Jim,
Tuning instructions for nearly all Decibel Products equipment are
readily available on their Web site. Here's the link you need:
http://www.decibelproducts.com/pdfs/095097-000.pdf
73, Eric Lemmon WB6FLY
Jim Cicirello wrote:
Can anyone help me with the tuning instructions
personal choices for 2m: Celwave PD220-7 Super StationMaster (omni)
and Sinclair SRL-222 (offset).
My personal choices for 70cm: Celwave PD1150 (omni) and Decibel Products
DB404 (omni or elliptical).
73, Eric Lemmon WB6FLY
Chris wrote:
What would be the best commercial antenna to use
the cost and turnaround time.
73, Eric Lemmon WB6FLY
David wrote:
have a tx/rx 28-70-15 says 450-470 will it tune to the 440 band and whats the
wattage?
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
The Motorola TLE1713A Power Amplifier is rated at 75 watts continuous
duty for 450-470 MHz. It is a component of the MICOR C64RCB station.
All of the technical data is in Service Manual 6881025E50.
73, Eric Lemmon WB6FLY
Joe Peterson wrote:
What is the out put of the Micor TLE1713A
Joe,
The TLB1414C PA is rated at 100W continuous duty, and is designed for
the 42-50 MHz split.
73, Eric Lemmon WB6FLY
ve3abg wrote:
I have a new Micor PA part number TLB 1414C
I would appreciate knowing what the split it is.
I am told so far that its Lowband in the 50 Mhz range
and 100
the repeater antenna.
73, Eric Lemmon WB6FLY
Bruce Morgan wrote:
The other day I was surfing the Internet and I found a controller that
allowed input from a NOAA weather radio and would key the repeater and
rebroadcast the alert when received... now I am having trouble finding it.
Your
for operation and service
information.
73, Eric Lemmon WB6FLY
[EMAIL PROTECTED] wrote:
I have acquired a couple of the Micor Power Supplies with the Battery
Charger. Now I asked the local Motorola shop about purchasing a service
manual. They
are more than happy to help, but need the typical
duplexer, and ask for a copy of the field tuning instructions.
There is no single standard procedure for tuning duplexers, so it
helps to know what method is recommended by the firm that built it.
73, Eric Lemmon WB6FLY
Ian Wells wrote:
...When tuning cavity filters, which is the best way
Charlie,
There is a digit missing from your quoted model number. A T73RTA3903BA
is a 100W MICOR VHF mobile radio with 4 frequency and wide-spaced
operation, with PL tone option. A T74RTA3903BA is basically the same
radio for the UHF band.
73, Eric Lemmon WB6FLY
Charlie Brown wrote:
What
matched to the duplexer. Ironically,
this impedance mismatch may cause the load on the batteries to drop just
a little, while the RF output power drops a lot. Stay tuned...
73, Eric Lemmon WB6FLY
Ralph Mowery wrote:
I doubt that things will change with the ammout of power, but if you are
tuning
equipment is innocent before
filing a complaint. Of course, you had better be certain that Verizon
is, in fact, the offender before pointing a finger at them!
If your repeater is officially coordinated, your case is even stronger.
A 1 MHz split, in New York? Hmmm...
73, Eric Lemmon WB6FLY
Adam C
cavities, and the response curves were
almost identical to the curves shown in the instructions. When the PA
is no more than 20 watts or so, and the receiver has very good front-end
selectivity, the WP-639 works quite well.
73, Eric Lemmon WB6FLY
cwbunting wrote:
I couldn't get these cans
It would have helpful if I had included a URL for the WACOM Tuning
Instructions when I posted my previous response. Mea Culpa! The
instructions apply to WP-604, -609, -612, -621, -629, -639, and -641.
http://www.repeater-builder.com/pdf/wp6xxtuninginstructions.pdf
73, Eric Lemmon WB6FLY
. Combing out the braid may actually reduce the integrity of
the shield connection, and lead to braid wire fractures.
73, Eric Lemmon WB6FLY
Steve S. Bosshard (NU5D) wrote:
Crimp connectors seem to be much quicker and easier to install. I still use
a file comb to dress the braid and a good quality
the options, and I have no reason to change to a different brand or
model.
73, Eric Lemmon WB6FLY
ve3oks wrote:
Hello,
I am looking for a communication monitor, preferably IFR. Can anyone
point me in the right direction.
Ken
ve3oks
Your use of Yahoo! Groups is subject to http://docs.yahoo.com
floor.
73, Eric Lemmon WB6FLY
uplink28 wrote:
I'm thinking about putting a receiver preamp in our system. Any words
of advice from anyone would be greatly appreciated. Brand, model, etc.
If you ahve one for sale let me know too. Thanks.
Your use of Yahoo! Groups is subject to http
of the
cabinet, instead of J2008 on the CNTL-2 module. Follow the instructions
in Section 3 of your manual (EEPROM Programming Software Instructions),
and you should not have any problems.
73, Eric Lemmon WB6FLY
feederclamp wrote:
I bought a Yaesu VXR-5000 repeater which was new in the box
commercial-grade
repeaters, you almost certainly will need ferrite isolators and low-pass
filters on both machines. Choose wisely...
73, Eric Lemmon WB6FLY
Jed Barton wrote:
Hey guys.
OK, this is a bit greek to me, so your info is appreciated. I have 1 site and
2 repeaters. We don't have the space
high winds!
73, Eric Lemmon WB6FLY
Derek B. McIntyre wrote:
Looking for input on heavy duty 2 meter antennas for repeater use at
a remote location with very high winds and extreme ice in the
winter. I am planning to install a VHF repeater on a mountaintop
where these conditions exist within
, Eric Lemmon WB6FLY
Kevin Natalia Mitchell wrote:
Hi All,
I have just built a new set of 6x filters into a duplexer on 2m.
The problem I now have is what length do I make the interconnecting cables
between each filter, and then the output cables to feed 1x antenna.
I have read some
,
especially to the 144-146 MHz segment.
73, Eric Lemmon WB6FLY
[EMAIL PROTECTED] wrote:
Hey guys,
I need some guidance from someone familiar with the MSR-2000 VHF
station. I was just given one of these set up as a wire line
remote/repeater and I thought I got the proper manuals with it.
The 'radio
in International Crystal...
I am simply a satisfied customer.
73, Eric Lemmon WB6FLY
Dan Hancock wrote:
Anyone know if International still offers an Amateur Radio discount?...
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the correct format of reverse burst used throughout the system.
More information about reverse burst formats can be found in
TIA/EIA-603.
73, Eric Lemmon WB6FLY
[EMAIL PROTECTED] wrote:
Hi Guys,
We've discovered something interesting about the TS-64 CTCSS module.
The encoder portion has
just can't say for certain.
One thing is for sure: The less expensive a CTCSS encoder or decoder
is, the less likely it is to generate or respond to the exact phasing
and duration of reverse burst that works seamlessly with the radios in a
system.
73, Eric Lemmon WB6FLY
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in your selection of an appropriate duplexer. The brand
and model of receiver and transmitter are important to know, along with
the 12 dB Sinad sensitivity and PA power rating.
73, Eric Lemmon WB6FLY
kg4ogn wrote:
The Springstead High School Amateur Radio Club {KG4VJS} is in dire need
of a 2
Art,
Most commercial mobile and portable radios, and some newer Amateur
radios, are already equipped to respond to 2-tone sequential paging.
This scheme is far more common than the 5-tone scheme, and it works
fine.
73, Eric Lemmon WB6FLY
[EMAIL PROTECTED] wrote:
Anyone out there using
of heat-sink compound under it to ensure good heat flow. During
heavy usage of the repeater, the muffin fan runs for a few minutes- but
only when needed.
73, Eric Lemmon WB6FLY
drwoolweaver wrote:
I need a simple circuit for a repeater PA fan controller with delay time
out...
Yahoo
duty power amplifier for 42-50
MHz.
73, Eric Lemmon WB6FLY
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Ian,
This post would probably get a better response if it were posted on the
Test Equipment Groups list.
73, Eric Lemmon WB6FLY
Ian Wells wrote:
Would anyone know where I can obtain the rotary switches on the front
panel of a HP8558B plugin?
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to the duplexer, it is almost always easier
and quicker to install an impedance matcher right at the output port of
the PA. When this is done, the cable length becomes irrelevant.
73, Eric Lemmon WB6FLY
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... The second part includes the Amateur 2m band, and
the allowable leakage is very small.
If there is an ARRL Official Observer and/or an ARRL Technical
Coordinator in your area, a formal request for assistance should be
forwarded to either or both of them.
73, Eric Lemmon WB6FLY
(ARRL Technical
interest in Motorola, I am simply a
longtime user of their equipment and a very satisfied customer!
73, Eric Lemmon WB6FLY
Rizky_p wrote:
Hi, i am thinking of building repeater for cheap.
Can a mobile radio with cross band repeating capability and with 50W of Tx
power be used instead
often varies with the drive level, so the adjustment should be performed
only at the operating power level.
73, Eric Lemmon WB6FLY
Adi Linden wrote:
Is the SWR between radio and duplexer supposed to be perfect? Seems like I
cannot achieve low loss through the cans and low SWR
. Its overall length is
19.2 feet. Expect to pay about $580 plus taxes and shipping from TESSCO
or other commercial radio equipment suppliers.
73, Eric Lemmon WB6FLY
eject12 wrote:
Our current repeater antenna, a Hustler G-7, has broken at one of the joints.
We need to replace this antenna. I
repeater.
73, Eric Lemmon WB6FLY
Rizki Pratama wrote:
Interesting. How did you setup the solar powered repeater to be reliable?
Any more suggestion on Repeater other than Motorola?
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the same. If there's a
lot of reflected power, you have a problem to investigate.
The impedance matcher should always be attached as close to the
transmitter PA output connector as possible, for maximum benefit. And,
of course, it must remain in the circuit permanently.
73, Eric Lemmon WB6FLY
Adi
at the transmitter
output, if only to determine whether or not the PA source impedance is
properly matched. If it solves the problem, well...
73, Eric Lemmon WB6FLY
Adi Linden wrote:
There's still something weird happening with my radio, antenna, duplexer
arrangement... Could this be an impedance
are capable of sustained operation in a mismatched
environment. In my opinion, a lot of stations are installed and
operated without a careful assessment of PA matching, and these are
frequently the ones that die unexpectedly, and at the worst possible
times.
73, Eric Lemmon WB6FLY
Laryn Lohman wrote
DC resistance, but nearly
65 ohms impedance at VHF. The Bird and Microlab dummy loads in my
collection are extremely close to 50 ohms impedance. I completely agree
that a name-brand load that measures close to 50 ohms DC resistance will
likely be close to 50 ohms impedance.
73, Eric Lemmon
the detailed service manual does
NOT contain any schematics or parts lists. Although the MTR2000 is
pretty rugged and reliable, it is not a repeater that is
user-serviceable.
73, Eric Lemmon WB6FLY
boterea wrote:
Has anyone setup a Motorola MTR200 UHF Repeater for Ham Radio 70cm band?
Yahoo
for this capacitor can be found at:
http://www.johansonmfg.com/avc/5500.htm
73, Eric Lemmon WB6FLY
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coil is one turn with the same diameter and
spacing.
I do not have a low-band VHF unit to examine, but given the trend, I
would suggest starting with two Johanson #5602 capacitors 1 to 30 pF and
a coil with six turns. A little experimentation wouldn't hurt...
73, Eric Lemmon WB6FLY
Chuck Kelsey
Distributors, Inc.
Murata-Erie North America, Inc.
Electronics Technologies, Inc.
73, Eric Lemmon WB6FLY
Tony King - W4ZT wrote:
Very nice pictures and good job getting component values for the EMR
Z-matcher.
One question comes to mind and that is, how are you going to adjust it?...
Yahoo
://www.wiscointl.com/sinclair/BaseStation/q1220e-2220e.htm
73, Eric Lemmon WB6FLY
bradprimmer wrote:
Has anyone on the list had any experience with a HiPro R1 2 meter repeater
and a Sinclair Q2220E Duplexer...
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back to Telewave for modification and tuning to a
pair in the 2m band.
73, Eric Lemmon WB6FLY
Doug wrote:
I just picked up a set of these VERY cheap, in nice shape, some
scratches, etc. Telewave is sending the tuning directions via FAX. Has
anyone used this in a 2m application?...
Yahoo
for
it. Experiment!
73, Eric Lemmon WB6FLY
Derek B. McIntyre wrote:
I have several TPRD-1554's and 1556's that will certainly work well
in the ham band for 600 KC split. The 1556's (six cavity) will work
down to 400 KC I think. At 600 KC, the 6 cavities have about 2.2 dB
loss. The 4 cavities like
Kevin,
The variable capacitors used on Sinclair Q-201 pass/notch duplexer loops
are Johanson #5602, 1 to 30 pF.
73, Eric Lemmon WB6FLY
Kevin Berlen, K9HX wrote:
I know this may be a topic that has been discussed before, but I need to know
the value of the piston trimmers used to tune
Al,
The Motorola part number HFD8457A is a VHF mobile notch-type duplexer
made by RFS/Celwave. The Celwave part number is 636-6A-5-3. It is for
150-160 MHz, with 4.5 MHz minimum spacing between TX and RX. It is the
standard duplexer used in GR1225, RKR1225, and GR400 repeaters.
73, Eric
frequently use backhaul or
control links in the 72-76 MHz band. If such a link is at your site, it
probably has a ferrite isolator to protect it from other transmitters.
Such a device requires a harmonic filter to block the second harmonic,
which will be in the 144-152 MHz band. Hmmm...
73, Eric
out the TX carrier, you would suffer a great deal of
attenuation on the RX signal- possibly as much as 20 dB.
73, Eric Lemmon WB6FLY
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on your desire to use a commercial-quality radio on
the Amateur bands, but I think you're going to need two radios to
satisfy your wideband objectives. Yeah, I personally like the
DC-to-light capabilities of some wideband Amateur gear, but that
capability brings along a lot of limitations!
73, Eric
!
The Bottom Line: Yes, you can tune a duplexer without any fancy
equipment- but why would you want to, if your objective is to have a
first-class repeater?
73, Eric Lemmon WB6FLY
timtarhanick wrote:
I have a TXRX duplexer I am going to use on two meters. Everything I read,
including the manual
Maybe, maybe not. I found only one citation for TAD6072A, and it is
described as a unity gain ground plane antenna. While such an antenna
will work just fine if the desired coverage area is modest, a ground
plane antenna might not be the best choice.
73, Eric Lemmon WB6FLY
timtarhanick wrote
the
built-in meter to read signal strength.
73, Eric Lemmon WB6FLY
Don wrote:
... How much current dos the Micor Unified chassis draw for the 9.6?...
Other question: I use the 0-50 Micro Amp Meter on top of the 6 Ft Rack
as the S-Meter for incoming signals, and it reads half scale with no
signal... I
. NFPA
780, the Lightning Protection Code, is a must read.
The R56 manual is an excellent guide- it's now in a single volume, by
the way- but when its guidance conflicts with either NFPA 780 or NFPA
70, the National Electrical Code, the latter codes must prevail.
73, Eric Lemmon WB6FLY
Yahoo
service on 2m, and the close-in valley coverage is far superior
to that obtained with a vertical fiberglass antenna.
73, Eric Lemmon WB6FLY
Hellewell, Byron (Mission Systems) wrote:
Hi
I am doing some planning for an VHF repeater on the top of a
9000 foot high mountain top.
The coverage
with screw terminals, I'd pay for the
deluxe version.
73, Eric Lemmon WB6FLY
kb6jst wrote:
Hi,
I am looking into purchasing an outboard CW IDer for my IRLP node
and have been thinking about the Control Signals CWID-50B. Is
anyone out there using this board? And how do you program
to the desired coverage area, it might be wise to use an offset
dipole antenna instead of a vertical omnidirectional fiberglass
antenna. Whichever antenna design you choose, consider using a top
support to keep it from waving in the wind.
73, Eric Lemmon WB6FLY
Donnie Q wrote:
I am putting a 220 machine
because a new owner or manager
couldn't find any record of the sharing agreement.
73, Eric Lemmon WB6FLY
Rob N1NTE wrote:
I am going to loan one of my repeaters to a local ham club. Does anyone
have an agreement/contract written up for something like this? I've got
some basics in mind but looking
percent that calls for a network analyzer- and when you're running a lot
of solid-state power with a very sensitive receiver, sometimes you need
every bit of performance you can get!
73, Eric Lemmon WB6FLY
Jim Cicirello wrote:
Is there a formula to calculate the cable length between duplexer cans
. The others have N female connectors.
All of these antennas have a gain of 8.0 dBd with zero downtilt. The
first three models can handle 250 watts, while the 458K-2 can handle
1000 watts. Overall lengths range from 12.8 to 14.4 feet.
73, Eric Lemmon WB6FLY
n1nte wrote:
Can anyone help me
voltage should be raised a bit to compensate for the diode voltage drop,
and it should be set so that the float voltage is within the range
specified by the battery manufacturer.
73, Eric Lemmon WB6FLY
Don wrote:
Just Picked up a Astron RM-60 with Battery Backup Option to use on my UHF
Micor
The data sheet for HI-AMP circuit protectors can be found at:
http://www.bussmann.com/library/bifs/2065.PDF
73, Eric Lemmon WB6FLY
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use a
VHF exciter followed by a tripler. He had jury-rigged the exciter to
run all the time, to minimize the key-up interval. Once he buttoned
everything back up, the leakage was undetectable. We live and we
learn...
73, Eric Lemmon WB6FLY
Loren James wrote:
I have a GE Mastr II mobile radio
Alan,
You can buy the service manual for a VXR-5000 repeater directly from the
Yaesu/Vertex Parts Department for less than half the cost of copying a
manual, since it is large and there are many fold-out schematics in
color. Visit www.vertexstandard.com for more information.
73, Eric Lemmon
or BNC.
73, Eric Lemmon WB6FLY
David Schornak wrote:
Does anyone know where to get an SO-239 with a shield, or just a shield for
an SO-239?... What is the best type of coax to use inside of a MICOR for
installing a receive antenna?
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direct strikes in as many
years, when most of the other radios at the same site were seriously
damaged or destroyed. Choose wisely
73, Eric Lemmon WB6FLY
Daron J. Wilson wrote:
Installing VHF and UHF antennas on some towers in locations where the
whip may extend above the highest point
fails. The most recent edition of Part 97 is
dated October 1, 2003. Keep a copy on hand.
73, Eric Lemmon WB6FLY
Alan wrote:
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
://www.satellitearc.com/2003%20Part%2097%20Rules.pdf
73, Eric Lemmon WB6FLY
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Mike,
On what band do you want this duplexer to operate?
73, Eric Lemmon WB6FLY
Mike wrote:
I am looking for a mobile duplexer so I can make a portable repeater... Also,
cheap as possible for 50-75 watts rating.
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in the Amateur 70cm band. $200 is a good price for such a
machine in perfect condition. The manuals for that repeater are
6881025E50 and 6881025E60.
73, Eric Lemmon WB6FLY
Ray Brown wrote:
Howdy, everyone. I have an option to buy a working, used repeater from a
friend of mine... The model is C64RCB
at [EMAIL PROTECTED]
73, Eric Lemmon WB6FLY
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is one second wide, which gives us no opportunity for a recycle.
We can slip 24 hours once, then it is down for a couple of days.
73, Eric Lemmon WB6FLY
tony dinkel wrote:
Somewhere around I remember having a brand new one but I am going to have to
dig. I always considered them a bit of a toy
Jim,
What is the ink-stamped part number of the SCM board?
73, Eric Lemmon WB6FLY
Jim Cicirello wrote:
Hello to Kevin and the Group:
Modifications to the MICOR Base to repeater operation is going well
thanks to your help.
I am now going to modify the Station Control Module as described
missing something?
73, Eric Lemmon WB6FLY
Dudley wrote:
... have for trade a 450 MHz, 250 watt Micor repeater, complete, single
user, on 458.9, tone 114.8, in great shape, Like to trade for an IFR
service monitor. No Junk!!...
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, Eric Lemmon WB6FLY
dy3lmk143_13mhz wrote:
If I have two receivers A and B. Receiver A has a sensitivity of
0.25uV for a 12dB SINAD and Receiver B has a 0.35uV, which has a
better sensitivity? is it Receiver A?
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installed.
73, Eric Lemmon WB6FLY
w9mwq wrote:
Does anyone know whic band this micor unit is in? This is the only
information that was given to me. Thanks.
Mathew
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oscillator. That does nothing
for the deviation, power, distortion, SINAD, and signal level
functions. All instruments drift over time, some more than others...
73, Eric Lemmon WB6FLY
Neil McKie wrote:
... Then I got the bad news: if I were to send an IFR 1200S to the
factory for warranty
-rate repair
includes one major repair and an NIST calibration for $1,525.00. Please
note that if more than one repair is needed, the price will be based on
a time and material charge.
73, Eric Lemmon WB6FLY
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fluctuation of the frequency error meter of about 27 Hz. Both
of these problems were fixed, along with a bad regulator/filter board in
the power supply that was found while troubleshooting. Judging from the
other postings, I got off easy!
73, Eric Lemmon WB6FLY
John Sichert wrote:
Eric
the plating. A Gold Guard pen
is another tool worth using.
73, Eric Lemmon WB6FLY
Ken Arck wrote:
Hi kids
I'm tuning up a T1504A, which has the 430 - 470 cable set on it. Everything
looks good, except for one cavity - one of the lowpass/hi reject ones. I
can't seem to get a very good null
few parts. Since you have covered the obvious, there's
not much left besides internal damage or an incorrect or faulty loop.
73, Eric Lemmon WB6FLY
Ken Arck wrote:
Hmmm, here's a kicker
At 3 megs above the pass frequency, I can adjust for a sharp, deep null
about centered in the slot
and the other brands, so don't even THINK
of mixing brands!
If your group is a non-profit organization under IRC 501(c)(3), then you
should consider applying for a grant to purchase all new equipment that
is set up as a system, and not try to pick up the elements piecemeal.
73, Eric Lemmon WB6FLY
Robert W
Ken,
Congratulations! I will file this tidbit of information away for future
use...
73, Eric Lemmon WB6FLY
Ken Arck wrote:
...I noticed the connection to the S0239 had apparently been resoldered
at some point in the past on the adjusted one... On the bad one, there
was so much solder
Richard,
That's exactly what I would do: Lower the antenna, out of the intense
RF field.
73, Eric Lemmon WB6FLY
Richard Sharp, KQ4KX wrote:
Our club was allowed space (no cost) on top of a 400' tower using an
existing 7/8 line... At the top of this tower is also six other
transmit antennas
Brian,
Unless you have had three defective circulators in a row, the most
likely problem is that none of them were tuned to operate on your
carrier frequency. Go to this site for more information:
http://www.repeater-builder.com/rbtip/micoruhffilters.html
73, Eric Lemmon WB6FLY
Brian wrote
and 12W PAs, so if you bypass the attenuator you must
also alter the sensing circuits to avoid some downstream grief. Since
you have the manual, this should not be a problem for you.
73, Eric Lemmon WB6FLY
Brian wrote:
I figured it out. The repeaters I have were 2watt versions and I had to
bypass
/bandreject (BpBr) duplexers have almost
no bandpass selectivity, so this must be provided by separate
bandpass-only cavities.
73, Eric Lemmon WB6FLY
Someone wrote:
...What bothers me here about using a circulator is that you say it only
occurs when your TX is active. This doesn't sound like IM to me
version. Unfortunately, neither the part number nor the
characteristics of the thermistor are broken out in the parts list,
since the antenna network was designed to be replaced as a unit.
73, Eric Lemmon WB6FLY
[EMAIL PROTECTED] wrote:
I also have one of those 2-Watt MICOR Repeaters, it's
/electronics_mfg/esm/node_GS17WPCZRYgs/root_GST1T4S9TCgv/vroot_DPB1Q1MJ7Nge/bgel_CB3Q9WMK52bl/gvel_WK8GCR2GN3gl/theme_us_electronicsesm_3_0/command_AbcPageHandler/output_html
Most electrical supply houses will stock Scotchkote Electrical Coating
compound.
73, Eric Lemmon WB6FLY
P. S. I have been made
companies get most of my business. DISCLAIMER: I have no financial
connection to either of these companies; I am merely a satisfied
customer of both.
73, Eric Lemmon WB6FLY
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Tedd,
Thanks for the vote of confidence, and congratulations on your success
in car shopping!
73, Eric Lemmon WB6FLY
Tedd Doda wrote:
On Sun, 09 May 2004 19:25:42 -0700, Eric Lemmon wrote:
I put together a
specific list of equipment I require, and I ask several dealers to
submit a quote
Chris,
You have given credence to what has been a little-known dirty secret.
Thank you for adding a vote for consumer awareness in the marketplace.
Caveat Emptor!
73, Eric Lemmon WB6FLY
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want, because the appropriate power control functions are
integral.
In the specific instance of converting a 2W amp into a 12W amp by
removing the power attenuator, you need to add the resistor and the
thermistor in order to properly protect and control the PA.
73, Eric Lemmon WB6FLY
Brian
be changed until the VSWR is
matched between the cavities.
This matching of cavity VSWR is made much easier with a return loss
bridge or a network analyzer, since you can achieve a match in a few
seconds. Although a good RLB costs a few hundred bucks, it is worth its
weight in gold!
73, Eric Lemmon
-400 issue, visit:
www.repeater-builder.com/rbtip/double-shielded-coax.html
73, Eric Lemmon WB6FLY
DIGITEL S.A. wrote:
We are new at building repeaters. I had built UHF repeaters using RG142
cable to interconnect duplexer to repeater. Now I am building a VHF
repeater, and I need to make
Mark,
The Spectra-TAC Comparator manual 6881039E50 is still available from
Motorola for just $9.46 a copy.
73, Eric Lemmon WB6FLY
n9wys wrote:
Looking for a manual for the SpectraTAC Signal Quality Comparator... I have
one of these, and I need a manual to determine pinouts, etc
assembly, even when you really want just the technical data for
a component.
Finally, I have found that it usually costs much more to copy a thick
Motorola manual, especially when it has foldout schematics and PC board
pictorials in color, than to buy a new manual from Motorola.
73, Eric Lemmon
than 1 dB of desense. As you might imagine,
very few 2m repeaters make the grade with only a four-cavity duplexer.
More often than not, the owners of such repeaters are unaware of this
performance impairment!
73, Eric Lemmon WB6FLY
Michael Singewald N1PLH wrote:
A while back, the conversation
tuning, that was all it took.
73, Eric Lemmon WB6FLY
two_way_tech wrote:
Has anyone in the world EVER got a Johnson PPL6000 UHF on ham bands?
Jordan
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