Not to get into a rules debate... BUT...
Just because a radio was once type accepted doesn't
mean it STILL is for a particular service.
Not saying the Micor falls into this category, but it might.
If a radio used to be TA'ed in 1961, it doesn't mean you can still use
it today. So, the old TA
In the case of a user, it's his uncoordinated operations that are
interfering with the coordinated repeater. Open and shut case. The user
has the primary responsibility to solve the interference.
Joe M.
Clarke, Tom VX-20 OPS wrote:
Can someone explain why the coordinator can make Matt change
For two set up, that's a pretty good price (for true repeaters, not
converted mobiles).
Joe M.
va6ef wrote:
I am looking at buying a pair of GE Master II UHF repeaters and
I am wondering if anyone could give me a ballpark figure as to there
worth .. they are asking 600 bucks for the
Bob Dengler wrote:
This is why SoCal is on an inverted 15 kHz bandplan in the 146-148 MHz
range: every 15 kHz the offset is inverted, so in our bandplan you'd
be on 146.325 (+) the other system would remain at 146.91 (-). Then
your distant user would be TXing on 146.925 not bother the
You're talking about (if I'm not mistaken) 1200 and 1800 Hz signals -
well within the voice passband of any repeater. A properly set up
standard repeater will pass packet fine. Your larger issue may be key-up
delays. Still, a good digital voice delay should do the trick, but I've
not done that
The length of the run isn't mentioned, and any meaningful option should
include that as a factor. If it's a couple hundred feet, I would agree
7/8 Heliax (or larger) would be my choice. If it's 10 feet, I wouldn't
use anything more than 1/2 Heliax.
Joe M.
russ wrote:
I would use 7/8's hard
Actually, 3 dB is the point at which you can first notice a change in
the signal. As far as whether it is worth it is up to the individual.
If a signal is 'fine', lowering it 3dB should not make it unusable. The
change should be noticable, but that's about all. Of course, that all
depends on the
I've seen some Low Band Maxtracs do about 80W. Yes, I backed them off to
60W (spec) before they went to the customer.
Joe M.
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I just received back a letter that went to someone who apparently passed
away several years ago, and they are still in the database.
I'm glad this guy's name wasn't Robert Smith! ;-
Joe M.
Jim B. wrote:
Mike Perryman K5JMP wrote:
I just did a quick advanced search on QRZ for the name
The M400 was the Radius version of the Maratrac (same relationship as
the Radius M100/206/208/214/216 to the Maxtrac series).
Joe M.
Brent wrote:
were those not called the M400 mobile beside the Maratrac models
- Original Message -
From: William E. Janes [EMAIL PROTECTED]
To:
Coax Style 100loss400 Ohms Vel. Cap per Ft. O.D. Shield Notes
Belden 8242
(RG-9/U type) 2.10 4.80 51 .66 30.0 pF0.42 98% silver inner
. double shield
RG-5518.5 34.0 53.5 .66 28.5 pF .216 ?PE dialectric
It IS? My AVG caught it, as did my Norton (they both usually do).
Now, if you notice, look at the sender's 'certification' (which you can
turn off in AVG - both the incoming and outgoing certifications). It
says Internal Virus Database is out-of-date.
You can hardly blame a program that is
Actually, doesn't the 5C specs say it will compensate up to X number of
ECs? (Not that it matters much for repeaters...)
Joe M.
Coy Hilton wrote:
Actually a 2C ICOM is internally compensated and will not compensate
any other ICOM it's Compensation pin is not connected internally.
All
Russ,
Why not let them discuss the subject alone? We have no first hand
knowledge of the situation in question (I know I don't, and I seriously
doubt you do either), so our input is not helpful. This is not the time
to promote either party, take sides publicly, or to draw conclusions and
make
Yes, you can diplex any two antennas (of sufficient frequency
separation). You will have to keep the feedline lengths correct from the
split (the 'T') to the antennas.
Joe M.
Rich wrote:
I know you can co-phase Mobil antennas, 33- 45 split.
Can It be done with Base antennas? With 50 ft of
.
Randy
On 12-Jan-05, at 5:24 PM, mch wrote:
He didn't say it was for a weather alert. Maybe he has another
application, but a 1050 Hz decoder is a 1050 Hz decoder.
BTW, Mike, thanks for the info on the 12-251 SAME weatheradio. I picked
up two of them. They are getting really hard to find
Just pick up an older NOAA alert receiver for a few bucks. They have a
1050 Hz tone decoder circuit built in. It's probably cheaper than making
a decoder yourself.
Joe M.
Randy Elliott wrote:
Greeting to the group
I need to decode a single frequency (1050 hz) and output a logic level
+
:
That is a real pain!!
The old system using 1050 hz decoding goes off weekly on tests, plus will go
off even if the problem is 3 counties away of no effect to your area.
Stick with SAME decoding.
-- Original Message --
Received: Wed, 12 Jan 2005 02:20:14 PM CST
From: mch [EMAIL
Ouch! Using that on a tower can be life threatening (literally). WD-40
tends to make metal very slippy. If you get some on your gloves or
shoes, your trip down may be faster than you want and you won't like the
sudden stop at the bottom.
Joe M.
Joe wrote:
Water has been used to spray on
Use portables...
Joe M.
Dakota Summerhawk wrote:
Is the best way to have a mobile repeater up and running with two mobile
radios and a duplexer? Looking for a way to be able to run a couple of
repeaters, one VHF, one UHF for a mobile communications van. Can anyone
recommend ways to cut
And the purpose of your post being?
Big deal. You posted my email service's info. OMG! LOL
The only purpose I can get from your post is a feeble attempt at
providing some kind of 'classified' info (which ANYONE can get, BTW) on
the remailer about my email service provider. Perhaps it's because
Portables are great but I need the 35W (UHF) and the 50W (VHF) out to
assure
that the coverage is adequate.
Thanks for the suggestion.
Dakota
-Original Message-
From: mch [mailto:[EMAIL PROTECTED]
Sent: Thursday, December 30, 2004 8:13 PM
To: Repeater-Builder
The 'correct' maximum depends mostly on your neighbors when it comes to
the ham band, but you should never run so much as to interfere with
adjacent channels. If you are operating in a 15 kHz bandplan where the
next adjacent channel above and below you is 15 kHz away, you should run
not more than
Wonderful. We've digressed to flaming yourself. ;-
For the internet communications impaired, that is a JOKE.
Joe M. (the one who can spell) ;-
Joe Montierth wrote:
--- Joe Montierth [EMAIL PROTECTED] wrote:
This post is about as relavent as the others.
RELEVANT YOU IDIOT!
--
If it's mixing in the receiver or transmitter, notching one of the
offending signals may help (such as a notch cavity on 152.240 or 152.840
MHz). Of course, it could be mixing in a number of other places, too.
Joe M.
Joe Montierth wrote:
It's not the 600 KHz that is the problem. The problem
And pray you don't cause interference with any other repeaters.
Joe M.
[EMAIL PROTECTED] wrote:
If all that fails then screw the repeater co-ordinator and change
your split.
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.296 / Virus Database: 265.6.0
Maybe it's like a Grade A Ham? ;-
Joe M.
JOHN MACKEY wrote:
Hmmm, after 20 years of ham radio, past experience in commercial 2 way
currently working as an Chief Engineer in the radio broadcast field and
possessing my Extra Amateur and GROL, I don't know what a FCC 1st class
licensed ham
A farm is a business. If it's a family farm, the entire family can be
considered employees. Besides, it doesn't take much to get a business
license. There are even public safety entities on the biz band (FDs and
EMS services are considered businesses, too).
The main cost will be for
at the
end of your postings so that we would know how great you are.
de WD7F
John in Tucson
- Original Message -
From: mch [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, December 20, 2004 11:00 PM
Subject: Re: [Repeater-Builder] HELP: 2 meter repeater intermod
6 kHz?!? I hope you're not on a 15 kHz band with a bandwidth of 18 kHz.
Joe M.
mbloom0947 wrote:
As for the deviation I have measured it with a Motorola Model
2600 service monitor at 6 KHz, about the same as other repeaters in
this area.
--
No virus found in this outgoing message.
I think you will want to talk to Richard Reese (WA8DBW). You might want
to check out his web site: http://www.wa8dbw.ifip.com
Joe M.
Q wrote:
Anyone familiar with this old controller? I need to press it into
service and change callsign and ect. I downloaded the pdf files already.
Thanks in
Western PA, and Stationmasters, Superstationmasters, and clones made by
several other companies. The best built was made by Telewave, but still
had the same problem after some time. All were top mounted, so
supporting the top of the antenna was not an option. I've seen it on
several dozens of
Yes - even after the ice thaws. Granted, it's much easier to see a
fiberglass antenna after the ice, but that's because they are frequently
on the ground if they get too much ice - especially when accompanied by
wind. It's not THAT bad, but dipole type antennas do survive the
elements much better
Uhhh... how can it be scattered AND in one piece? That sounds like an
oxymoron.
Joe M.
Neil McKie wrote:
Yup ... scattered around the tower site. Usually in one piece
though.
Neil
James wrote:
Ever seen a station master blown to bits by lightning?? (I like the
dipoles
Matt wrote:
Has anyone any experience of encoding a CTCSS tone of, say 77Hz, and
a DCS code at the same time?
Yes
Is the digital code going to mix with the CTCSS tone and produce a
bunch of harmonics that make the repeater sound horrible?
No, if set up properly.
Different tones will
You better incude Bob S-Com's modified PM exciter, too, or he will be
disappointed. ;-
Joe M.
Kevin Custer [EMAIL PROTECTED] wrote:
--
I have tested many repeater transmitters and can verify that
'most' station exciters that employ FM
Then why aren't they using 118.8 Hz? (2B)
Joe M.
Ken Arck wrote:
At 05:12 PM 12/3/2004 -0800, you wrote:
Motorola 4Z
CTCSS 136.5 Hz.
Com-Spec # 21
Kevin Custer
I hear it on good authority that the Columbia University School of
English Literature's ham radio club's repeater
If that is meant to imply that old is bad, and newer is better, we
should be talking about adding CDCSS (AKA DPL) to the repeaters, not
CTCSS (AKA PL)! (or maybe even LTR as opposed to CTCSS OR CDCSS)
But, it's a moot point when it was invented - it was not standard in ham
rigs until the 90s.
Yes, it's only 3 wires (B+, ground, and audio), but it's
amazing how many extra class licensees can't do that!
Joe M.
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Uhhh... coordinators DO have the authority to set the terms for which
they will grant (or deny) a coordination. It's the same as limiting the
ERP, or antenna height. If you say the coordinator has no authority to
require specifications, then what IS a coordination? Answer: It's a set
of operating
Painting eliminates the shielding properties of the metal?
Joe M.
Neil McKie wrote:
The Mitrek top cover is painted ... and won't provide good shielding
because of it.
Neil - WA6KLA
Mike WA6ILQ wrote:
Usually if the covers are in place, that won't be a problem
(the Mitreks
You forgot one very important detail. It has a frequency counter built
in. That feature alone makes it a great deal - especially for users on
this list. Where can you buy a frequency counter alone (that doesn't
even let you HEAR the signal) for less than $60???
Joe M.
Ronny Julian wrote:
200
I should point out that it is more of a nearfield receiver than an
actual counter. The resolution is only 5 kHz or so, but it is still
excellent for finding the frequency programmed in a radio or repeater.
You can't use it to set your transmitter on frequency.
Joe M.
mch wrote:
You forgot
For for everyone's info, I STILL have not heard from Steve Scott
[EMAIL PROTECTED]. I would recommend extreme caution should
he post anything else for sale on this list. It's now been almost two
months.
Joe M.
On Thu, 18 Nov 2004 22:26:50 -0500 mch [EMAIL PROTECTED] writes:
Sorry
It's not a 1-day sale - it was only from 6AM until Noon.
Joe M.
Mike WA6ILQ wrote:
Forwarded to WA6ILQ by another mailing list...
Subject: 1-day scanner sale - RS PRO-83 1/2 Price
Had to go to Radio Shack today for work, which turned out good for
me. Today (Nov. 26) ONLY the PRO-83 is
OK. I always get those mixed up. So, the shorted stub passes nothing
except the tuned frequency, right?
Joe M.
skipp025 wrote:
mch [EMAIL PROTECTED] wrote:
RG174 should still work, right? BTW, I came
up with 158' 1.3.
Joe M.
No, RG-174 is not good for this application
First, desense problems (how far apart would the two VHF antennas be?)
Second, licensing issues, perhaps?
On UHF, I would run dummy loads (frequency issues aside).
Joe M.
Anthoyn Lewis wrote:
I want to use 2 IC 2720 to repeat on vhf
for ex IC #1 RX 151.1000 tone 151.4TX 461.8000
RG174 should still work, right? BTW, I came up with 158' 1.3.
Joe M.
Mike Perryman wrote:
Skipp wrote
Another possible solution would be a shorted
1/4 wave stub inserted into the receiver -
duplexer side.
**
Keep in mind that 1/4 wave @1420 is roughly
Sorry for the semi-off-topic post. Has anyone else on the list had any
dealings with Steve Scott [EMAIL PROTECTED]? I sent him a
USPS MO a month ago, but haven't seen any product and have not even
received any email reply from him though I've emailed him several times.
I also see he hasn't
http://www.batlabs.com/images/maxrad.gif
Joe M.
jay_kruckenberg wrote:
Does anybody have the microphone pinout of the Motorola MaxTrac
radio? I need to know what pin has what signals on it.
Yahoo! Groups Links
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Good advice, but he already acknowledged receipt
of my MO. I should have mentioned that before.
Also, thanks for all the replies. It seems this may be a case of someone
who is just too busy for all the work he has to do. Many other people
are in the same boat I am, it seems. I have yet to hear
for programming through the mic port in the Phoenix series
(non-xtal, of course) and the MLSs.
Joe M.
[EMAIL PROTECTED] wrote:
-Original Message-
From: mch [mailto:[EMAIL PROTECTED]
Sent: Saturday, November 13, 2004 11:57 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater
No, not all of those models have 16-pin accessory connectors. In fact,
some of the models listed could have either a 5-pin or 16-pin connector.
Joe M.
Duane Hall wrote:
I am looking for a complete list of Motorola mobile radio models,
(conventional and trunked) that have the 16 pin accy
There is also a PC program for the MLS-1s.
Joe M.
[EMAIL PROTECTED] wrote:
The MLS240's use an eprom which is programmed with a self contained
special suitcase programmer. The MLS241's are programmable through
the mic connector with the level converter, a PC and software. I've
tried
That's how I usually do it. ID without CTCSS and keep the ID as short as
possible (IOW, no /A, no DE, no /RPT or /LINK) - just the callsign, and
keep it at 20 WPM. Yes, on those who keyup immediately, and capture the
IDing site, you may hear part of an ID, but only for a second at most.
An easy
Not for several years now. They changed to PCIA.
Joe M.
Q wrote:
Ironic that the one certifiying organization is called NABER!!!
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Perhaps I should add that the callsign must be of the appropriate class!
There are still be novice licenses out there that aren't legal on 2M.
:-)
Joe M.
mch wrote:
It is perfectly legal to use ANY valid ham callsign on your ham
repeater. Whether or not it jeopardizes your coordination
I would estimate it's a PLL problem.
Joe M.
Chuck Kelsey wrote:
But would an intermittent antenna connector cause the TX light to go out as
well? I'd guess not, but maybe. In any case, when it quits, the TX light
also goes out.
Chuck
- Original Message -
From: Mike WA6ILQ
First of all, the 4AT is one of the early synthesized portables. SWR
shutdown wasn't real big back then. Also, I don't know of any ham radio
that entirely shuts the TX down. Even a commercial Motorola MTR2000
won't do that. They cut the power way down, but don't shut the TX off.
While I'm sure
Not just the lake. I heard repeaters in Detroit, then another in MI
twice as far away - both full scale.
http://home.cogeco.ca/~dxinfo/tropo.html gives a great prediction of
tropospheric openings. Looks like PA will be 'out of the loop' for a
while.
Joe M.
Q wrote:
From Erie Pa I am hearing
Are you sure about the in/out configuration? I have one that is 51.400
in / 51.900 out. Where are you located?
Joe M.
Mike Perryman wrote:
I am hoping I can bring it
into a useable range (51.9 in / 51.4 out) by modifying the coupling
loops...
Yahoo! Groups Links
* To visit your
Jeff,
Your depolo.net email address is not DNS-ing according to my email
server. Please send me an alternate address. I need to send you an
important email. I don't think your 'off...' address works anymore.
Thanks,
Joe M.
Yahoo! Groups Links
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While the 16 pin connectors will work (as long as you don't need to use
pins 17-20), CDMs have 20 pin connectors. Any part numbers
(non-Motorola) for those?
Joe M.
Phil Hebert wrote:
From a previous post:
Subject: Re: Motorola 16 Pin Accessory Plug Part # Digi-Key
For anyone who would
On a related note to the accessory connector, it seems only flat
(non-de-emphasized audio) is available at the rear connector. To get
de-emphed audio, you have to go to the speaker which of course varies
with the volume control.
Does anyone know anything different about a way to get constant
and squelch controls, the frequency
steering, and the on/off controls - same as any other.
Joe M.
James wrote:
If I remember right, there is still brains in the clamshell head. If
you use just the box, I'd be curious if it would work.
James
mch wrote:
Not really - just reprogram
Simple answer: You're not receiving a police transmission. You're
receiving a retransmission of a police transmission. It's like a ham
repeater. Anyone on a repeater is not listening to the ham's signal -
you're listening to the repeater's signal.
Joe M.
[EMAIL PROTECTED] wrote:
Just
significantly off topic.
Joe M.
Roger Grady wrote:
At 12:59 PM 10/10/04, mch wrote:
Simple answer: You're not receiving a police transmission. You're
receiving a retransmission of a police transmission. It's like a ham
repeater. Anyone on a repeater is not listening to the ham's signal -
you're
:37 PM
Subject: Re: [Repeater-Builder] Off topic a bit.
At 12:59 PM 10/10/04, mch wrote:
Simple answer: You're not receiving a police transmission. You're
receiving a retransmission of a police transmission. It's like a ham
repeater. Anyone on a repeater is not listening to the ham's
If you have a PRO-96, there is a Niagara region (USA and CA) file on the
PRO-96 Yahoo Group. Also, make sure you have a copy of your license in
case you get stopped in NY and don't have the PD frequency blairing
(shut the scanner off). From memory, the western part of the state all
uses 155.505
Along similar lines, has anyone ever tried upgrading the Maxtrac to 99
CH? There was a special model made by Motorola to do that, but I think
it was a Low Band model. The problem is that the firmware is almost
impossible to find and the software (RSS) is even more difficult.
Joe M.
Jim B.
Have you contacted the major distributors? (Tessco, Hutton, Etc.)
Joe M.
tgundo2003 wrote:
As per recommendations on this group I have settled on a DB-408 for
my new UHF repeater project. My problem is I keep running into dead
ends in locating one, new or used, to buy cut for the ham band.
TX-RX, but if it the existing setup works... :-)
http://www.txrx.com/
http://www.txrx.com/demo/rf_sys_products_cb.asp?id=23
Joe M.
ve3iny wrote:
I have two repeaters, one running 144.67/145.27, the other running
448.8/443.8. I use a ham grade diplexer (Daiwa or MFJ or something)
to
I would recommend lightning protection (specifically Polyphasor). Since
it should be at the enterance to the building, and the duplexers (the
two on the repeaters and the one combining the repeaters) should all be
inside the building, they would all be protected. That should eliminate
the
The only one I can think of is the ACC RC-96. It does
up to 3 dual-segment tone segment CTs and I think 8 PLs.
Joe M.
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Maybe not the answer you want to hear, but have the uncoordinated
repeater (147.300 or 146.670) solve the problem. If that means moving
location farther away, so be it. ;-
As for the technical side, it may help, but it all depends on where the
mixing is happening.
Joe M.
Q wrote:
Trying to
By that statement, you are saying that the 146.670 repeater is
coordinated? If so, what is the callsign and location? eMail me
privately if you wish.
Joe M.
Q wrote:
Unfortunately,only the 147.30 is un-coordinated. Now for the
politics of the hobby...
- Original Message -
From:
The HIGHEST repeater I can think of would be in Colorado, or the Rocky
Mountain chain somewhere. I'm sorry this doesn't answer your question,
but I bet it helps others understand what the question is. :-)
Of course, an OSCAR unit would be the highest repeater, but that's not
just limited to the
The Zetron only does a one-beep CT, doesn't it?
He said he has a Zetron now. (or a TP-154)
Joe M.
Maire Company [EMAIL PROTECTED] wrote:
I would say look into Zetron model 38 or high end 48
John
- Original Message -
From: DIGITEL S.A.
To:
Tim S. wrote:
-Original Message-
From: Paul Kelley [mailto:[EMAIL PROTECTED]
What is the SWR looking into the duplexer?
Did not check that. What should it be? I assume 10% or less reflected.
4% is 1.5:1 (100W out - 4W back OR 50W out - 2W back)
It should be no more at the TX
or you're most likely in violation of FAA rules anyway. ;-
Joe M.
Nate Duehr wrote:
mch wrote:
If you have daytime strobes, that's the reason the paint isn't required.
You have to have the tower painted (correctly) OR use daytime strobes.
At night, you have to light it using red or night strobes
Paul Finch wrote:
20 feet, seems kinda crazy to me but that's the Government for ya!
Yep. They probably went by the slide slope (or whatever the other side
of that is called - the rise slope?) and it came out to 190 feet at that
distance.
They also required that it have red lights at
Mr. Edgar McKinney wrote:
The painting was wavered in our case cause of the tower material could
not be painted.
At each 50' and 100' are stable reds on with flash strobes for day
use.
If you have daytime strobes, that's the reason the paint isn't required.
You have to have the tower
That's NOT a good idea. The vibrations from wind and such will either
loosen the connector (causing duplex noise) or crack the outer conductor
on the Heliax (causing duplex noise). ALWAYS use a flexible cable when
going from Heliax to an antenna. LMR400 should do nicely.
Of course, a quality
The low split (30-36 MHz) models should tune to 10M fine. The high split
(42-50 MHz) models MAY tune to 6M fine - depending on where your
repeater is located frequency-wise.
Joe M.
k9apr wrote:
I would like to know what it will take to setup a 10 meter repeater.
Such as the GE Mastr II will
That would have been using a GLB synthesizer?
Joe M.
Ken Arck wrote:
Hi folks
Is anyone aware of the earliest use of a synthesized remote base on an
amateur repeater? One that allowed full frequency agility?
My take is that it happened in 1976 (and of course, I think I know who did
it
Not all CSIs are gone. http://www.connectsystems.com/
Joe M.
Jim B. wrote:
Mark Holman wrote:
Comm Spec is still around,
But CSI is not. They went out of business about 10 yrs ago.
--
Jim Barbour
WD8CHL
Yahoo! Groups Links
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.
Paul
-Original Message-
From: mch [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 09, 2004 8:57 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Midland Community Tone Panel
Not all CSIs are gone. http://www.connectsystems.com/
Joe M.
Jim B. wrote
Inc. as well as Communications Specialists Inc. are still in business. They
have nothing to do with the subject at hand.
Paul
-Original Message-
From: mch [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 09, 2004 9:25 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re
Here (attached) is their logo.
Joe M.
Jim B. wrote:
I have never heard Connect Systems call themselves 'CSI', so as far
as I can tell, when someone says CSI in talking about tone panels,
they mean Communications Systems.
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Paul,
That's why I put the smiley. I meant no offense.
Honest mistakes happen. No biggie. (I was surprised when you
did it the second time, however, even after my attempt at humor)
Ralph M. ;-
Paul Finch wrote:
Jim,
My apologizes, I wanted to put Joe and put Jim. Mine was an honest
Not as far as standard Land Mobile use goes.
Highest band for that is 900 MHz.
Joe M.
Maire Company wrote:
anything like business above it?
- Original Message -
From: mch [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, September 04, 2004 5:42 PM
Subject
Hams are just below that - 1240-1300 MHz.
Joe M.
Maire Company wrote:
does any one know what uses the 1,300.000 freg band? have a customer
that wants a scanner and thinks that is the place to go? any
thoughts?
thanks John
Yahoo! Groups Links
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Sent: Saturday, August 28, 2004 2:34 PM
Subject: [Repeater-Builder] Re: db comparisons
--- In Repeater-Builder@yahoogroups.com, mch [EMAIL PROTECTED] wrote:
You can gain 3dB by either doubling your power (or ERP), or by
doubling the antenna height
That's so they 'receive better' than the competition. ;-
Joe M.
Bob Dengler wrote:
The S-meters on most of my VHF/UHF ham gear seem to hit max.
indication around 10 µV.
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Without getting into a 'that's what the rules are' discussion, I'll add
that it's technically impossible to make a repeater adjust the power
output since there are users (and more importantly control ops) who are
receiving only and not transmitting. If everyone were transmitting, it
is possible,
No, it won't. 3dB will give you 1 s-unit increase and slightly more
range, but nowhere near double.
Joe M.
ian wells wrote:
just a quick question
can anyone give a idea of difference of range when swaping a 6db base ant to
a 9 db ant.
would it be close to 2x the range in kms
Yahoo!
, you'll probably be able to hear 3 dB, assuming you are not already
full quieting.
Chuck
WB2EDV
- Original Message -
From: mch [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, August 28, 2004 1:59 PM
Subject: Re: [Repeater-Builder] db comparisons
I've always
I've always been taught and read that a 3dB increase (or decrease) is
the point at which the user can first notice that the signal has
changed. You can gain 3dB by either doubling your power (or ERP), or by
doubling the antenna height. Of course, this does not take hills into
account where your
Maybe the repeater RX is 3-13 dB hotter than most user RXs? ;-
As for T.E. Systems, I was turned off on them after one of their
amps caught fire and almost burned down an equipment shelter. 8-[
(Terribly Engineered Systems?)
Joe M.
Neil McKie wrote:
Are the repeater users using 130 or 500
There are some repeaters that use yagis - mostly in terrain such as you
describe. I don't know about the stacking, but stacked or not, the yagi
will 'aim' your signal where you need it. After all, there is little use
'pounding' your signal omni into the sides of the mountain. You may as
well get
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