We have recently had a couple of instances of severe interference on our
repeater.
1)An energy saving lightbulb- acting as a -600khz transposer 200ft from our
repeater.
2)A Dell computer monitor- again as a transposer, but very strong.
Both instances took some weeks to DF and rectify.
This
If you put a diode in the COR line with the cathode toward the tap point,
doesn't this raise the voltage?
I think the voltage on the anode would be 0.5 plus the diode drop-
Jim, KC1RM
- Original Message -
From: Al Wolfe [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent:
I use a couple of EF Johnson Challenger 71xx UHF mobile radios for
the RX and TX side of one of my repeaters. Obviously there is no COR.
A makeshift COR signal is the busy LED which works to a point. The
busy LED lights up whenever there is ANY AND ALL signals on the
frequency regardless of the
I do not think so on the cars. I think you need to think about Motorola in
the early years. Maggiore was the same in the early years. If it was build
after Paul statrted building them and since 1997 or so they did a 100% turn
around. Ever wonder why the State police in GA stoped useing Motorola
--- bsoutheyoz [EMAIL PROTECTED] wrote:
I am having trouble generating a COR / COS signal
for my new cross-
band repeater project. I do not want to pull my
expensive
transceiver apart to try and locate an internal COR
circuit.
I have seen several commercial circuits that
generate a
Hello Skip,
Very good and well written.
What is going on here of late is Part 17 of the FCC rules that puts a lot of
things back on the owner of the tower site. I my self own a few towers and
the paper work is a pain not like the good ole days when no one cared.
Very best of 73,
Russ, W3CH
-
I think skip is accurate.. it depends on the vintage of the particular
brand... or conversely the operator who sets it up. Any radio can be a
problem, but a few of the dogs can be beaten into submission. I guess it
depends on your threshold of pain.
And yes, skip, I am familiar with the
If you look at the schematic and go to the audio gate on the radio and use
that switching level to switch your transistor buffer you will have a solid
COR and no loading. Been theredone that!
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S#
However, directly taping to the trigger point
with the controller loads down the whole thing
and nothing is received. I've tried using
a radio shack mpsa transistor to make a
transistor switch and still, it loads it down.
The transistor required current to turn it on.
Pulling
In my opinion, the reason someone might change from Motorola to
Kenwood is price ... and perhaps attitude.
Neil - WA6KLA
russ wrote:
I do not think so on the cars. I think you need to think about
Motorola in the early years. Maggiore was the same in the early
years. If it was
Put a diode in series, .7 volts drop,remember?
- Original Message -
From: Mathew Quaife [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, March 30, 2004 12:07 PM
Subject: Re: [Repeater-Builder] WTB: 440 Mhz Receiver with COR
The voltage at the tap point is about 7
At 08:15 PM 3/30/2004 -0500, you wrote:
Put a diode in series, .7 volts drop,remember?
---If in series yes. But since that diode would be in series with (more
than likely) a bipolar transistor C-E junction with its emitter to ground,
that would add another .6 volts to the equation. Therefore he'd
Well I have been given a lot of good ideas here, and will give them a
shot this weekend when I begin to put it all together. I do
appreciate the help here very much.
Mathew
--- In Repeater-Builder@yahoogroups.com, Ken Arck [EMAIL PROTECTED] wrote:
At 08:15 PM 3/30/2004 -0500, you wrote:
does anyone know if its possible to make a icom commercial 400 mhz mobile. ic-u400 into a repeater?? thanks dave kb2znc
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--- Dave [EMAIL PROTECTED] wrote:
I use a couple of EF Johnson Challenger 71xx UHF
mobile radios for
the RX and TX side of one of my repeaters. Obviously
there is no COR.
A makeshift COR signal is the busy LED which works
to a point. The
busy LED lights up whenever there is ANY AND ALL
Anyone around NW Indiana that would be interested in helping me get a
set of duplexers aligned as well as align my receiver and transmitter
as I don't have any equipment for doing this. It would be greatly
appreciated. Thanks.
Mathew
Yahoo! Groups Links
* To visit your group on the
Turn the diode around so it points away from the tap point. Then if there is
any load on it less than a megohm or so, it will be 0 volts when COR goes
low. Might have to hang a resistor on the output of the diode, say 10k to
50k. Think of it as a diode and gate we learned about in tech school eons
I agree.
I have found very few receivers I could not locate a good squelch
logic output easily. I always used the bi-polar transistors (such
as 2N3904 and 2N3906) for the added circuitry needed.
Neil - WA6KLA
Joe Montierth wrote:
--- Dave [EMAIL PROTECTED] wrote:
I use a
Can anyone help me with the specs for a Phelps Dodge Model 458
fiberglass antenna? I'm looking for gain and possible downtilt spec.
Couldn't find anything in Google to help.
Thanks!
- Rob
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Thank you all for your information,
73,
Neil - WA6KLA
Andy Brinkley wrote:
Neil -
Pin #1 (blue) = common
Pin #2 (orange)= 58 watts
Pin #3 (brown) = 100 watts
you can see the manual at:
http://www.galls.com/DOCUMENTS/SK023_PA300.pdf
73's
Andy
Try getting up with RFS. Phelps Dodge was sold to Celwave and then sold to
RFS. They even keep the same model numbers.
Good Luck,
Russ, W3CH
- Original Message -
From: n1nte [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 31, 2004 7:17 AM
Subject:
I did make a portable repeater out of two
U-400s years ago. They worked OK, not super. The nice thing was
that I programmed them as reverse user radios, so they were easy to swap if one
transmitter or receiver failed. Just trade the RF cabling and the
input/output cabling and go. One
The problem was not price. In fact the Kenwood Systems stuff was more money.
When Motorola closed it's service (Factory) state wide service of there
units went away. 2nd was the fact that the new Motorola stuff was not as
good as the older Micros. Ever since mother M stopped building radio's in
Mike Perryman wrote:
Regarding the FCC... this is the product you get when you fill
engineering
positions with politicians (aka Lawyers) and bookkeepers.
my 2 cents..
mike
Very true. My father had a motto (I don't know if it was original or if
someone else came up with it):
brent wrote:
AGREED
PRICE !!! save money = more radio(s)
to me as long as they work to my needs they are all great ! ! Tennessee H.P
went to Kenwood also..had a great package deal.
- Original Message -
From: Neil McKie [EMAIL PROTECTED]
To:
Message: 1
Date: Tue, 30 Mar 2004 08:27:04 -0500
From: Kevin Custer [EMAIL PROTECTED]
Subject:
tony dinkel wrote:
Having trouble retuning a 633 8A duplexer from 10 mHz to 5 mHz split.
Insertion loss seems to be excessive. Does anybody have any experience
with this model in this
This is very true!
If you like LTR they are ok. They just came out with an APCO system and I
under stand they will have 38 new models this year. I saw a demo at a show
it did not look bad but they will have to be out for a while. I have a
Kenwood TK-8150 in my SUV it has LTR (work) HAm and GMRS
Hey gang.
Anyone ever used the arcom communications RC210 controller?
Any thoughts on it?
I'm really curious. I looked at the specs and it seems really slick for
what it does.
Any ideas?
Thanks,
Jed
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Before Phelps Dodge, was known as Communications Products Company.
The model numbers were the same back then too - unlike what I have
noticed as of late with Sinclair.
At one time, you could call the local Communications Products
Company field sales office and give them the serial
If anyone has experience with or info on the WR-155 VHF transceiver
please email me directly. Just a few questions to find answers for.
Sorry for being a bit off topic. :-)
I would not want to interrupt the educational topic of the week!
bruce, ve1ii
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Does anyone have a copy of the manuals for either of these
antenna's? Would be happy to pay for cost of copies and shipping,
any idea where they can be downloaded from the net. Thanks.
Mathew
Yahoo! Groups Links
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I just got the papper work on a DB-420 from Cook Towers.
73 Russ,
- Original Message -
From: w9mwq [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 31, 2004 1:20 PM
Subject: [Repeater-Builder] DB-304 DB-420 Product Manuals
Does anyone have a copy of the
There are still a ton of MASTR II repeaters out there in 'part 90 land'.
The FCC now demands that you replace them even though the rules have not
changed??? (they still meet current specs).
I also have to admit that I never knew there was a 'list' of acceptable
equipment. I thought there were
Russ, you need to get hold of a spell checker. :-)
(or not have it automatically 'fix' all the things it thinks is wrong.)
Joe M.
russ wrote:
The problem was not price. In fact the Kenwood Systems stuff was more money.
When Motorola closed it's service (Factory) state wide service of there
At 11:01 PM 3/30/2004 EST, you wrote:
does anyone know if its possible to make a icom commercial 400 mhz mobile.
ic-u400 into a repeater?? thanks dave kb2znc
I seriously doubt it. The scheme the U400 uses in its synthesizer
makes it impractical.
Ken
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