Well, there seems to be a bit of a mystery. The schematic in the
base/repeater station manual I have shows:
C531
43L
30M
24H
But the parts list shows:
C531
43L
36M
24H
So is it 30 or 36 pF? Who you gonna believe?
I checked a mobile Micor manual, and it's listed as 30 pF in the parts list;
Richard,
What version TLD1693 amplifier do you have? There are significant
differences between the TLD1693C, TLD1693D, and TLD1693E PAs. The
capacitors in question have slightly different values, and the four final
transistors are different. Since the four finals in your PA are M9625, I
think
Jared,
What is the model number of the voter?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of KE4ZDG
Sent: Friday, March 05, 2010 6:37 PM
To: Repeater-Builder@yahoogroups.com
Subject:
I don't have any spares, but just finished putting an L43GGB on 2 meters.
Ordered crystals from Bomar. They were a lot less than International or Jan
and worked fine. It's fun to go back and dig into these old Motorola radios.
Enjoy!
Mike, WA9FDO
Motorola had a really tremendous museum at their campus in Schaumburg, until
a couple of years ago. I understand they closed it down. Had a chance to go
through it several times. I think they had just about every radio and TV
they ever produced. Sorry to see it go.
Mike, WA9FDO
Yeah they turned it into an innovation center-showing off future
technologies-I really enjoyed it-saw it first when working for them in
the late 1970's, and many times since, last time I was on campus they
held a cocktail party in it and had about 20 different new technologies
being shown and
--- In Repeater-Builder@yahoogroups.com, yeahright26 yeahrigh...@... wrote:
--- In Repeater-Builder@yahoogroups.com, skipp025 skipp025@ wrote:
Joe saved me all the typing... thank you Joe. I have a
pdf copy of the Spectrum S-7R Manual.
IF YOUR EMAIL ACCOUNT WILL ALLOW LARGE FILE
If you do decide to pitch it, please toss the channel elements my way. I have
a 1/4 KW station that can use them.
Jeff W6JK
While cleaning out a garage this week, I saw my old
CHP MOTRAN that I crystalled up on 52.525 many years ago...
LMR and similar cables are not rated for low PIM
What exactly do you mean by PIM ?
rffun
--- In Repeater-Builder@yahoogroups.com, Larry Horlick llhorl...@... wrote:
Indeed. I'll read the archives. Thanks.
73
On Sun, Feb 28, 2010 at 8:59 PM, Chuck Kelsey wb2...@... wrote:
The
LMR and similar cables are not rated for low PIM
Kindly let me Know what exactly PIM means
73s
rffun
- Original Message -
From: Larry Horlick
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 01, 2010 4:02 AM
Subject: Re: [Repeater-Builder] LMR Cable
Indeed.
Passive Intermodulation. Things like rusty hardware or disimilar metals can
cause it in the presence of RF.
From: rffun radio...@her.forthnet.gr
To: Repeater-Builder@yahoogroups.com
Sent: Sun, March 7, 2010 2:33:33 PM
Subject: [Repeater-Builder] Re: LMR Cable
Passive Intermod. In other words, it tends to be a source in which intermod
can be generated easily.
Chuck
WB2EDV
- Original Message -
From: rffun radio...@her.forthnet.gr
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, March 07, 2010 3:33 PM
Subject: [Repeater-Builder] Re: LMR
Although this particular part of the spectrum isn't operationally relevant
for us, the way the FCC is treating spectrum it promised to protect is a
real eye opener. If it happens to them, it can happen to us.
K7IJ
_Will the FCC Interfere With Sirius XM Yet Again?_
You bet. There's also a move to eliminate, or severely reduce, the new
over-the-air digital TV stations as well as the dish TV providers. Nothing is
off-limits these days. They aren't going to be happy until they've screwed
everything up.
Chuck
WB2EDV
- Original Message -
From:
Good morning!
I have an Alinco DR-135T and a DR-435T radio. I would like to be able to
utilize these two radios for a crossband repeater. I have read that all of the
functions of the crossband are out of the DB-9 Connectors on the back of the
radios. I have used both of these radios for
I figured out out. The local/remote switch on the back of the power supply was
on local. That disabled the 25V necessary to run the lights. Also, turns out
that all the fail lights' bulbs had blown. All is working now.
BTW, it's the old school gray voter w/ 6 cards.
Jared
--- In
Hello,
I am wanting to make a crossband repeater out of a DR-135T and a DR-435T Alinco
radio. How does someone do this? Can I just hook up a straight DB-9 to DB-9
serial cable from one to the other and it will work? Or do I need to build a
cable with different wiring? Thanks
73, Brad KD5AR
well-documented and caused mainly by the use of foil shielding as in the lmr
series. gets worse as cable ages and internal braid-foil contact degrades.
Although not as big of a problem with lmr due to an insulating layer over the
actual foil. beware of belden 9913 and lmr look-alikes.
Hey folks,
Any idea what would make an MSF5000 CLB EPROM controller randomly reset (test
lights coming on)? When it's not in self-check mode, it works fine, but
roughly every 3 mins, it resets itself.
Thanks,
Jared
Any problems with RG-214 or RG223 for duplexers/multi-couplers/combiners?
lh
On Sun, Mar 7, 2010 at 5:50 PM, Dan Saputo dan17...@yahoo.com wrote:
well-documented and caused mainly by the use of foil shielding as in the
lmr series. gets worse as cable ages and internal braid-foil contact
Those are usually the preferred types of cables. You should have no problems
with either of those. I prefer REAL RG214/U., but RG400/U, RG393 or RG223/U
will work. Avoid RG-142 and RG-9/U. Superflex is also a good choice. Don't even
think about any LMR type or
similar.
N5NPO Norm
-
What is the difference between real and un-real RG214? And what is the
problem with RG-142?
lh
On Sun, Mar 7, 2010 at 6:24 PM, NORM KNAPP nkn...@twowayradio.net wrote:
Those are usually the preferred types of cables. You should have no
problems with either of those. I prefer REAL RG214/U.,
none i'm aware of. mil-spec rg-214 or 223 has silver-plated conductors. the
best interconnect cable to use in my opinion would be a smaller diameter heliax
such as FSJ1-50A if you can get away with it.
Dan
k8plw
--- On Sun, 3/7/10, Larry Horlick llhorl...@gmail.com wrote:
From: Larry
Konstantinos Hatzakis wrote:
/
LMR and similar cables are not rated for low PIM
Kindly let me Know what exactly PIM means
73s
rffun
/
Go to:
http://en.wikipedia.org/wiki/Intermodulation
Scroll down to Passive intermod.
73, Joe, K1ike
Yahoo!
Real as it refers to the original military-spec'd construction of the cable.
Type meaning similar to original spec but likely not exact. common
differences in Type cable might be tinned vs. silver plated conductors,
dialectric material etc.
Spec RG-142 has a silver-plated steel center
So in a duplex application, if the supply of the better cable is limited,
it's better to use it on the rx side?
On Sun, Mar 7, 2010 at 6:42 PM, Dan Saputo dan17...@yahoo.com wrote:
Real as it refers to the original military-spec'd construction of the
cable. Type meaning similar to original
in a duplex environment high levels of rf are likely to be present in close
proximity to all associated station hardware including interconnect cables so
best not to take chances on cable/connector quality. holds true of both tx and
rx cabling.
Dan
k8plw
--- On Sun, 3/7/10, Larry Horlick
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the Repeater-Builder
group.
File: /Coaxial Cable Specifications/MIL-C-17_84B RG-223 Cable.pdf
Uploaded by : wb6fly wb6...@verizon.net
Description : MIL-C-17_RG-223
Nope. Both braids are silver-plated, so there's no dissimilar metals, and
no foil to rub against. RG-214/U and RG-400/U are often specified for
duplexers.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On
Have forwarded the questions to AA3ID who has the amp apart. We are third hand
at least on this amp but it did
operate at around 60 watts for ten years at 145.110 feeding 800 feet of 7/8
hardline into a ham cut db224.
when the tower came down it was given to me and i misread the pencil
RG142/U cable is used all the time in duplexers. Extreme care is required to
ensure that the silver/copper plating is not scratched or nicked when the
connectors are put on and the pins on the center conductor needs to be soldered.
The better cable should be used where the RX and TX signals
I believe that the real problem is that the center conductor is solid. A
slight nick in it will eventually cause it to break due to cable flexing
fatigue at the weak point. RG-400 is often used instead and has a stranded
center conductor.
Chuck
WB2EDV
- Original Message -
Spec
What is the difference between real and un-real RG214?
There are some non-mil-spec RG214 varients out there. Sometimes they are
labeled as RG214 TYPE, or RG214 Commercial. These typically have double
braid like real RG214, but unlike real RG214, the braids are bare copper
instead of
The cables in duplexers are not under movement so the nick would not be the
issue there. The nick does expose the steel which is a ferro-magnetic material
that will cause intermodulation to occur at a much higher level. Plus, the
insertion loss will increase at that point and if there is a lot
Oops! I should have added that RG-223/U cable is also double-shielded with
silver-plated braids, and has a solid copper center conductor that is
silver-plated. It has a PVC jacket and solid polyethylene dielectric. The
Mil-Spec data sheet for this cable is also posted in the Files section of
So does that mean that in order for a cable to be labeled RG-223 it must
meet this mil-spec?
On Sun, Mar 7, 2010 at 6:57 PM, Repeater-Builder@yahoogroups.com wrote:
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the
Skip
I appreciate your reply. I currently have an old Johnson CR1000 that a
converted to the 440 band about ten years ago. It has worked ok but its time to
move on. I have been offered a remote receive site in the center of my town of
100,000. It is the top of a building about 230 feet high so
Yes. In fact, only those manufacturers who are listed in the QPL
(Qualified Products List) as making approved cable that meets the
specification are allowed to mark it in such a way as to lead the buyer to
assume that the cable is genuine Military Specification cable. Any cable
that does not
hi all
i am working on my snowmobile,i have to work on a special board that has a kind
of GEL to protect the circuit from
humidity...
i remember some years ago in a radio-mobile shop they add a kind of liquid that
you drop over this gel and it would melt it
someone maybe know what i am
Is it a gel or more like a potting compound ?
I used Methyl Ethyl Keytone (MEK) to open potted circuits from competitors when
i was in design and manufacturing engineering.
Worked great and even left identification of parts intact.
I don't suggest you specifically use MEK without further
Larry Horlick llhorl...@... wrote:
So in a duplex application, if the supply of
the better cable is limited, it's better to use
it on the rx side?
Depends really, there are high level RF locations where
I might want a bit of extra loss in the cable. If you
have a very low power solar UHF
k9bf k...@... wrote:
Skipp
I appreciate your reply. I currently have an old
Johnson CR1000 that a converted to the 440 band about
ten years ago. It has worked ok but its time to move on.
Why is it time to move on?
I have been offered a remote receive site in the center of
my town of
At 02:47 PM 03/07/10, you wrote:
Hey folks,
Any idea what would make an MSF5000 CLB EPROM controller randomly
reset (test lights coming on)? When it's not in self-check mode, it
works fine, but roughly every 3 mins, it resets itself.
Thanks,
Jared
One thing that comes to mind is the power
Is there a Two Way Radio Museum?
Not one of any substantial size that I've ever heard about.
And it would have to be a really, really large building.
Paul Plack pl...@... wrote:
Large building, yes...but you wouldn't have to pay
extra to heat it.
You'd have to take out a tarp fund
The question that pops into my mind concerns the proposed 200 watt power
amplifier. I have to wonder where the notion to run an alligator system
originated. I see four possible answers:
1. We have this 200 watt amplifier, so we are duty-bound to use it
regardless of whether it is necessary or
http://www.dynaloy.com/Products/tech_data_sheets/UresolveBlue411.pdf
73,
john WA1ABI
OK Guys
My two dollar question is:
How to determine whether the braids are silver or tin coated,
without taking into consideration the brand/name on the sheath,
or have I missed the fine print in this discussion? :)
73 John/VK4JKL
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