Looking for a GE Mastr II UHF Receiver in the 406-420 split. Our
radio club operates a NOAA Wx radio system for the NWS. The UHF link
receiver is failing, and looking for a replacement.
Thanks,
JIm Duram, K8COP
Yahoo! Groups Links
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At 02:08 PM 12/28/2005 -0800, you wrote:
Hey Mike, you are probably old enough to remember when JJ Glass
had a surplus bin of old / used vacuum tubes. I think it was the
5D21 (???) that had solid gold grids. I think there is one of
those in my garage. You can tell the grids are gold as
Looking to buy the 1.0 Mhz reference oscilator. Mine failed and
looking for a replacement. This one is the square octal plug in
assumbly. Anyone having a dead 1200 that wants to sell parts let me
know.
Also, anyone familar with the failure modes of the oven in this unit
contact me off
TNX, Roger. Oh, well.
Dick
- Original Message -
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: 29 December, 2005 20:58
Subject: Re: [Repeater-Builder] WTS Sinclair Duplexer
VHF
Dick,
Yours is the 15th reply. It has been claimed and will ship Jan 3 to
Hi Jim
If you are looking for an inexpensive controller (84 bucks) with many
features, including a full control receiver input), DTMF control,
a seperate CTCSS board input and lots more check out the ICS Basic
repeater controller.
www.ics-ctrl.com
73
Brian
ka9pmm
jrinnebraska wrote:
I'm
Replacing a small, rooftop (about 90ft) repeater setup. The
prior system had no lighting protection, just straight coax from antenna to
duplexer. I was looking into getting a polyphaser if needed but there is
no way to ground it that I can tell. Two options I have would be to
somehow tap
Don't waste your money on a PolyPhaser unless you can implement a good
ground system. And I'm not talking about a simple ground to an
electrical outlet. And a PolyPhaser on the antenna with none on the
power line makes the entire process worthless. ALL lines attaching to
the outside world need
If your antenna is metal
and of DC-grounded design, as most commercial antennas are, then the base of the
antenna should definitely be connected to the nearest structural metal- be it
the roof, the coping, an I-beam, or whatever. This conductor should be
very heavy-gauge copper wire, #2
jrinnebraska wrote:
I'm putting up a repeater in my local area--coordinated frequency is
146.895, going to tone it at 123.0.
The repeater is a Kenwood 270--I know it's not a big Motorola box,
etc., but the price was right--FREE! I've had it checked and reset
for the new frequency and
Ten out of three engineers are dyslexic!! Could be the case here...
mikey
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Jim
Sent: Friday, December 30, 2005 3:47 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] New
If the building has a steel infrastructure, your lowest-R and lowest-L path
will likely be to tie to the building steel. However, there are code
implications for doing so (as well as any other tower grounding) so be sure
to check local codes and/or NEC. If building steel isn't an option you may
Anybody got any info on DB Products duplexers #DB4003 148-174 MHZ
cans? Will they tune down to 2M band? Maybe a link to a spec sheet?
Thanks!
Scott NA4IT
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Whatever you do, DON'T connect the
polyphaser grounding lug to an AC outlet
ground lug!!! That would bring
HUGE voltages and currents into the building
electric power system and expose
everything on it to disaster!!! In which case
you'd do well to carry enough insurance
to replace all of
--- In Repeater-Builder@yahoogroups.com, Scott [EMAIL PROTECTED] wrote:
Anybody got any info on DB Products duplexer #DB4003 ...
___
According to the Decibel Products catalog:
Model DB-4003 is a 3-cavity bandpass duplexer with one
Someone correct me if I'm wrong, but putting in your own ground rods and NOT tying them to the existing electrical ground system is a Bigger no-no. That would be creating a second ground system for the building and creating a potenital difference in grounds. That would be a bigger problem, and
The cable guys around here don't put in ground rods. They bond to the
existing electrical ground system.
Chuck
WB2EDV
Someone please tell the cable guys to stop putting in the 4ft rods and
creating ground loops! ;)
Tom
W9SRV
*//*
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Jim, is the present link receiver a MASTR II may be it could be
repeaired, or are you looking to upgrade.
AC0Y
--- In Repeater-Builder@yahoogroups.com, k8cop [EMAIL PROTECTED] wrote:
Looking for a GE Mastr II UHF Receiver in the 406-420 split. Our
radio club operates a NOAA Wx radio
I think what Dick was getting at is that the Polyphaser grounding lug needs
to have its *own* ground separate from any other ground. If you tie the
Polyphaser to the electrical ground of the building, youre defeating the
entire purpose of having it
But then again, Ive been wrong before.
Boy I can tell that none of you live in Florida where a GOOD
GROUND doesn't exist on a small scale (for a home or small
business) One strike on a rod here makes the sand around the one rod
turn into a glass insulator. Want to see a good ground? look at the
ground at a 69KV or 125KV sub
Scott, DB products duplexers are still made by a group called DB
Spectrum still located in north Dallas. It's the same group that has
always made the products just spun off/sold off from DB when they were
bought by Andrew Corp. You might try a search for their web site.
AC0Y
--- In
Roger that, Mark.
A lightning diversion system needs its own low impedance path to ground
because the huge currents involved can do strange and unpredictable
things if they get into the building's AC power.
A full threat lightning attachment has millions of volts before the air path
ionizes.
No info available on the Andrews site...
--- In Repeater-Builder@yahoogroups.com, Coy Hilton [EMAIL PROTECTED] wrote:
Scott, DB products duplexers are still made by a group called DB
Spectrum still located in north Dallas. It's the same group that has
always made the products just spun
On Dec 30, 2005, at 7:10 PM, Dick wrote:
After a lot of years at Lockheed designing lightning protection for
military aircraft, I've developed a very healthy respect for the
stuff.
Out of curiosity, how does one design lightning protection for aircraft?
I've avoided worrying about
Looking for a new (used) one to replace this one until I can get the bad
one repaired. Want to get the link back up and going ASAP.
Thanks,
Jim
mail2web - Check your email from the web at
http://mail2web.com/ .
Paul Yonge wrote:
On Dec 30, 2005, at 7:10 PM, Dick wrote:
Out of curiosity, how does one design lightning protection for aircraft?
I've avoided worrying about lightning protection for the mobile
repeater van I'm putting together. Should I be worrying?
Paul, I wouldn't worry unless you plan to operate your van on a
mountain top in one of those impressive upstate NY lightning storms.
As for protecting aircraft, first you spec out all avionics to survive a
brief
500 V blast on any wiring that goes outside the fuselage (typically antenna
cables).
Kevin:
The StaticBuster is similar to the little static discharge wicks used
on
aircraft to dissipate the static charge built up during flight.
They work.
Dick
- Original Message -
From: Kevin Custer
To: Repeater-Builder@yahoogroups.com
Sent: 30 December, 2005 16:29
Subject:
Thanks for the info, I won't bother bidding on them. Sure would have
been nice if the 2M band had been 10MHz wide
Scott NA4IT
--- In Repeater-Builder@yahoogroups.com, nj902 [EMAIL PROTECTED] wrote:
--- In Repeater-Builder@yahoogroups.com, Scott [EMAIL PROTECTED] wrote:
Anybody got any
Since there is no real path to ground, lightning is not attracted to
aircraft, and what little attraction there is would be carried on the
skin of the craft. There is little risk to the interior.
Joe M.
Paul Yonge wrote:
On Dec 30, 2005, at 7:10 PM, Dick wrote:
After a lot of years at
Right, Joe:
Typically, an airplane in flight gets hit when it flies thru an area where a
lightning static charge is building up. The airplane can provide just
enough conductivity to allow the path to ionize. That's when the
lightning happens and it goes thru the airplane skin
Dick
-
As the headline in The Naked Gun movie read:
Dyslexia for Cure Found!
Yes, it's a TKR720 repeater, not a 270 handheld.
Coincidentally, I have a Kenwood 272 handheld that I use for Emergency
Management work here in not the end of the world, but you can see it
from here Nebraska.
And thanks
On Dec 30, 2005, at 7:42 PM, Dick wrote:
Paul, I wouldn't worry unless you plan to operate your van on a
mountain top in one of those impressive upstate NY lightning storms.
We do have some great ones. It's possible I might seek out a hilltop
location to stay out of the way of the incident
http://www.dbspectra.com Good people to work with.
Jamey Wright
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Coy Hilton
Sent: Friday, December 30, 2005 6:03 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Decibel
A good ground rod to the frame would help a lot.
Generally, you're safe in your car during a lightning hit,
since you're surrounded by a Faraday cage. Tires
have about 50 K ohms to ground, so a good solid
ground rod connected to the frame would help protect you.
The antenna will still be a target
On Dec 30, 2005, at 7:29 PM, Kevin Custer wrote:http://www.repeater-builder.com/rbtip/staticbusterorder.htmlSolves more than lightning problems...Kevin -It sounds good. I'll probably have two mirror-mounted antennas because of the height of the Sprinter van - one on the GMRS simplex repeater
On Dec 30, 2005, at 8:29 PM, Dick wrote:
A good ground rod to the frame would help a lot.
Generally, you're safe in your car during a lightning hit,
since you're surrounded by a Faraday cage.
What a great line! Hey -- want to go for a ride in my Faraday cage?
Yahoo! Groups Links
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Is it legal to keep Faradays in a cage? lol
Dick
- Original Message -
From: Paul Yonge [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: 30 December, 2005 17:37
Subject: Re: [Repeater-Builder] polyphaser Help
On Dec 30, 2005, at 8:29 PM, Dick wrote:
A good ground rod to
On Dec 30, 2005, at 8:39 PM, Dick wrote:
Is it legal to keep Faradays in a cage? lol
Dick
Only during a blockbuster Upstate New York lightning storm. The rest
of the time, I let it ride up front.
Paul
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You need a license from the Faraday Cage Commission (FCC).
Chuck
Dick wrote:
Is it legal to keep Faradays in a cage? lol
Dick
- Original Message -
Subject:
Re: [Repeater-Builder] polyphaser Help
On Dec 30, 2005, at 8:50 PM, Chuck Kelsey wrote:
You need a license from the Faraday Cage Commission (FCC).
Well, I just bought my GMRS license last month and I sit for my Tech
license next week. (That will have to do because people tell me I'm
too old to have any Extra class help me
Chuck Kelsey wrote:
You need a license from the Faraday Cage Commission (FCC).
Chuck
Dick wrote:
Is it legal to keep Faradays in a cage? lol
Dick
- Original Message -
Subject:
Re: [Repeater-Builder]
minor point of clarification. The DO160 document referred to is published
by RTCA and not the FAA. The latest version is DO160E released about a year
ago. It is an environmental test procedures document that covers much more
than just lightning. Section 20 covers indirect effects of lightning
Thanks Jamie. The ones I was looking at were not listed, but someone
else had posted they are 5MHz spread, so they won't work on 2M anyway.
Shame too, the bid was at $75 with less than a day to go!
--- In Repeater-Builder@yahoogroups.com, Jamey Wright [EMAIL PROTECTED]
wrote:
I don't know when to give up.Your lightning deversion system can run straight back to your own grown rods, but your ground rods need to have a bonding conductor to the electrical system ground rod. The lower impeadence path is still to your rod, but the entire site ground potential is
At 09:25 PM 2005-12-30 -0800, you wrote:
I've been to Florida and saw a relatives house under construction. Just
bond to the plastic cold water pipe! ;)
BWAHAHAHAHAHA
Even I, a newbie ham, know that's just plain wrong. And whoever did that
clearly should transfer to a job as a sanitation
I actually saw an install where a MSS did just that - they
had the ground connected to a plastic water pipe!
Joe M.
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At 09:25 PM 12/30/05, you wrote:
(big chunk cut out)
I've been to Florida and saw a relatives house under construction. Just
bond to the plastic cold water pipe! ;)
Awaiting my lashings.
Tom
W9SRV
I would have taken several digital photos of the ground clamp, plus
shots of the signage
Hello to the list. Has anyone used or using the MFB1503 Series
antenna as a repeater antenna? If so, what do you think of it? This
will be for 2 meter use, at about 3,200' here in Washington state; will
get ice and snow build up. Any comments? Thank you.
Rod
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