Hi Folks,
I'm getting pretty close to putting up the machine, and I am looking for a
'real' PA for it.
High split low band Micor PA so I can move it to 6 meters. Continuous
duty.
Already have the rest of the Micor components (RX, cards, exciter, etc).
Please respond off-line.
thanks!
tim
Hi folks,
I was given a couple of LB mobile antennas, and I have moved them up to 6
meters. (I drilled a hole in the plastic case, and shorted out 2 turns
(soldered across them). It seemed to tune right up to 52 mhz.
However, I noticed that the position on the back deck of my car really made
Anybody know anything about the 'controller' that
is in this repeater?
The schematic is in the 'manual', but no real info.
The Fan runs all the time, although it has a controlling
input from the micro on the controller.
Just wondering if it has any kind of intelligence built
into it.
Thanks,
Hi Folks,
I got a couple of the large AGM batteries for
a solar installation, and was wondering if
there is any condition that will lead them
to vent inside the enclosure? They are sealed,
but probably have one-way valves.
Can I put the solar controller in the same
enclosure?
Figured some of
...@yahoogroups.com] On Behalf Of tahrens301
Sent: Saturday, July 24, 2010 10:27 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Repeater receiver testing
I have this lowband Micor receiver
that I want to test for adjacent channel
rejection.
I have two calibrated
I have this lowband Micor receiver
that I want to test for adjacent channel
rejection.
I have two calibrated signal generators
and a calibrated spectrum analyzer if
I need it.
How can i measure the rejection of the
off channel signal?
Thanks,
Tim
I have this lowband Micor receiver that I would like
to check the adjacent channel rejection.
I have two calibrated signal generators, and a calibrated
spectrum analyzer (if needed).
Can I do the measurements with this equipment?
If so, how? Resistor divider network between the
two sig gens?
Hi folks,
Still working on the hardline duplexer for 6 meters, and have some data I'd
like to run by you guys.
Running 80 watts out of a Micor tx into the TX bank of cavities. With
test equipment, get about 100dB notch. (shows 50 watts into dummy load as
well).. have about 1.5 - 2dB loss
Hi Folks,
Well, I got the hardline duplexers completed for
6 meters, and after a shakey start, they now work
at power. Looks like about 100dB notch 1.5dB
loss through each set of 3 'cans'.
Using RG-142 as the inter-can connections, and
RG-214 between the TX/RX duplexer.
All the 'business'
Hi Folks,
Well, they are complete, but there seems to be
a problem with the transmit side 'cavities'.
The variable capacitor from the center of the SO-239
to the center conductor gets extremely hot.
I'm running about 70 watts out of the PA, and the
devices that I used are identical to what was
Hi Folks,
Anybody have a Micor Low Band PA - Repeater/Base
station type? Not sure if they came in lower
power versions, but looking for a continuous
duty.
Will swap a VHF continuous duty for it.
Looks like I'm getting some cans for the 6 mtr
repeater will now be able to be at a single site,
Hi Folks,
I'm starting to work on the 6 meter portion of the repeater
system here, and have a question about the link receiver's
antenna.
The existing 2 meter repeater is a Quantar feeding the
duplexers. On the 'Antenna' port of the duplexer I've put
an in-line diplexer, with the 'UHF' port
Hi Folks,
I thought I remembered the timing, but I've slept since
then.
In A-B signaling, the A tone was 1 second, the B
tone was 3 seconds, but what was the A/B interval?
(most around here use a 2 second B tone).
What is the dead time between the tones? (if any)
Thanks,
Tim
Hi Folks,
I picked up 3 DB-225 elements yesterday, but
can't find any information on them on RB.
They are currently tuned for 47.1, and I'd like
to take them to 53.15.
Anybody have any info on them, or how I could
phase 2 of them on the side of the tower?
Thanks,
Tim
Hi folks,
Well, looks like the R2002B will be setting on the
shelf for a while. (dead PS)
In the mean time, I was able to get an IFR 1100S
for a good price ;-).
Anyhow, looks like it all works except for the o'scope.
Was wondering if there is something 'simple' I should
look for (fuse, etc),
Well, it looks like the old R2002B took
a drizzlin'.
The mongo 6.2v Zener in the 5v overvoltage protect
circuit is a dead short, leading me to
believe there are more problems lurking
in the power supply.
Anybody have an 'extra' power supply, or know who
works on these things?
Thanks,
Tim
Hi all,
Working on a micor mobile to be used as a
repeater (only using the exciter/control board/PA).
Was going through it, and am only able to get
about 75 watts out of it with the exciter on 53.7.
The exciter is putting out 0.3 watts... a bit more
than most exciters I've seen, but they were
Hi Folks,
Came across a low band handheld... price was right! :-)
Looks like it is programmable.. even has a EEPROM in 8pin
minidip in a socket!
Anybody know if it'll go 'up' to 6 meters?
thanks,
Tim W5FN
Hey Skipp,
I've just removed the AC supply from a SpectraTac receiver
shelf. Has a Micor RX a couple of cards. System draws
less than 200ma.
I used an LM317 (a couple of caps R's)... soldered the tab
directly to a piece of PCB material. Runs all day long with
12 input doesn't even get
Hi Folks,
I'm working on a low band Micor, and only have
some K1005A channel elements. (they are the 'vhf'
elements... the 1003 are the 'low band').
I've looked at the schematic to the 1005 here on RB
versus what I see in the 1005, and with the exception
of a resistor, and possibly the
Thanks for the info guys, I had planned on keeping it about
5 feet away from the tower for the TX antenna.. the RX antenna
will be at the top of the mast, so it won't be an issue. (split
site)
Guess I'll do a bit of experimenting with the mounting.
Tim
Hi Folks,
I looked at the cutting 'chart' here on r-b, but it didn't
make much sense.
The antennas that I have are at 47.2MHz, and resonate exactly
at that frequency.
I removed the loop, and the measurements are from Tip of curve
to the end of each piece is 54 and 58.
The cutting chart says
Hi folks,
Anybody have a schematic for a Micor low band
mobile? I need schematics for the Exciter, PA,
and the control board that sits between the TX
RX.
Thanks!
Tim W5FN
Hi Folks,
I am needing the size and weight of a Micor
mobile (for shipping purposes). (no accessories)
Thanks,
Tim W5FN
Not sure if the manuals are still
available from Mot...
anybody have some .PDFs?
thanks,
Tim
Hi Folks,
I'm looking for a Low Band Micor Repeater exciter
and Final that I can put on 6 meters. (I
already have all the other stuff)
I have a High Band version of same stuff to
trade.
Figured I'd ask here first.
Thanks,
Tim W5FN
I spoke with the technical folks at Optima today, and
got some interesting information.
1. For this application, they recommend the Yellow top
battery.
2. This battery can be completely 'drained' (down to 0 volts),
and be recharged. 300 times - they guarantee for 2 years
3. To
Are the optima type batteries meant for extended deep
discharges?
Tim
--- In Repeater-Builder@yahoogroups.com, KD8BIW sdenn...@... wrote:
Something such as an Optima Yellow top battery would be okay in this use.
They are sealed, spillproof AGM batteries. Keep them at their float
optimas are for deep cycle apps. Check their website.
Va2ir
Sent on the TELUS Mobility network with BlackBerry
_
From: tahrens301 tahr...@...
Date: Sat, 30 Jan 2010 14:11:05 -
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Battery system
Now that the actual repeater is complete,
I am looking for some suggestions about
how to power it.
The repeater and +12v power source will be
stored in our rescue truck.
The idea behind this is to be able to set
it up on top of a hill so that we can
have communications with personnel on the
Well, I thought this thing was tuned up,
but obviously something is wrong.
These are a set of the 2x2x4 cavities...
have a plunger in the front, and a variable
cap adjustment on the back. Also, a pair of
BNC connectors on the capacitor side.
The plate says Duplexer Vari-Notch,
147-174
It also
completely shot.
On Thu, Jan 28, 2010 at 4:37 PM, tahrens301 tahr...@... wrote:
Well, I thought this thing was tuned up,
but obviously something is wrong.
These are a set of the 2x2x4 cavities...
have a plunger in the front, and a variable
cap adjustment on the back. Also, a pair
. Model numbers are different for units designed for either the
transmitter higher or lower than the receiver frequency.
I have tuning instructions if this sounds like the unit.
Rob K7TGU
- Original Message -
From: tahrens301 tahr...@...
To: Repeater-Builder@yahoogroups.com
repeaters,
Comprised of five of the two inch square cavities.
Tx-Rx manual says 2.5 mhz spacing.
Tag says Tx 1.5 dB insertion for 76 dB isolation, and Rx is 1.1 dB for
110dB(Tx is 76dB at Rx and Rx is 110 at Tx)
Three cavities on Rx, two on Tx.
On 1/28/2010 8:28 PM, tahrens301 wrote
repeaters,
Comprised of five of the two inch square cavities.
Tx-Rx manual says 2.5 mhz spacing.
Tag says Tx 1.5 dB insertion for 76 dB isolation, and Rx is 1.1 dB for
110dB(Tx is 76dB at Rx and Rx is 110 at Tx)
Three cavities on Rx, two on Tx.
On 1/28/2010 8:28 PM, tahrens301 wrote
it? Did
it test okay on the original pair?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sent: Thursday, January 28, 2010 6:21 PM
To: Repeater-Builder@yahoogroups.com
Subject
Anybody have any experience with the duplexers in this
repeater? (I have the repeater, and was wondering if
it worth trying to find one, or go elsewhere).
Will be running the repeater at 20w, with a 4.55mhz
split.
I've seen the '$99' specials on e-bay.. would they be
a decent alternative to
Hi Folks,
I was just wondering if one of you who has the software to
do so could look up how much horizontal separation it would
take on 6 meters. I have two sites 8 miles apart, and vertically
separated by about 30 meters.
just wonderin'
Thanks,
Tim W5FN
Hi Folks,
I've been looking into making a solar repeater (from the
Micor repeaters that I already have on hand).
Obviously the 100W or 60W amplifiers are out of the question,
not only in power, but really in size.
I noticed that there is some silkscreen on the transmitter
interconnect board (in
Hi Folks,
I asked this question on Batlabs, but haven't gotten any
response, so I figured I'd ask here.
I have an XTL2500 Mobile unit, and the control head is
angled so the viewing angle is really bad - the entire
display looks somewhat dark - certainly darker than
looking straight on.
Anybody
Hi Folks,
I've acquired a MSTR II mobile that has already been placed in
repeater service, with a large control box, etc attached via
the main connector on the front of the radio.
I'm planning on removing all of the external stuff (speaker, etc)
to make it as self contained as possible. Found a
Hi Folks,
I know it's been done a lot, but I have no experience in
having two repeaters simulcasting.
Here's the info:
There is an existing repeater that has some coverage issues
in a neighboring area. The folks in that area, while still
wanting to be on the same output frequency, will put a
Hi Folks,
I've been working on these Spectras, and so far,
the capacitors have done the trick.
But on this last radio, the speaker pops whenever
the audio path is open (unsquelched, signal, mode
change, etc).
Just curious if there's something I've missed.
Thanks,
Tim
Hi Folks,
I'm looking for some power connectors for the above types
of radios.
I don't need much more than pigtails, as I am doing a special
cabling project.
I've looked at both Mouser Digikey, but they don't seem to
carry anything similar. I have seen 'generic' types before...
somewhere!
Hi Folks,
I was perusing the 'for sale' list on QRZ.com the other day, and came across a
suitcase repeater which had a spectra control head visible.
I was wondering how they did it.
Can a spectra be turned into a repeater?
Did they use two separate Spectras a single head?
Inquiring minds
Hi Folks,
I need the following:
1 Vibrasender (TX) KLN6210A/TLN6824A 141.3 Hz
1 Vibrasponder (RX) TLN8381A 186.2 Hz
I have bunches of the Sender reeds:
100.0, 123.0, 151.4, 206.5.
Thanks,
Tim
Hi Joe,
I'm looking for one as well, if your junk box is that deep!
(VHF MSR2000)
Thanks,
Tim W5FN
--- In Repeater-Builder@yahoogroups.com, burkleoj joeburk...@... wrote:
Wayne,
I have had much better luck with Angle Linear preamps than the Mitrek/MSR2000
units.
Chip does offer a
by lightning our only repeater
will get zapped.
If I do make it, then the weather will be fine, it will have
been a 'waste'.
Just like insurance! :-)
Thanks,
Tim
--- In Repeater-Builder@yahoogroups.com, wd8chl wd8...@... wrote:
tahrens301 wrote:
Hi Folks,
I picked up a bunch of Micor
can figure out how
to get the audio through the box, we'll be home free! (it
has the secure cards on the left of the rack, some strange
wires on the back).
Tim
--- In Repeater-Builder@yahoogroups.com, Kevin Custer kug...@... wrote:
tahrens301 wrote:
Hi Folks,
I picked up a bunch of Micor
Hi Folks,
Before I dig into the manuals (so thoughtfully provided by RB)!!
for the DVP repeater, I thought I'd ask if anyone had already
done the conversion had some stuff written up.
Otherwise, guess I'll be the first!
Thanks,
Tim
Hi All,
That X9000 'consolette' didn't work with all the secure boxes
stuff attached, but I removed the radio, control head added a
standard cable, reprogrammed it, and it works.
Anyway, the power supply that was inside is marked HPN 1000A.
Anybody have a schematic or spec sheet on it? It
Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sent: Thursday, October 15, 2009 9:55 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] HPN1000A Power Supply Schematic/Specs?
Hi All,
That X9000
Hi Folks,
I picked up a bunch of Micor repeaters today,
and as I figured, they have the TLD xxx4
receiver in them. (160-174mhz).
I know that to put on 2 meters, new resonators
some other stuff is required, but is it
necessary if I go down to 154?
I'm working on this as a backup repeater for
Hi All,
I recently acquired an MSR2000 2 receiver remote base
that I am going to convert to a basic kerchunk-able backup
repeater.
I know I'll need a squelch gate module, but unsure about
the PL cards - the repeater must have separate TX RX
PLs.
I've reviewed the docs on RB got some good
can set it to
10 minutes and pretty much forget about it until something
bad happens and you pat yourself on the back for using it.
cheers,
s.
tahrens301 tahrens@ wrote:
Hi All,
I recently acquired an MSR2000 2 receiver remote base
that I am going to convert to a basic
Hi Paul,
I have a TKR-720 (VHF), and was successful in reprogramming
it for the ham frequencies.
However, it is not for the 'faint of heart'.
1. There are two EEPROM devices which must be reprogrammed.
One for the frequencies, and one for PL.
2. The EEPROM device for the frequencies is
, the one you have is either a 32 or can go 64 channels
with moving a jumper.
I have the suitcase programmer for those if you need it.
73,
Mike KB5FLX
- Original Message -
From: tahrens301
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, September 16, 2009
Hi Mike,
BUSTED!
Man, I gotta eat crow on this one... I've had X9000s
on the brain for a couple of months now, by golly,
if that sticker was a snake, it would'a bit me.
First clue.. I had never seen a control board like
the one that is in this radio... that shoulda' been
an indication that
Hi Folks,
I put this out on Batlabs, but haven't heard anything, so I
thought I'd try here.
I got a couple of VHF X9000s that have the hand held controller,
with Securenet stuff inside.
I've programmed many 'normal' X9000s before, but can't seem
to get this guy to talk. (the computer isn't
have to have special software to talk to the radio and the grey box.
Mike
- Original Message -
From: tahrens301
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, September 15, 2009 1:22 PM
Subject: [Repeater-Builder] Programming of X9000 with Handheld controller
Does anyone have any experience in using this
software?
I've gotten the main program running, but getting
the proper elevation data seems to be a bit iffy.
The 'automatic download from the internet' function
doesn't appear to work.
thanks,
Tim W5FN
Thanks Phil - looks like that will help.
Tim
--- In Repeater-Builder@yahoogroups.com, Phil Hebert n3...@... wrote:
http://groups.yahoo.com/group/Radio_Mobile_Deluxe/
is the group dedicated to the programming
WAY over my head. Hope this helps
somewhat.
Tom DGN
--- In Repeater-Builder@yahoogroups.com, tahrens301 tahrens@ wrote:
Does anyone have any experience in using this
software?
I've gotten the main program running, but getting
the proper elevation data seems to be a bit
to move the antenna frequency.
73 - Jim W5ZIT
--- On Tue, 9/1/09, tahrens301 tahr...@... wrote:
From: tahrens301 tahr...@...
Subject: [Repeater-Builder] Antenna SWR = Desense?
To: Repeater-Builder@yahoogroups.com
Date: Tuesday, September 1, 2009, 2:03 PM
Hi All,
And the winner is. Door # 2.
Put the 2 meter vertical up on the stick at the end of
the hard line, the desense was worse!
Perfect match at the feed line end.
Took dummy load put on far end of hard line no desense.
Guess it is the proximity to the antenna. Although about 100',
have a chart handy where I am now. Sid.
--- In Repeater-Builder@yahoogroups.com, tahrens301 tahrens@ wrote:
Hi Jim All,
Thanks for the info responses.
I took down the 224 found that the N connector on the
end wasn't quite up to snuff. I am going to put a
ham antenna
it, the end
result of the situation is simular to bad LMR-400.
Scott, N6NXI
- Original Message -
From: tahrens301
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, September 02, 2009 9:56 AM
Subject: [Repeater-Builder] Re: Antenna SWR = Desense?
Hi All
- Original Message -
From: tahrens301
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, September 02, 2009 9:56 AM
Subject: [Repeater-Builder] Re: Antenna SWR = Desense?
Hi All,
And the winner is. Door # 2.
Put the 2 meter vertical up on the stick at the end
Hi Doug,
I put the connectors on the hardline myself, was very
careful in doing so. Also did an RF check with a dummy
load on the end, and no loss/problems.
I am going to concentrate on the actual connectors from
the Quantar.
thanks,
Tim
--- In Repeater-Builder@yahoogroups.com, n3dab
The antenna is on the top of a small wooden storage building.
A mast is placed up against the peak of the roof, and the 224
is on top of that.
The metal building that the repeater is in is my garage. Very
plain, no air condx, AC power runs around the pearlings about
4' off the ground.
Gonna
Hi Eric,
Hmmm, don't think I said above the station, but if I implied
it, no, it's horizontal. I can look out the window see it!
Nate - I only tried the 'ham quality' antenna because I knew
it would be a better match than the DB224. It was easy
to change, standing on a 6' ladder! Just
Hi folks,
Just a bit of an update... got the 6 cavity Telewave
duplexer tweaked up - looks like it pretty much hit
the specs in the data sheet.
With a dummy load at the 'antenna' port, I used an
iso-tee to inject a signal at both the receiver
input, and between the antenna port the dummy
load.
-224 100' horizontally 10' vertically separated. I
don't understand what you mean by that.
Joe
tahrens301 wrote:
However, putting the system on the antenna (a 150-160 mhz
DB-224 100' horizontally 10' vertically separated)
through a metal building fed with 7/8 heliax, there
seems
.
Milt
N3LTQ
- Original Message -
From: tahrens301 tahr...@...
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, September 01, 2009 4:02 PM
Subject: [Repeater-Builder] Re: Antenna SWR = Desense?
Hi Joe,
The repeater/duplexer is in my workshop (a large metal building
A friend of mine who is the foreman for a large
ranch asked me about providing radio coverage.
As there are a couple of hills (2000' AGL) around the
ranch, coverage in some places would be spotty, so a
repeater on one of the hills would be the best solution.
However, there is no power available,
@yahoogroups.com, Mac McCullough w...@... wrote:
go with Lo band, way good coverage, lo band maratracs are in abundant
supply, 50.00 or less, no repeater to mess with .. lo band would work well.
ymmv mac/mc w5mc
- Original Message -
From: tahrens301
To: Repeater-Builder
,
Tim
--- In Repeater-Builder@yahoogroups.com, tahrens301 tahr...@... wrote:
Hi Mac,
Thanks for the reply.
I thought about low band, but they want to use a number
of handhelds, I've never been much impressed about
the antenna selections on low band handhelds.
That has been a couple
@yahoogroups.com, Mark n9...@... wrote:
Tim,
Is this a business band thing they are looking at, or can a GMRS repeater be
a solution?
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sent: Wednesday
Hi Folks,
I was checking e-bay for duplexers last night, and came across a
DB-4050 that the user said was a pass/reject duplexer.
It looks almost identical to one that has been giving me some desense
issues, but had a marking of SP-1894.
The cabling looks a bit different, but functionally
Hey Joe,
Is that you from Mot?
Tim Ahrens W5FN
(excuse off topic)
--- In Repeater-Builder@yahoogroups.com, Joe Ciarcia k...@... wrote:
Anyone have a HP 8924C that is being used as a service monitor
for land mobile/ repeater applications? Will it send an analog CTCSS
tone along with a 1 KHZ
that was a cabling issue
and not the duplexer.
God luck on the adventure..
BR
-Richard
From: tahrens301 tahr...@...
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 25, 2009 12:43:30 PM
Subject: [Repeater-Builder] DB-4050WB Duplexer
Hi Folks
If you aren't looking for a lot of them, coilcraft has
always been pretty good about doing samples. All done
on their web site.
Tim W5FN
--- In Repeater-Builder@yahoogroups.com, cruizzer77 atlant...@... wrote:
Does anyone know a source for shielded molded coils in 10mm size?
Mouser
the extension to 2 inches. This moves the center frequency of the completed
DB-224 mod down to 146 mHz from 155 mHz.
73 - Jim W5ZIT
--- On Wed, 8/19/09, tahrens301 tahr...@... wrote:
From: tahrens301 tahr...@...
Subject: [Repeater-Builder] DB-224 Matching
To: Repeater-Builder
Hi Jim,
I have used a directional coupler to get a received signal into
the system, but have too many adapters on it to make it work
right!
The repeater is a Motorola Quantar, so there shouldn't be any
problem in the split size.
I can have one antenna on the tower, but not two, so I gotta
One of the guys here had written some C code that
runs on a PC that you could use.. think you plug
the RX audio into the sound card. If you want,
I can dig up the e-mail. I think I saved it.
A hardware solution would be to get one of the Motorola
desktop MDC units. They have a LED display on
...@... wrote:
If you could dig up that email, that would be great. You can either repost on
here or email that directly to me. Thanks
--- In Repeater-Builder@yahoogroups.com, tahrens301 tahrens@ wrote:
One of the guys here had written some C code that
runs on a PC that you could use.. think
Hi Jim, thanks for the words on corrosion, and Laryn... aah, the
voice of experience! No holes will be drilled!!
Thanks to all. I believe that will be the easiest way to make
it work.
Tim W5FN
--- In Repeater-Builder@yahoogroups.com, larynl2 lar...@... wrote:
Perhaps
drilling a hole
In my quest to get rid of desense with
the Quantar, someone mentioned that having
the 'wrong' antenna could make the desense
worse.
I've got a DB-224 - not the 'ham' version,
but the 150-160 MHz version, and there is
a bit of a mismatch.
Has anyone ever had any desense that they
could attribute
Hi Norm,
It's 147.10/70, so at least it's up high in the band.
I thought about adding some metal to the loops, but
figured I'd ask around here to see if it's been done
before.
Thanks,
Tim
--- In Repeater-Builder@yahoogroups.com, NORM KNAPP nkn...@... wrote:
What frequency pair in 2m do you
Hi Joe,
Guess we are all telling our age.
I had WR1AIK in 1975/76. Remember it took a note to my
congressman to get the license assigned - seemed to take
forever!
I was in the AF in Northern Maine at the time.
cu
Tim W5FN
--- In Repeater-Builder@yahoogroups.com, Joe k1ike_m...@... wrote:
-
Hi DCflux,
Tried the bandpass + notches didn't change much.
On changing to the BpBr, any idea how much capacitance
is needed? I have a fistfull of those Johanson caps.
Also, a buddy of mine has a Sinclair Q202G that I'm
thinking about also. Will pick it up tomorrow see if
it is any
Was just curious as to if folks have
gotten Notch cavities to work ok with a 600khz
split. Have 4 in Rx leg 4 in TX leg. According
to the analyzer, each bank has a 90dB notch.
Double shielded cable throughout (RG-9).
Just about pulled all my hair out over the last
couple of weeks, and still
Hi Dcflu7x,
It's a DB products SP-1894. Can't get any info on it from
anywhere.
Each of the 8 cans have the approx dimensions of 5 x 21.
A single screw-type shaft in the center, and one SO-239
sticking out of the top of the can. No variable caps, or
anything else on the cans. Each can has an
Hi Ralph,
No, they were 10 as came from the factory for 166 mhz,
so it didn't look like they were cut for anything
in particular.
DCflux - I started to do what you suggested... sounded
like something else to try. Took the link out of the
last can the loop wasn't soldered to the PL259
Hi Bob,
I was pretty curious about it as well, especially in
the 'early days' of this project. Nobody seemed to
know much about the stubs.
If you are looking at the spec. analyzer trk gen,
you see the notch. The left side goes down deep,
then comes up on the right side of the notch. But,
Hi Folks,
Guess it's a good thing the antenna party didn't happen yet.
Put the DB-224 up on a pole here attached to a portable building.
Ran the 7/8 heliax from the antenna into my garage - about 100'.
With a signal source from my monitor, the repeater would chop in
and out. Ugh-desense.
I
Hi Dcflux,
Yeah, I did that 1st. Actually, they now come out of the
front of the box are as far apart as I can get them.
Tim
--- In Repeater-Builder@yahoogroups.com, DCFluX dcf...@... wrote:
Cut the wire tied together TX and RX cables on the back of the quantar
and seperate them as far as
I checked it into a dummy load (with one of those celwave
signal insertion boxes), and didn't see any signs of desense.
A friend of mine who used to work for Mot said that he had a
desense problem with a VHF Quantar - Mot sent out some kind
of memo that said you had to use some special kind of
Hmmm,
Well, I did the signal injection into the receiver's port, as
opposed to at the dummy load, and indeed, I do have desense
when using the dummy load.
I guess that points back to the cans how well they are performing
(or not)!
Hi Folks,
I was talking to a buddy of mine that used to work for
Motorola, and he remembers having a problem with desense on
a VHF Astro system.
He had even received an email from a Mot product engineer stating
that off the shelf duplexers would cause the problems they were
having.
Figured
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