These comments were all VERY good advice Gary.
I would add some other comments to theirs...
When people here say good equipment we mean it. Ask someone in the
area who already has a repeater at a pay site what their lease says
about it, many specify very specific gear required that many
On Apr 22, 2008, at 12:25 PM, skipp025 wrote:
The 555 is one of the most useful electronic circuit chips ever
made. It has a fairly large number of possible simply configured
mono astable (cycle) circuit operations. And it's just as easy
to get lost when trying to use it for specific
There IS an article about temperature compensating
channel elements on r-b. Go to the Technical
Information section and search for Why should you
really spend $50 to re-crystal a channel element or
ICOM?
While the method you describe will get the crystal to
operate on-frequency at room
Nate,
You are so right about using a MPU for basic functions like replacing a 555.
If one learns the basics of a MPU in what would be a 555 application, this same
technology can be applied to many other applications...just change the software
and maybe add a I/O buffer.
In one MPU one can
Nate,
When you get going you go a lot :)
All good advice. Most repeaters are a valuable properity for free. One needs
to take the approach beggers cannot be choosers.
On the equipment it is so easy and inexpensive to pick up a GE or Mot rig for a
repeater it makes little sense to use a Ham
Eric,
I am having a netting problem with a Micor rcv ch ele now. Used same ele as in
the original at 155 MHz, replaced crystal with 147 MHz, but best it can do is
10 kHz low in freq.
Know 155 range Micor different from 147, but think they use same ch ele, but
maybe with slightly different
Fire Arms are good if you are there.
When I was in the Nam we put up mechnical ambushes as they were called.
About 15 claymores along a trail with a trip wire in the middle. Only real
problem is a FNG who knew nothing wanted so much to help and would connect up
the battery making the thing
Wayne,
One issue on the connectors for reconnecting coax.
Many make back to back type connectors for this. They are essentially the back
end of 2 connectors joined as one piece/connector. Mostly used where a long
feedline cannot be placed on one spool and must be joined or for other
There have been a number of cases where a store or home owner wired a booby
trap and someone got injured.
Outlawing this is the law in many states. It is mainly due to the intruder
might be a family member or fireman, etc trying to get in for good reasons.
I would think it best for any
At least here in Kansas we can now have full auto weapons and machine guns with
silencers, makes security a little quieter.
Anyway, why not just wrap your hard-line with burglar alarm tape, connected to
a dc relay. This would trip a dc horn or siren (old police sirens work well or
28 volt
Thats not a bad idea, I was getting tired of the weapon approach, I started to
think this was a weapon list.
Hook your alarm to an input on the repeater and it could alert you also if
someone tampered with it.
Rob - KS4EC
From:
Ron and Wayne,
I have several of those splice connections from a job where I got to remove
old Heliax on top of a building. They make them to go from the same size
cable to others also. If you have 1 5/8 Heliax you can convert to 7/8 or
1/2 inch but be warned, they may be expensive. They are
Skip,
The LM324 has many good features for low level requirements. High offset
voltage (2 typ, 7 max, always design to max) and cross over distortion has
always been an problem with much of what I do. It having 4 in a package is a
plus and it has its place.
I should not say it, but I would
Ted,
With me in the Tampa Florida with the Rays I have to look for another team and
always enjoy the Cubs. Guess from my Cincinnati days with the Reds. Would go
to game with Cubs and seems more Cub fans there than Reds. Of course this was
in an off season for the Reds which they have had a
Wayne
If you use the N male female splice you might want to look at how much
flexing the cable will get.
If this cable is 7/8 inch then the flex on the joint can be catastrophic,
especially if it is somewhere on a tower.
I would suggest a pair of EIA flanges to make a good mechanically strong
- Original Message -
From: Pat Hartleymailto:[EMAIL PROTECTED]
To: Wanda Bowenmailto:[EMAIL PROTECTED] ; Wandamailto:[EMAIL PROTECTED] ;
Tracymailto:[EMAIL PROTECTED] ; [EMAIL PROTECTED]mailto:[EMAIL PROTECTED] ;
Steve Greenemailto:[EMAIL PROTECTED] ; Sharonmailto:[EMAIL PROTECTED] ;
I bought my own as well. $500 for a one acre tract at 3000' (1000 ft
HAAT). It was a ex-American Electric Power microwave relay site.
Right now it's sitting empty except for the old transmitter building
and antenna masts. I would really like to use it for a repeater (or a
weekend getaway
I have about a dozen Micors on the air with the elements done this
way, and they are all rock solid. Some sites go from below freezing
to over 100F in the summer, and they stay right on. They've been
running close to 10 yrs now. Other than changing caps, what else
are they doing that makes
Hello All,
I'm going to be removing a low band receiver board from a Spectratac
housing and replacing it with a 900mhz receiver.
Does anyone know the manufacturer and part number of an SMA connector
that can be purchased and crimped on to the coax jumper in the
housing? If I cut off the RCA
Nothing wrong with using any good reference material you can
find in any potential design. Many of the people on this group
ask how they can best learn about repeater related electronic
circuits and I can't think of an easier method than kit building
a well done kit circuit.
We can always
I would recommend replacing all of the caps and inspecting all of the
traces around the caps to ensure none have failed due to a leaking
cap. After that I would see what you get for error codes and if fail
01/90 remains, get you hands on another spectra (bandsplit doesn't
matter) and swap
Moderators,
Why are we getting jokes on this list server? Isn’t there enough wasted
bandwidth on the internet already? I am telling all my friends NOT to send me
all kinds of that crap. Some attachments are 10Mb. Some people can’t get high
speed internet because they live in the country
to all concerned
It is I that sent the jokes
It was not and I repeat not intended to be on this or any other message board
I sincerely apologize to all
there is a list I use to send messages to a select group somehow this group got
listed onto that list
I have since removed the listing
Hello...
New list member here and first post.
I've been given a Motorola HV power supply and was told it came from a
1/4 KW repeater. I've spent 7 hours today searching the Internet and
have not been able to ID the beast. Perhaps someone on the list has
some info for me.
The markings on the
I have a fan cooling a remote base transceiver. The fan is on 24/7. I
would like to have the fan on only when the transceiver PTT is active
(active low). Alternatively, I would like to have the fan on only when
the RB is commanded to RX/TX mode. There must be many simple solutions
to this
And you just resent it all..
May not have been the best place to send it to, but thanks Ralph. The
little Heavens note was most welcome to me.
Tom WA0RTU
Tony Lelieveld wrote:
Moderators,
Why are we getting jokes on this list server? Isn’t there enough
wasted bandwidth on the
Ralph,
Guess it's happened to all of us from time to time. It is very east to hit the
wrong button and even easier to hit the button to condemn someone for a
mistake. Not all of us are perfect. I figured when you saw it you would
correct the problem and there was no need to jump down your
I have two CDM 1550's for link radios on UHF I want to feed with LMR-
400 because they are about 80ft runs up a commercial tower.
I need to get from LMR-400 to mini uhf connector on the radio.
Everyone has told me not to use the adapters, but to use a cable that
is PL-259 to mini uhf.
Is
I don't think there's anything special about the
connector or cable. You can just buy a regular
straight SMA male (crimp or solder) for RG400, use a
short piece of RG400, and attach it to the existing
N-female chassis socket. Or make/buy a short SMA to
N-male cable and install a bulkhead
Doesn't anyone check the website or do a google search anymore??
http://www.repeater-builder.com/zetron/zetron-model-38a-inst%20manual-025-9043y.pdf
Scott
Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Rd
Boswell, PA 15531
- Original Message -
From: Jack Davis
To:
You'll place a lot of strain on the mini-UHF connector
on the back of the radio if you use a small adapter
connected directly to the coax.
Use a short jumper made from RG400 (more flexible than
RG142) with a mini-UHF-male on one end, and whatever
you need to mate with the LMR at the other end.
This has been taken care of. Enough discussion on the topic.
Scott - List moderator
Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Rd
Boswell, PA 15531
- Original Message -
From: Tony Lelieveld
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, April 24, 2008 1:39 PM
Mike
If you want a adaptor or a cable made up try these folks
www.pasternack.comhttp://www.pasternack.com/
Ralph
- Original Message -
From: Mike Wolthuismailto:[EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.commailto:Repeater-Builder@yahoogroups.com
Sent: Thursday, April
OK, Rob, I'll bite...
If the cable's been cut, activating the alarm, how will the repeater alert you?
This sounds like a solution I'd come up with, then later say, ...d'oh!
73,
Paul, AE4KR
_
From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of
Robert Pease
Well it won't be broadcasting every 5 minutes! What else?:-)
Randy
--- In Repeater-Builder@yahoogroups.com, Paul Plack [EMAIL PROTECTED]
wrote:
OK, Rob, I'll bite...
If the cable's been cut, activating the alarm, how will the
repeater alert you?
This sounds like a solution I'd come up
Well, if it has reverse autopatch on your controller, you could program it to
call you by land line. Program the macro with something like- Danger Will
Robinson lol
Ok my bad.
- Original Message -
From: Paul Plack
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, April
Steve wrote:
Anyway, why not just wrap your hard-line with burglar alarm tape,
connected to a dc relay. This would trip a dc horn or siren (old police
sirens work well or 28 volt locomotive horns) and halogen lights. A nice
small camera to record the bad guys crapping their pants and
I guess you are right... DOH
lol
Maybe you'll get lucky and be the last cable cut!
Rob
From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of
Paul Plack
Sent: Thursday, April 24, 2008 4:42 PM
To: Repeater-Builder@yahoogroups.com
I have picked up some short cables (about 6 or 8 inches) with N female
bulkhead fittings on one end and mini UHF male on the other end just for
that purpose off of ebay.
Just do a search for mini UHF and see what comes up.
tom n8ies
[Original Message]
From: Mike Wolthuis [EMAIL PROTECTED]
Hi Bob,
Thanks for the reply. I too didn't think that there was anything
special about the cable or connector. I was just looking to see if
anyone knew of a supplier and part number for the SMA crimp on for
RG400. ( I guess I should have typed it that way to begin with!)
Thanks again!
Adam
Mike,
Another source for your jumper cable or adapter might be the RF Connection:
http://www.therfc.com/
I just had Joel make up a cable I needed for my 900 MHz MSF5000 repeater
conversion. Very good quality and reasonable pricing, plus quick
turn-around time. (I had tried my own hand
There are 2 circuits for fan contollers on the Repeater Builder website at
http://www.repeater-builder.com/projects/project-index.html
73,
George, KA3HSW / WQGJ413
- Original Message -
From: John Transue
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, April 23, 2008
Being a fire chief one of the standard questions I always ask at any fire is
do you have any loaded fire arms inside? When loaded guns get hot the shell
discharges just like it is being fired! Doesn't matter if the safety is on or
not.
I personally like the animal electric fence idea. Hook
Mike, back during the Nam days I was supporting some OV-10s at NKP Thailand and
one augered in on takeoff at the base. We all started running out to where the
pilot had ejected to see if we could help when all of a sudden the burning
aircraft started popping and shells started ratteling off
I know that Mouser, Jameco, and Digikey have SMA
connectors, although they might be solder rather than
crimp. You'll probably even find some on eBay, and
maybe even an entire cable.
Bob M.
==
--- Adam C. Feuer [EMAIL PROTECTED] wrote:
Hi Bob,
Thanks for the reply. I too didn't think
It's not just netting the crystal; there's a lot more to compensating a
crystal than simply compensating for temperature. It is easy to assume that
all ICM or Bomar does is to tweak a few capacitors so that the crystal can
1) be brought to the proper frequency with the trimmer centered, and 2)
I have a uhf msr2000 which I recently changed frequency to 464.075/469.075.
Original freq was about 1.5mhz away. I sent the elements in and had them
recrystaled. After I installed them and tuned up the receiver it worked pretty
well for a month. I noticed it loosing sensitivity lately so I
Did some searching, and it looks like splices would run maybe twice or
more the cost of one male and one female.
I found about $30 or so, maybe more, I forget, just for the inner part,
and the only shell I found by itself was out of sight. A splice for
larger Heliax seems to be around
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