On Mon, 19 Apr 2004 23:18:54 -, dy3lmk143_13mhz wrote:
Transmitter and amplifier manufacturers usually specifies a duty
cycle (i.e. 50W 100% duty cycle) on their product. then how do you
prove what they specified is correct?
Install a real big dummy load on the output, key
the radio, and
At 11:18 PM 4/19/2004 -, you wrote:
Transmitter and amplifier manufacturers usually specifies a duty
cycle (i.e. 50W 100% duty cycle) on their product. then how do you
prove what they specified is correct?
---Doesn't it suck they don't give you the complete picture? Duty cycle is
generally
Place the device in the mfgrs specified operation
and monitor the active parameters over a lenght of
time.
Heat, current draw power output are good indicators.
Amplifiers are all about heat reduction/removal.
cheers
skipp
www.radiowrench.com
dy3lmk143_13mhz [EMAIL PROTECTED] wrote:
- Original Message -
From: dy3lmk143_13mhz [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, April 19, 2004 7:18 PM
Subject: [Repeater-Builder] Duty Cycle
Transmitter and amplifier manufacturers usually specifies a duty
cycle (i.e. 50W 100% duty cycle) on their
Only one part of the equation. If receiver B has
better front end protection/preformance, it's
going to be a better choice.
Many of the newer commercial and older low dollar
repeater receivers crap-out on busy mountain tops
and repeater sites, especially when you park a
gasfet mixer (preamp)
At 11:41 PM 4/19/2004 -, you wrote:
Many of the newer commercial and older low dollar
repeater receivers crap-out on busy mountain tops
and repeater sites, especially when you park a
gasfet mixer (preamp) in front.
---Now you know why I insist on using only Chip's stuff :-)
Ken
Just curious WHY you want to prove it?
Because I'll be doing lots of justifications for the purchase of
these brand. I'm choosing betwen two brands and the difference is
duty cycle. I don't wanna be blame in the future for choosing these
brand over the other.
I'm assuming you are talking
On Mon, 19 Apr 2004 23:52:02 -, dy3lmk143_13mhz wrote:
Because I'll be doing lots of justifications for the purchase of
these brand. I'm choosing betwen two brands and the difference is
duty cycle. I don't wanna be blame in the future for choosing these
brand over the other.
Ok...fill us
Sorry I forgot to mention its for commercial use.
I'm deciding between Icom FR-3000 and Kenwood TKR-720. Both Repeaters
has built-in power supply.
here's a simple comparison
SensitivityTX output power
FR-3000 0.25uV 50W 100% Duty cycle
TKR-720 0.35uV 15W 100% Duty
Does anyone have any use for the tone elements like the old Motorola
Pageboy
used before I toss about 100 or so of them ?
They are part number TLN 67098. They are from about 300 to 500 hz in
frequency.
I think the suffix behind the TLN is 4 digits... 6709or 6708
You are correct. The
I'm assuming you are talking about a Ham radio
installation? The BUSIEST repeater around here
*might* get 10% use during an average day, and that
estimation is probably high (2.4 hours a day?).
So the repeater doesn't have to be 100% duty cycle?
It all depends on how long the
At 4/19/2004 04:48 PM, you wrote:
At 07:35 PM 4/19/2004 -0400, you wrote:
.35 uv sensitivity is kinda iffy in my book.
0.35uV is the rated sensitivity of most Mastr II
repeaters (UHF anyway) WITHOUT a preamp. 0.20 with
the preamp (info from the manual).
---Granted. And it STILL sucks :-)
On Tue, 20 Apr 2004 00:50:06 -, dy3lmk143_13mhz wrote:
base on the specs, I think FR-3000 is better. I think supplier has to
guarantee what was said on the specs are correct.
Based on the specs, I would agree.
Have you done a case study on what is needed for
your particular situation
I'll rephrase the question, what is the min frequency separtation for
a 10W repeater with two ants, no vertical separation, horizontal sep
of about 100'.
I'm guessing it would have to be 2 MHz or more, but that is what I'm
asking.
Please don't answer .600 and 200' vertical because that is not
I must make a comment here...people that think that repeaters should
be there and not used is asking for the band to be removed by the
FCC, that will fix all of your peoblemsThen you can keep all of
the repeaters for EMERGENCIESExcept for one thing there will be
no one there to help
Yes, there is:
3 X 146.925 - 2 X 147.225 = 146.325 (the input frequency of one of the
repeaters)
3 X 147.225 - 2 X 146.925 = 147.828 (The input frequency of the other
repeater)
Because the PL tone of both repeaters rides on the intermod products, it
will keep both repeaters keyed up.
These 2
It is receiver A
Thank you
Joe
I find television very educating. Every time somebody turns on the set, I go
into the other room and read a book.
-- Groucho Marx, 1890-1977
-Original Message-
From: dy3lmk143_13mhz [mailto:[EMAIL PROTECTED]
Sent: Monday, April 19, 2004 8:05 AM
To:
I am in need of a Service manual, copy would be ok for the Motorola
DPL Test Set SLN 6413A. Willing to pay a fair price for your time. I
need to fix my test set as i am working on my repeater tone panel.
Any help will do. thanks Ron WA6UNM
Yahoo! Groups Links
* To visit your group on
They smoke a few out of every hundred built and rate them accordingly.
dy3lmk143_13mhz wrote:
Transmitter and amplifier manufacturers usually specifies a duty
cycle (i.e. 50W 100% duty cycle) on their product. then how do you
prove what they specified is correct?
--
73...Clark Beckman
We moved a bunch of 100-watt 460/465 MHz MSR-2000 repeaters down to the ham
band. By just following the alignment procedure in the service manual, they
tuned right up with excellent performance in the ham band - the receivers
had better than spec sensitivity, the transmitters put out 100+ watts.
Our repeater is an MSR2000 UHF model, Model # C74GBS3106BT. It was
originally at 460 MHz, and we tuned it down to 444.550 / 449.550.
Our problem is - we are only getting about .6 µv to .7 µv
sensitivity in the receiver, and this is when feeding signal
DIRECTLY into the receiver (no
The answer lies along the diagonal lines;
http://www.repeater-builder.com/pix/vertsep.jpg and
http://www.repeater-builder.com/pix/horizsep.jpg - using the horizontal
method you will need so much bandwidth you will be into the next radio
band, like 222 and 440 or 146 and 222. This is just one of
Hello All:
Questions: Does some problem exist if I share oneself RX antenna for two repeaters with a "Tee?" I thank any information in this respect. Regards
UcaimaDo You Yahoo!?
Todo lo que quieres saber de Estados Unidos, América Latina y el resto del Mundo.
Visíta Yahoo! Noticias.
I think you are expecting a miracle here and I doubt anyone on this list is
going to be able to give you an exact answer.
My suggestion is that you take two synthesized rigs and try different
frequency separations. If you can accomplish the task with ham rigs, then
you should be able to
Title: RE: [Repeater-Builder] Min FREQ Separtation, VHF rep, No Duplexers
100' separation between antennas and all users between the antennas Why not just use tin cans and string LOL ;)
Seriously, ever think about using a simplex repeater ??? One radio, one antenna, no duplexer,
Chip makes repeater receivers?
Ken Arck [EMAIL PROTECTED] wrote:
At 11:41 PM 4/19/2004 -, you wrote:
Many of the newer commercial and older low dollar
repeater receivers crap-out on busy mountain tops
and repeater sites, especially when you park a
gasfet mixer (preamp) in front.
Sure, I can help... Look up the receiver coil preset
charts in the service manual and reset every coil to
the factory preset. Then align the receiver using the
manual steps in the proper order.
Most people will only retouch the front end helicals.
You need to do the entire realignment from
Skip - can you advise the part numbers for the manual sections for the UHF
receiver? My manual has the transmitter stuff, but the receiver stuff is
all for the VHF unit. I'm going to try to get them from Motorola... If I'm
not successful, do you - or anyone else here - have the UHF receiver
Hello,
I still have some of these UHF Mastr Exec II radios for sale, my problem is
shipping. These things are heavy! I have no shipping material, if you guys
want one of these radios I am going to have them professionally packed for
shipment. I think I can get a pretty good deal through a
Hi Mark,
There are three basic manuals for the MSR Series of
repeater/base stations. First is the control and
operation manual, which has the back-plane board
and control module information.
The VHF Manual has a green strip on the cover and
contains the Transmitter/Receiver information.
With the advent of IRLP, Echolink, VOIP and other
linking schemes... some repeaters broadcast crap
all day long. Does a good job of chasing the regular
locals, who like to monitor a quiet repeater off the
machine.
PA duty cycle in excess of 80%, content worth
listening to 2%. Ego of the
Chip who? Receivers for which bands?
- Original Message -
From: skipp025 [EMAIL PROTECTED]
Date: Tuesday, April 20, 2004 11:43 am
Subject: [Repeater-Builder] Re: Receiver Sensitivity
Chip makes repeater receivers?
Ken Arck [EMAIL PROTECTED] wrote:
At 11:41 PM 4/19/2004 -, you
Chip Angle of Angle Linear Preamp fame. His preamps
are well made and well known throughout the Amateur
and Commerical Radio World.
His latest generation of P-hempt type devices are
very low noise. The better news is the third order
intercept is much better than a generic gasfet, very
good
Hi everyone. I'm looking for input and information on the following
project I am exploring.
I may have to oppertunity to multicouple a UHF 440 repeater with our
countys highway dept UHF repeater antenna.
I have found some information on the Rx multicoupler but still
looking for information
Robert W Burton wrote:
Thanks Mike for your reply,
The cool thing about the MCC converted stuff is that the controller is on
the inside of the GE. The only openings are holes that are drilled above
the pa section for a fan. There is a harness but it is for the remote
base which plugs into
Richard Velez wrote:
Can this unit be programmed to the ham band without modifications. I
would like to use one as a Transmitter on 2 meters only???
I didn't see another response to this. Yes, they *usually* go down to
the ham band with no transmit mods, and just a little tweak on the front
Your going to have to give us more information RE: all the TX and RX
frequencies involved, how much power is everyone running, is the highway
dept. willing to accept some degradation in their TX power (there is no free
lunch on combining). How you couple two transmitters will be driven by
freq.
I have several ctcss enc/dec boards like the CTN34 and the TN21S all have
the same color coding
the CTN 34 I want to PUT back in use on the RP70U repeater but the connector
on the repeater is cut
most all radios I have seen from standard have the same color code
White
gray
violet
blue
yellow
--- courir26 [EMAIL PROTECTED] wrote:
I'll rephrase the question, what is the min
frequency separtation for
a 10W repeater with two ants, no vertical
separation, horizontal sep
of about 100'.
I'm guessing it would have to be 2 MHz or more, but
that is what I'm
asking.
Please don't
--- Steve Bosshard [EMAIL PROTECTED] wrote:
Once upon a time I asked Lloyd Alcorn up at Wacom
that question.
Best I recall 60 ft is the maximum distance on a
tower that you can
seperate antennas.
Further seperation will not yield additional
isolation because of the
coupling within
Tom
I think if you took two Mitrek units and set one up as a receiver and
the other as a transmitter, using two antennas and two feed lines with
600Khz separation and kept the transmitter power at 20 watts or less this
would work like you want. In my past memory I once saw this done. I think
At 4/20/2004 04:31 AM, you wrote:
As long as you don't experience mixing troubles it will work,
Using a coax T to connect 2 RXs to 1 ant. is not a good idea,
particularly if the RXs used have good front-end filtering (helical
resonators). The reason for this is that unless the frequencies of
42 matches
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