That is poor engineering practice. On any site with multiple transmitters
you must use a Circulator and Low pass filter to prevent mixing in the
amplifier stages. What you have happening is that the possible IM products
that fall within the passband of the amplifier stages are being amplified
There is a section in the rules that require the coverage of paint on the
tower and that's where people get into trouble these days with cable ladders
and covering a whole side or two of the tower with Black Coaxes. They no
longer meet the coverage requirements,thus the cables need to be painted.
In addition if you buy the newer line of Crescend that operate on 28 volts
they are much more efficient and run extremely well. Most SMR operators in
Wisconsin are using them on 450 to 470 as well as some 150 to 173 repeaters
and they just love them. Of course they are a little pricey...but you
: Sunday, June 06, 2004 7:08 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: MSR2000 VHF questions
Gregg,
Also remember, the drive to the amp is controlled by the amps power
control.
73
AC0Y
--- In Repeater-Builder@yahoogroups.com, Gregg Lengling
[EMAIL PROTECTED] wrote:
Okay
Oops forgot to say with the base encoder you also have Over the Air
Rekeyingdefinitely a nice toy.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA, WERA and ORC
-Original Message-
From: bredalrv1
I've used them for Military Applications (ANG) and they work well.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA, WERA and ORC
-Original Message-
From: bredalrv1 [mailto:[EMAIL PROTECTED]
Sent: Monday,
Okay not real familiar with the VHF version of this repeater, just need to
know one thing. What is the minimum out of the exciter to drive the 110
watt amp. I'm thinking I'm a little light on drive and thus the amp doesn't
always excite.
Thanks in advance.
Gregg R. Lengling, W9DHI, Retired
You better check the rules...there is an exemption in the rules to allow
rebroadcast of NWS alerts on Amateur radio, but I don't see any to allow it
on MURS.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA, WERA and
What you need is an Iso-T. These are available with usually at 60dB
isolation. You can also make your own by removing the connection on the
base leg of the T so you are no longer directly connected to the feedline
from the service monitor. This should be placed in the antenna system
between the
Actually they are a real pain and take
lots of work and modifications. You are better off trying to find some
900 Meg versionsgo and join [EMAIL PROTECTED] and you'll learn a lot.
No flame intended just info.
Gregg R. Lengling, W9DHI, Retired
Administrator
Sure it's easy to do, you can get Disc. Audio to run the decode right off
the backplane and transmit can be input thru the backplane also to the PL
input of the exciter. You should have both manuals for the station so you
can find all the points. You need the RF manual and the Control manual.
It requires either the KPT10 or KPT50 programmer. The 10 is a standalone
unit (I have one) and the 50 is a riblike device that also can use a laptop.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Member: ARRL, RSGB, RCA and ORC
--
NC Certified Firefighter III / Instructor II / EMT-A
FCC Licensed Technician / Amateur Call NC4AB / Echolink Node 5761
http://www.brinkleyelectronics.com
-Original Message-
From: Gregg Lengling [mailto:[EMAIL PROTECTED]
Sent: Sunday, May 16, 2004 8:42 AM
Looking for a M1131 and a M1132 for the predriver/driver stages of a VHF
MSR2000 110 watt continuous duty amp. Anyone have any laying around???
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and
There were 2 different versions...which one???
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
concealing as much as possible. -States: The Bene Gesserit View
Proper engineering also requires a Low Pass filter when installing an
isolator, this will restrict any incoming frequencies above your operating
frequency...although this is not the reason for the low pass filter...it is
there to protect you from radiating any mixes at higher frequencies.
Gregg
low tuning pots, but there is a third
tuning rod on these duplexers, what would be thier function.
Mathew
- Original Message -
From: Gregg Lengling [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, April 27, 2004 3:14 PM
Subject: RE: [Repeater-Builder] Duplexer Alignment
You should really be using a return loss bridge and a spectrum analyzer and
tracking generatorbut yes I know we can't all afford that equipment.
You can fudge by using a signal generator and a receiver, also never never
never tune the duplexers under transmitter power.
The first thing you
Yes they can be recrystalled and retuned for the Ham bands...but no they
cannot do both...the receiver and transmitter bandwidths are way too tight
(small range).
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing
Kenwood is just trying to market something they mis-designed a number of
years ago and haven't been able to really sell it to the US Hams.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely
I've done the FM PL mods to this type of
transmitter to get direct FM for CTCSS injection. The modulator on that
exciter will not handle CTCSS so the mod is required for a nice clean PL. It's
a rather simple mod with only a few parts and is documented on the RepeaterBuilder
website.
You need to program one of the programmable outputs to TOR (this is a logic
signal that goes active with received signal and proper tone).
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely
Chuck is exactly correct. Before I retired I owned multiple towers and we
used PolyPhaser and copper strapping at all the sites. I can send you pics
of my ham tower (Rohn 55) with the PolyPhaser entrance. It's grounded using
6 copper strap and then 3 strap going to the operating positions.
If you have a County RACES organization, many times you can get local
funding as we have here. Also a large Energy Company (Electric Gas) gave a
large grant to the ARES Statewide Group in Wisconsin last year for improving
communications for emergencies. If I remember correctly the Energy Co.
If you look at the schematic and go to the audio gate on the radio and use
that switching level to switch your transistor buffer you will have a solid
COR and no loading. Been theredone that!
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S#
What exactly are you looking for, I have a bunch of left over 20 watt power
attenuators from Bird. Willing to sell cheap.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
The Pac/RT is a simplex transceiveryou can't make a repeater out of it.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
concealing as much as possible. -States: The Bene
Actually there aren't any specs that say that. What you have to make sure
is that the tolerance specs from the transceivers used meet or exceed the
specifications required under repeater service. Real repeaters usually have
much tighter freq. drift error specs..
Gregg R. Lengling, W9DHI,
There is a schematic on kenwood2-way for the programming cable and by the
waythe cable is the expensive part...the software is half the price of
the cable.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing
What they for...you don't say but sorta hint that they are for a MSR2000.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
concealing as much as possible. -States: The Bene
ICM
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
concealing as much as possible. -States: The Bene Gesserit View
-Original Message-
From: Danny Allen
The reason some manufacturers include fuses on the Negative lead is for
those installers that run both Pos and Neg directly to the battery of a
vehicle. This is not a smart move as normally you create a ground loop in
the negative system of the vehicle and usually end up with Alternator Whine.
It
Does anyone have the service manual for the Kenwood 701A dual band mobile.
I just fixed one by changing the 440 front end fet with the 144 front end
fet (they are both the same)my buddy really just needed his UHF side
working. But I would like to replace the bad fet (now in the 2 meter side)
apologize to anyone out
there who works at Radio Shack, but would they understand?
Chuck
WB2EDV
- Original Message -
From: Gregg Lengling [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, January 03, 2004 3:21 PM
Subject: [Repeater-Builder] Off topic questions
This is nothing new, SIGINT, signals intelligence divisions with the US and
British government and I'm sure others have been doing this for years.
That's why sensitive buildings have full shielding in the walls.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100
We Have two repeaters at one location using two antennas and 2 duplexers,
but because of the high-powered UHF paging TX we got too much desense on the
top antenna for receive so we split to make the top TX only and the lower RX
only. We had 2 micor stations with 2 TX/RX duplexers. By retuning
http://www.tplcom.com/
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while
concealing as much as possible. -States: The Bene Gesserit View
-Original Message-
From:
wait
until the local affiliate was in network programming and you had a REAL
good 3.58 reference. Not so anymore. 3.579545 was an easy number to
remember for some reason... ;^)
73 de N1FNE
-Original Message-
From: Gregg Lengling [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 03, 2003
Another couple ways to calibrate:
I use a GPS receiver with an 10 meg output to calibrate my service monitor.
Before GPS just find out if you have a TV station that is using a Rubidium
Standard for their frequency. Here in Milwaukee Ch4 uses one and we always
used it to check calibration in
Regarding connectors:...my company when I still owned it did a lot of
business with the Federal Government and the Military. We were required to
use crimp connectors, anything else was considered non-compliant. All
outdoor connectors were required to be sealed with DB Vapor Lock or
.
It could be ... that was what? 30 years ago?
Neil
Gregg Lengling wrote:
Are you sure you mean Bendix and not Delco...because delco out of
Oak Creek Wisconsin had one very similar. Of course at that time
they were owned by General Motors...now they are separate and
called Delphi
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