Hey Ken, Are you going to Dayton this year? I'd like to meet up and
have you take a look at what I have been working on.
Ken Arck [EMAIL PROTECTED] wrote on 05/10/2004, 07:42:46 PM:
At 11:37 AM 5/10/2004 -0600, you wrote:
For further details see the attachment.
Yahoo! Groups Links
*
Ok, So you can make some kind of filters by placing a T in line with a piece
of equipment and cut the Coax for 1/4 wavelength at the desired frequency.
But What is the difference between a shorted stub and an open stub?
Also does coaxial size determine bandwidth, and if so does anyone have a
__
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No man, 3/4 wave stubs. And about 6 of them.
Coy Hilton [EMAIL PROTECTED] wrote:
IF you plan to make a duplexer for two meters using 1/4 wave stubs
with standard 600Kc split forget it ! Stubs are Great for out of
band filtering but are too broad for use at 600 KC splits. I used a
1/4 wave
I suggest running 2 MASTR-II 110W power blocks in phase with a combiner network
on the input and output. This would give 200-250W output with about .5 - 1W in.
My current single block on the continuous duty heat sink gives an honest 150W
at the moment so this may also be enough for your
I developed and use Squelch Faking. I have a tone generator at 6000 Hz that
runs down the link TX whenever COS is not present, deviates the transmitter
about 1.5 KHz. This fools the squelch circuit in the reciever to close becuase
of the high frequency component and has the added advantage of
This is likely your problem, there is a 620 ohm resistor in the Mic hi line of
the GE MASTR-II PLL exciter connecting the audio line to +10V to provide
microphone bias voltage. Unless this resistor is removed +10 will ride down
the audio input wire to what ever is connected. Problem is you
I just made some cables for my repeater to replace the RG-213 between duplexer
and radios. The only double shielded coax I could find locally from my Hook
up was something called Certified Quality Flexi 4XL 8IIA. It looks like a
flexible version of 9913 with a stranded center conductor
I never understood either why 214 is quoted as 99% shield with it's 2 braids. I
would think it would be 100% with lots to spare.
The 100% shield designation comes from having both a braid and a tape shield.
The tape is theorietically the 100% shield and the braid is placed over it to
act as
Revival!
Sorry, My nutscrape account decided to bounce all the emails from the
reflector for the past 2 days.
To answer some questions:
This is an RC-850 with the VRT and Autopatch boards installed, no CIB
or front panel.
The repeater is on 146.64 TX, 146.04 RX.
I am presently using the same
You should of stopped by the station and said hi.
On Wed, 08 Dec 2004 11:55:19 -0500, Jim B. [EMAIL PROTECTED] wrote:
Tedd Doda wrote:
On Wed, 8 Dec 2004 11:02:45 EST, [EMAIL PROTECTED] wrote:
They are so UN-cool.
I agree Garynothing beats the sound of an North
American
KGMN-FM located in beautiful Kingman, AZ.
On Wed, 08 Dec 2004 13:11:13 -0500, Jim B. [EMAIL PROTECTED] wrote:
DCFluX wrote:
You should of stopped by the station and said hi.
station?
--
Jim Barbour
WD8CHL
Yahoo! Groups Links
Yahoo! Groups Links
* To visit your
highway was two lanes and there were no stop signs in town.
I'd bet someone has throughly wrecked that since.
Neil - WA6KLA
DCFluX wrote:
KGMN-FM located in beautiful Kingman, AZ.
On Wed, 08 Dec 2004 13:11:13 -0500, Jim B. [EMAIL PROTECTED] wrote:
DCFluX wrote:
You
What you should do is have the remote reciever have a VHF transmitter
into the VHF sides RX. What you do then is run the remote RX on the
opposite offset to the repeater. For example when the user wants to
come in on the remote, he switches to the + offset instead of -.
You would need to build
Has anyone had to remove a piece of RG-213 from service? If so for
what reasons? I think I got a cursed piece between my duplexer and
antenna.
Yahoo! Groups Links
* To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
* To unsubscribe from this
and cable
connectors. The single shield only seems to make a
difference when you have marginal isolation in your
system and every dB counts.
73, Joe, K1ike
--- DCFluX [EMAIL PROTECTED] wrote:
Has anyone had to remove a piece of RG-213 from
service? If so for
what
Not the radios,The PC with the controller is.
On Tue, 14 Dec 2004 17:19:49 -0800, Neil McKie [EMAIL PROTECTED] wrote:
Is this repeater water cooled?
Neil
Jim B. wrote:
DCFluX wrote:
This piece of coax that is the run between the antenna and duplexer
was absconded
-shielded cable or Andrew LDF-2 or larger Heliax.
73, Eric Lemmon WB6FLY
DCFluX wrote:
Has anyone had to remove a piece of RG-213 from service? If so for
what reasons? I think I got a cursed piece between my duplexer and
antenna.
Yahoo! Groups Links
Yahoo! Groups Links
I was thinking 3/8, can you put regular PL-259's on that?
On Tue, 14 Dec 2004 22:04:36 -0500, Q [EMAIL PROTECTED] wrote:
DCFluX wrote:
I was going to replace it with TYPE RG-214/U MIL-C-17. It has 2
copper braids that look 97% or better each.
Buy some 1/2 heliax and get it over
Its only 15 feet.
On Tue, 14 Dec 2004 22:19:55 -0500, Q [EMAIL PROTECTED] wrote:
NO MAN,GO BIG ,1/2 inch minimum,7/8 if ya got it..its all about the
loss !
DCFluX wrote:
I was thinking 3/8, can you put regular PL-259's on that?
On Tue, 14 Dec 2004 22:04:36 -0500, Q [EMAIL
Celeron 333MHz overclocked to 650.
On Tue, 14 Dec 2004 19:39:42 -0800, Neil McKie [EMAIL PROTECTED] wrote:
The controller doesn't need the extra cooling ... but it has it
anyway?
Neil
DCFluX wrote:
Not the radios,The PC with the controller is.
On Tue, 14 Dec 2004 17:19
Anyone have location and pricing info on a nice used TKR-750? Tired
of MONSTER-II.
On Fri, 17 Dec 2004 16:39:19 -0500, russ [EMAIL PROTECTED] wrote:
PS:
They also sell the Kenwood Service Manual's at a fair price. I have bought
one for every repeater a bought from them. As well as some
I am currently running the MASTR-II PLL exciter on 146.640 MHz. I am
running the G2 version and have never been able to find a ferrite core
to replace the aluminum one. It is alot easier to tune than the
multiplier board. Still I can only get the tune test point voltage to
3.6 volts and that is
Instead of deviating the crystal, How about generating a super stable
VCO using a PLL that has say a 5 second lock time instead of the
typical 2mS lock time running all the time, this could even be
frequency locked to a 10MHz source such as those found on GPS
recievers.
Then to modulate it, we
What about building a notch circuit tuned to 600 kHz? And then put
one each on both TX and RX?
On Tue, 21 Dec 2004 20:06:10 -0800, Neil McKie [EMAIL PROTECTED] wrote:
A new VHF paging system just was installed near here in the
last few weeks.
Rich wrote:
155.820
BEND, CITY OF
have any idea how big a 600 khz notch cavity would be?
About 400 ft
We had problems here in the Flint area with two paging transmitters that
were 600 khz apart also 152.240 and 152.840 one or both are off the air now.
tom n8ies
[Original Message]
From: DCFluX [EMAIL PROTECTED
I have 5 Gmail Invites avalible for first come first serve.
Yahoo! Groups Links
* To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
* To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
* Your use of Yahoo! Groups is subject
] wrote:
I'll bite. What is a gmail account?
Ssb
-Original Message-
From: Kevin Natalia [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 22, 2004 3:29 PM
To: Repeater-Builder@yahoogroups.com; DCFluX
Subject: Re: [Repeater-Builder] GMail Account
Would be interest please
I have 4 invites for distribution, Hit me with a direct email if you need one!
On Thu, 23 Dec 2004 20:21:56 -0500, Dave Nixon [EMAIL PROTECTED] wrote:
I could put one through a good test!kb9ilq at arrl.net
Thanks!
From: Rick - VA3RZS/Charlotte - VA3CMR [EMAIL PROTECTED]
To:
I have 4 avalible.
On Sat, 25 Dec 2004 04:35:27 -, kd4htw2001 [EMAIL PROTECTED] wrote:
The 4 invites I had have been delivered in time for a Christmas
present.
Thanks for the great response. 5 folks responded over the 4 I had,
I'll keep them in case I get more soon.
Merry
As a controller designer I can recommend the following:
For a single stand alone repeater: NHRC-2
This controller is an excelent value featuring real voice storage.
For a repeater with a link port: NHRC-4
No voice, CW only. But it will run a remote base or link radio and is
cheap so who cares?
Buy a new radio. What are you using? Sounds like a Motorola HT-220
with a 12 digit keypad added on.
On Mon, 27 Dec 2004 14:36:45 -0500, Richard W. Solomon
[EMAIL PROTECTED] wrote:
Try programming DE W1KSZ/R in a NHRC-2.
73, Dick, W1KSZ
-Original Message-
From: Jim B.
, W1KSZ
-Original Message-
From: DCFluX [mailto:[EMAIL PROTECTED]
Sent: Monday, December 27, 2004 2:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Repeater Controllers
Buy a new radio. What are you using? Sounds like a Motorola HT-220
with a 12 digit
Anyone know where I can get 1/4 hardline? Either Super Flex or Regular?
On Tue, 28 Dec 2004 17:46:19 -0800 (PST), Ralph Mowery [EMAIL PROTECTED]
wrote:
--- Mathew Quaife [EMAIL PROTECTED] wrote:
Thanks Chuck and Kevin. Found them on the net.
Dang, $2.00 a foot, must be
made of
Anyone had experience with mixing the speaker output of 2 radios, Say
Motorola GM300's to one speaker?
I originally tried a couple of resistors but I may have the wrong
values as they got hot as hell and one started smoking, I was using 2
.82 ohm at 2 watt resistors for each radio, one resistor
driving the other radios audio output section.
Oh, you'll also need to load both radio outputs with a resister of 8
or ten ohms.
73
AC0Y
--- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote:
Anyone had experience with mixing the speaker output of 2 radios,
Say
Motorola
, will destroy
the radio, will sould bad, etc., because thats what
happens anytime I share this with someone. :)
Joe
--- DCFluX [EMAIL PROTECTED] wrote:
Thats what I wanted to do, but this has to be a
discrete solution.
The radios have BTL output.
On Thu, 30 Dec 2004 19:03:04 -
-
like decent multiple fuseblocks, good automotive
DC wire, and speaker transformers. It's worth
spending an hour perusing their offerings...
Mike WA6ILQ
--- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote:
Anyone had experience with mixing the speaker output of 2
Check out www.web-tronics.com They have a cheap hot air station that
I have worked with. Also if you are really cheap you can buy one of
the nozzels for the webtronics unit and attach it to a milwakee hot
air blower with a rheostadt. Although you might need to find solder
paste to make decent
I am intrested in the conversion procedure for the squelch, I am not
happy with the audio quality of the midland as well. I was working on
a new squelch board my self but too busy to sit down and build it then
write the software.
On Tue, 18 Jan 2005 16:03:17 -0600, Paul Finch [EMAIL PROTECTED]
Mike, Do you still have the stuff you wrote on this radio and can you
scan it? Can't seem to find The Book
On Tue, 18 Jan 2005 19:33:24 -0600, Chris Peterson [EMAIL PROTECTED] wrote:
Our 220 repeater has been running a 13-509 receiver with an RLC-MOT on it
for several years. We're
You need a COS signal of some sort from the radio. As an engineer I
recommend running the NHRC-2 in conjunction with a NHRC-Squelch. This
will take the RX data signal and give you a carrier detector without
any modifications to the radio. But you will need to make sure that
this RX data is
into the mixer from the cell phone - but I am
not sure because the cell phone turned off after I
connected the phone to the mixer and turned on the
transmitter... perhaps I need and attenuator pad of
3dB or better...
~Ben, KB9LFZ
--- DCFluX [EMAIL PROTECTED] wrote:
I have a Circa 1982 Mini
Yeah, I built the post mixer filter a couple of nights ago from some
brass platting. I think I am going to send away for a Level 17 mixer
with the correct frequency ranges so I can run closer to +0dBm from
the modulator.
On Thu, 10 Feb 2005 16:30:02 -0800, Bob Dengler
[EMAIL PROTECTED] wrote:
request!~
DCFluX wrote:
Sounds like The Beast payed you a visit. For a fun and ammusing
test, hook a handie talkie to the duplexers TX port and key it on low
power on your TX freqency. This should drown your reciever into
oblivion with noise no matter what the power level.
Borrow a spectrum
I am in the market for a nice used Yaseu FTS22 CTCSS decoder board as
seen in such radios as the FT-5100, FT-5200 and FT-8100. Let me know
if you got a spare or basket case radio that the board and cable is
salvageable.
--Matt
Yahoo! Groups Links
* To visit your group on the web, go to:
We need a little more information on the repeater you have, such as
the model number and the rough dimensions of the coils and the cavity.
I have converted a Yaseu FTC-4610 from 474 to 443MHz (With .32uV
sensitivity) by adding 1/2 of a turn to the top of the coils, perhaps
the same can be
lead..
and well matter of fact the same material
and it has aluminum slugs
- Original Message -
From: DCFluX [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, February 24, 2005 9:24 PM
Subject: Re: [Repeater-Builder] Helical Front end UHF
We need a little
When I lost my Mastr-II continuous duty PA going into winter, I
swapped the board for a 110W mobile from an Executive-II with the
TO-220 power regulation transistor, I just gobbed on some heat sink
grease and bent the transistor slightly so I could use one of the
original TO-3s mounting holes.
Try this:
http://www.repeater-builder.com/pdf/GE_Isolation_Curves.pdf
But this is assuming you are running MASTR-II equipment.
Wacom WP-639s, 4 cavity 5 BpBr are the bare minimum assuming you have
the PLL exciter and 100W brick and then there are sometimes where they
are not enough, a 6 cavity
First: not all of the noise the transmitter is creating is on the
intended frequency. A prime example is a certain (nameless) repeater
controller has a 15kHz whine in the audio path due to bad capacitors
in the negitave supply section.
This whine gets into the exciter along with the normal
I stand corrected.
On Thu, 17 Mar 2005 10:26:27 -0800, Bob Dengler
[EMAIL PROTECTED] wrote:
At 3/16/2005 10:04 PM, you wrote:
Helicals are great, small little filters. But they are lossy because
of their small size so you need to follow with a Amplifier, This is
already done in the
I would go with the 120. 12volt fans have a bad habit of dirtying the
DC voltage which can ocasionally be heard in the repeaters audio.
On Fri, 18 Mar 2005 21:23:04 -, kc4wgh [EMAIL PROTECTED] wrote:
Which fan would be better on the GE MastrII, and Motorola Micor
mobile radio
I'll bite.
I am not licensed for this part of the band so alot of my information
is here say.
This is a chalanging band for a repeater as the agreed upon split is
only 100kHz. and it is further complicated by the fact that there are
only 4 official pairs in the FM portion of the band.
All of
We had a RP-70U here and we converted it to Low TX and High RX 444.3
and 449.3 and yes, the stock duplexer did work lousy. But the repeater
was somewhat usable.
I also had a problem with the Ebay special our group aquired, which
was jammed into transmit. I traced it down to a Jammed on PNP
What is Building? How do you define Building?
I have built repeaters from several sources.
1. Using a single mobile radio and converting to full duplex.
2. Using 2 mobile radios without conversion.
3. Using 2 handheld radios without conversion and a mobile PA.
4. Using a single base station
The Son Of Jor-El... still here on this planet? Come to me Son Of Jor-El!
KNEEL BEFORE ZOD!
Yahoo! Groups Links
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[EMAIL PROTECTED]
* Your
Hang around the local electrical company and steal a dual wide
distribution panel enclosure, the type with the 2 or 3 doors and about
6 feet tall and 2 feet deep. There should be enough room to retrofit
some rack rails in there. TV-2 style. (2X4s painted black and
equipment held in place with
I advise you place a 20 or 30 amp diode in line with the master
back-up. You will loose .6 volts, but you should be still in
tolerance. Unless you can find 30A schottky diodes then it would be
.3 volts. Best of all, you won't void any warrenties.
On Tue, 29 Mar 2005 11:36:44 -0800, Daron
://www.repeater-builder.com/rbtip/supplyindex.html#controllers
- Original Message -
From: DCFluX [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 30, 2005 12:09 PM
Subject: Re: [Repeater-Builder] Controler Question
I recomend the NHRC-2. Very durable
Let me know what the number is on the final power module.
The new Mitsubishi RA series have problems with the heat sink die not
being flat. In the center there is about a .8mm indentation for no
reason. The datasheet specify it is nessacary to mill the heat sink to
fit this, but it is not
I think you would be better with a smaller chip, like say a ATMEGA-32
and use an external serial ram chip. And even so the chip has 4K of
ram I believe which should be enough for 450mS or better at a 8kHz
sample rate,
Don't go with PWM, but rather use 8 pins of the controller to make a
I would prefer to do the project with ATMEGA-8 as well. I currently
use Bascom-AVR to program with, but I am more of a hardware designer
and not a software programmer. But space wise for a 2 chip solution I
would go with serial ram and a Tiny13.
Projects I have done with the Atmels:
Repeater
I've am using the LDF1-50 on my 64 machine. I dont know what the deal
is but the reducers I was going to run both for both RG-59 and RG-8X
wouldn't fit this stuff. So I had to just solder the connector
straight to the cable The center conductor of the cable just fits
inside the PL-259's. I
Maybe it is MRF-901? I have a couple of these and have seen them used
in pre-amps and various other pieces of equipment. It is a little
round thing, maybe 3/16 in dia? with the 4 legs in an X pattern, I
believe 2 are emitter.
On Apr 8, 2005 10:04 AM, Ken Arck [EMAIL PROTECTED] wrote:
At
mch wrote:
Sounds like it must have been larger than 1/4.
Joe M.
DCFluX wrote:
I've am using the LDF1-50 on my 64 machine. I dont know what the deal
is but the reducers I was going to run both for both RG-59 and RG-8X
wouldn't fit this stuff. So I had to just solder the connector
I just looked at it, and yeah it is LDF1-50A. The reducers I had were
too small for it, I was debating drilling out the one for RG-8X but
then that would leave none of the reducer.
On Apr 8, 2005 3:01 PM, Roger Grady [EMAIL PROTECTED] wrote:
At 04:21 PM 4/8/05, Mike Perryman wrote:
LDF
If you wan't to play with water cooling a radio I would recommend a few things.
The bigest problem would be the water to radio interface (water
block). If this was me, I would take a MASTR-II mobile, and remove
the heatsink assembly. Then sand blast the paint off it. And
interface a 1/2 copper
Not before checking reactivity to the plastics.
I'd rather stick with plain water, it's a known quantity.
True. I know there is a kid that is running pure CLR in his system.
But he can't over clock much cause it is a cheap off the shelf cooler
with 1/4 tubing.
Pity the RC-210 doesn't have
Doing some research I have found that each interconnecting jumper must
be an electrical 1/4 wave or performance suffers. The jumpers
attribute 6.5dB each to the isolation of the duplexer. I havn't
gotten around to replacing the RG-214 jumpers on my set of 2M cavitys
but it may help my
If they are piston trimmers, grab a ICOM for a GE MASTR-II, as long
as it is not a low band version. This is a cheap and readily avalible
source. But you may have to solder the trimmer in place as I don't
think the outer ring on the capacitor is threaded.
On 4/12/05, Tom Tishken
The phenomenon you are seeing is because the 1/4 wave size at VHF is
3/4 wave at UHF.
I believe the hybrid duplexer design uses 2 or 4 notch only cavities.
If you haven't drilled holes in the side 2 of the band pass cavitiys I
believe they can be converted to notch only by simply removing the
The problem with the stability is that most of these were constructed
using a Galvinised steel rod to set the tuning correct? Try a
replacing it with a more similar metal to copper like brass or copper
threaded rod if you can find it. or a plastic rod that has good
tempreture charecteristics.
I am thinking of going Tuesday/Wendsday.
On 4/16/05, mch [EMAIL PROTECTED] wrote:
I hope I nab it. I sure would hate to miss a week! ;-
Joe M.
JOHN MACKEY wrote:
Who all is going to NAB next week?
Yahoo! Groups Links
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That would be the best, but you have avalibility and cost issues.
On 4/16/05, Per Molund [EMAIL PROTECTED] wrote:
Or maybe Invar alloy for maximum temperature stability?
---per
Yahoo! Groups Links
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I like EMR stuff, but it is a tad expensive. You may be able to find
used stuff made by Microwave Associates that should work ok.
On 4/20/05, Brent [EMAIL PROTECTED] wrote:
Who is a good source for circulators ?
And what make and model are being used in the field ?
---
[This E-mail
Ok, I have some theroies, but I need confirmation from someone that
is like good with math and formulas and stuff as you know I flunked my
high school pre-algebra class.
Anyway I want to make a 2 meter duplexer economy style as the person
who is building the repeater cannot afford a trip to the
--- In Repeater-Builder@yahoogroups.com, DCFluX [EMAIL PROTECTED] wrote:
Ok, I have some theroies, but I need confirmation from someone
that
is like good with math and formulas and stuff as you know I
flunked my
high school pre-algebra class.
Anyway I want to make a 2 meter duplexer
Progress Report on this dead thread:
I got some free time to experiment. I was able to make a attempt
using a ATtiny26. I used the atmel's internal ADC biased to 2.5V with
100K resistors to +5 and GND and audio coupled in with a 0.22uF
capacitor. For the DAC I used a resistor ladder built
Most likely: Audio from the radio which may be biased at 5, 6 or
10volts is not being passed through a non-polarized capacitor to
isolate the AC audio from the DC bias and is possibly charging
capacitors backwards, causing them to fail/short and pulling the
op-amps or audio switches to a DC
I should mention that I have never heard of a RLC-6.
On 4/27/05, Bob Dengler [EMAIL PROTECTED] wrote:
At 4/27/2005 11:01 AM, you wrote:
Mystery: Repeater Problem of the Month Club.
Were all the repeater controllers RLC-6s, or was the replacement something
else?
Bob NO6B
As an engineer I recomend you go with a ready made 222MHz solution
such as those made by Kevin and Scott at Repeater-Builder.com. It is
a good choice if you do not have all the test equipment and skill to
make one of these run where they shouldn't.
This is rare and I don't think it is the case, but since we are taking guesses.
On ocasion I have run accross chassis positive equipment in a rack.
But usually when that happens wires start to smoke from the power
leads of the equipment that is chassis ground.
This was the case of my first
What Model/Make are they?
On 4/27/05, kb9zes [EMAIL PROTECTED] wrote:
I have 3 old TV-translators. Cabinets are 6ft tall. Does anyone know if
I could convert any of these parts into one, to build a 6m repeater? Or
if anyone else has a need for the translators for parts?
Yahoo! Groups
I should mention that I run a 40 amp tripplite power supply non-rack version.
About a year ago it blew the PA and controller on my 64 repeater. For
some reason the crow bar refused to fire and short out the supply
The problem was electrolytic capacitors that were 16V in areas where
25 volts
Hmmm,
11.2 * 2 * 10?
or 11.2 * 20? (*40 for UHF)
What about changing the IF crystals to 10.7? Then you should be ok
until you hit 214 or 428 MHz?
On 4/28/05, Scott Zimmerman [EMAIL PROTECTED] wrote:
In looking at the actual research here at the shop. (I was at home last
night) The actual
I think you have an old UST-100 series UHF translator. I'd say circa
1977-1981, By Television Translator Corporation before they became
Larcan-TTC. Is the cabinet 6 foot tall, and green with center mount
rack stuff? HV power supply in the bottom of the cabinet, IF
compartment in the middle and RF
I am in the market for one as well as I blew up my Astron-35 last
night with a clip lead shorting the output.
Some anus replaced the AC line in fuse with a 15 amp one and the pass
transistors protected it. so now I got a nice supply that throws out
21 volts. Crow bar looks shot too, havent
As long as all the transmitters are ran in synchronisity you should
not encounter very much multipath or speed of light error as the
transmitters are so close to each other. But your performance may
improve with spacing. In the world of FM who ever is 15dB greater wins
due to the capture effect of
I'd have to be really board to do this, but I would brute force the
synthisizers to run on the ham band by using a micro controller
talking straight to the synth chip. I have done this to a Cadco P-375
demodulator and now have the only one that I know of in the world that
receives on cable channel
Anyone have an extra one of these repeaters they are willing to
sacrafice for experimentation purposes?
Seeing as 4K00J3E is an aceptable emission in the ham bands it has
been decided to leave the modulation type the same (ACSSB). This
would allow use of the surplus HT and mobile radios
What is the difference in the formats? Pilot tone?
It looks like the SEA repeater is based on two mobile radios, so the
chip I am working on should be compatible with most of their
equipment, as long as it uses the MC145158 synthesizer.
I saw a repeater on there with a dutch auction, but I
Here is the preliminary schematic. Because the synth chip in the
radio uses +9 V for some reason, this will have to be a board with SMD
parts on it instead of a single chip.
The plan is for Channel 1 to start at 223.85 with 10kHz spacing and
channel 201 starts at 222.15 MHz. There will be
When I use ICM I am usually charged $20 each rock for a 2-3 week cutting time.
But if this is what evryone else charges I don't know where the
Expensive label comes from. I used to use a company that charged $6
each, but there junk drifted about once a month.
On 5/11/05, Bob Dengler [EMAIL
Has anyone had desence due to the fact that the repeaters antenna is
too close to the repeater its self? Like 12 feet of vertical
seperation and 2 feet horizontal?
Yahoo! Groups Links
* To visit your group on the web, go to:
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* To
on.
So far I have tried everything to eliminate the desence, and the
repeater has 0 desence when ran into a dummy load.
On 5/12/05, Kevin Custer [EMAIL PROTECTED] wrote:
DCFluX wrote:
Has anyone had desence due to the fact that the repeaters antenna is
too close to the repeater its self? Like
I am asuming no one came up with a schematic.
All parts can be obtained from www.web-tronics.com
You can replace D1 with what ever voltage you need up to 11V to allow
head room for the NPN transistor to function, And you can replace D1
with a 10K resistor or if you just need +11 or +12 COS
I forgot, you may have to add a 100K resistor accross D1 depending on
the controllers loading.
On 5/12/05, DCFluX [EMAIL PROTECTED] wrote:
I am asuming no one came up with a schematic.
All parts can be obtained from www.web-tronics.com
You can replace D1 with what ever voltage you need up
I pick up the phone and dial ICM and talk to a human, no fax needed, ever.
Everything I have ever ordered from them has worked right on time,
first time, everytime. I havent had to change any compensation caps,
just stick the rock in the ICOM and diddle the center frequency, The
latest set
I have 49 invites for Gmail accounts avalible first come, first serve
by responding to this downlink.
Gmail now offers approx 2200MB of storage, and has beauiful spam
blocking capabilities.
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