skipp025 wrote:
Jim B. [EMAIL PROTECTED] wrote:
Just for everyone on the list, the idea of higher
channels on a trunked system being less used only
applies to LTR systems, where everyone is assigned
a 'home channel', and you only go to another channel
if that's in use.
Never say
about 55% of each transmitter's
output gets burned up in a dummy load, each time two signals are
combined. Thus, eight 100 watt repeaters combined into one antenna
will
have about 11 watts at the antenna.
While it is true that aprox. 50% of the power from each transmitter is
lost in the
Tom Saunders wrote:
about 55% of each transmitter's
output gets burned up in a dummy load, each time two signals are
combined. Thus, eight 100 watt repeaters combined into one antenna will
have about 11 watts at the antenna.
While it is true that aprox. 50% of the power from each
Gentlemen:
I guess I will add my 2 cents worth here. In a two Tx Ferrite Hybrid
combiner each Tx will have at least one ferrite isolator and some times
three between the TX and the combiner. For a two Tx combiner there will be
approximately 3.5 db loss for each Tx. When increasing to a four Tx
The GLB worked very well on my FM-76 (aka 13-509) but it only gave about
8dB gain overall to the receiver. Most of the gain was lost in the helical
coil front end, but it worked wonders on marginal receivers. It tighten up
the receiver and gave the impression of more added gain than 8dB. I
I move them a little at a time, don't try to make big changes or you will
not be able to get a signal through it. If you want to, you can take the
cover off and inject a signal into each stage. Work from the output towards
the antenna connection. When you are able to get a signal from input
--- In Repeater-Builder@yahoogroups.com, Doug Bade [EMAIL PROTECTED] wrote:
It should also be clarified that this is the major difference
between a hybrid ferrite combiner and a cavity combiner. The hybrid
can be
used with any freq's in the specified band, no matter how close
spaced
Sorry about the previous blank post.
In a best of the world situation, you can hope for about
2.8 dB loss through a Cavity system.
Through a hybrid combiner system you can hope for
about a 3.5 dB (best) loss.
Hybrids only if you must... otherwise you end up with
a room full of space
FHS [EMAIL PROTECTED] wrote:
Gentlemen:
I guess I will add my 2 cents worth here. In a two Tx
Ferrite Hybrid combiner each Tx will have at least one
ferrite isolator and some times three between the TX
and the combiner.
Min typical spec should include 2, although 1 is common.
For a
At 8/5/2005 08:34 AM, you wrote:
Sorry about the previous blank post.
In a best of the world situation, you can hope for about
2.8 dB loss through a Cavity system.
I get 2.0 dB loss from my 2 TX UHF combiner: 2 isolators 1 pass can on
each TX. I optimized the cavity-to-T cable lengths for
Follow up from the original thread !!
I have a Micor Motorola mobile repeater operating on 147.165 MHz
and I have foreign broadcast transmitting on a frequency of 11.700
MHz which is getting into the IF section of my receiver which also
operates on the same frequency 11.700 MHz so my
ANTHONY wrote:
Follow up from the original thread !!
I have a Micor Motorola mobile repeater operating on 147.165 MHz
and I have foreign broadcast transmitting on a frequency of 11.700
MHz which is getting into the IF section of my receiver which also
operates on the same frequency
Jim B. wrote:
Use the same ground as the lighting arrestors,
*lightning*
=cp
--
Jim Barbour
WD8CHL
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At 06:28 PM 8/5/2005 -, you wrote:
I have a Micor Motorola mobile repeater operating on 147.165 MHz
and I have foreign broadcast transmitting on a frequency of 11.700
MHz which is getting into the IF section of my receiver which also
operates on the same frequency 11.700 MHz so my
Ken Arck wrote:
At 06:28 PM 8/5/2005 -, you wrote:
I have a Micor Motorola mobile repeater operating on 147.165 MHz
and I have foreign broadcast transmitting on a frequency of 11.700
MHz which is getting into the IF section of my receiver which also
operates on the same frequency
At 03:20 PM 8/5/2005 -0400, you wrote:
Not very well, but yeah, there's usually enough FM (maybe phase shift as
it bounces off the atmosphere?) in the station to hear something, but
it's not very intelligible.
---Well, I don't buy it. I have never heard of a case where a foreign
shortwave
At 8/5/2005 12:33 PM, you wrote:
At 03:20 PM 8/5/2005 -0400, you wrote:
Not very well, but yeah, there's usually enough FM (maybe phase shift as
it bounces off the atmosphere?) in the station to hear something, but
it's not very intelligible.
---Well, I don't buy it. I have never heard of a
At 12:40 PM 8/5/2005 -0700, you wrote:
VOA.
---VOA isn't broadcast overseas but in NC I believe? Field strength has
got to be a definate factor!
Ken
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Ken Arck wrote:
At 03:20 PM 8/5/2005 -0400, you wrote:
Not very well, but yeah, there's usually enough FM (maybe phase shift as
it bounces off the atmosphere?) in the station to hear something, but
it's not very intelligible.
---Well, I don't buy it. I have never heard of a case
At 03:54 PM 8/5/2005 -0400, you wrote:
Yeah, it actually happend to us, with a Micor rx mounted in a
non-unified chassis separated from the rest of the base. Other then the
pop-on shield on top, no other shielding except the rack cabinet, and
when the ground got pulled off, we started hearing
The nearest DIODE is all you need to demod some AM, seen it many times
in various things. Just not a micor yet.
Ken Arck wrote:
At 03:54 PM 8/5/2005 -0400, you wrote:
Yeah, it actually happend to us, with a Micor rx mounted in a
non-unified chassis separated from the rest of
I'm looking at the pruchase of a repeater that is in the 100 watt
range already converted in the ham bands. I want to interface it with
my current controller, CAT 1000B. Looking for best prices, but also
has to be able to be picked up, or shipped within reason. Let me know
what you have. I
100 watts on what band? DOH!
Mathew Quaife wrote:
I'm looking at the pruchase of a repeater that is in the 100 watt
range already converted in the ham bands. I want to interface it with
my current controller, CAT 1000B. Looking for best prices, but also
has to be able to be picked up, or
oops, missed that one.VHF.sorry
Mathew
Q [EMAIL PROTECTED] wrote:
100 watts on what band? DOH!Mathew Quaife wrote:I'm looking at the pruchase of a repeater that is in the 100 watt range already converted in the ham bands. I want to interface it with my current controller, CAT
2 Meters.Been a very long day.Too many hours and not enough sleep.
Mathew
Q [EMAIL PROTECTED] wrote:
100 watts on what band? DOH!Mathew Quaife wrote:I'm looking at the pruchase of a repeater that is in the 100 watt range already converted in the ham bands. I want to interface it with
Just want to take a moment and say thanks to all those how have helped
me along the way with my repeater system. Due to reasons I will not
discuss, I've decided to leave the group. I will continue to stive
for a great repeater, but if I don't, I will continue to work my 90
hours a week, and
Anthony,
You may have to put your receiver in a shielded box and bypass all the
lines going in and out. I had to do this with a UHF station receiver that
picked up cell phone transmitters several miles away, even with no antenna
on the receiver. Drove me nuts for a while.
Al, K9SI
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