Re: [[[Re: [[Repeater-Builder] Spectrum Communication SCR1000 VHF Manual]]]]

2003-11-25 Thread Ken Arck
At 09:59 PM 11/25/2003 -0600, you wrote:

Of  course, any transmitter can have that statement said.

---Wasn't that VHF Engineering's motto? :-)

Ken

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Re: [Repeater-Builder] ArGoSoft Mailing List Server

2003-12-14 Thread Ken Arck
At 06:29 PM 12/14/2003 +, you wrote:
Please send mail to [EMAIL PROTECTED], containing word HELP as the
first non-blank line for the list of available commands.

Wonderful...
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RE: [Repeater-Builder] ArGoSoft......

2003-12-14 Thread Ken Arck
At 10:40 AM 12/14/2003 -0800, you wrote:
Looks like something is misconfigured on his end.

---I'm not a SysAdmin. I only play one on Repeater-Builder





 

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Re: [Repeater-Builder] Mitrek radio

2003-12-15 Thread Ken Arck
At 10:54 PM 12/15/2003 -, you wrote:
I am new to this board, can someone please help? I am looking for a 
good way to convert a mitrek uhf radio into a repeater. Can this be 
done without any controllers and extra equiptment? If so, can 
someone please supply some links?

http://www.repeater-builder.com/rbtip/mitrek-index.html

Ken
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Re: [Repeater-Builder] TPL website ??

2003-12-16 Thread Ken Arck
At 11:48 AM 12/16/2003 -0500, you wrote:
Does anyone know if there is a web site for TPL amps ?

Try http://www.spuriousunstablenevermakethepowerclaimed.com

Ken
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Re: [Repeater-Builder] Interesting scam

2003-12-22 Thread Ken Arck
At 01:07 PM 12/22/2003 -0500, you wrote:
 .. and someone tell me how to mod my scanner where it will pick up
conversations from someones home stereo?

---Seems only fair. My neighbor's home stereo picks up my SSB
transmissions! g

Ken
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Re: [Repeater-Builder] Off topic questions

2004-01-03 Thread Ken Arck
At 08:21 PM 1/3/2004 -0800, you wrote:

  Might you need that modification diagram for one of your iders? 

Nah. I replaced the dynamotor with a T supply, the code wheel with an
8 track tape and the mechanical timers with an Agastat.

Must keep up with technology ya know :-)

Ken
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Re: [Repeater-Builder] Off topic questions

2004-01-03 Thread Ken Arck
At 09:14 PM 1/3/2004 -0800, you wrote:

  The 5V had a vibrator power supply.  You *do* know what a vibrator 
 is ... ? 

---Ooooh... you mean in the context of radio! Of course! g

  I have one of the SOS red plastic wheel ider's around here.  Every 
 time I see it, I think of your booth display at Rickreall.  Might 
 you need to borrow it for your booth, February 21st?  

---Hah! Be there or be square

Ken
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Re: [Repeater-Builder] Off topic questions

2004-01-03 Thread Ken Arck
At 10:28 PM 1/3/2004 -0800, you wrote:

  Ok, I will bring it just for you ... will you have power at your 
 booth? 

You bet. I always have power at my booth.. Electricity too.

Ken



 

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Re: [Repeater-Builder] Battery terminal corrosion

2004-01-05 Thread Ken Arck
At 08:56 PM 1/5/2004 -0800, you wrote:
A 911 console that I maintain has developed some corrosion on the battery
terminals.
What is the best way to clean the terminals and what do I put on them to
keep this from happening again?

Go to your local auto supply store and pick up a battery terminal
brush - that's what they're made for. Most allow cleaning either top post
types or side terminals. When they're clean, coat 'em with good ol'
petroleum jelly. 

It's that simple!

Ken

--
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Re: [[Repeater-Builder] Repeater Help]

2004-01-06 Thread Ken Arck
At 04:23 PM 1/6/2004 -0600, you wrote:

You can best modify the spectrum by replacing the following components:
power supply, transmitter, receiver, controller.  It should then perform well
if you used good replacement parts.

-LOL!


--
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Re: [Repeater-Builder] Identify this antenna manufacturer

2004-01-08 Thread Ken Arck
At 12:44 PM 1/8/2004 -0500, you wrote:
Looks like a DB-201 that is missing the radial kit...  see attached PDF and 
tell me if you agree..

---I disagree. Aside from the fact there is no plate through which the
radiator extends (using that fast-becoming-infamous Hy-Gain style
insulator) and the fact the J part of radiator extends below that plate,
IMHO the antenna in question looks nothing like a ground plane...

Of course your mileage may vary

Ken
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Re: [Repeater-Builder] No TX audio

2004-01-14 Thread Ken Arck
At 12:03 PM 1/14/2004 -0500, you wrote:

 take 2 or 3 some 1n4001 to act as isolator so that one ptt does not
backfeed into the other.

A good idea overall but 1N4001's are a bit of an overkill (he
certainly shouldn't  need 1 amp capability for PTT)!

1N4148's should more than enough...

Ken
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Re: [Repeater-Builder] 75 to 50 ohm match

2004-01-20 Thread Ken Arck
At 04:06 PM 1/20/2004 -, you wrote:
I have a repeater attached to 300 feet of 75 ohm CATV hard line. I 
believe one can match using a length of 62.5 ohm coax, but how long 
and where to get it? 

---You don't use 62.5 ohm coax. You build a transformer (1/4 wavelength
or odd multiple of a 1/4 wavelength) out of conventional coax. Electical
1/4 wavelength of course, not physical :-)

On the other hand, some would argue the mismatch between 50 ohms and 75
ohms is hardly worth the effort and would simply return their duplexer to
match the different common port impedance. 

Ken
--
President and CTO - Arcom Communications
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Re: [Repeater-Builder] wavetek ct systems 3000b

2004-01-21 Thread Ken Arck
At 12:49 PM 1/21/2004 -0600, you wrote:
I have two Wavetek CT3000B service monitors.  One works OK, the
other has a problem in the scope.  I would like this fellow's
name to see what it would cost to bring one or both up to snuff.

---If anyone gets his contact info, I'd like it too. One of my level
switches slipped a notch, so it actually displays 1 more than it should
for a digit

Ken
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Re: [Repeater-Builder] wilson repeater

2004-01-28 Thread Ken Arck
At 03:17 AM 1/28/2004 -, you wrote:
have a wilson WU451 repeater can someone tell me the exciter output 
or possible have a manual?recieve is good cant get much out of the 
exciter

---I don't have the manuals anymore but the exciter makes around 2 watts.
There was a matching amp that would up that to 40...

Ken
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Re: [Repeater-Builder] Re: Dual Band Antenna's?

2004-01-28 Thread Ken Arck
At 12:23 AM 1/28/2004 -, you wrote:
them..  some dont.  I am running an X-500HNA at 160 feet for a low 
powered UHF repeater, and a packet station on VHF.  When the ice came 
through NC the past few days, the thing wouldn't have lasted over 20 
MPH if the wind blew.  

---FWIW, I ran an X-500 at the 10,023 foot level, on Mt. Haleakala on the
island of Maui for many years (it was for a digipeater) and it survived not
only 80+ MPH winds, it survived them with over an inch of ice on it. 

Yea I know.. Hawaii never gets snow or ice :-)

Ken
--
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Re: [Repeater-Builder] Tuffduck

2004-01-30 Thread Ken Arck
At 01:54 AM 1/30/2004 -0500, you wrote: 

 Hello all, Does any one have a URL, phone number or address for Tuff-duck?
Does any one know what the connector is on the Motorola GTX HT is called?
This is the RF connector for the duck.  very best of 73, Russ, W3CH
Trustee, W3PS

---Isn't that the tradename for Centurion antennas?

http://www.centurion.com/antenna.asp

Ken
--
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Re: [Repeater-Builder] RBI-1 Serial interface and FC-1

2004-02-05 Thread Ken Arck
At 04:10 PM 2/4/2004 -0500, you wrote: 
There has got to be more than just the FC-1 protocol that drives the RBI-1
such as remote high/low power, dc power on/off, etc. 


I hope you don't mind me answering here, as everyone can benefit from
information, yes? When driven by the ACC FC-1 format serial stream, you
do not get the fully functionality of the RBI-1 (I believe this is
mentioned in their manual.) You'd need to read that in detail to see
exactly what does and doesn't work when an RBI-1 is used with the FC-1 stream.

AH6LE uses the FC-1 for his serial converter to drive the Kenwood G707. 

Not exactlyg. My serial stream converter was designed to allow an
ACC controller (or similar controller that provides the ACC FC-1 protocol)
to control *some* of the functions in those Kenwood mobiles that allow
control via DTMF injected into the mic port. While the G707 is one of those
(as is the 732, V7A and some others), I didn't design the converter for any
particular radio. With it, you can program frequency, PL freq, xmt offset
and encode/decode select. And interjecting a shameless plug, our RC-210
will control these radios directly, without the need for an RBI-1 or any
other converter. I'll let someone else provide the info on the capabilities
of other controllers.

That is what I am trying to do with my SCOM-7k. It uses the Doug Hall RBI-1
serial stream. Is this public? I need to make it fully frequency agile, PL
agile, etc.

---All I can offer here is if you're not sure if the RBI-1 will control a
G707, why not simply contact Doug Hall directly and ask? Then again as
others have mentioned, maybe there's a way to use your 7K as it is. There
are lots of knowledgeable folks on this list.

Ken

--
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RE: [Repeater-Builder] RBI-1 Serial interface and FC-1

2004-02-05 Thread Ken Arck
At 09:13 PM 2/4/2004 -0500, you wrote:
I have been considering that for a while. I REALLY don't want to change
controllers because I like my 7k and the way the synthesized speech
sounds. If push comes to shove, I will do that. I also may use an RC-110
as an interface controller. 

---I'm not suggesting that. If you're happy with 7K, stick with it!

Ken
--
President and CTO - Arcom Communications
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Re: [Repeater-Builder] 6M duplexers using C02 bottles ?

2004-03-15 Thread Ken Arck
At 11:48 AM 3/15/2004 -, you wrote:
Has anyone ever considered using 8.5 diameter 6ft high carbon 
dioxide bottles as those used in fire smothering banks as 6M cavity 
filters ?

---Aren't those made of steel? It seems to me they wouldn't be very
temperature stable. Not to mention the usual electrical considerations
(conductivity, size, etc).

Ken
(thinking Anyone have a forklift to help me move my 500 pound duplexer?_
--
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[Repeater-Builder] ST-101 docs?

2004-03-18 Thread Ken Arck
Would anyone happen to have the paperwork on an old (damn old!) Selectone
ST-101 PL deck? Spence doesn't have anything that old from the aquisition:-)

Ken
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Re: [Repeater-Builder] ST-101 docs?

2004-03-19 Thread Ken Arck
At 01:54 PM 3/18/2004 -0800, you wrote:

  You did ask Spence?  

--Well not personally but I did talk to the folks at Com Spec about it.
They said that was too old a unit... BTW, I last saw Spence around the same
time, when I had my 2-way shop in Hawaii. 


  What are you trying to do with the Selectone ST-101? 

---I have one laying around that I thought I'd use in a link radio need I
have. The encode part was easy enough to get going but the decode side is
being less than cooperative :-).  I figured the paperwork might help...

Ken


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Re: [Repeater-Builder] Re: ST-101 docs?

2004-03-19 Thread Ken Arck
At 08:38 AM 3/19/2004 -0500, you wrote:
Hi Folks.I have the complete manual  on the ST-101 and am mailing it to
Ken Arck to-day.

--Thanks John, I appreciate the help!

Ken
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Re: [Repeater-Builder] Motorola Motrac Radio

2004-03-22 Thread Ken Arck
At 02:54 PM 3/22/2004 -0600, you wrote:
 The tube versions would end
with HHT, for example.  I think that the solid state
version would be a MHT or perhaps an LHT so that the
solid model would be something like U43MHT.

---Wow, it's been a number of years since I've dealt with this but as I
remember, the HHT was the earliest version of a Motrac but not the only one
in the series that had tubes in the xmtr. I believe ALL Motracs had at
least one tube in the xmtr, but used less of them in each later version. 

It wasn't until the Motran that the xmtrs went all solid state (crummy PNP
devices too!). Of course, I've been wrong before!

Ken
(has a photographic memory but lately I've been running low on film)






 
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Re: [Re: [Repeater-Builder] Motorola Motrac Radio]

2004-03-23 Thread Ken Arck
At 08:24 PM 3/22/2004 -0600, you wrote:

All models had 2 tubes in the PA deck, which were basically not visible.

---I remember the smelly heatsinks with the fingerstock and braid, yep!
But didn't the MHT have a squarish heat sink instead of the curvy,
contoured ones the earlier models had? Or am I thinking MST?

Ken
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Re: [Re: [Re: [Repeater-Builder] Motorola Motrac Radio]]

2004-03-23 Thread Ken Arck
At 08:29 PM 3/22/2004 -0600, you wrote:
The squarish one was the MST.

Danke

Ken
(Memorieslike the echo of my mind... la la la la)

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Re: [Re: [Repeater-Builder] Motorola Motrac Radio]

2004-03-23 Thread Ken Arck
At 05:25 AM 3/23/2004 -0800, you wrote:

This one has the three small transistorized finals on the right back side.

---Those transistors are part of the T supply (the high voltage
switching supply that supplies B+ to the tubes).

As far as numbers on the unit, don't find anything that meets the model
numbers that's been mentioned. 

On top of the front panel, there should be a plate with the model and
serial numbers. It should be right above the big, black connector on the edge.

 But let meask, when we talk tubes, are we referring to glass tubes, or the 
later solid state tubes they came out with.

---Solid state tubes? I think you're talking about the solid state diode
replacements (that physically looked like tubes) for tubes like the 5U4,
etc. The driver and final tubes in a Motrac were glass. You can see them by
loosening the four captive screws in the corner of the heatsink and
carefully sliding it off. 

It will all become obvious at that point :-)

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Re: [Repeater-Builder] Motorola Motrac Radio

2004-03-23 Thread Ken Arck
At 12:55 AM 3/23/2004 -0800, you wrote:

  Not really a good plan.  Most likely the radio won't duplex 
 without severe desense. 

---I had a full duplex LHT in my car, back in the 70's, complete with a
Princess phone conversion control head (remember those?).  It worked ok
but of course running a mobile full duplex is a whole different game than
one in repeater use!

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Re: [Re: [Repeater-Builder] Motorola Motrac Radio]

2004-03-23 Thread Ken Arck
At 08:18 AM 3/23/2004 -0800, you wrote:
The numbers that are on the three transistorized tubes are, if that is what
they are, is M9394. 

---What the heck is a transistorized tube?? Are they round and silver?

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Re: [Re: [Repeater-Builder] Motorola Motrac Radio]

2004-03-23 Thread Ken Arck
At 09:17 AM 3/23/2004 -0800, you wrote:
Just before the transistor, solid state tubes.  They are small and round.

---As I posted earlier, the only solid state tubes I can think of were
actually solid state diodes that were made as replacements for the older
vacuum tube rectifiers, such as the 5U4 series. I don't remember ever
seeing these type of replacements for tubes such as triodes, pentodes and
so on. Anyway, those M9394's are transistors (germanium as I recollect)
that are part of the high voltage power supply and aren't RF devices. 

But I suppose this is all moot - it would make a terrible repeater in any
case :-)

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Re: [Re: [Re: [Repeater-Builder] Motorola Motrac Radio]]

2004-03-23 Thread Ken Arck
At 10:34 AM 3/23/2004 -0800, you wrote:

  Ken, if you and John really don't remember those radios, I have a 
 few of them here, you are welcome to look and see for yourselves. 

---No thanks Neal. I am reminded of my age enough, in other ways :-)

Ken
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Re: [Re: [Repeater-Builder] Motorola Motrac Radio]

2004-03-23 Thread Ken Arck
It depends on whether they're NPN or PNP tubes..


At 02:06 PM 3/23/2004 -0800, you wrote:

  How much warm up time do they need? 

Ken Arck wrote:
 
 At 08:18 AM 3/23/2004 -0800, you wrote:
 The numbers that are on the three transistorized tubes are, if 
 that is what they are, is M9394.
 
 ---What the heck is a transistorized tube?? Are they round and 
 silver?
 
 Ken

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Re: [Re: [Repeater-Builder] Motorola Motrac Radio]

2004-03-24 Thread Ken Arck
At 04:53 PM 3/23/2004 -0800, you wrote:
Ken
I think you have been around as long as I (40+ years in electronics). 

---Yes Tom. I have been around long enough to remember when Sue was a
noun and the Left was a direction you headed :-)

Thanks for update on Transtubes! 

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Re: [Repeater-Builder] Re: Motrac / Solid State Tubes

2004-03-24 Thread Ken Arck
At 01:53 AM 3/24/2004 -, you wrote:
These were used in VHF applications.  [e.g. 6CW4] They
are metal and don't look all that different from early transistors. 
The size is similar also, the Nuvistor is 0.400 dia. and a TO-5 is
0.335 diameter.

---Nuvistors were noticeable taller, not to mention the two metal tabs
that extended below the base. Of course, they also got hot!

But you make a good point. I dunno.. maybe it's time to put this thread to
bed?

Ken
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Re: [Repeater-Builder] WTB: 440 Mhz Receiver with COR

2004-03-28 Thread Ken Arck
At 03:45 PM 3/28/2004 -0800, you wrote:
Just something with good sensitivity and the cor.  It's really a low key
repeater.

--I have a Spectra Tac receiver (that's a receiver from a Micor),
mid-split with channel element and squelch gate card. It's in a rack mount
and all you need do is supply it 9.6 and 13.8 volts. It doesn't have an
audio/squelch board but with the squelch gate card, you don't need that
anyway. 

Make offer :-)

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Re: [Repeater-Builder] WTB: 440 Mhz Receiver with COR

2004-03-30 Thread Ken Arck
At 06:10 AM 3/30/2004 -0800, you wrote:
The receiver that is on the 440 machine is a Uniden
radio, for which we pulled the de-emphasized audio from.  Then we used a
COR, which actually is nothing more than a voltage drop.

---Well Mathew. It doesn't sound like you need a new receiver. That would
be like throwing the baby out with the bathwater, no?

It sounds like all you need to do is to get a decent COS signal from the
Uniden you're using. That shouldn't be a huge deal. What are the levels
you're seeing from the current tap point? It shouldn't take more than a
couple of resistors and a transistor to get a clean source.

Ken
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Re: [Repeater-Builder] WTB: 440 Mhz Receiver with COR

2004-03-30 Thread Ken Arck
At 09:07 AM 3/30/2004 -0800, you wrote:
The voltage at the tap point is about 7 volts, when keyed it drops to about
.5 volts, just not enough to get it to key the controller.  I looked for
other sources in the radio, nothing would drop to zero volts.

---I'm surprised your controller doesn't recognize .5 volts as a logic
low. Actually the chances of finding a point in the receiver that drops to
exactly zero is pretty slim, as a bipolar transistor which is full
saturated, will still have a .6 volt drop across it. 

What you could try is a pull down resistor (from the COS wire connected to
the controller to ground) and see if you can pull the low level down enough
for the controller to recognize. You might start with a 10K and work your
way down. Of course if the squelch in the radio stops working, you've
probably gone too low a value :-)

Ken
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Re: [Repeater-Builder] WTB: 440 Mhz Receiver with COR

2004-03-31 Thread Ken Arck
At 08:15 PM 3/30/2004 -0500, you wrote:
Put a diode in series, .7 volts drop,remember?

---If in series yes. But since that diode would be in series with (more
than likely) a bipolar transistor C-E junction with its emitter to ground,
that would add another .6 volts to the equation. Therefore he'd be looking
at a total of 1.2 volts ABOVE ground and it would simply make the problem
worse.

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Re: [Repeater-Builder] Re: cor logic circuit thoughts

2004-04-01 Thread Ken Arck
At 12:24 PM 3/31/2004 -, you wrote:
Any ideas where I might find a cheap version of this circuit or basic 
kit to build one?

---I did a syllabic squelch for an HF remote base project a few years. It
is quite easy to build on some perfboard and it works quite well:

http://www.ah6le.net/hf_squelch.html

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Re: [Repeater-Builder] icom ic-u-400 as a repeater???

2004-03-31 Thread Ken Arck
At 11:01 PM 3/30/2004 EST, you wrote: 

does anyone know if its possible to make a icom commercial 400 mhz mobile.
ic-u400 into a repeater?? thanks dave kb2znc 

I seriously doubt it. The scheme the U400 uses in its synthesizer
makes it impractical.

Ken 

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Re: [Repeater-Builder] This is serious, yeah right!

2004-04-09 Thread Ken Arck

http://www.tearingdownstrongholds.com/ 

---Obviously a Kerry supporter :-)

Ken








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Re: [Repeater-Builder] Fan audio

2004-04-09 Thread Ken Arck
At 02:22 PM 4/9/2004 -0400, you wrote:

Either run AC fans or use a different power supply than the one running 
your repeater to power those DC ones

---I'm running two 12 Vdc fans in my Micor repeater. I use a 200 uh choke
in each lead (+  -) and a 1000 mf cap across them, on the supply side. I
then use a transistor to control 'em and I have absolutely no noise
whatsoever using this scheme. 

I suspect part of the problem is that most people forget to treat both
supply lines and noise gets introduced due to ground loops and stray currents.

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Re: [Repeater-Builder] Infomation Needed

2004-04-13 Thread Ken Arck
At 04:07 PM 4/13/2004 -, you wrote:
I have a Micor or Mitrek Repeater or what i think is a repeater.Here 
the Model number can anyone tell me what it is

Model Number C73RTB/3103CM

---Let's see how good my memory is... It's a Micor VHF, 110 watt, PL'd
(not DPL) base station.

I'm sure I'll be corrected if I'm too far off :-)

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Re: [Repeater-Builder] Re: Infomation Needed

2004-04-13 Thread Ken Arck
At 04:48 PM 4/13/2004 -, you wrote:

Also is this a repeater or can it be converted to a repeater ?

---It is a base station but can easily be converted to a repeater. See
http://www.repeater-builder.com/rbtip/micor-index.html

What is a Micor PL'D DPL ?

---Micor is the model series of the radio. PL refers to Motorola's
trademark name for CTCSS (Continuous Tone Coded Squelch System). DPL
refers to Motorola's trademark name for Digital Private Line.

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RE: [Repeater-Builder] TKR-850 - Where to get CTCSS enable signal?

2004-04-14 Thread Ken Arck
At 02:29 PM 4/14/2004 -0500, you wrote:
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).

---Is there a programming option that would give him a discrete PL decode
logic output, independent of COS? That is what he needs.

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Re: [Repeater-Builder] Motorola Mitrek T83JJA3900DK

2004-04-17 Thread Ken Arck
At 10:15 PM 4/16/2004 -, you wrote:
Motorola Mitrek T83JJA3900DK, Can this radio be programed to work as 
a repeater ?

---Yep, quite easily.. see:

http://www.repeater-builder.com/rbtip/mitrek-index.html

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Re: [Repeater-Builder] Need help in layout

2004-04-17 Thread Ken Arck
At 12:41 AM 4/17/2004 -, you wrote:

I want it to latch and toggle the output to a 12V relay.  So when I 
key the portable with that PL it will close and when I key it the second
time 
it will open.

---Cheap and easy control, eh? :-)
Without knowing exactly what you're up to, the fastest way to do it is
probably with a D-type flip flop. If you don't know what this is, it is
probably beyond the scope of this list

Ken

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Re: [Repeater-Builder] Min Separation for VHF, no duplexer, 2 ants?

2004-04-17 Thread Ken Arck
At 03:31 PM 4/17/2004 -0400, you wrote:

100 feet vertical or 300 feet horizontal separation.

100 feet of frequency of separation? Hmmm, my service monitor isn't
calibrated in feet!

(sorry, couldn't resist)

Ken


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RE: [Repeater-Builder] Is there a relationship between 147.225 and 146.925?

2004-04-18 Thread Ken Arck
At 02:12 PM 4/18/2004 -0400, you wrote:

Subject: [Repeater-Builder] Is there a relationship between 147.225 and
146.925?

---Are these standard split repeaters? Assuming so, the 147.225 repeater
(output?) places the input at 147.825

How about clarifying the input freqs for these repeaters?

Ken




 
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Re: [Repeater-Builder] Is there a relationship between 147.225 and 146.925?

2004-04-18 Thread Ken Arck
At 02:22 PM 4/18/2004 -0400, you wrote:
The difference in frequency between the two transmitters is 300 
kilohertz.  300 kilohertz is exactly 1/2 of the separation of either 
machine;  600 kc.

Nice catch :-)


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Re: [Repeater-Builder] Is there a relationship between 147.225 and 146.925?

2004-04-18 Thread Ken Arck
At 02:38 PM 4/18/2004 -0400, you wrote:
Hmmm.  Your transmitters are 300 KHz apart.  Your duplex split is 600 
KHz.  Sounds suspicious to me.

Not to mention there are all sorts of odd order mixes with his freqs:


Third Order Results: 
147.2250 MHz +  147.2250 MHz -  146.9250 MHz  147.9250 MHz 400.00 KHz 
147.2250 MHz -  146.9250 MHz -  146.9250 MHz  146.3250 MHz 300.00 KHz 

Fifth Order Results: 
147.2250 MHz +  147.2250 MHz +  147.2250 MHz -  147.2250 MHz -  146.9250
MHz  147.9250 MHz 400.00 KHz 
147.2250 MHz +  147.2250 MHz +  147.2250 MHz -  146.9250 MHz -  146.9250
MHz  147.9250 MHz 100.00 KHz 
147.2250 MHz +  147.2250 MHz -  147.2250 MHz -  146.9250 MHz -  146.9250
MHz  146.3250 MHz 300.00 KHz 
147.2250 MHz +  147.2250 MHz +  146.9250 MHz -  146.9250 MHz -  146.9250
MHz  147.9250 MHz 400.00 KHz 
147.2250 MHz +  147.2250 MHz -  146.9250 MHz -  146.9250 MHz -  146.9250
MHz  146.3250 MHz 0.00 KHz 
147.2250 MHz +  146.9250 MHz -  146.9250 MHz -  146.9250 MHz -  146.9250
MHz  146.3250 MHz 300.00 KHz 



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Re: [Repeater-Builder] Is there a relationship between 147.225 and 146.925?

2004-04-18 Thread Ken Arck
At 11:46 AM 4/18/2004 -0700, you wrote:
Not to mention there are all sorts of odd order mixes with his freqs:

---you guys considered adding circulators to your transmitters? That would
solve the mixing issues..

Ken




 
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Re: [Repeater-Builder] Re: Is there a relationship between 147.225 and 146.925?

2004-04-19 Thread Ken Arck
At 07:45 PM 4/18/2004 -0400, you wrote:

To be honest, I didn't follow Ken's math. Must be that west coast
version. ;- Here is how I add it up:


Aside from the formatting changes due to email, that's what my
intermod software came up with.

(sure sure,  shoot the messenger!)

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Re: [Repeater-Builder] Duty Cycle

2004-04-20 Thread Ken Arck
At 11:18 PM 4/19/2004 -, you wrote:
Transmitter and amplifier manufacturers usually specifies a duty 
cycle (i.e. 50W 100% duty cycle) on their product. then how do you 
prove what they specified is correct? 

---Doesn't it suck they don't give you the complete picture? Duty cycle is
generally related to transistor junction temperature rise over a given
period of time. I guess you could always look up the transistor spec's and
see what they spec as a safe junction temperature. 

Of course you could always ask the manufacturer if they guarantee that duty
cycle..

Ken
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Re: [Repeater-Builder] Re: Receiver Sensitivity

2004-04-20 Thread Ken Arck
At 11:41 PM 4/19/2004 -, you wrote:
Many of the newer commercial and older low dollar 
repeater receivers crap-out on busy mountain tops
and repeater sites, especially when you park a 
gasfet mixer (preamp) in front.

---Now you know why I insist on using only Chip's stuff :-)

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Re: [Repeater-Builder] VHF Engineering Repeater

2004-04-22 Thread Ken Arck
At 11:49 PM 4/21/2004 -, you wrote:
Having trouble with the receiver being to low ,so without the proper 
test equipment available to me ,I'm going to tune this the old 
fashion way .   With an HT  in the field by ear . My problem is I 
don't know which board is the main board for tuning the receive. I'm 
thinking its the  FM 455. Question  is there anyone in this group 
familiar with this receiver  and tune up procedures ? VHF Engineering 
Repeater 

--Well, since you're stuck with the thing... the FM455 is the IF board.
The RF144 is the front end/1st local oscillator and 1st mixer board. 

If by too low you mean it's off frequency, it should be obvious which
board contains the channel xtal and its associated trimmer cap, no?

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Re: [Repeater-Builder] Suggestions as to IFR Monitor Repairs ?

2004-04-25 Thread Ken Arck
At 12:22 PM 4/25/2004 -0700, you wrote:

  Hi Ken, I wonder if Fluke now does repair / certification of the 
 service monitors? 

---I talked to them about a month ago, regarding a replacement lever
switch on my service monitor. While I didn't specifically ask about repairs
and/or calibration, they do have parts. I guess it would be worth calling
them about the other issues. 

As I remember, they were in Texas?

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Re: [Repeater-Builder] Duplexer Alignment

2004-04-27 Thread Ken Arck
At 07:40 PM 4/27/2004 -, you wrote:
Is there any methods of tuning a set of duplexer without having a 
Spectrum analyzer.  I am in the learning stages again.  I have an 
IFR-500a, so I can generate a signal into them.  I know this would 
work somewhat for the receive, but what does one do for the 
transmit.  

---Why wouldn't it work for transmit? As a matter of fact, it would work
just fine by both the receive AND transmit sides of the duplexer. RF is RF,
regardless if its -100 Dbm or +10 Dbm, right?

Depending on what kind of duplexer is it (BP/BR or just BR) determines the
tuning procedure. You might want to check the website to see if yours is
listed. One thing though -  It's a good idea to use a 3 db pad on the
receiver you're using for tuning, since you have no guarantee it will
present a 50 ohm load to the duplexer. 

Oh, and don't forget to make sure a 50 ohm load is on the duplexer  port
not currently being tuned as well (a 3 db pad would work here as well).

Ken
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Re: [Repeater-Builder] Duplexer Alignment

2004-04-27 Thread Ken Arck

At 02:54 PM 4/27/2004 -0500, you wrote:
The duplexers are a set of TX/RX duplexers, six of them.  When you say a 3db
pad, that is something that I am not sure of, is this basically the same
thing as a db pad used in CATV systems?  

---Yes they are the same CONCEPT, but CATV ones would be 72 (75?) ohm.
You, of course, need 50 ohm ones. The idea behind using them is to present
an accurate 50 ohm load on the duplexer ports, because a change of load
affects the tuning. If you don't have any, I'd suggest begging or borrowing
some from a buddy :-)


All I know is that the duplexers were set up as a Varinotch filter system.

---If I'm not mistaken, that's a notch type duplexer. Aside from visiting
TX/RX's website (to see if you can locate tuning instructions), you might
want to check out this link as well:

http://www.repeater-builder.com/rbtip/notchduptuning.html

Ken
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Re: [Repeater-Builder] Help on Interference

2004-04-28 Thread Ken Arck
At 10:36 PM 4/27/2004 -0400, you wrote:
This is the reason I suggest just adding a helical to the front end of
the regency,

There is nothing magical about helical resonators - John Phillip Sousa

Ken
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Re: [Repeater-Builder] Off topic, but worth the bandwidth... Fwd: SERIOUS - Trojan Alert

2004-04-29 Thread Ken Arck
At 04:48 PM 4/28/2004 -0700, you wrote:
A persistent new spam campaign that purports to show recipients
pictures of Osama bin Laden being captured is in fact a ruse that
could lead victims to download a malicious Trojan Horse program.


---Yep Mike, this one is valid. My spam filter AND virus scanner caught
it. Of course the giveaway - even without the anti-virus app - is that a
graphic isn't a .pif file!

Ken
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Re: [Repeater-Builder] Tower Duplexer

2004-04-30 Thread Ken Arck
At 12:38 AM 4/30/2004 -, you wrote:

  I have the opportunity to install a DB-224 and a DB-420 on a 500' 
tower. But the funds are lacking for two runs of hardline. With 60 
watts on the 2 meter repeater and 40 watts on the 70cm repeater. What 
kind of Duplexers can I use on this system for one run of hardline?
I'm talking dependable.

---One of my UHF repeater antennas is up a 167' tower, with hardline
running up there. I also have a 2 meter antenna for my remote base up the
tower too. The same hardline is used for both bands and it works just fine.
Although it is kinda strange watching the wattmeter go from 70 watts with
just the repeater talking,  to over 100 when the remote transmits :-)

Just get one that can handle the combined power, since both repeaters will
transmit at the same time. I think I used a pair of Comets for my
installation, rated at 250. I figured that was conservative enough and so
far, no problems.

Truth be told, I doubt there is much difference between the different
brands anyway. A couple of low-Q bandpass filters ain't exactly rocket
science :-)

Ken
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[Repeater-Builder] T1504 cavity

2004-05-02 Thread Ken Arck
Hi kids

I'm tuning up a T1504A, which has the 430 - 470 cable set on it. Everything
looks good, except for one cavity - one of the lowpass/hi reject ones. I
can't seem to get a very good null on it, regardless of the loop position.
As a matter of fact, the reject seems to be getting better when it runs
up against the outside edge of the adjustment slot. But I never find a
definate point. The other 3 cavities are great - a nice, sharp, deep null,
just about centered in the slot.

Anyone have any ideas what I should be looking for?

Ken
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Re: [Repeater-Builder] T1504 cavity

2004-05-02 Thread Ken Arck
At 08:22 PM 5/1/2004 -0400, you wrote:
Ken,

Having refurbished and tuned a number of those cavities, I 
would suspect it may not be getting a good low resistance 
contact between the end of the coupling loop and the inside 
of the cavity.

---Thanks Paul but I have already looked at the interior. Very clean with
little signs of oxidation. The area around the end of the coupling loop is
clean and looks good.

Ken
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Re: [Repeater-Builder] T1504 cavity

2004-05-02 Thread Ken Arck
At 08:50 PM 5/1/2004 -0400, you wrote:
I would guess you verified the 'rough' adjustment to be in the same 
position as the other three?

---It's nowhere near where the others are. Same coupling loops, oriented
the same way as the other lowpass/hi reject too. The internals looks fine
and clean. Pass loss is the same (but I haven't run bandpass measurements
yet). 

Even by itself, this one cavity behaves this way..

Ken
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Re: [Repeater-Builder] T1504 cavity

2004-05-02 Thread Ken Arck
At 07:09 PM 5/1/2004 -0700, you wrote:
Do you already have the loop moved to the 2nd hole which allows for more
adjustment.  Just thought I would ask.

---Haven't tried that yet but the other lowpass cavity (the one that
appears to be ok)  has the coupling loop in the same hole.

Ken
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Re: [Repeater-Builder] T1504 cavity

2004-05-02 Thread Ken Arck
At 01:02 AM 5/2/2004 -0400, you wrote:

Have you swapped the loops/probes from the problem can with the ones in
another can to see if it's a problem with the can itself or with the
loop/probe elements? Swapped any cables?

---Yea, I've had good luck with 1504s before too (this isn't my first set
of Batwing cavities by any means). 

I had an extra cavity around and installed the coupling loops from the bad
cavity into it, with the same results. Maybe it is the loops but I'll try
the ones from a good cavity to see if that makes a difference. As for
cables, yes. I've tried some others. But as I said, I also tried the bad
cavity standalone with the same results, so I'm reasonably sure it's not
cable related. 

No problem on the manual, I have several :-)

Ken

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[Repeater-Builder] T1504 cavity [solved!]

2004-05-02 Thread Ken Arck
When I pulled the coupling loop assembly from the bad cavity, it looked
fine to me. Although I noticed the connection to the S0239 had apparently
been resoldered at some point in the past on the adjusted one). I didn't
think about the resoldering job too much. Until this morning that is, when
I pulled a coupling loop from the good cavity.

There was significantly LESS solder on the good one. Hmmm, could this be an
issue? On the bad one, there was so much solder that the solder fillet
actually shorted almost 1/4 inch of the loop. Voila! I bet this changed the
resonant frequency of this coupling loop. I removed all the excess solder,
and used just enough for a good electrical and mechanical joint. 

It is now working just fine! The notch is pretty much centered in the
adjustment slot and is deep and sharp.

Thanks to everyone who offered their assistance, I really appreciate it.
Perhaps my experience will benefit someone down the road!

Ken
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RE: [Repeater-Builder] 2m repeater IMD issue

2004-05-05 Thread Ken Arck
At 10:35 AM 5/5/2004 -0400, you wrote:
Well, I considered that too.  However, after further study of isolators (and
discussing my situation with a manufacturer of isolators) I discovered that
a VHF isolator will not stop signals in the 800MHz range from passing
through it.  An isolator should work great if I was dealing with several VHF
transmitters at the same level on the tower.

---What bothers me here about using a circulator is that you say it only
occurs when your TX is active. This doesn't sound like IM to me, as that
would occur regardless of whether the tx was active or not (IM is produced
when external RF comes down the TX line and mixes in the PA stages. This
does NOT require that the PA actually be making power). 

It sounds more like a classic case of mixing. Have you run all the freqs
involved to see where the possibles might be?

Ken
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RE: [Repeater-Builder] 2m repeater IMD issue

2004-05-05 Thread Ken Arck
At 11:52 AM 5/5/2004 -0500, you wrote:
Duplexers with one loop in UHF do not do much at 800 Mhz -

---He was talking about VHF circulators not being effective at preventing
800 Mhz energy from passing back down the TX line?

I've never heard of this before.

Ken
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RE: [Repeater-Builder] Re: 2m repeater IMD issue

2004-05-05 Thread Ken Arck
At 12:43 PM 5/5/2004 -0400, you wrote:

However, the isolator will not keep 800MHz signals from getting to the
transmitter of the 2m repeater. 

???

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RE: [Repeater-Builder] 2m repeater IMD issue

2004-05-05 Thread Ken Arck
At 12:34 PM 5/5/2004 -0500, you wrote:
Take a tracking generator and sweep a Wacom 678 duplexer and look beyond
440 / 450 on up to 600 and beyond.  If memory is correct a single cavity
will have less than 10 db attenuation at 800.

---I said CIRCULATOR, not DUPLEXER :-)

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Re: [Repeater-Builder] Equipment question

2004-05-07 Thread Ken Arck
At 12:48 PM 5/7/2004 -0400, you wrote:
Hey gang.
OK, need some info from you old timers who are Dayton regulars.
Any good reputable booths I should visit as far as commercial stuff
goes?

---Of course, Kevin and Scott will be there. Spaces 707 - 710

Ken
--
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Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
Be sure to see our products at this year's Dayton Hamvention!
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AH6LE/R - IRLP Node 3000
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Re: [Repeater-Builder] Re: Dayton Specials

2004-05-08 Thread Ken Arck
At 06:01 PM 5/7/2004 -0400, you wrote:
RE: Arcom Products at Dayton 2004

---Hey Kevin. Your ISP hates me! Could you give me a call please?

Ken
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Re: [Repeater-Builder] RC 210 / 220 radio for remote ideas?

2004-05-08 Thread Ken Arck
At 11:59 AM 5/8/2004 -0700, you wrote:

Ken - the designer of the 210 - is a regular on this group.  I'd just wait
a couple of days until he gets back from Dayton and ask him.

---Actually, I am here :-) Now to the question at hand

It was queried:

I need ideas to make a 220 freq agile (or at least work the channels on
it) with the RC210 or Ideas on how to use the RC100 to control the IC3AT and 
use the RC210 as the main controller.

---As Stephen pointed out, you could connect the RC100 to an unused port
on the RC210 and then program some 210's DTMF memories to send them out to
the RC100, which would then actually control the 3AT. However, I have a
simpler method. 

Simply turn off DTMF muting on the RC210 port you use to connect to the
RC100. This way, any DTMF entered into another linked port of the 210 will
simply be passed out the port to which the RC100 is connected. Make sense?

While I realize you'd prefer not to have to use the RC100 as an
intermediary, the 210 will not directly support the 3AT, sorry.

Ken







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Re: [Repeater-Builder] Re: RC 210 / 220 radio for remote ideas?

2004-05-08 Thread Ken Arck
At 08:08 PM 5/8/2004 -, you wrote:
Can you not tell the RC210 to send out a line of dtmf's?  Set this 
up in a macro?  

---Yep, you sure can. The 210 has 20 DTMF memories, each of which can
store 10  digits. Each memory can be called from a Command Macro.

I'm not familiar with the sequence of events that need to take place when
you send a command to the RC100 in order to do what you want but it doesn't
accept some DTMF digit as a command terminator, to force command
execution (as in the case of a 'stuck' COS)?

Currently in an RC210 Command Macro, there is no way to actually drop the
PTT line on a port.

Ken


That way you could have channels that the IC3AT 
would just dial up to.  I also wonder in the same macro if you could 
get it to pause or drop the tx then re-key and send another 
string of dtmf's?  I haven't played with it yet...but I change the 
dip switches on the ts32 (for the 3at) with the CS-1688.  Not sure 
yet if it couldn't be incoorperated in to the one line of dtmf's yet 
or not.  If that would workthat would be cool :-)
Thanks and 73,
Robert






 
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Re: [Repeater-Builder] Re: Error

2004-05-10 Thread Ken Arck
At 11:37 AM 5/10/2004 -0600, you wrote:

For further details see the attachment.

---Personally I think anyone who's connected to the internet should be
required BY LAW to have a valid virus scanner with all the current updates. 

If they don't, they should be shot




 
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Re: [Repeater-Builder] Micor Key

2004-05-11 Thread Ken Arck
At 07:22 PM 5/11/2004 -, you wrote:
Does anyone have a spare motorola micro/synto key lying around they 
could spare.  I have four of these radios and cannot open them as no 
one sent me a key.  Thanks.

---They're a standard Motorola 2135. Give Ted a try:

http://www.mdmradio.com/

Ken
--
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Makers of state-of-the-art repeater controllers and accessories.
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Re: [Repeater-Builder] CW ID Indicators

2004-05-11 Thread Ken Arck

H... A H 6 L E / W R

(gotta love it!)

KEn


At 04:48 PM 5/11/2004 -0400, you wrote:
Well, how 'bout a short history lesson?
Back around '76 or '77, the rules for repeaters changed drastically. 
Prior to that, repeaters required a separate repeater license, which 
required a vey lengthy application. The last few years of that repeaters 
were issued WR callsigns, before that they were either the trustees call 
or a club call. Then when it all changed, any ham with a tech or above 
could put up a repeater at any time with no special license, just the 
requirement that it ID with either /R or /RPT in morse, or the word 
'repeater' in voice. Auxiliary links had to use /A or /AUX, or the word 
'auxiliary'.
This rule is a carry over from that, to allow the use of those suffixes 
if desired.

-- 
Jim Barbour
WD8CHL


Matt wrote:
 Here is a good one.  
 
 I know Kevin doesnt like FCC legal battles, but I felt this was worth 
 a
 quick laugh, Anyway...
 
 According to 97.119(c)
 
 One or more indicators may be included with the call sign. Each 
 indicator must be separated from the call sign by the slant mark (/) 
 or 
 by any suitable word that denotes the slant mark. If an indicator is 
 self-assigned, it must be included before, after, or both before and 
 after, the call sign. No self-assigned indicator may conflict with 
 any 
 other indicator specified by the FCC Rules or with any prefix 
 assigned 
 to another country.
 
 But here is the kicker, no where in the rules does it say what the
 official indicators are.  except a blurb about /KT, /AG, and /AE if 
 you
 are waiting for a new callsign and just passed the exam for the next
 class.
 
 I know we use /R for a repeater and /A for an auxiliary station but 
 what
 are the rest?
 
 It's pretty sad when not even the FCC's employees can give you a solid
 interpretation of the rules. After spending 30 minutes on the phone
 with a FCC operator she could not give me a solid answer either.  She
 gave me a reference to 54 FR 25857 but after searching for hours that
 is just the entry in the federal registar where the changes are made 
 to
 the FCC rules.
 





 
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Re: [Repeater-Builder] CW ID Indicators

2004-05-11 Thread Ken Arck
At 05:02 PM 5/11/2004 -0400, you wrote:
heh-well that wasn't quite what I meant, but;c}
really it was special callsigns with a WR prefix. The club's repeater I 
belong to here started as WA8TTO, then WB8CRP, then WR8ADV before the 
rules changed.

---Oh I remember that (I owned WR6AKB in the 70's). I also remember the
mountain of paperwork, etc, etc, etc. 


Ken
(an old fart, but at least not older than Neal!)

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Re: [Repeater-Builder] CW ID Indicators

2004-05-12 Thread Ken Arck
At 05:34 PM 5/11/2004 -0400, you wrote:
That may be a throwback to the old FCC interim designators. For example,
if you upgraded at the Buffalo (NY) FCC office, your call was W3ABC/BF.
We used to say Interim BullFrog.

---Well the heck with all that. I'm just going to problem everything to
AH6LE / GOD.

Ken
(Get's 'em every time)
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Re: [Repeater-Builder] CW ID Indicators

2004-05-12 Thread Ken Arck
At 06:16 PM 5/11/2004 -0700, you wrote:
---Well the heck with all that. I'm just going to problem everything to
AH6LE / GOD.

---I suppose I better check for typos before I program anythingsigh

Ken
--
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Re: [Repeater-Builder] Re: Response: Nick Berg

2004-05-14 Thread Ken Arck
I am probably one of the more involved political wonks around and have
great interest in what goes on politically and the War on Terror.

And while I have nothing but the deepest sympathy for Nick Berg and his
family,  does this thread really belong on a mail list dealing with repeaters?

Ken 
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Re: [Repeater-Builder] GLB preamp

2004-05-18 Thread Ken Arck
At 03:39 PM 5/17/2004 -, you wrote:
Hi 
 I purchased a used GLB preamp for 70cm at Dayton. I am looking for 
the company that made it. Does anyone know where and how I can find 
them?

---GLB (Gil L. Brock?) hasn't existed for many years. Gil's stuff was
pretty popular during the 70's (and part of the 80's) - his GLB Synthesizer
was probably one of his more popular products but he did make some preamps
and other goodies for a while too. I believe he got out of the biz quite a
while ago. And if I'm not wrong, I believe I heard he passed away?

What info about the preamp are you looking for?

Ken
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Re: [Repeater-Builder] Remote Base Project

2004-05-22 Thread Ken Arck
At 09:15 PM 5/21/2004 -0500, you wrote:

Would there be any advantage to putting the radio in an RF box for
shielding?

---The short answer? Only if you put the antenna(s) in a shielded box too. 

You're asking too much of physics by trying to run a remote base on the
same band as your repeater :-)

Ken

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Re: [Repeater-Builder] Remote Base Project

2004-05-22 Thread Ken Arck
At 01:09 PM 5/22/2004 -0400, you wrote:
Why? I've done it for about 15 years. I can't use it within about 60 kHz
of the local repeater, but otherwise it's fine. I just used a cavity to
notch out the repeater TX. The loss of sensitivity near the repeater TX
frequency is overcome by the strength of the repeaters at the site.

--I think you guys are missing the point. His problem is the remote base
xmtr is taking out the repeater receiver, not the other way around. 

While you're correct about probably being able to tighten up things, if
he's going to run any power on the remote TX and it is frequency agile, he
has some issues.

Note he did not say he is running an inband LINK - he said an RBI-1 with a
Kenwood mobile REMOTE BASE. Hence the strong inferrence to wanting to be
able to move the Kenwood radio around, frequency wise.

Did I miss something?

Ken
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Re: [Repeater-Builder] Antenna Thoughts

2004-05-25 Thread Ken Arck
In Hawaii, we did something similar. Our UHF repeater was at the 10,023
foot level (Mt. Haleakala, on Maui). We wanted coverage on the north shore
of the Big Island (Hawaii) and good coverage on the major parts of Maui. As
such, we had one 5 element yagi facing south and one facing north, but
downtilted towards most of Maui (while Haleakala is quite high, the summit
is only 8 miles or so line-of-sight to the major portions of Maui. Hence
the downtilt). They were fed through a 2 port power divider.

The setup worked quite well but bear in mind two factors:

1) Receive power is only half of what you'd have on a single antenna (power
splitter reciprosity, right?)

2) Aperture gain is less using this method, versus 10' worth of vertical
stick.

Ken

At 01:27 AM 5/25/2004 -, you wrote:
I have a crazy thought, but I want to get some opinions.  Here is 
what I am thinking, only becuase I can construct them very cheaply.  
As opposed to using a verticle, what would I expect if I used 4 10 
element verticle beams, one point to NWSE, coupled with a power 
divider.  My objective in this thought is to foward the gain to the 
areas that are of most interest.  I am sure that I will see a few 
dead areas, but should be minimal.  Has anyone had any expierience 
with this.  This is for a 2 meter repeater, antennas will be up 
about 100 feet.  Fed with 7'8 hardline.  Thanks.

Mathew






 
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Re: [Repeater-Builder] Antenna Thoughts

2004-05-25 Thread Ken Arck
At 08:47 PM 5/24/2004 -0500, you wrote:

But would not the gain of these antenna's compensate for that, from say a 3
DB to 6 DB gain verticle to a 13 DB foward gain, directed in each direction.

---It's not really that big a deal. I'm sure it will work fine as you
describe. The only caveat I have is make sure that many elements doesn't
restrict your beamwidth too much. It may be too directional, depending on
distance

Ken
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RE: [Repeater-Builder] FBI Release: Suspect Photos- REQUEST Assistance

2004-05-26 Thread Ken Arck
At 04:13 PM 5/26/2004 -0500, you wrote:

Well you and Many Others including Me Have also questioned this , They want 
us to Listen But Wait a Minute Cell Phones , Cordless and many other Forms 
of Communications are a Federal offense to Monitor, Nothing Changed.

---Remember back in 1997 when a couple in Florida taped an intercepted
cell phone conversation of Newt Gingrich and then turned that tape over to
a Congressman? Obviously this was blatently illegal, yet nothing ever came
of it.

All things considered, I can live with what's being asked


Ken 
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Re: [Repeater-Builder] Desense

2004-06-02 Thread Ken Arck
At 06:26 PM 6/1/2004 -0500, you wrote:
Then tie that into My 440 repeater that I rebroadcast the NWS  and Amber 
Alert Warnings . well the Testing I have done  The Two Watts . De sensed 
the Weather receiver so bad  It distorts the signal which is a strong one 
on a homemade outside ant at 20 Ft.  151.82 is also a homemade ant at 30 
Ft. opposite side of QTH.


---Well you know what they say about the best desense is a good offense!

As crummy as cheap WX receivers seem to be, it seems hard to believe that 2
watts, 20 feet away from a radio that is more than 10 megs away, is the
culprit.

Are you sure it's not a case of the 2 watt radio being in close enough
proximity to the WX radio itself so as to simply be blocking it? Ya know..
plastic case and all?

Ken
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Re: [Repeater-Builder] buillding a repeater

2004-06-02 Thread Ken Arck
The other comments regarding the control line is a good one but allow me to
pass on an experience I had in converting a mid-split UHF Micor station
(C64RCB) to the ham band. Specifically, it needed to be moved *exactly* 10
Mhz down (it was on 451.875/456/875 and I was moving it to
441.875/446.875). Pure coincidence but there you go...

The receiver was no sweat - it tuned to 446 painlessly. The transmitter was
another story, perhaps because it was being moved so low. What I found was
that the exciter was no biggie, as it tuned down easily enough (although I
did parallel a 1 pf cap across 2 or 3 coils to center them in their range a
bit better than they would without the new caps). Of course, the exciter
makes power on VHF and is later tripled. But you can hear it just fine for
quite a distance on its ultimate UHF channel. 

I followed the directions on the repeater builder webpage regarding tuning
the SECOND bandpass assembly and the circulator but still couldn't get
*any* power out of the PA. What I found I needed to also do was retune the
FIRST bandpass filter assembly - the one between the exciter and the
tripler stages. Once I did that, there was no problem at all in the xmtr
making power.

FWIW

Ken


At 09:34 AM 6/2/2004 -0400, you wrote:
I have a problem. I have a micor base/repeater and over the weekend I tuned
it up to my frequency and was testing out and I am not getting any power out
the exciter is producing some power as I can hear the radio a hundred feet
away with it going into a dummy load. the watt meter tested okay on  another
radio. the pa is getting power and I have tried  adjusting the power control
to no avail. I don't think the triple low level amp is working. but I am not
sure how to fix it.





 
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[Repeater-Builder] Re: building a repeater

2004-06-02 Thread Ken Arck
David. 

If you don't mind I'm taking this back to the mail list, as there may be
others who can benefit from the info, ok?

The first bandpass filter is located behind the exciter board. If you
carefully remove the board, you'll see a piece of white teflon coax leaving
the board and plugging into a 3 stage filter assembly. The output of this
filter then goes through another piece of teflon coax to the tripler stage.
In other words, forget about the tripler at this point.

Since the filter in question simply unplugs from everything, I just pulled
it completely out of the chassis and tuned it on the bench, using a
tracking generator and, of course, 3 db pads on the input/output. It is
almost impossible to tune it with it mounting in the chassis anyway.

Since (as I remember) you don't have a tracking generator, you can use a
low power radio and a wattmeter if you want. Just tune for maximum
throughput and don't worry about using pads. 

Once retuned, drop it back in and you should be set.

Ken



At 01:55 PM 6/2/2004 -0400, you wrote: 

 followed the directions on the repeater builder webpage regarding  tuning
the SECOND bandpass assembly and the circulator but still couldn't  get
*any* power out of the PA. What I found I needed to also do was retune  the
FIRST bandpass filter assembly - the one between the exciter and  the
tripler stages. Once I did that, there was no problem at all in the  xmtr
making power.  

okay in layman's terms please I have the exciter  tuned up I have the
receiver tuned up but as you said no power. micor is going  from 468 to
443.400 so where in the cabinet is the next stage to  tune? is it behind
the metal plate in the middle between  the exciter and the power control as
I have that section open but I see no  adjustments in there. I believe what
I am looking at is the low level tripler  amp. but I see no way to tune it.  

--
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Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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Re: [Repeater-Builder] 2 repeaters on 1 antenna

2004-06-02 Thread Ken Arck
At 04:32 PM 6/2/2004 -0400, you wrote:

I am wanting to stick a low powered UHF repeater on the same antenna. 
This would be an optional control rx'er for the main repeater but will
run full time ISS audio (when FCC approved).  This would be on the 3rd
port of the RC210.  The low power repeater would probably be in the
442.000 range at about 5 to 10 watts.  Would run one of the small mobile
duplexers.
1) How much desense will this cause?
2) What equipment will I need to make this happen (multi-couplers, etc.)
and what to expect on cost?

A receiver multicoupler and transmitter combiner system is usually
quite expensive and lossy. Depending how far/close the involved freqs are
too, this factors into the amount of loss as well. As for duplexers though,
you don't need 'em with such a system.

To get a better idea of what's involved in such a system, here a couple of
links that may useful.

http://www.rfsworld.com/index.php?p=23
http://www.anglelinear.com/couplers/couplers.html

(BTW, AngleLinear makes some of the best stuff on the market, IMHO)

Ken


--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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Re: [Repeater-Builder] help I need

2004-06-04 Thread Ken Arck
At 10:09 PM 6/3/2004 -0400, you wrote:
will a vhf one work on a uhf repeater?

No. That filter is in the output of the tripler. Therefore it needs to
be UHF.

As for the epoxied slugs, I used some acetone and CAREFULLY worked them
back and forth with a high quality allen wrench. A little patience and
careful work allowed me to free every single one. 

Good luck!

Ken
--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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Re: [Repeater-Builder] help I need

2004-06-04 Thread Ken Arck
At 10:30 PM 6/3/2004 -0400, you wrote:
well you must of been lucky as mine are epoxied over so that I can't even
get a allen key in there

---Acetone and an Exacto knife will eventually clear it out :-)

Ken
(patience is a virtue, especially if you're a doctor ---poetic license)

--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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Re: [Repeater-Builder] help I need

2004-06-04 Thread Ken Arck
At 10:41 PM 6/3/2004 -0400, you wrote:
how about another way take the screws out the bottom punch out the epoxy run
a tap through to clean up the threads then make some new screws out of 10X32
1 long machine screw by cutting the heads off and putting a cut in the top
for a screw driver so that you can tune them up.

---I'm not sure there is enough room inside to get a beefy enough pair of
needle nose in there to do that but maybe there is. I guess replacing the
screws entirely would work, as they looked like plated steel to me but I
might be wrong about that..

Ken
--
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
AH6LE/R - IRLP Node 3000
http://www.irlp.net




 
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Re: [Repeater-Builder] MSR2000 VHF questions

2004-06-05 Thread Ken Arck
At 10:21 AM 6/5/2004 -0500, you wrote:
I'm thinking I'm a little light on drive and thus the amp doesn't
always excite.

---Announcing new Viagra for PA's. Always excite, all the time.







 
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[Repeater-Builder] Oh Lord, not another Part 97 question!

2004-06-07 Thread Ken Arck
Point to point link ID requirement:

1) When the link is first brought up and taken down
2) When the link is first brought up and taken down and every 10 minutes of
operation
3) At the end of communications
4) All of the above

The winner receives an atta boy!

Ken




 
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RE: [Repeater-Builder] Oh Lord, not another Part 97 question!

2004-06-07 Thread Ken Arck
At 11:09 AM 6/7/2004 -0400, you wrote:
Ken,

I would think this is a no-brainer...  as option 2 is inclusive of the
others and 10min interval is a requirement.

I keep getting dragged back into the ID debate but only as it applies
to auxiliary stations. Your position is my position - it doesn't matter
what it is, the every 10 minute rule applies regardless.

Not everyone is willing to take my word for it however. To which I say..
fine, do it as you feel comfortable doing it. I am not my brother's station
keeper :-)

Ken




 
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