Thanks for sharing your circuit, Bob...
Have you done any measurements to see how constant the temperature is
maintained over time? Looks like a neat little circuit for a couple of
other applications.
73, Tony W4ZT
[EMAIL PROTECTED] wrote:
At 1/8/2007 15:22, you wrote:
Hi Bob,
I would
I seem to remember Myth Busters busted that one ;)
73, Tony W4ZT
Mike Perryman wrote:
You must be talking about the Darwin Award story.. LOL!
73
Mike Perryman
www.k5jmp.us
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of
shame_you_promise wrote:
hi im thus anybody here who knows on how to build a very simple
repeater controller with-out any programming just a verry simple
repeater controller...and also how to connect the two radio tnx...
This is actually a very simple thing to do but it will not meet
Yup.. that schematic, the parts layout, the parts list and photographs I
took of both the UHF and VHF units are on my web page at
http://w4zt.com/zmatch/ and were posted here 1/25/2006.
73, Tony W4ZT
John J. Riddell wrote:
This may already have been sent but here it is again...the
Lee Williams wrote:
I on the other hand run my fans 24/7,why switch them at all?
Many repeater locations are very dirty. Running fans when there is
nothing to cool just circulates the dust and dirt and deposits more of
it inside your equipment. Many folks haven't re-discovered the
You can configure Thunderbird to put messages from different accounts
into one folder if you like. When I switched from Eudora to Thunderbird
all the imported messages were brought on board in their respective
folders and all of those folders were placed in one folder in
Thunderbird. After
Two dots don't work... try one:
http://www.hamtronics.com/r121.htm
73, Tony W4ZT
Mark A. Holman wrote:
For some strange reason I cannot access their web page are they down 4
updates ?
I did all the settings check.
mark holman
Paul Yonge wrote:
Hamtronics has an R121 Aviation
It is easy to criticize the Red Cross when you aren't a participant or
have had a family member who is.
My step son took leave from his administrative job in a comfortable
Connecticut hospital to work as a volunteer for two weeks in a shelter
located in a Slidell, LA high school gymnasium,
Here is my version of a 12 Volt dummy load:
http://astron.w4zt.com/dload.html
And, for those of you that are like me and would like to load test HIGH
VOLTAGE supplies, here's my high voltage dummy load:
http://gs35b.com/hvload/index.html
Careful... either of them can burn you... BAD. The
Eric Lemmon wrote:
Lee,
I appreciate your comments, but I can rebut them easily. I have seen too
many clamp-type connectors pull apart, usually because they were
over-tightened during assembly. Take a close look at a MIL-spec clamp-type
N connector, and you can see that the knife-edge
Too often folks take pictures from unknown sources and credit them with
unbelievable things.
Read the truth about the so called lion killing mule:
http://www.truthorfiction.com/rumors/m/mule-lion.htm
A little research usually clears up these questions.
73, Tony W4ZT
vmckever wrote:
Some
Here's a link to the GE Z-Matcher info that I posted on my page in
January of 2004 for Mike Morris to grab and make a page on
repeater-builder.com. I can't seem to find it on RB either so here it is:
http://w4zt.com/zmatch/
73, Tony W4ZT
Jim Cicirello wrote:
Laryn K8TVZ wrote:
OK, time to
Here's a link to the GE Z-Matcher info that I posted on my page in
January of 2004 for Mike Morris to grab and make a page on
repeater-builder.com. I can't seem to find it on RB either so here it is:
http://w4zt.com/zmatch/
73, Tony W4ZT
Yahoo! Groups Links
* To visit your group on the
Awww, c'mon Kevin, that'd be a good way to raise funds (RB poster or
tee?)! Add a little Tesla coil so you'd have a few arcs and sparks and
it'd be even more interesting!
Happy New Year!
Tony King, W4ZT
Kevin Custer wrote:
Kevin King wrote:
I want a picture of you in slippers scooting
I had a significant problem with RFI from my Napco MA1008 alarm panel.
The search took me to the keypad cable as the primary source of the RFI.
I ended up with clamp on ferrites (2) at the keypad on the ribbon cable,
and (1) at the control panel with the keypad cable wrapped through it
twice.
Sinadders are frequently sold on that auction site... begins with an
e, ends with a y. I bought both of mine there and both for less
than that $80 figure. Check it out, take your time, you'll get a nice
one for a reasonable cost. There is one listed there now:
SERA does not make their frequency database available on line.
You can do a Google search for repeater freq Tennessee and get lots of
hits for sites that list frequencies throughout the state.
73, Tony W4ZT
Russ Stafford wrote:
www.sera.org
- Original Message -
*From:*
Dave,
A relatively easy thing you can do is to put a Mastr II exciter in a
shielded box with a BNC connector for output. You can easily connect
attenuators directly to the box in line to get your weak signals. This
works on both VHF and UHF. You can also add a small audio oscillator to
Great job Dennis... thanks!
73, Tony W4ZT
wieckdj wrote:
Here you go:
Check it out at http://www.ku3o.net
Dennis
N4ZKR
Yahoo! Groups Links
Yahoo! Groups Links
* To visit your group on the web, go to:
That's an interesting device for a computer but I wonder why anyone
would go to all that trouble (except for fun of course) when you can
easily cool a Mastr II continuous duty PA with the same number of fans
and it'll run cool and comfortable forever. For the price you'd pay for
that water
I have used the switch shown here on an earlier Mastr II mobile
conversion I did. This switch closes at 110F and opens at 90F. 73, Tony
W4ZT
kc4wgh wrote:
Back again. Any suggested on a vendor for a temperature switch to
turn the 12 vdc fans ON and OFF. I used a test setup this morning
My apoligies, I meant to include the URL:
http://repeater.w4zt.com/uhf/gemastr2
I have used the switch shown here on an earlier Mastr II mobile
conversion I did. This switch closes at 110F and opens at 90F. 73, Tony
W4ZT
kc4wgh wrote:
Back again. Any suggested on a vendor for a temperature
to the receiver, and i
would need to install the pad there.
Brent
- Original Message -
From: Tony King, W4ZT [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 24, 2005 11:22 PM
Subject: Re: [Repeater-Builder] Desense im guessing?
Cody Hayden wrote:
db pads
I receive the signal here in Union City mid scale on the tall antenna.
Verified it is transmitting a 100 Hz tone also.
73, Tony W4ZT
georgiaskywarn wrote:
Folks,
We need your help. As of 5:50am (local) there is a signal (Sounds
like a nice clean full quieting dead carrier. This is from
Cody Hayden wrote:
db pads are bandaids and not cures..get a better
duplexer..problem solved..
It is common practice to use 6 to 10 db of attenuation between a new
high gain (typically as much as +18 db) GaAsFET low noise amplifier and
an older receiver. The gain of the preamp is about 10
Mike,
What frequency are you guys on? How high is your antenna? How long has
this problem been going on? How often does it happen? What's the call
of your repeater?
There might be an explanation other than intermod. There is one VHF
repeater in metro Atlanta (West) right now that frequently
I think the important issue is how the capacitor reacts when passing RF
current. A capacitor that works fine in one application may not stay
within tolerance when you turn up the heat from within.
Most folks using trimmers in RF power amplifiers use good quality mica
compression trimmers or
Doing an advanced search on the FCC ULS yields but one result for Heiniger:
Call Sign WB8IIL Radio Service HA - Amateur
Status Expired Auth Type Regular
Dates
Grant 11/15/1988 Expiration 11/15/1998
Effective 11/15/1988 Cancellation
Derek,
Take a look at this one. You can build your own and by choosing
components you can can handle all the power you want:
http://home.datacomm.ch/hb9abx/duplexer.html
and for hf-6/2/70cm:
http://home.datacomm.ch/hb9abx/diplhf6m-vuhf.html
The weak link will be the capacitors and you can
battery chargers and the Ibex
units seem to fit the bill for my application. Using your link, I checked
their web site but they state they will not sell to individuals. Is this
true and is there a way around this?
Richard, N7TGB
-Original Message-
From: Tony King, W4ZT [mailto
One of the best ways to manage the charging of your batteries is to use
a multi-mode charger designed to properly charge and maintain them.
Ibex http://www.ibexmfg.com carries two 3 mode chargers that are very
well suited for the job. If you look at their web page under the 12
volt chargers,
The Wire Man carries it:
http://thewireman.com/coaxp.html
and complete specs at:
http://thewireman.com/coaxdata.html
Item #111
RG214/U
MFG ADC
MIL SPEC
per ft/ft 1.88
per ft/100 1.65
per ft/500 1.568
per ft/1000 1.485
73, Tony W4ZT
At 07:48 PM 12/28/2004, you wrote:
Gary,
You can see the specs including curves etc for the DCI filters at
http://www.dci.ca/?Section=Amateur
and they should answer your questions about them.
73, Tony W4ZT
At 11:00 PM 12/26/2004, you wrote:
Eric,
Thank you for the explanation of the
TWPC-4508-2 bandpass filter and its
- Original Message -
From: Tony King - W4ZT [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, December 23, 2004 8:16 AM
Subject: Re: [Repeater-Builder] Talking Clock
The Speaking Clock works pretty good and is available as FREEware
here:
http://www.lux
Message -
From: Tony King - W4ZT [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, December 23, 2004 8:16 AM
Subject: Re: [Repeater-Builder] Talking Clock
The Speaking Clock works pretty good and is available as FREEware here:
http://www.lux-aeterna.com/clock/
73, Tony
The Speaking Clock works pretty good and is available as FREEware here:
http://www.lux-aeterna.com/clock/
73, Tony W4ZT
At 01:12 AM 12/23/2004, you wrote:
Can anyone tell Me of A Software Talking Clock program , I had a old radio
Shack one that I had modified yrs ago on the repeater and it
At 08:57 PM 12/3/2004, Paul wrote:
snip The only down side that
I can see is people that don't have a repeater directory in front of them
would not be able to talk on the repeater. A ID with a voice announcement
about the CTCSS tone frequency would/and is going to fix that problem on my
Unfortunately, Nate apparently missed the entire point...
At 08:37 PM 12/2/2004, you wrote:
As Dennis Miller would say... I don't want to get off on a rant here,
but...
oh but you did...
Tony King - W4ZT wrote:
Gentlemen, if you can't offer sincere help or an opinion that's
relevant
Hi Barry,
very carefully risking a brief step into rules discussion, my apology
In part 97.205
(http://www.access.gpo.gov/nara/cfr/waisidx_03/47cfr97_03.html) there's
no provision for anything other than a call sign assigned to an individual
or a club. FCC assigned call signs for amateur
Slightly off topic but here goes:
Just got a new FT-897D at the hamfest and want to run it along with the
Alinco DR-600 in the truck.
My question is, how much physical separation must I have between the
VHF/UHF antennas to prevent damaging either radio while transmitting on the
other?
Nitrogen doesn't expand and contract with temperature???
At 11:45 PM 11/17/2004, Butch Kanvick wrote:
HI, Everyone
The switchover to Nitrogen is sweeping the country, plus they offer free
Nitrogen checks.
Nitrogen molecules, do not expand when heated and they do not shrink when
the temperature
I believe you'll find the following interesting:
Gay-Lussac and Avogadro's Law
* At a given temperature, the number of moles of a gas is directly
proportional to its volume.
* The molar volume of a gas, regardless of its identity, is constant
* n/V = constant (at constant T and
At 01:11 AM 11/18/2004, Don KA9QJG wrote:
That was such a good explanintion about tires , I recall seeing fittings on
Large coax at the Police Communications Center and I ask the radio Man what
it was for and He just said it was Nitrogen. and I was just a Police Sgt and
a Ham and would not
Oh what a waste, Neil ;)
73, Tony W4ZT
At 11:57 PM 10/25/2004, Neil McKie wrote:
I got a 5' one outside in the shed - am thinking about making
a bird bath out of it.
One problem though, how to keep it from freezing ...
Neil
Tony King - W4ZT wrote:
Use a multiswitch
Use a multiswitch.
I'm working on a 48 dish right now for looking at 101 alone
;) Hope to be rid of a LOT of rain fade.
73, Tony W4ZT
At 09:00 PM 10/23/2004, you wrote:
Tom,
a little help here? if I
am going to look at sat. A and sat. B with 2 dish's is there
a way to hook them into the
.
Thanks to the group for tolerating this slightly off topic thread
:)
73, Tony W4ZT
At 11:00 AM 10/24/2004, Maire Company wrote:
What
direction would I go to look for one. any model you have the best
luck with? thanks
- Original Message -
From: Tony King - W4ZT
To:
Repeater-Builder
Coy, that was my first question to you 15 Oct, are you sure it's a
Diamond? because all of them I've seen had weep holes next to the
connector. 73, Tony W4ZT
At 08:49 PM 10/18/2004, you wrote:
Well, I contacted Diamond Tech support today about the X500. His
response was... Are the weep holes
Coy,
Best advice from here is to make sure the weep holes in the bottom are open
and never plugged with anything including silicone, or spiders. Some of
the other manufacturers don't put them in and really have water buildup. I
have used several Diamonds and never had water build up inside
Coy, are you sure it's an Diamond X500? All the Diamond antennas I have
messed with have weep holes right in the bottom near the connector which is
one of their better options over some of the competition. Other knock off
antennas don't seem to have them. Double check they aren't covered if
I recently wondered the same thing about a Phelps Dodge six cavity duplexer
here. I found that all six cables including the two to the tee connector
were the same length: 8-3/4 inches tip to tip on PL-259 connectors.
(http://repeater.w4zt.com/duplexer/)
The problem here was noise, lots of it,
You can find harness info at: http://www.w4dex.com/kc4fwc/ant.htm
73, Tony W4ZT
At 11:41 PM 10/4/2004, you wrote:
Does any one know the formula to make a harness for 2 of the db-212
and for 4 of them?Also how far apart?thanks Mike KC8FWD
I have a PDF file at work on the DB-212 which gives
At 09:57 AM 10/2/04, Wade - KR7K wrote:
As long as you are using 1 antenna system for TX and another antenna system
for RX then that will work without a duplexer, if you follow a few
guidelines. First, you have to use gain antennas (not 1/4 waves verticals).
Unity gain, omni-directional
At 09:03 AM 8/30/2004, Joe D wrote:
You could use my free path analysis tool, rfProfiler-Light, to
predict the path loss in various directions from your transmitter
site.
http://www.rfsoftware.com/rfpl/downloads.shtml
It is not as slick as the expensive programs, but what do you want
for free!
At 05:19 PM 7/26/2004, you wrote:
snip
Definition of Analog
8 Track Tapes
Cassette - dang near
Steel Cars
How Times have changed
Mathew, you forgot one! The HUMAN BEING... we're all analog... so no
matter how many digital systems are out there, they all have to come back
to analog to
You may find this link helpful when looking at the matching harness for
these dipoles: http://www.w4dex.com/ant.htm
It's appeared here before but will be helpful to see it again.
73,
Tony W4ZT
At 01:52 AM 4/18/2004, you wrote:
--- Chuck Kelsey [EMAIL PROTECTED] wrote:
Just curious... how
Or simply go to the Government Printing Office:
http://www.access.gpo.gov/nara/cfr/waisidx_03/47cfr97_03.html
73,
Tony W4ZT
At 12:08 PM 4/10/2004, Eric Lemmon wrote:
For those list members who need a copy of Part 97, but don't want to
wade through the CFR Documents site, here are some links to
At 06:59 PM 2/11/2004, Danny Allen
[EMAIL PROTECTED] wrote:
Does anyone know of
someone in the Marietta,Ga area that can reprogram a DB-4072
duplexer?
Danny,
What frequencies are you moving it from/to? I may be able to help
you if you're not in too big of a hurry. (I'm 20 miles South of
you)
At 01:01 PM 1/27/2004, Dave / NØATH wrote:
I would certainly be interested to know where you obtained the digital
meters - that looks really nice. I wonder if they are illuminated?
The meters came from Marlin P Jones, http://www.mpja.com/, and the part
number is 12306 ME. Although their web page
Couldn't agree with you more. The important point is that you can't insert
an SWR meter or wattmeter in the line to make adjustments and then take it
out. The GE Z-match gives you the directional coupler which gives you a
leg up on the adjustment process. Otherwise you are stuck with the max
At 11:10 PM 1/26/2004, you wrote:
Why can't you take the swr meter out ? The Z-matcher is after the place
where the swr meter is.
The purpose of the matcher is for minimum swr or reflected power, the same
as the internal matcher of the GE repeater.
That's true, and if you could achieve a perfect
Very nice pictures and good job getting component values for the EMR Z-matcher.
One question comes to mind and that is, how are you going to adjust it?
Lacking a built in directional coupler it would appear that the only thing
you could do would be to adjust for maximum transfer of power as
Z-match update:
I have posted scans of the Mastr II Z-Match documentation including
schematic, board layout, parts list, tuning instructions and my
pictures: http://w4zt.com/zmatch/
73,
Tony W4ZT
Yahoo! Groups Links
To visit your group on the web, go to:
I use this one: http://repeater.w4zt.com/circuits/fanptt.html
Modify it as you see fit.
I also put a White-Rodgers fixed setting temperature switch (3F01-111 which
closes at 110F and opens at 90F), available from Grainger
http://grainger.com, in parallel with the relay and in contact with the
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