Re: [Repeater-Builder] crossband

[mch]

It receives in one band and transmits in another.

Joe M.

sal90212 wrote:
> 
> hi all
>   i have q what dose crossband Repeater do ?



 

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Re: [Repeater-Builder] Z-Matcher adjustment

[NØATH]

I would certainly be interested to know where you obtained the digital
meters - that looks really
nice. I wonder if they are illuminated? Dave / NØATH

- Original Message - 
From: "Tony King - W4ZT" <[EMAIL PROTECTED]>
To: 
Sent: Monday, January 26, 2004 8:58 PM
Subject: [Repeater-Builder] Z-Matcher adjustment


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
output for min current.  Of course that should be our objective anyhow
but
many don't have an ammeter or voltmeter on the power source (I just
replaced stuck plastic meters on one of my Astrons with digital panel
meters: ).




 

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Re: [Repeater-Builder] circulators

[bradley glen]

Hi

Just a reminder that one has to use a filter after the
circulator as the materials used are inherent 2nd
harmonic generators.A 2nd harmonic filter or cavity
will be placed to assist for a clean signal.

regards

Brad  ZS5WT
--- Johnny <[EMAIL PROTECTED]> wrote:
> I know what you are saying. I picked up 3 from this
> guy a few weeks ago.
> Johnny
> 
> 
> Russ Stafford wrote:
> > We use them on EVERY transmitter in our system!
> > Some tower owners require them.
> > It is a great idea to use a circulator it solves
> many problems before they
> > are a problem.
> > 73 Russ, W3CH
> > Trustee, W3PS
> > Metro-Comm repeater
> > network.
> > 
> > 
> > - Original Message -
> > From: "Johnny" <[EMAIL PROTECTED]>
> > To: 
> > Sent: Sunday, January 25, 2004 3:10 PM
> > Subject: [Repeater-Builder] circulators
> > 
> > 
> > 
> >>
> >>There was some discussion on the list awhile back
> about circulators.
> >>I ran across this in my surfing.
> >>
> >>
> > 
> >
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3073999106&category=1502
> > 
> >>
> >>
> >>
> >>
> >>
> >>Yahoo! Groups Links
> >>
> >>To visit your group on the web, go to:
> >> http://groups.yahoo.com/group/Repeater-Builder/
> >>
> >>To unsubscribe from this group, send an email to:
> >> [EMAIL PROTECTED]
> >>
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> >>
> >>
> >>
> > 
> > 
> > 
> > 
> > 
> >  
> > 
> > Yahoo! Groups Links
> > 
> > To visit your group on the web, go to:
> >  http://groups.yahoo.com/group/Repeater-Builder/
> > 
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> > 
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> > 
> > 
> > 
> 
> 
> 
> 
> 
>  
> 
> Yahoo! Groups Links
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RE: [Repeater-Builder] TE Systems Amplifier

[Rogers, Ron]

Sounds like an exciter problem or duplexer/cavity filter tuning drift
problem, not an amplifier problem. (Assuming you are using a duplexer in the
repeater) 

Have you checked the input power to the amp from the exciter device ?? 
How are you measuring the output power in relation to the antenna ??? Before
the duplexer or on the output of the duplexer.

Amplifiers always heat up when used so cold WX should not make it reduce in
power since the unit should be "self-warming" after a few minutes of
"on-time". 

Ron 
-WB8ERB-

-Original Message-
From: Jimmy Floyd [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 27, 2004 8:48 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] TE Systems Amplifier


Has anyone that is using one of the TE Systems amplifiers ever had a problem
with a low power output during cold weather ?


We have one that has been running for 6 years and it seems when temp. drops
below 50 degrees F, seems the output power is lowered quite a bit. Before we
dig into the amp , I thought maybe someone on the list might have had the
same problem and found a solution.

Thanks

Jimmy Floyd
NQ4U




 

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[Repeater-Builder] crossband

[sal90212]

hi all 
  i have q what dose crossband Repeater do ?





 

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[Repeater-Builder] set my first repeater

[sal90212]

hi all 
  can any one tell me how set my first repeater ? what kind of 
system ? vhf or uhf is bast ? what is duplexer do ? what is the bast 
Antenna ?
  if any one know websit have all info abut repeater





 

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[Repeater-Builder] Re: TE Systems Amplifier

[skipp025]

A hot air (shrink tube) gun/blower with a narrow 
"tube" of directed hot air, pointed at locations 
within the amplifier chassis might tell you the 
story. 

cheers,

skipp 

www.radiowrench.com  (A Kenwood LMR Dealer)

> "Jimmy Floyd" <[EMAIL PROTECTED]> wrote:
> Has anyone that is using one of the TE Systems amplifiers ever had a
problem
> with a low power output during cold weather ?
> 
> 
> We have one that has been running for 6 years and it seems when
temp. drops
> below 50 degrees F, seems the output power is lowered quite a bit.
Before we
> dig into the amp , I thought maybe someone on the list might have
had the
> same problem and found a solution.
> 
> Thanks
> 
> Jimmy Floyd
> NQ4U




 

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[Repeater-Builder] Re: Motorola M120 COR Voltage

[kc7gf]

The COR output on an M120 is an open collector thru a transistor to ground, 
therefore you will not see any voltage change unless you supply a +5 or +12 
voltage through a 10K or 100K to this pin. Then when the collector switches to 
ground it will pull down the voltage on the end of the resistor to ground. The 
collector is protected by a 27 volt zener. 

Art - KC7GF



 

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Re: [Repeater-Builder] RF - Software

[Nate Duehr]

[EMAIL PROTECTED] wrote:
> 
> Ummm...  wasn't aware that Roger (VE2DBE) had given up his Canadian
> citizenship...  Hi.
> 
> see also:  http://www.yahoogroups.com/group/Radio_Mobile_Deluxe/

hmm.  oops.  Wonder where I got that idea?  I'm sure I saw a "DL" 
callsign (man it's been a while...) on the software splash page inside 
the software itself over a year ago when I last used it.  (I haven't 
booted Windows in months...)

Nate Duehr, [EMAIL PROTECTED] - WY0X



 

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

[Virden Clark Beckman]

For commercial tower installation watch those wind load numbers, most
towers want a 90-100+ wind load, 120+ within 5 miles of navigable water.
As far as efficiency goes there is no such thing as a multi-band
antenna, the ham patterns are generally so high on the horizon that you
would need a good aeronautical audience to make it useful. The ham
antennas usually get damaged fast unless you add braces about 2/3 to the
top for support in wind, if you could mount them upside down without
filling with water along with the brace they would work good - or used
at home stations as intended. 

[EMAIL PROTECTED] wrote:
> 
> I'm sure this has been discussed before but what are your thoughts
> about a good quality base station dual band (2/440) antenna's? I
> know I can get the Diamond / Comet but was woundering if there's
> anything out there in the commercial world.
> 
> Thanks..
> 
> 
> 
> Yahoo! Groups Links
> 
> To visit your group on the web, go to:
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> 
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-- 
73...Clark Beckman N8PZD

Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, ß227,
"Any and all nonsolicited commercial E-mail sent to this address
is subject to a download and archival fee of $500.00 U.S.".
E-mailing denotes acceptance of these terms.



 

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[Repeater-Builder] TE Systems Amplifier

[Jimmy Floyd]

Has anyone that is using one of the TE Systems amplifiers ever had a problem
with a low power output during cold weather ?


We have one that has been running for 6 years and it seems when temp. drops
below 50 degrees F, seems the output power is lowered quite a bit. Before we
dig into the amp , I thought maybe someone on the list might have had the
same problem and found a solution.

Thanks

Jimmy Floyd
NQ4U




 

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Re: [Repeater-Builder] RF - Software

[RSGilmore]

Ummm...  wasn't aware that Roger (VE2DBE) had given up his Canadian
citizenship...  Hi.

see also:  http://www.yahoogroups.com/group/Radio_Mobile_Deluxe/



On Mon, 26 Jan 2004 19:31:46 -0700 Nate Duehr <[EMAIL PROTECTED]> writes:
>> I've used one called Radio Mobile, written by a German Ham and
available for free -- 
> 
> http://www.cplus.org/rmw/english1.html
> 




 

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

[Chuck Kelsey]

Commercially they use two different antennas on the same mast. Combine to
one feedline or run two feedlines.

Chuck
WB2EDV



- Original Message - 
From: <[EMAIL PROTECTED]>
To: 
Sent: Tuesday, January 27, 2004 12:55 AM
Subject: RE: [Repeater-Builder] Dual Band Antenna's?


> Funny you should mention - just today, at work, I was told to try to find
> the same kind of antenna - dual band, but not the usual cheap "ham" stuff
> for one of our Emergency Operations Centers. We just have had nothing but
> poor results with them, and would like to spend the money for some "real"
> dual band antennas, if they exist. Otherwise, we'll go with separate
> antennas for 2M and 440 and get a M/A splitter.
>
> Larry K7LJ
>
>
> Original Message:
> -
> From:  [EMAIL PROTECTED]
> Date: Tue, 27 Jan 2004 05:39:19 -
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Dual Band Antenna's?
>
>
> I'm sure this has been discussed before but what are your thoughts
> about a good quality base station dual band (2/440) antenna's? I
> know I can get the Diamond / Comet but was woundering if there's
> anything out there in the commercial world.
>
> Thanks..
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Repeater-Builder/
>
> To unsubscribe from this group, send an email to:
>  [EMAIL PROTECTED]
>
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>
>
>
> 
> mail2web - Check your email from the web at
> http://mail2web.com/ .
>
>
>
>
>
>
>
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>
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>
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>
>
>





 

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Re: [Repeater-Builder] Z-Matcher adjustment

[Neil McKie]

  And unbending the pins too? 

  Neil - WA6KLA 

Don wrote:
> 
> At 09:58 PM 1/26/04 -0500, you wrote:
> >I just
> >replaced stuck plastic meters on one of my Astrons with digital 
> >panel meters: ).
> 
> And Tony that is One Nice Great job too .
> 
> Back to warming up old Solder Joints On a Micor Backplane
> 
> Don KA9QJG
> 
> 
> 
> Yahoo! Groups Links
> 
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Re: [Repeater-Builder] Z-Matcher adjustment

[Don]

At 09:58 PM 1/26/04 -0500, you wrote:
>I just
>replaced stuck plastic meters on one of my Astrons with digital panel
>meters: ).


And Tony that is One Nice Great job too .

Back to warming up old Solder Joints On a Micor Backplane

Don KA9QJG





 

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

[Mike Morris WA6ILQ]

At 05:39 AM 1/27/04 +, you wrote:

>I'm sure this has been discussed before but what are your thoughts
>about a good quality base station dual band (2/440) antenna's? I
>know I can get the Diamond / Comet but was woundering if there's
>anything out there in the commercial world.
>
>Thanks..

I've seen several situations where a 8-pole dual band antenna was
built by taking a VHF 4-pole and a UHF 4-pole and mounting both
on one mast (UHF on top), and either using two feedlines or a
TX-RX diplexer into one feedline.

One "gotcha" - watch out for the 3rd harmonic of the VHF TX
landing on the UHF input, and watch the VHF RX freq if the
UHF TX uses a tripler as the final multiplier.  I was told about
one system by the owner where he claimed to have to add a
UHF notch cavity to the VHF TX line to notch out a harmonic...
he referred to it as a "suck-out" cavity.

Mike WA6ILQ




 

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Re: [Repeater-Builder] RF Coverage Software

[Mike Morris WA6ILQ]

At 07:31 PM 1/26/04 -0700, you wrote:


>On Monday, Jan 26, 2004, at 18:48 America/Denver, Tim Shephard wrote:
>
> > Anyone know of a shareware package to give  you a coverage map when
> > you > enter the radio and terrain data?
>
>I've used one called Radio Mobile, written by a German Ham and
>available for free -- in exchange for some "sweat equity" in getting
>the terrain data downloaded and struggling through getting it set up to
>use that data at first.
>
>http://www.cplus.org/rmw/english1.html
>
>Haven't had a need to fire it up for a year or so... it's probably
>gotten better.
>
>Downloading all the terrain data needed definitely requires a broadband
>Internet connection.  It's pretty decent software for free.  Terrain
>data is available from the USGS for the US, and other areas of the
>world I don't know about.
>
>Otherwise, most of the large radio manufacturers sell (very expensive)
>software to do terrain/coverage analysis -- usually the big packages do
>have more features and better analysis tools, from what I've heard.
>(I've never used them.)  RM works well for a generic "Where will this
>repeater site cover well/poorly?"... etc.
>
>Have fun,
>
>Nate Duehr, [EMAIL PROTECTED] - WY0X

I have a link to RM off of www.repeater-builder.com 's  Antenna Systems
Information page at 
http://www.repeater-builder.com/rbtip/ant-sys-index.html ...
It's the last entry in the first section of links.

I"d be happy to add a "Getting Started with Radio Mobile" web page link to
the section if anybody wants to email me a summary of their notes on what
it took to get it working.

Mike WA6ILQ 




 

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

[Daron J. Wilson]

Anyone tried stuffing one of the ham dual banders inside a good radome
like an old Sinclair or DB products antenna that was bad?  I was
thinking of gutting one of the old bad ones I have, cutting Styrofoam or
something to keep the antenna in the middle of the radome and stuffing
it back inside there for protection.  I'm assuming that the failures
with the comet/diamond type are physical in nature.

Daron N7HQR


> Funny you should mention - just today, at work, I was told to try to
find
> the same kind of antenna - dual band, but not the usual cheap "ham"
stuff
> for one of our Emergency Operations Centers. We just have had nothing
but
> poor results with them, and would like to spend the money for some
"real"
> dual band antennas, if they exist. Otherwise, we'll go with separate
> antennas for 2M and 440 and get a M/A splitter.
> 
> Larry K7LJ
> 
> 
> Original Message:
> -
> From:  [EMAIL PROTECTED]
> Date: Tue, 27 Jan 2004 05:39:19 -
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Dual Band Antenna's?
> 
> 
> I'm sure this has been discussed before but what are your thoughts
> about a good quality base station dual band (2/440) antenna's? I
> know I can get the Diamond / Comet but was woundering if there's
> anything out there in the commercial world.
> 
> Thanks..
> 
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Repeater-Builder/
> 
> To unsubscribe from this group, send an email to:
>  [EMAIL PROTECTED]
> 
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> 
> 
> 
> 
> mail2web - Check your email from the web at
> http://mail2web.com/ .
> 
> 
> 
> 
> 
> 
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Re: [[Repeater-Builder] Dual Band Antenna's?]

[JOHN MACKEY]

I have used the Comet GP-15 with good results on 2 meters & 440 MHz in Sioux
City, Iowa.  It works on 6 meters but I have never actually tried it there.  I
compared the GP-15 with a 8 bay folded dipole on UHF & noticed no difference
in coverage.

This message coming to you LIVE from KS0F in beautiful SIOUX CITY, IOWA!!



[EMAIL PROTECTED] wrote:
> I'm sure this has been discussed before but what are your thoughts 
> about a good quality base station dual band (2/440) antenna's? I 
> know I can get the Diamond / Comet but was woundering if there's 
> anything out there in the commercial world.





 

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

[[EMAIL PROTECTED]]

Funny you should mention - just today, at work, I was told to try to find
the same kind of antenna - dual band, but not the usual cheap "ham" stuff
for one of our Emergency Operations Centers. We just have had nothing but
poor results with them, and would like to spend the money for some "real"
dual band antennas, if they exist. Otherwise, we'll go with separate
antennas for 2M and 440 and get a M/A splitter.

Larry K7LJ


Original Message:
-
From:  [EMAIL PROTECTED]
Date: Tue, 27 Jan 2004 05:39:19 -
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Dual Band Antenna's?


I'm sure this has been discussed before but what are your thoughts 
about a good quality base station dual band (2/440) antenna's? I 
know I can get the Diamond / Comet but was woundering if there's 
anything out there in the commercial world.

Thanks..






 

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mail2web - Check your email from the web at
http://mail2web.com/ .





 

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[Repeater-Builder] Dual Band Antenna's?

[WB8MCX]

I'm sure this has been discussed before but what are your thoughts 
about a good quality base station dual band (2/440) antenna's? I 
know I can get the Diamond / Comet but was woundering if there's 
anything out there in the commercial world.

Thanks..






 

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[Repeater-Builder] Yaesu rotor interface GS-23

[Gran Clark]

Hi All
Our club has a HF remote base controlled from 70 cm.  The beam rotor
is a Yaesu G1000S/SDX with a GS-23 RS232 interface.  The problem is
a -50 Deg error at 360 Deg.  There is no error at 0 Deg. 

There are two adjustment pots on the board but their functions are not
identified.
Does anyone have a manual or a calibration procedure? 
Gran K6RIF










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Re: [Repeater-Builder] Z-Matcher adjustment

[Lee Williams]

But when you remove the wattmeter,you change the tuning,it must be after the
duplexer or included within the matcher. Youre not dense,its that
critical...73,Lee
- Original Message -
From: "Ralph Mowery" <[EMAIL PROTECTED]>
To: 
Sent: Monday, January 26, 2004 11:41 PM
Subject: Re: [Repeater-Builder] Z-Matcher adjustment


>
> > Because the meter and its cable's electrical length will change the
> tuning.
> > You can read it at the antenna port of the duplexer if youre using one.
> This
> > has already been covered in previous posts.  73,Lee
>
> I must be dense .  From what I understand you have the transmitter (no
> tuning in the amplifier stages) , then the swr meter ,the Z-matcher , and
> then the duplexer.  It will not change the tuning of anything if you tune
> fhr z-matcher for minimum reflected power and then remove the swr meter.
> It will only change what the transmitter sees and it is not tunable
anyway.
> That is all that the matching section does in the duplex transmitter.  It
> does not tune for maximum efficiency if you follow the GE tuning
> instructions.
>





 

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Re: [Repeater-Builder] Z-Matcher Component Values and Sources

[Eric Lemmon]

Tony,

Thanks for the kind words.  I had no idea this topic would generate so
much interest!

Bearing in mind that the basic function of an impedance matcher is to
add a tuned output circuit to the power amplifier, the first step is to
tune the PA with the Z-matcher connected as close to the PA as
possible.  Use a good RF power meter, such as a Bird 43, and terminate
its output at a good 50 ohm load.  If the power climbs above the rated
value, reduce the drive level until you have achieved the best possible
match at full rated power.  What you have done at this point is to
optimize your PA for a purely resistive load.

Ah, but the "real world" is hardly ideal, and duplexers are no
exception.  Because duplexers are resonant devices, there will be some
reactance seen by the transmitter when it is connected to the duplexer's
TX input.  One of the ways to minimize (it cannot be eliminated) this
reactance is to always have a 6dB attenuator on both cables of the
network analyzer when tuning the cavities.  The attenuators also prevent
ringing in the cables when the cable length is harmonically related to
the wavelength of the signal.  This ensures that the tuning of the
cavities is based on 50 ohm inputs and outputs.  This is perhaps an
oversimplification, but it's close!

The next step is to connect the PA to the duplexer, with the Z-matcher
in place, using a non-magic length of 50 ohm cable.  Then, attach your
power meter and dummy load to the antenna connector of the duplexer. 
Key the transmitter, and fine-tune the Z-matcher for maximum forward
power.  If you antenna system is known to be a good match, you can
connect it and relax.

It is interesting to watch the PA current while tuning the Z-matcher. 
While the current will usually be at minimum at the point of maximum
efficiency, it doesn't always tell the full story.  There are many ways
to build a PA, and some of them are stable but not very efficient, and
some are the opposite.  To protect the PA, you want to limit the power
dissipation to a safe level.  Therefore, you must lower the drive level,
which lowers the current, and also the power output.  Moreover, always
be ready to reduce the drive level when you are tuning a PA with an
impedance matcher.

Regarding the sources for air variable piston trimmer capacitors, here
are some suppliers:

Voltronics, Inc.
Johanson Manufacturing Corp.
Compucon Distributors, Inc.
Murata-Erie North America, Inc.
Electronics Technologies, Inc.

73, Eric Lemmon WB6FLY

Tony King - W4ZT wrote:
> 
> 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?...



 

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[Repeater-Builder] Re: Z-Matcher adjustment

[Laryn Lohman]

We have a GE MII 225W repeater with the two 110W combined amps, 
driven with the single 110W amp.  The book on this thing describes 
how to adjust each Z matcher, but not any specific instructions when 
combined like these are.  The adjustments interact considerably. 

In this case, what is best, just go back and forth between the two 
amps while connected to the duplexer as normal, or is there a better 
way?  Will the best-efficiency adjustment coincide with the least 
reflected power adjustment?  If not, which one to pick?  Thanks

Laryn K8TVZ




 

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Re: [Repeater-Builder] Z-Matcher adjustment

[Ralph Mowery]

> Because the meter and its cable's electrical length will change the
tuning.
> You can read it at the antenna port of the duplexer if youre using one.
This
> has already been covered in previous posts.  73,Lee

I must be dense .  From what I understand you have the transmitter (no
tuning in the amplifier stages) , then the swr meter ,the Z-matcher , and
then the duplexer.  It will not change the tuning of anything if you tune
fhr z-matcher for minimum reflected power and then remove the swr meter.
It will only change what the transmitter sees and it is not tunable anyway.
That is all that the matching section does in the duplex transmitter.  It
does not tune for maximum efficiency if you follow the GE tuning
instructions.





 

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Re: [Repeater-Builder] Z-Matcher adjustment

[Virden Clark Beckman]

The zmatcher matches the reactive impedance to the transmitter, not the
resistive load - any cable changes or anything will affect this
reactance.

Ralph Mowery wrote:
> 
> > 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
> 
> 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.
> 
> 
> 
> Yahoo! Groups Links
> 
> To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Repeater-Builder/
> 
> To unsubscribe from this group, send an email to:
>  [EMAIL PROTECTED]
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-- 
73...Clark Beckman N8PZD

Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, ß227,
"Any and all nonsolicited commercial E-mail sent to this address
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Re: [Repeater-Builder] Z-Matcher adjustment

[Tony King - W4ZT]

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 match at the impedance of 
the wattmeter, that might work, but remember, we're probably not tuning to 
a 50 ohm match between the PA and the Z-match, rather between the Z-match 
and the duplexer (if it was aligned at the factory etc). So, I would fear 
that a change in length of cables between the PA and the Z-match would 
cause a change in the match and associated problems.

I haven't seen the DB Products Z-match but having the directional coupler 
built in certainly negates the need for placing anything else in line.

This is a very interesting thread and I appreciate all the great ideas 
being shared!

73,
Tony W4ZT




 

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Re: [Repeater-Builder] Z-Matcher adjustment

[Lee Williams]

Because the meter and its cable's electrical length will change the tuning.
You can read it at the antenna port of the duplexer if youre using one. This
has already been covered in previous posts.  73,Lee
- Original Message -
From: "Ralph Mowery" <[EMAIL PROTECTED]>
To: 
Sent: Monday, January 26, 2004 11:10 PM
Subject: Re: [Repeater-Builder] Z-Matcher adjustment


>
>
> > 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
>
> 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.





 

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[Repeater-Builder] Re: Z-Matcher adjustment

[k0jxi]

Have not looked at all the posts about the z matcher but has anyone memtioned 
that DB Products makes one for several
bands---150 and 450  and probably other bands. They have a reflected 
voltage/wattage metering circuit built in and one
tunes it for min reverse reading. Just a simple pi network.  Works great.

73, Dale -


 In Repeater-Builder@yahoogroups.com, Tony King - W4ZT <[EMAIL PROTECTED]> 
wrote:
> 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 
> output for min current.  Of course that should be our objective anyhow but 
> many don't have an ammeter or voltmeter on the power source (I just 
> replaced stuck plastic meters on one of my Astrons with digital panel 
> meters: ).
> 
> 73,
> Tony W4ZT
> 
> At 03:16 PM 1/26/2004, you wrote:
> 
> >Tune for best PA efficiency, not maximum output.
> >
> > --- Jeff




 

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Re: [Repeater-Builder] Z-Matcher adjustment

[Ralph Mowery]

> 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

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.






 

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Re: [Repeater-Builder] Z-Matcher Component Values

[Virden Clark Beckman]

Just the lowest power supply drain, when you do this into the installed
system you can then insert a wattmeter and adjust the output as desired,
probably on a station heat sink to 98 percent rated output. It has been
mentioned sporadically here about the isolator/circulator as an
additional benefit if the antenna is torn away from the tower by mother
nature, making the capacitor adjustment first with the ancillary
equipment all in place then come back and set the output level, remove
the meter from the pa to isolator port line and you can sleep well.

Chuck Kelsey wrote:
> 
> Would that mean to tune for the highest power level out at the lowest
> current draw?
> 
> Chuck
> WB2EDV
> From: "Jeff DePolo WN3A" <[EMAIL PROTECTED]>
> >
> > Tune for best PA efficiency, not maximum output.
> >
> > --- Jeff
-- 
73...Clark Beckman N8PZD



 

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[Repeater-Builder] Z-Matcher adjustment

[Tony King - W4ZT]

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 
output for min current.  Of course that should be our objective anyhow but 
many don't have an ammeter or voltmeter on the power source (I just 
replaced stuck plastic meters on one of my Astrons with digital panel 
meters: ).

73,
Tony W4ZT

At 03:16 PM 1/26/2004, you wrote:

>Tune for best PA efficiency, not maximum output.
>
> --- Jeff




 

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Re: [Repeater-Builder] RF Coverage Software

[gervais fillion]

http://www.cplus.org/rmw/english1.html

ve2ckn



>From: Nate Duehr <[EMAIL PROTECTED]>
>Reply-To: Repeater-Builder@yahoogroups.com
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] RF Coverage Software
>Date: Mon, 26 Jan 2004 19:31:46 -0700
>
>
>On Monday, Jan 26, 2004, at 18:48 America/Denver, Tim Shephard wrote:
>
> > Anyone know of a shareware package to give  you a coverage map when
> > you
> > enter the radio and terrain data?
>
>I've used one called Radio Mobile, written by a German Ham and
>available for free -- in exchange for some "sweat equity" in getting
>the terrain data downloaded and struggling through getting it set up to
>use that data at first.
>
>http://www.cplus.org/rmw/english1.html
>
>Haven't had a need to fire it up for a year or so... it's probably
>gotten better.
>
>Downloading all the terrain data needed definitely requires a broadband
>Internet connection.  It's pretty decent software for free.  Terrain
>data is available from the USGS for the US, and other areas of the
>world I don't know about.
>
>Otherwise, most of the large radio manufacturers sell (very expensive)
>software to do terrain/coverage analysis -- usually the big packages do
>have more features and better analysis tools, from what I've heard.
>(I've never used them.)  RM works well for a generic "Where will this
>repeater site cover well/poorly?"... etc.
>
>Have fun,
>
>Nate Duehr, [EMAIL PROTECTED] - WY0X
>
>
>
>
>
>
>Yahoo! Groups Links
>
>To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Repeater-Builder/
>
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>
>

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Re: [Repeater-Builder] RF Coverage Software

[Nate Duehr]

On Monday, Jan 26, 2004, at 18:48 America/Denver, Tim Shephard wrote:

> Anyone know of a shareware package to give  you a coverage map when  
> you
> enter the radio and terrain data?

I've used one called Radio Mobile, written by a German Ham and 
available for free -- in exchange for some "sweat equity" in getting 
the terrain data downloaded and struggling through getting it set up to 
use that data at first.

http://www.cplus.org/rmw/english1.html

Haven't had a need to fire it up for a year or so... it's probably 
gotten better.

Downloading all the terrain data needed definitely requires a broadband 
Internet connection.  It's pretty decent software for free.  Terrain 
data is available from the USGS for the US, and other areas of the 
world I don't know about.

Otherwise, most of the large radio manufacturers sell (very expensive) 
software to do terrain/coverage analysis -- usually the big packages do 
have more features and better analysis tools, from what I've heard.  
(I've never used them.)  RM works well for a generic "Where will this 
repeater site cover well/poorly?"... etc.

Have fun,

Nate Duehr, [EMAIL PROTECTED] - WY0X




 

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RE: [Repeater-Builder] Z-Matcher Component Values

[Jeff DePolo WN3A]

Tune for the least current draw at the rated (or de-rated, if that's what
you want) power output.

--- Jeff


> -Original Message-
> From: Chuck Kelsey [mailto:[EMAIL PROTECTED] 
> Sent: Monday, January 26, 2004 8:58 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Z-Matcher Component Values
> 
> 
> Would that mean to tune for the highest power level out at the lowest
> current draw?
> 
> Chuck
> WB2EDV
> 
> 
> 
> - Original Message - 
> From: "Jeff DePolo WN3A" <[EMAIL PROTECTED]>
> To: 
> Sent: Monday, January 26, 2004 3:16 PM
> Subject: RE: [Repeater-Builder] Z-Matcher Component Values
> 
> 
> >
> > Tune for best PA efficiency, not maximum output.
> >
> > --- Jeff
> >
> > -
> > Jeff DePolo WN3A
> > Broadcast and Communications Consultant
> >
> 
> 
> 
> 
> 
>  
> 
> Yahoo! Groups Links
> 
> To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Repeater-Builder/
> 
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> 
> 
> 




 

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[Repeater-Builder] Re: What is it ??

[nj902]

--- In Repeater-Builder@yahoogroups.com, Johnny <[EMAIL PROTECTED]> wrote:
"...I am the proud owner of a TFE 6050A. Now I gotta figure out what 
to do with it..."
___

The TFE-6050 is a harmonic filter that followed the varactor tripler 
output in the UHF Motran Mark XII [probably also in the similar UHF 
FACTS transceiver]

It sold for $65 in the 1982 price list.





 

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[Repeater-Builder] GE PA deck burned resistor

[tony dinkel]

I have a 19D424786G4 Rev A PA deck that I am working on for a friend.  It 
has a burned up 2 watt resistor with a 27 pF across it.  Does this mean one 
of the PA xstrs is toast?  Can these things be gotten?  Suggestions?

td
wb6mie

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Re: [Repeater-Builder] Z-Matcher Component Values

[Chuck Kelsey]

Would that mean to tune for the highest power level out at the lowest
current draw?

Chuck
WB2EDV



- Original Message - 
From: "Jeff DePolo WN3A" <[EMAIL PROTECTED]>
To: 
Sent: Monday, January 26, 2004 3:16 PM
Subject: RE: [Repeater-Builder] Z-Matcher Component Values


>
> Tune for best PA efficiency, not maximum output.
>
> --- Jeff
>
> -
> Jeff DePolo WN3A
> Broadcast and Communications Consultant
>





 

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[Repeater-Builder] RF Coverage Software

[Tim Shephard]

Anyone know of a shareware package to give  you a coverage map when  you
enter the radio and terrain data?

-Tim
http://www.telecom-pros.com/tim/tim
eFax (508) 590-0302




 

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Re: [Repeater-Builder] Problems tuning GE Mastr II exciter

[Glenn Little WB4UIV]

What did this test point read prior to changing the frequency?

If you did not verify operation at (or near) the original frequency, you 
may have a component failure.

73
Glenn
WB4UIV

At 02:39 PM 01/26/04 +, you wrote:
>I am having problems getting my GE Mastr II VHF exciter to tune
>properly. All goes well until I start tuning T110. I have my meter on
>pins 5 (-) and 6 (+) but get no reading at all. I have adjusted T110
>all the way through but still see no reading. When I ground my meter
>to chassis ground I get about 9 volts here. Does anyone have any
>ideas what I might be doing wrong? I am fairly new to repeater
>building and have not seen this problem yet.
>
>Thanks
>
>Jay
>
>
>
>
>
>
>Yahoo! Groups Links
>
>To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Repeater-Builder/
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Re: [Repeater-Builder] Re: Z-Matcher Component Values

[Jim Cicirello]

Thanks Skipp, I will start searching. Looks like a good project.

73  JIM   KA2AJH


- Original Message - 
From: "skipp025" <[EMAIL PROTECTED]>
To: 
Sent: Monday, January 26, 2004 12:15 PM
Subject: [Repeater-Builder] Re: Z-Matcher Component Values


> Hi Jim,
> 
> Probably someone like ATC, which is American 
> Technical Ceramics has a similar product. I 
> buy from them all the time. You won't like 
> the prices. 
> 
> I do see piston caps on ebay quite a bit, they 
> seem to be cheap enough for the one off project 
> builder. 
> 
> cheers 
> 
> skipp 
> 
> www.radiowrench.com 
> 
> --- In Repeater-Builder@yahoogroups.com, "Jim Cicirello" <[EMAIL PROTECTED]>
> wrote:
> > Great JoB!
> > Does anyone know a supplier for these capacitors? 
> > Thanks again for your efforts, this design is nice.
> > 
> > 73 JIMKA2AJH
> 
> 
> 
> 
> 
>  
> 
> Yahoo! Groups Links
> 
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> 





 

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[Repeater-Builder] What is it ??

[Johnny]

I am the proud owner of a TFE 6050A.
Now I gotta figure out what to do with it.
It is 2" x 1" x 5   with 2 cables permenatly attached on one end and 3 
adjustment screws on the other end.
It came with a little TFE 6030A  4 cavity Motorola mobile duplexer.
Johnny




 

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