ats something I suppose.
Jesse
On Tue, Apr 27, 2010 at 8:44 PM, Gerald Pelnar wrote:
>
>
> Got tower?
>
> On a high spot?
>
> It gets hit!!
>
> If you can't tell, that's a good thing.
>
> Gerald Pelnar WD0FYF
> McPherson, Kansas
>
>
>
Hey All,
I am trying to think of a way to detect if a tower at one of our sites
gets a direct hit. I was thinking of paralleling a ground strap with
a 10mA amp glass fuse. Maybe make the two connections to the ground
stap 2 ft apart and use a fuse holder for fuse testing and
replacement. I susp
That answers it, thanks.
On Sat, Mar 20, 2010 at 10:11 AM, Jeff DePolo wrote:
>
>
> > What happens if I have a strap running horizontally nailed flat on a
> > wall and I need to go vertically down with another strap to tied onto
> > it making a T. This vertical strap would also be nailed flat
Hi All,
I'm going to be installing a bunch of 3" copper ground strap in my ham
shack. When running the strap I've read that sharp turns are bad and
a minimum bend radius of 12" should be used. This is fine if I need
to bend the strap in the one direction.
What happens if I have a strap running
Hey All,
I am thinking about lightening protection for a site and using 1/2
copper pipe runs rather than a heavy guage wire like 2/0. 1/2 copper
is about $2.20 a ft, while 2/0 is about $3/foot... and 2/0's diameter
is about 0.36 inches so bang for the buck 1/2 copper pipe seems the
way to go. I
Hey All,
I was having a discussion with a fellow tech and the topic of IMTS came up.
Does anyone here remember the reason for the strange channel designators?
JL YL JP YP YJ YK JS YS YR JK KR ? Why YL... why not channel B or Ch 2, they
must mean something...
Jesse
Hi all,
I acquired a Comprod equivalent to the SRL235-2. Basically the same, just
heavier duty and the cabling harness is in the boom. Anyway, which way is
it directional? In the case of this picture of one
http://www.repeater.n1bug.com/sinclairant.jpg is it diectional through the
dipoles, or
Hey all,
I acquired a couple old Motorola voter cards, a couple command modules and
an old card cage and I'm going to make a ham project out of them. I've been
reading on how to modify them for COS switching rather than the Motorola's
tone style, which seems simple enough. I was wondering though
The motorola power supply supplies 9.6 and 13.6 VDC to the micor. The
battery bank should work fine for the 13.6 V source, and just use a
9.6 V regulator. You may want to add a couple filter caps to get rid
of noise that may be present from your charging system.
The old micor power supplies I am
Hey guys I was asked if it's possible to narrow band a MSR 2000 (12.5
KHz ch spacing, 2.5 KHz max deviatation). I don't see why not, just
turn the IDC down and setup the audio, is it not that simple? I
suppose you wont have the option of companding the audio, but if that
was done at the originati
Hi All,
Have a question regarding programming an analog (CLB) MSF5000. I'm
going to be hooking it to a RLC4 controller. I'm making a programming
worksheet, so when I send the PROM away it'll get programmed
correctly. I've got PTT priority (8.6) to LW (Local and Wireline),
repeater activation (8
> --
>
> *From:* Repeater-Builder@yahoogroups.com [mailto:
> [EMAIL PROTECTED] *On Behalf Of *Jesse Lloyd
> *Sent:* April 14, 2008 19:44
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis
ny VE3DWI
>
>
>
>
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Jesse Lloyd
> Sent: April 14, 2008 13:23
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis
>
>
>
>
>
ged though the whole system.
Am I right?
Jesse
On Mon, Apr 14, 2008 at 10:23 AM, Jesse Lloyd <[EMAIL PROTECTED]> wrote:
> Hey all,
>
> MSR2000 does the exciter do any pre-emphasis, or is the repeater
> designed to use flat audio stock from Motorola? I know the local
> s
How much do you want for it?
Jesse
On Sat, Apr 12, 2008 at 2:15 PM, Mike Mullarkey <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
>
>
>
>
> I am going to sell my bench service monitor. It is in excellent shape and
> has the factory bag with it. I am going to place it on Ebay if anyone here
> on the list is
Hey all,
MSR2000 does the exciter do any pre-emphasis, or is the repeater
designed to use flat audio stock from Motorola? I know the local
speaker de-emphases audio, but repeat audio, does it get de-emphasised
then pre-emphasised at the exciter?
Thanks,
Jesse
I would like a couple receivers if possible. I have 6 Canadian low band UHF
repeaters, the receivers won't tune up. Also what do you have for PA's?
Jesse
On Nov 12, 2007 10:45 AM, Maire-Radios <[EMAIL PROTECTED]> wrote:
>*Looking to clean house of some Micor repeaters some are working
r those PA's as-built. And to add to the mix... many of those
> PA's are the low power ~40 watt packages. Trying to find the 110
> watt low range UHF PA is right up there with "hens teeth".
>
> cheers,
> skipp
>
>
> > "Jesse Lloyd" <[EMAIL PR
Hey all,
Was there ever a MSR 2000 built that covered the low UHF split 410ish to 440ish?
I know of the 450-470, 470-494, 494-512 splits, but is there another
low band one?
If so does anyone know the receiver part and PA part numbers for it?
Thanks,
Jesse
Don't worry I knew what you meant by 10 MHz. Also as far as I know these
generators will go from DC and up.
On 8/21/07, Jesse Lloyd <[EMAIL PROTECTED]> wrote:
>
> Well it kinda depends on features and if you need to lug it around with
> you. I use a 1200 Super S (1200 wit
Ya, in a nearby town the hams did that. We use link communications
controllers that have a serial port for programming on them. They hooked
them up to a TNC which allowed them to change programming remotely. Worked
great. Unfortunately it was before my time, and I wasn't involved in the
specifi
Haha, nice. Another good one is the guys who have had entire boards changed
to silver solder because it "sounds better"... and argue with you to the
end of breath if you ever say it does nothing, and is a total waist of
time. Even the car audio guys are foolish sometimes. Running double ott
cab
. ;-)
>
> I have no pecuniary interest in Com-Spec, Tessco, Hutton, etc... just a
> happy user.
>
> Mark - N9WYS
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.comOn
> Behalf Of Jesse Lloyd
>
> Hey All,
>
> Looking for a microprocessor dri
Hey All,
Looking for a microprocessor driven user programmable CTCSS
decoder/encoder something very simple and ideally cheap. Single
tone, and preferably something with minimal current draw.
Any good manufactures/ models that you would recommend?
Jesse
er www.microwaves101.com
On 9/3/07, Jesse Lloyd <[EMAIL PROTECTED]> wrote:
>
> Sure I suppose... Electronic Communications Systems Fundamentals Through
> Advanced - Fourth Edition. Page 319.
>
> Also I went to microwave101.com for some more info.
>
> Curious why your s
ogle searches?
> I'm interested in your sources.
>
> 73 Allan Crites WA9ZZU
>
> *Jesse Lloyd <[EMAIL PROTECTED]>* wrote:
>
> My source was "Electronic Communications Systems" by Wayne Tomasi from
> DeVry. Copyright 1998. Its my old collage text. Also I gra
ss than the 35 amp
> rated unit and expect it to get really warm/hot in lock to
> talk (long transmit) periods of operation. Enough so that a
> modest ball bearing fan or blower moving air past the heat
> sinks is a good idea.
>
> cheers,
> s.
>
> > "Jesse Lloyd&
Thanks.
On 9/3/07, skipp025 <[EMAIL PROTECTED]> wrote:
>
> Just the PA without anything else
>
> Anywhere from about 8 to 14 amps depending on the source
> DC power supply, the specific install and who sets up the
> equipment.
>
> cheers,
> s.
>
>
>
Yes, unlike cheap imitations which give cubic audio quality, hahah.
On 9/3/07, Laryn Lohman <[EMAIL PROTECTED]> wrote:
>
>
> > If you really need a good chuckle (unless you threw out your tube
> > stock recently) go to ebay and search for a 12ax7. For example
> >
>
> http://cgi.ebay.com/Matche
Hey guys,
How many amps (ish) does a Micor 110 Watt VHF PA take when operating?
Jesse
My source was "Electronic Communications Systems" by Wayne Tomasi from
DeVry. Copyright 1998. Its my old collage text. Also I grabbed additional
information from google searches.
Jesse
On 9/3/07, allan crites <[EMAIL PROTECTED]> wrote:
>
> Ron ,
> Aw c'mon Ron, dig out those equations from
I've got a copy at work If I can remember right... I had to program a Mastr
II E wich I believe uses the same software as the III. I'll take a look.
On 9/2/07, dakaratcaptivereefing <[EMAIL PROTECTED]> wrote:
>
> Can someone point me in the direction of a copy of MastrUtl? Pretty
> sure that
Hahaha a audiophiles... can sell them anything no need for real
physics, just tell them that this device will make things sound better, back
it up with a BS statment that doesn't apply, and charge them 100 bux.
On 9/3/07, Jeff DePolo <[EMAIL PROTECTED]> wrote:
>
>
> > One can see there b
n how the squelch gate card works... does it too do this?
Jesse
On 9/2/07, Jesse Lloyd <[EMAIL PROTECTED]> wrote:
>
> Sounds good, thanks!
>
> Jesse
>
> On 9/2/07, Eric Lemmon <[EMAIL PROTECTED]> wrote:
> >
> > Jesse,
> >
> > I have the
The equation is for characteristic impedance which means a line of infinite
length or one that is terminated with a resistive load equalling the
impedance of the transmission line. An interesting note, twisted pair telco
lines are about 600 ohms at baseband levels but are 120 ohms at DSL
frequenci
lder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Jesse Lloyd
> Sent: Sunday, September 02, 2007 3:50 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Norton AntiSpam] Re: [Repeater-Builder] MSR 2000 R1 Audio
> Squelch
>
> Its a TRN 9689
&
ric Lemmon WB6FLY
>
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:Repeater-Builder@yahoogroups.com]
> On Behalf Of Jesse Lloyd
> Sent: Sunday, September 02, 2007 2:36 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Buil
Hey Guys,
The schematic on the website of this card doesn't have the Intercom
switch/button on it. From what I've read there are 2 versions of this
board, the one published on the site and the one I have. The boards
appear very similar, mine just has a few extra parts on it for more
features I a
I agree skipp, just lube it up and use it... unless it was buried in a pile
of sand I cant see many benefits to cleaning it, other than getting familiar
with the inside of a duplexer. Generally I don't ever open duplexers, a
pain in the neck to take a part and way to easy to mess up putting them b
So to plug some numbers in:
Say you have a cable with the following specs (50 ohm cable)
Capacitance of 100.3 pF/m
Inducatance of 251 nH/m
Resistane of 0.164 ohms/m
Shunt conductance of 12.8 mS/m
Zo = sqrt [ (R + j 2 pi f L ) / (G + j 2 pi f C ) ]
at 100 Hz= 113 ohms
at 1 Khz= 111 ohms
at 1
Ok. Coax doesn't have an impedance at DC it has a resistance.
Coax impedance is found by:
Zo = sqrt [ (R +j 2 pi f L ) / (G + j 2 pi f c) ]
where:
f is frequency
L is inductance
C is capacitance
R is the resistance
G is shunt conductance in mhos caused by the dielectric
j is of course th
lch card and station control module in and take
the R1 audio squelch out?
Jesse
On 8/31/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
>Were you out skateboarding again?
>
>
>
> -----Original Message-
> From: Jesse Lloyd
> Sent: Aug 31, 2007 5:17 PM
&g
ww.radiowrench.com/sonic/so02004.html
>
> cheers,
> skipp
>
>
> > "Jesse Lloyd" <[EMAIL PROTECTED]> wrote:
> > Hey All,
> > Poking about on a MSR 2000, and like the micor it appears to have 2
> > squelches, one in the squelch gate and one in
Wonderful thanks
On 8/31/07, Kevin Custer <[EMAIL PROTECTED]> wrote:
>
> Jesse Lloyd wrote:
>
> Hey All,
>
> Poking about on a MSR 2000, and like the micor it appears to have 2
> squelches, one in the squelch gate and one in the R1 Audio Squelch. I'm
> hooki
Hey All,
Poking about on a MSR 2000, and like the micor it appears to have 2
squelches, one in the squelch gate and one in the R1 Audio Squelch. I'm
hooking it up to a controller and have a choice on which squelch to use...
which is better, and why 2? From what I can see the squelch gate control
Isn't LDF a copper shield with an aluminum core that has copper coating on
it?
Jesse
On 8/30/07, Bob Dengler <[EMAIL PROTECTED]> wrote:
>
> At 8/30/2007 03:45 PM, you wrote:
> >The Wal Mart effect* makes it to the Communications Feed-Line industry
> >(*Global Economy)
> >
> >enjoy,
> >s.
> >
>
Ya I use it at work too. Its better than at least 1/2 of the commercial
products available. Quite amazing considering a Ham out of Quebec
programmed it.
Jesse
On 8/29/07, Nate Duehr <[EMAIL PROTECTED]> wrote:
>
> skipp025 wrote:
> > OK Groovy Guys and Gals,
> >
> > Is there a simple rule o
Ya, duplexers will have insertion loss. Typically you get more insertion
loss with more rejection, so its a balancing act.
Insertion loss can range from .1 dB (very good) to 3 dB.
Typically if I can get a duplexer to less than a dB I'm happy.
*Insertion loss (dB) = 10 log ( P**IN** / P**OUT** )
I use Radiomobile for all my plots. Works great, but there is a bit of a
learning curve. It plots paths over dted and srtm elevation data and is
quite good at guessing rx strength.
For basic radio range it depends on line of sight so greatly that you really
need something that will take hills in
I hope your printer has a lot of paper Randy, This will be the 61st message
sent :)
Jesse
On 8/29/07, R. K. Brumback <[EMAIL PROTECTED]> wrote:
>
>Quote*: "**If there weren't resistors in there too, transmission lines
> would have no loss."*
>
>
>
> Yes, with a perfect Z, resistance would be
gt;
> 73
>
> Gary K4FMX
>
>
>
>
> --
>
> *From:* Repeater-Builder@yahoogroups.com [mailto:
> [EMAIL PROTECTED] *On Behalf Of *Jesse Lloyd
> *Sent:* Monday, August 27, 2007 11:48 AM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:*
The length of coax doesn't effect impedance. Trimming the coax effects what
is read on the VSWR meter because what is actually happening is that there
is an interference pattern created when you have a mismatch on the end of
feedline. This pattern is sinusoidal and changes in voltage and current
The whole problem here is the comparison between high impedance twin lead
and low impedance coax. Is the difference of impedance really coax
attenuation? If you kept I equal between twin lead and coax who would win?
Also impedance shouldn't change because of frequency (with the exception of
extre
ne freq and the same
> current at a higher freq the losses will be different. This was my point.
>
> 73, ron, n9ee/r
>
> >From: Jesse Lloyd <[EMAIL PROTECTED] >
> >Date: 2007/08/26 Sun PM 02:34:41 CDT
> >To: Repeater-Builder@yahoogroups.com
> >Subject: R
I^2R losses do change with frequency because of the skin effect.
On 8/26/07, Ron Wright <[EMAIL PROTECTED]> wrote:
>
> Jeff,
>
> The low shield coverage is one reason I do not buy cables with
> pre-installed connectors unless I know the cable...not just because it says
> RG8 or whatever.
>
> I
l... nor will you get the 415 MHz
> receiver up to 445 MHz without much serious effort.
>
> Better to trade and/or find replacement receivers.
>
> The out of range PA's should be operated at much reduced values
> and or modified... which includes work in the harmonic filter
Braided coax does radiate a little, there is no such thing as 100% braid.
Thats why in the cable TV industry they have to use double braided coax in
the headend, otherwise you can have a hell of a mess of stray RF in there.
Coax loss is due to I^2R losses and radiation (and connector loss but that
Hey all,
Does anyone know the bandsplits for the UHF MSR 2000, or a web page that has
a model no. reference chart?
Thanks,
Jesse
Ya you should be able to trim your coax so the transmitter "sees" 50 ohms,
which should be every 1/2 wave. All this does it protect the transmitter,
the standing waves are still there, they just gets dissipated/radiated by
the coax.
Also with cans usually, if I have enough time on my hands, I tun
Hello All,
Here's a long shot, does anyone have a VHF or UHF Quantar sitting around
that's willing to part with it? (don't laugh you never know :) ). I need to
be able to move it into the ham band too.
Jesse
s in the best efficiency, and since
> you won't have excess power to burn in a solar situation, the method I
> suggest is likely better.
>
> Jesse Lloyd wrote:
>
> That PA mod is awesome. I was considering knocking down the power out of
> the exciter to 20 mW by increasi
h only one transistor (the
> controlled stage) and created a .5 to 2 watt PA.
>
> The exciter shouldn't be drawing current when not transmitting, because
> most of it is switched power, and the rest is Class C.
>
> Hope this helps...
> Kevin Custer
>
> Jesse Lloyd wr
Hey All,
A while back I built a Micor Repeater. And had all sorts of fun with the
squelch circuit. Why is there 2 squelches on that unit, 1 for audio and one
for PTT control? Also Keyed A- and Keyed A+, where are those control lines
generated from, which transistor is it that sinks current for k
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