--- Mark A. Holman [EMAIL PROTECTED]
wrote:
Yep I even recall the Novice Class I had back in
1976 we were discussing the
KC's , MC's to Khz. and Mhz.
was on the exam probably.
Then the material was probably out of date. The CPS
to Hz was made in 1967. Almost 10 years before your
Novice
--- [EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
One thing I've never been able to explain to people
is: Why do the big Celwave, Sinclair, etc.
StationMaster type antennas have only 5.2 dB gain?
Actually, the 2-meter range ones are listed as
typically having only 4.8 dB gain, after putting the
--- Nick Papadonis [EMAIL PROTECTED] wrote:
Hi Folks,
Is anyone aware of either hardware or software
components to decode PL
tone, DTMF and CTCSS? Open source software is
preferred.
I'm interested creating open source repeater
controller software.
Uncommon features may include,
--- Steve Helton [EMAIL PROTECTED] wrote:
It is my understanding that you can NOT replay the
weather alert message on
an amateur repeater but rather can only use the
monitor radio to activate a
message indicating WEATHER ALERT - LISTEN TO NOAA
WEATHER RADIO FOR MORE
INFORMATION. We have
--- NØATH [EMAIL PROTECTED] wrote:
Not quite on topic - But I can send any one who
would like it a picture of a Rohn 25
with the top neck twisted out of it because of such
an antenna mounted on the top neck.
Please mount these on one of the top legs or if
center mounting, mount on a
--- Michael Singewald N1PLH [EMAIL PROTECTED]
wrote:
OK, this is making me nuts. I have changed jumpers
about 3 times
thinking I have a cable problem but I am convinced
it is not the
cable. Here are the symptoms:
220 Hamtronics receiver (very old, no labeling on
the board). Tunes
--- Al Wolfe [EMAIL PROTECTED] wrote:
Group,
My comments about RG-8X coax are based upon my
limited exrperiance with
it. I have never owned any or used any that I
remember. The stuff that I
have examined all seemed to have a very open weave
to it. The only connector
I know of
--- n2odw [EMAIL PROTECTED] wrote:
Hello to the group,
I'm new to this group and also new at trying to
build a repeater
system. My main question is about line lost. Could
anybody tell me how
to figue out line loss out for the purpose my
repeater application and
for the use of
- repeaters are expensive. Expect at the very least
to spend $4-5k
for a very simple building top site, more if you
need to climb
towers, etc. Actually, most of my money for a
repeater goes into the
controller, duplexer, feedline and antenna. The
actual radio portion
is only 15-20%
--- w9mwq [EMAIL PROTECTED] wrote:
Just need a short memory replacement here please.
I'm working on an
Astron 35 amp power supply, hope to get it going
again. I'm
checking the transistors in the unit, and not sure
if I remember
correctly. On my vom, in the diode checking
--- ad5oj [EMAIL PROTECTED] wrote:
I am building a 2m amateur repeater with out a
duplexer and am using
vertical seperation instead. I have two 2m Handheld
radios placed
with seperate antennas on a tower instead of placing
them at the
bottom of the tower. I am having trouble
--- Mathew Quaife [EMAIL PROTECTED] wrote:
Thanks Chuck and Kevin. Found them on the net.
Dang, $2.00 a foot, must be
made of GOLD...Ah well, gotta have it.
Here is anothere place. Just be sure to ghe the mill
spec instead of the comercias grade. One is about #
1.88 per foot and the
--- w9mwq [EMAIL PROTECTED] wrote:
I know I've brought this subject up before, but have
lost all the
emails about it. I need some help building an RF
Coupler Iso-Tee to
begin learning to adjust duplexers. Someone gave me
some
instructions on how to build one out of a
--- JOHN MACKEY [EMAIL PROTECTED] wrote:
Right, what you posted is what I had always known.
But now that I am looking
in order books for Newark Allied, I can't even
find
anything listed for millihenries, only
microhenries!!!
For the Newark online catalog use 2200 u henries or
--- Coy Hilton [EMAIL PROTECTED] wrote:
Well, you should get it right. It has never been a
first class
Technicians license... Or ony class TECHNICIANS
LICENSE. We who had
to take the exams to get them knoww what they
are/were. I still give
exams for the General Radiotelephone
--- Kevin Natalia [EMAIL PROTECTED] wrote:
Hi All,
I need a simple interface for a 600 ohm output radio
to a controller which accepts 10k ohm.
This is a RX not TX.
I don't want to make a circuit board if I don't need
to.
Any ideas?
Just hang a resistor of about 600 ohms across
That's not meant to be an argument against using
tone, just pointing out
one of the problems. Two possible solutions are: 1)
A common tone defeat
code on DTMF which would allow a transient user to
at least access the
repeater long enough to hear the announcement (there
are a couple
---
Yes, I do think repeater building is about keeping
up with the technology and
building quality machines. Being a 40+ year veteran
of commercial two way
radio, I cannot comprehend someone not wanting to
use 30 year old technology
(as you put it.) As well, I can't comprehend someone
--- russ [EMAIL PROTECTED] wrote:
I buy all my repeater antennas from Cook Towers.
They have them in stock in
the Ham bands and discount to us Hams.
Good luck and 73,
Russ, W3CH
- Original Message -
From: Ralph Mowery [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
--- rtoplus [EMAIL PROTECTED] wrote:
Ralph
If Derwood hasn't contacted you yet, he will. I
gave him the info
via email yesterday.
73
Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892
I have not been contacted by Derwood yet, but he
probably did not know I was off today and I
I have seen this discussed before but looked in the
past messages and could not find it.
Where are some places to buy the DB224 exposed 4 bay
dipole antenna that will work in the 140 to 150 range
for a ham repeater ?
If this is not the best antenna for under $ 1000 then
what other opinions are
--- na6df [EMAIL PROTECTED] wrote:
Not repeater related so much, but I thought the
great minds here
might know...
One of my corporate bosses, a ham, is having his
bridgestone tires
generate static while they are rolling, interfering
with AM radio
reception. I know somebody used
Many, if you do not think bare minimums are enough.
I hire
broadcast engineers for my company. We look real
closely at licenses and
certifications. While the FCC no longer requires
the GROL for domestic
broadcast, it is a definite plus on a resume. It
shows the person has a
--- Richard MI Ranta [EMAIL PROTECTED] wrote:
Hello folks!
I am hoping that someone might be able to help us.
Our Astron RS-35M power
supply died, and we can't find the schematic. Our
E-mail going to Astron is
being returned!!!
Go here and look under Astron.
--- Steve Rodgers [EMAIL PROTECTED]
wrote:
Soneone correct me if I'm wrong, but another thing
to look out for is the fact
that this setup might be deemed to be a station in
auxillary operation. In
part 97 if one of the repeaters is on a pair under
222.5 MHz you cannot
control the
--- Charles Miller [EMAIL PROTECTED] wrote:
Larry,
Doubling the antenna height does not always increase
the gain. It does help
in most cases but if the antenna's are line of sight
it makes little or no
difference.
Charles Miller
WD5EEH
It is well established if the antennas are
--- Al Wolfe [EMAIL PROTECTED] wrote:
Actually, the old standard was 6 db per S unit.,
but then there really
never has been a real standard for S units that
anyone has followed.
I hate it when someone mentions dB and Sunits at the
same time. There is no standard for s units to dB.
--- Chuck Kelsey [EMAIL PROTECTED] wrote:
Yes, that's what the book says.
However, I'm talking about someone out in a mobile
environment where you
have many other factors in play, including ambient
road noise. Most people
are hard pressed to be able to notice a 6 dB change
under those
Last time I was at Costco, could buy Norton Internet Security for
$50 something with a $15 mail-in rebate.
Neil
Ken Arck wrote:
At 11:37 AM 5/10/2004 -0600, you wrote:
For further details see the attachment.
---Personally I think anyone who's connected to the
In fact, you'll actually be exceeding limits because that +/-5 Khz is
TOTAL deviation-including CTCSS/DCS/whatever! And since the spec for
CTCSS/DCS is +/-500 to 800 hz, and the spec for LTR signalling is
+/-1Khz, voice deviation cannot exceed +/-4.5 Khz (4Khz for LTR). And
the equipment is
- Original Message -
From: dy3lmk143_13mhz [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, April 19, 2004 7:18 PM
Subject: [Repeater-Builder] Duty Cycle
Transmitter and amplifier manufacturers usually specifies a duty
cycle (i.e. 50W 100% duty cycle) on their
Does anyone have any use for the tone elements like the old Motorola
Pageboy
used before I toss about 100 or so of them ?
They are part number TLN 67098. They are from about 300 to 500 hz in
frequency.
I think the suffix behind the TLN is 4 digits... 6709or 6708
You are correct. The
I'm assuming you are talking about a Ham radio
installation? The BUSIEST repeater around here
*might* get 10% use during an average day, and that
estimation is probably high (2.4 hours a day?).
So the repeater doesn't have to be 100% duty cycle?
It all depends on how long the
Does anyone have any use for the tone elements like the old Motorola Pageboy
used before I toss about 100 or so of them ?
They are part number TLN 67098. They are from about 300 to 500 hz in
frequency.
Yahoo! Groups Links
* To visit your group on the web, go to:
Subject: [Repeater-Builder] Is there a relationship between 147.225 and
146.925?
There are two machines on the same tower on these frequencies with
one antenna about 20 feet directly over the other. Each machine is
putting out about 30 - 50 watts. Each machine plays fine by itself,
but as
Again, I think you're off base with your supposition.
You want us to believe that PM is why we Pre-emp FM.
That's simply not the case. This is not supported by
anything I have ever seen or read, only by you.
Not that I really care but look at this as to why PM was used for the FM
I'm not that familiar with the rules for repeaters on being able to shut
them down (off). We have a 2 meter repeater that can be shut it down by a
phone line. This gets very expensive after years though. Is it legal to just
have a UHF ham receiver set up to shut off the repeater?
YOu can
- Original Message -
From: Eric Lemmon [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, April 10, 2004 11:24 AM
Subject: Re: [Repeater-Builder] repeater control
Alan,
Yes. Part 97 Rules require that the Control Operator be able to shut
down a repeater in the
My opinion here I study the exciter circuitry and determine for
myself whether it is FM or PM ...
Neil - WA6KLA
That is one point that I was trying to make. It is difficult if not
impossiable to tell if a transmitter is FM or PM while receiving a signal
over the air. The only way
[EMAIL PROTECTED] writes:
Why not call it what it is FM and PM ?
Yup, I agree!
Because if you ask John Q. Ham what his radio is, he
will say FM regardless of whether it is really PM or not.
Joe M.
If you ask mr.john q ham , he won't know if it is am, fm,pm or ssb comming
out
The voltage at the tap point is about 7 volts, when keyed it drops to
about
.5 volts, just not enough to get it to key the controller. I looked
for
other sources in the radio, nothing would drop to zero volts.
Try putting a small silicon diode or two in series with the wire. That
should
which I know works on my CSI Phone patch, connect (start) with a 10K
resistor, the part I am lost at is the ground. When you say a pull
down
resistor, is this any different than a standard 1/2 watt resistor? I
appreciate the input here, glad that someone is willing to help.
You will see
-Original Message-
From: ac0y5 [mailto:[EMAIL PROTECTED]
Sent: Friday, March 19, 2004 7:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] (unknown)
What does this toy look like? If itis what used to ba a King I may
be able to help. I know how to program the
Does anyone have any info on a RELM Model LMV2548B ? This is a VHF
transceiver. Google turns up almost nothing.
Mostly interested in reprogramming in a few new frequencies. What
program and interface is needed to reprogram it ?
Yahoo! Groups Links
* To visit your group on the web, go
is it possible to actually read 1662 volts AC on a 600 volt digital
meter by putting ground lead of meter on chassis , and the red
one on pin 1 then pin 9 in the ET-60 TX strip , this doesnt seem
possible to me bit i double checked my house current and it
Has anyone ever tried this???
-Original Message-
From: Chuck Kelsey [mailto:[EMAIL PROTECTED]
Sent: Monday, March 15, 2004 11:57
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] 6M duplexers using C02 bottles ?
Use 'em. And fire extinguishers for 2 meters
Come on now guys.show me a bloke who tuned his FIRST set of cavities
with a QRP tx, a long bit of coax, a tunable rx with a vhf converter, and
a
second hand scope and I will show you some who could end up as a real
engineer, understanding what he is doing.
Remember...the Titanic was
- Original Message -
From: kf4vgx [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 30, 2004 8:22 PM
Subject: [Repeater-Builder] Re: Shorten Tail SQ. on older Repeaters
Send me those leftovers lol !
Yes I will have to look again i think the variable is set
Couldn't agree with you more. The important point is that you can't
insert
an SWR meter or wattmeter in the line to make adjustments and then take it
out. The GE Z-match gives you the directional coupler which gives you a
Why can't you take the swr meter out ? The Z-matcher is after the
Because the meter and its cable's electrical length will change the
tuning.
You can read it at the antenna port of the duplexer if youre using one.
This
has already been covered in previous posts. 73,Lee
I must be dense . From what I understand you have the transmitter (no
tuning in the
My bet would be that the black wire fuse is there for positive ground
vehicles, a vestige of times past. In that case, the black (negative) wire
is hot, and you would need the fuse there.
Bob U.
AA6BT
That is one reason, but the other is for the times you go directly to the
battery with
I'm caught in the middle of a couple of feuding technical experts
on a probably trivial issue.
Some Mobile radio power cords are fused on only the positive line.
Others are fused on both lines.
One's logic is you only need one fuse. The other maintains their
communications shop lost all
Rg-11 right to a box or set top equipment sounds good , but the weight of
the coax will no doubt cause damage to VCR and televison F-connector inputs
when they snap off due to the size and weight. Use quad shielded RG-6 and
with the f-connectors installed correctly, will result in no RFI
My 2 meter link on my repeater is causing TVI. This happens only
on cable ch 18 on Charter Cable here in Yakima, WA. Any one have
any ideas? This is only on the houses, say with-in 1/2 mile.
Sounds like the cable chanel 18 is using frequencies in the 2 meter band.
Have everyone that is
i compared it to a telex hy-gain 8 element vertically polarized of
course...
I dont remember the exact model number but it was the one with the delta
match
coax stub.
I have probalby the same antenna up horizontal that I use for ssb on the low
end of 2 meters. Don't remember the name either
I have 3 diamond hnaX510's and consistantly can reach about 75-100 miles
in every direction with the antenna about 30 foot to the bottom of it,
(roof
mounted)
I compared it to a 8 element beam and it was almost the same signal
strength
as the beam except it worked in all directions.
Sounds
I have seen cross polarized antennas used to receive links around a
large city airport area, the theory is if the path is not consistent
there is a larger capture area available. This will be an interesting
one to follow, I think the coupling loss will become more like -7 to -9
db as it is
That's a hard question to answer. Some preselectors are based upon the
physical package used for mobile duplexers, and may work just fine- but
they are not flexible. I prefer to use an 8 inch bandpass cavity that I
can tune for almost any selectivity and insertion loss that I want. If
It never fails - pose a simple question, and you get a series of overly
complicated answers involving
expensive equipment. To calibrate a local frequency standard, one needs
a short wave rx with an
s meter (mechanical type), and a means of balancing the local standard
signal level with
I would say the repeater system preformance is
not nearly as good at it could/should be.
For the most part 9 miles should be a cake walk on
a well done VHF system as long as the portables
have min 4 watt output.
I would first turn my attention back to the
repeater and antenna system.
And Spectrum sucks-that's why they don't make repeaters any more.
Spectrum doesn't? One of the locals here just bought one ... groan.
--
Jim
Neil - WA6KLA
Here is a link to where you can find the new ones. As if anyone would want
one.
http://www.spectrumcoms.com/#Repeaters
hi,
i install a pa on a Master 2 repeater Low Split Vhf of 105 watts output,
i have try to balance de pa and when we begin to tune the 2 potentiometer
for the matching of impedance of the natenna we hear a tone
FROM the transmit audio of the Master 2.
The duplexer ,6 cans Dodge is in
Why do you believe that double shielded cable is
necessary for an antenna run? What are you trying to
keep the signal out of?
Inter-cabling within the cabinet needs to be double
shielded to prevent interaction between the TX and RX
portions, but once those signals are merged at the
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