lengths.
Also the splitter 3 db loss per side will probably be less that what it is
now as each receiver takes half the power to start with no matter if you
have a splitter or not.
73
Gary K4FMX
and
forth on the line and less ultimately reaches the receiver.
The more original line loss there is the worse the problem becomes.
This is another reason for paying attention to proper matching at the
receive end.
You end up with the same kind of loss that you get on a transmitter due
PM, Gary Schafer wrote:
Without the proper length cables between the cavities and the antenna T
connector both UHF and VHF signals will be attenuated depending on the luck
of the cable length.
What technical reason causes this?
Nate
Hi Nate,
A UHF pass band cavity for example will pass
x27;t worry about it being 75 ohms rather than 50 ohms. Without a
splitter one receiver can load the input of the other considerably
(depending on the luck of cable lengths) if just a simple T is used to
connect the antenna to the two receivers.
73
Gary K4FMX
_
From: Repeater-Bu
Don't be too sure about that. Once the am station signal gets into the
receiver it can go anywhere and cause havoc. It could be getting into the IF
or the mixer once picked up by cables.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repea
s I assume.
Thanks!
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson
Sent: Wednesday, February 24, 2010 5:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Motorola cabinet key wanted
y.
Ted, K9MDM sent me an email saying that he has those keys for sale. I will
probably get them from him.
Thanks again to all
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson
Sent: Wednesday, February 24, 2010
when.
Any other guesses?
Thanks
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson
Sent: Tuesday, February 23, 2010 10:37 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Motorola cabinet
about 3 feet tall and longer than wide.
Thanks!
Gary K4FMX
comment was "tongue in cheek" to make his point
about the antenna.
That cable in most cases can be any random length.
There are times when a selected length will help the transmitter with the
load that it sees due to out of band impedances that get presented to it.
But you can not say that a certain length will be called for.
73
Gary K4FMX
s yet to be seen meanwhile Motorola is clearly focused on developing
the Mototrbo platform.
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dan Blasberg
Sent: Sunday, February 14, 2010 10:12 AM
To: Repeater-Bu
I tuned one at one time on 447.05/442.05 and it worked well. Don't
remember the rejection numbers though.
Gary - K7NEY
On 2/5/2010 9:52 PM, James Adkins wrote:
Wondering if anyone knows if the 6-cavity set of DB-4072's made for
450-470 MHz will go down to 444.425 MHz / 449.425
Does anyone have or know someone that I can get the listed part above?
Motorola doesn't make this part anymore.
nsfer switch. I
find the switch to be bumpless and the inverter's output is quite
sinusoidal. Batteries were $95 each delivered.
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of rrath
Sent: Friday, January 08, 2010
uling repair or calibration work can
be a little tricky now that GD manages the product line and the service
center is no longer run by Motorola but the same folks are still there and
the service hasn't changed from what I understand.
Gary
-Original Message-
From: Repeater-Builder@
Mike,
MoSlo Deluxe for DOS takes care of CPU cache automatically and offers an
option to turn the COM port controller's FIFO buffer OFF as well. While I
still use these instructions when executing MoSlo I find my PC's all default
to FIFO OFF anyway.
Gary/N6LRV
-Original Message
processor speed show up after the second execution of MoSlo but ignore it
and move on to running the RSS. I've tried it on several PIII's with both
DOS 6.22 and Win 98SE operating systems (Win 98SE booted to DOS of course)
and every one works equally well.
Gary/N6LRV
-Original Me
. I have seen a couple of
batteries explode when someone disconnected the charger from the battery
first. It is a bomb!
That's more than most will want to know.
73
Gary K4FMX
>
> As another note . . .
> Please do not tie a back-up battery directly across the main output
> term
e receiver from generating IM in its
first active stage. Remember that when you add a preamp you destroy the IM
performance of the receiver by the amount of gain in the preamp.
73
Gary K4FMX
> > Letting the preamp generate "poop" & then filtering the
> > off-channel
The Midland 13-509 is spoken for.
Thanks all,
Gary
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gary
Sent: Friday, November 27, 2009 1:38 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Midland 13-509
sking $50 +s/h. If interested please email me direct (off the group).
Gary
N6LRV
only look at gain figures and noise figures,
also look at the intercept point to see how much signal it will handle
before compression starts. That's where it will start generating IM
products.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailt
ble fails.
Inside a sailboat mast there is no way to secure the cable and it will flop
around inside the mast. Lots of stress on the cable.
As a side note, there should be NO solid conductor wires used on any boat.
Only stranded wires due to the constant movement and related stress.
73
G
anging the
coupling loops. Then you can do the same measurement as described above to
see how much rejection you will get.
Also look at some pass band curves in the catalogs and you will see about
how much rejection a pass cavity will give you at a given distance away from
where it is tuned.
73
G
that level) then change the level of the signal and read the dB difference
between the two.
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of skipp025
> Sent: Friday, November 20, 2009 2:38
was a good thought but the equipment had other problems, mostly
manufacturing at reasonable cost.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Robert Pease
Sent: Friday, November 13, 2009 8:01 AM
To: Repeater-Builder
tools. Not too
difficult once you learn the procedure. When you're done it should function
fine from about 420 to 450Mhz.
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of wa0vus
Sent: Monday, November 02, 2009 7:19 PM
Hello,
I am looking for the pin-out of the DB-15F connector on the back of this
repeater. Any help would be appreciated very much.
Thanks & 73
Gary K2ACY
Hello Ian,
I happen to have both the connector ( NEW ) for the radio and several new in
the bag KRA-17M Kenwood antennas.
Send me your shipping address and I will get to you a price for parts and
shipping.
Gary
--- In Repeater-Builder@yahoogroups.com, "kerinvale" wrote:
>
>
Hello Eric,
Would you kindly provide me with the Tech support email address you used for
Astron.
Ive been un able to get a good address.
Thank you in advance!
Gary
. If
you're not sure what I'm referring to check SRN1201 or SRN1201A. Yes I
checked with Motorola already. This was apparently long enough ago that
current tech support staff haven't heard of it.
Thanks all,
Gary
it starts to approach AM
in regards to noise rejection.
Narrow bandwidth modulation has less power in the sidebands
73
Gary K4FMX
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of MCH
> Sent: Friday, Octobe
s cavity also serves as
a low pass filter for the isolator harmonic products.
Without an isolator on each transmitter additional isolation is needed to
keep IM products down. As Jeff said, the duplexer should do fine.
73
Gary K4FMX
Yes, I noticed. That's why I asked about similar test data on the 404B. I
look forward to you next test results on the other 408's in hopes that they
will accurately represent what my omni directional 404B's can offer for
reasonable bandwidth below 14dB RL.
Thanks Jeff.
Gary
N6LRV
Jeff,
Do you have any similar test data available for the DB404B?
Thanks,
Gary
N6LRV
Off the top of my head, no, I don't. When I go to install this antenna I'll
try to remember to do a wider sweep before it goes topside.
I have the original Decibel VNA plots that came with other
ma
Sorry group, ment to send this direct.
Gary
-Original Message-
From: Gary [mailto:n6...@cox.net]
Sent: Friday, September 25, 2009 7:22 PM
To: 'Repeater-Builder@yahoogroups.com'
Subject: RE: [Repeater-Builder] ICOM ic f-420-9
Hi Mathew,
I may be interested in some. Are they u
Hi Mathew,
I may be interested in some. Are they used or new? Also, how much are you
asking for them?
Thanks,
Gary
N6LRV
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Matthew Kaufman
Sent: Friday, September 25, 2009 6:28
d not Part 95 or 97 radio
services.
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of wmhpowell
Sent: Monday, August 31, 2009 9:49 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Narrow Banding and VHF
I sent it to Mike WA6ILQ for posting on the Repeater Builder Site, It's a
really big file, youcan get it there when he gets it posted. I
couldn't find it
again on the internet but had a copy on my system.
Gary
shibukiau wrote:
>
>
> Thanks for the comments Gary
I have a 1600S, have had it now for about 3 years. No trouble at all. I
Love it.. The operators manual is available on the net in a PDF, however I
got mine from the company I purchased the Monitor from in printed form.
It's
several hundred pages.
Gary - K7NEY
shibukiau wrote:
>
&g
rk better" with more
isolation in the duplexer just because it has more isolation. Once you meet
the isolation requirement and some reserve built in to cover things that
drift etc., then more is not going to help you.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.
polarizations can be transmitted together.
TV has no need to transmit anything other than horizontal polarization as
most TV reception is done with a horizontal antenna.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of
plexer".
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kevin Custer
Sent: Saturday, August 22, 2009 5:38 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] isolation
Eric,
You may h
t find a dealer that knows
where your repeater is then I'd suggest a good ol' fashioned transmitter
hunt. Do you have any amateurs in your area that are up to the task?
Gary
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Beha
d a dealer or
tech experienced with the MTR and who has the software necessary to
configure it. Have them download its codeplug. Recommend you do the same
with your school radios. A comparison of the data will likely answer a lot.
Gary
-Original Message-
From: Repeater-Builder@yahoo
Definitions:
Circulator - ferrite device with 3 ports.
Isolator - Circulator with a load on the 3rd port.
Intermod panel - Isolator with a harmonic filter. The harmonic filter may
consist of a 2nd harmonic notch filter or a low pass filter or a band pass
cavity.
73
Gary K4FMX
lexer to pass the high frequency because
sometimes
you can find a null but not the right one. I would tune it for you for
nothing but I have
no Idea where you are located and I'm sure there are others who would
also if you
would give a location so someone could respond.
Gary - K7NEY
hbb
and
15 on
the other. I don't think there is anyway you'll be able to tune it by
ear. Try and
find someone with the proper gear, you'll be much happier in the end.
Gary - K7NEY
Joe wrote:
>
>
> Hopefully, you have only tried to tune on of the cans. If you still
> hav
Actually galvanized and copper plated ground rods should not be mixed in any
ground system. Electrolysis will deplete the plating. All ground rods in any
ground system are electrically connected to one another.
73
Gary k4FMX
_
From: Repeater-Builder@yahoogroups.com
inductance thus lowering
the impedance of the path.
A separate heavy copper wire or strap running down a tower tied to the
antenna to ground is a waste of copper. The tower itself is a much lower
inductance path than what a separate ground wire provides.
73
Gary K4FMX
> -Original Mess
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