[Repeater-Builder] RE: 220 repeater receiver recommendations?

2007-02-22 Thread tony dinkel
My answer would be none of the above.  Get a VHF micor and have Kevin do the 
220 mod to it.  I cannot imagine any of the receivers mentioned coming close 
to that in performance.


Good luck,
td
wb6mie

Our group is in need of replacing the receiver on our 220 box and I
wanted to solicit some opinions from the group.

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[Repeater-Builder] Milcom/Uniden ARX2125 220 MHz Amplifier schematics/info

2007-02-22 Thread George Sintchak
Hello all. I'm looking for more info, schematics, etc on this nice 220 
MHz amp, built around 1992. I have the info that N2CKH has posted on 
his website (see http://www.n2ckh.com/125m_rptr.htm) but I would like 
more specific info (schematics) about this amplifier chassis. I've 
searched the 'net and both Uniden & Milcom websites without any other 
results. This Amp was part of the now defunct ACSB system that UPS was 
going to use back when we lost part of the 220 band. Any new info would 
be helpful. ( I already have info on the CA2832C hybrid and the Polyfet 
F1004 devices)
Tnx, 
George, WA2VNV



Re: [Repeater-Builder] Re: 220 repeater receiver recommendations?

2007-02-22 Thread no6b
At 2/22/2007 19:01, you wrote:
>Ken,
>
>We not only do complete repeaters, we can custom build just about anything 
>you want or need. We can simply build a rock-solid high-quality 220 
>receiver for you. We have done several receivers in the past that are rack 
>mountable in a 2 unit rack space. I have a GE mastr II receiver that I am 
>just finishing up. It came out looking so nice that I am going to take 
>pictures as a show piece. Micor receivers would be VERY similar in 
>construction.
>
>In my opinion, 2 things:
>
>1. A Micor makes a much better repeater on 2M and 220 than a GE MII. 
>(sorry GE loyalists!!)

Interesting conclusion.  Care to state any specific advantages the Micor 
has over the G.E.?  I'm particularly interested in any shortcomings of the 
G.E. that are not easily overcome.

Bob NO6B


>I think a Mastr II makes a much better repeater on UHF (sorry Micor 
>loyalists!!) I would suggest a Micor for your 220 Machine.
>
>2. If you're going to spend money on a new receiver, why not spend a bit 
>more and get a completely new machine. Think about it, if your receiver is 
>not 100%, what's saying that your transmitter is running at 100%? The 
>notable thing about spectrum repeaters is that they lived up to their 
>name, they took up the WHOLE spectrum. This might even be what is happing 
>that you assume is a bad receiver. Instead of a bad receiver, you may have 
>a spurious transmitter that is totally wiping your receiver off the map. 
>Duplexers are meant to isolate, but there is only so much they can isolate.
>
>If you'd like a quote on a new machine or a quote for a new receiver, feel 
>free to e-mail or call.
>
>Scott - Owner Repeater-Builder (the company)
>www.repeater-builder.com/custombuilt/
>
>Scott Zimmerman
>Amateur Radio Call N3XCC
>474 Barnett Road
>Boswell, PA 15531
>- Original Message -
>From: Ken Harrison
>To: Repeater-Builder@yahoogroups.com
>Sent: Thursday, February 22, 2007 8:39 PM
>Subject: [Repeater-Builder] Re: 220 repeater receiver recommendations?
>
>Thanks for the recommendation, Don. Though I'm sure a MastrII would
>be a great conversion for 220, we (in the group sense) want to try to
>save some of our money to get a remote base setup going on our
>repeater, too. Our small savings would be wiped out to replace the
>entire repeater, in spite of it being handy to have a complete spare
>should there be a problem in the future.
>
>Thanks,
>Ken
>
>--- In 
>Repeater-Builder@yahoogroups.com, 
>"Don KA9QJG" <[EMAIL PROTECTED]> wrote:
> >
> > Ken first of All I noticed You stated Our group, so I would assume
>You have
> > others kicking in to the Cost, I do not and I had Scott build Me up
>a 220
> > Repeater System, He did it in the process of Building a house and
>Moving All
> > I had to do was Program the Controller, Hook up the Amp, Power Supply
> > Duplexers, and Ant, I have never had any Problems for over a Yr.
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.441 / Virus Database: 268.18.3/697 - Release Date: 2/22/2007 
>11:55 AM
>
>




Re: [Repeater-Builder] 220 repeater receiver recommendations?

2007-02-22 Thread no6b
At 2/22/2007 15:00, you wrote:
>Our group is in need of replacing the receiver on our 220 box and I
>wanted to solicit some opinions from the group.
>
>Our current receiver is a Spectrum using 3rd overtone crystals.  We
>are looking at the following:
>
>1. Spectrum receiver using 5th overtone crystals.
>
>2. Hamtronics R302 Synthesized receiver.
>http://www.hamtronics.com/r302.htm
>
>3. Hamtronics R100 crystal receiver.
>http://www.hamtronics.com/r100.htm
>
>4. Hi-Pro R4V
>http://www.hiprorepeaters.com/Receivers.htm
>
>What are you using and are you happy with it?  Would you buy any
>particular one again?  Why or why not.

I maintain a couple of 220 repeaters that use modified Midland 13-509 
boards.  Despite their apparent simplicity & lack of filtering, they've 
performed very well for us.

Bob NO6B




Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread no6b
At 2/22/2007 11:36, you wrote:
>The number of active ham repeaters in my area is way, way down in
>comparison to levels of 10 years ago.  It isn't uncommon to monitor a
>repeater frequency and hear no traffic for weeks.  Some clubs &
>individuals have just walked away from coordinated pairs.
>
>However, there are a few repeaters that have remained active, although
>certainly not to the extent they were in the past.  Interestingly, even
>though traffic is way down, there's still a waiting list in my area for
>coordinated pairs on all bands.
>
>Questions:
>
>1) Has there been a decline in traffic and the number of active
>repeaters in your area?

Yes & no.  In terms of "total TX time", I'd say no decline & maybe even an 
increase.  However, the number of "simultaneous QSOs" in a given region is 
way down.  The reason is with less traffic on the bands, more systems are 
linking together.  This is good for providing improved coverage, but it 
also results in many systems retransmitting the same traffic.  Sometimes I 
can hear the same QSO on over half a dozen frequencies, & often these 
multiple systems aren't that far apart in location.  Occasionally I'll even 
hear the same traffic coming out 2 different repeaters at the same site!

So I guess one could say we're making good use of our spectrum, just not 
very efficiently.  Given the reduced amount of actual communicating going 
on, maybe it doesn't matter?

Bob NO6B



>2) If so, what do you feel the primary cause is?
>
>3) What can be done to generate renewed interest?
>
>
>
>
>
>
>
>
>Yahoo! Groups - Join or create groups, clubs, forums & communities. Links
>
>
>
>




[Repeater-Builder] Re OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Al Wolfe
Tony, et al.

1) Yes

2) I believe one of the main causes it that there are just too many 
repeaters! This causes fragmentation of the users. Case in point: Here in 
Champaign County, IL, there are presently three UHF machines and two VHF 
machines. There have been at least three other two meter machines that have 
been turned off and their coordination turned in.

In 1974 there was one repeater. Everyone monitored it and used it. 
Everyone knew everyone. Newcomers were welcomed and elmered. A call at any 
hour of the day or night would likely get an answer.

Then ESDA decided they needed their own repeater because the main one 
was too busy. This siphoned off several users. Then an RTTY repeater was put 
on the air. More users disappeared. Then a 440 machine came on line and more 
fragmentation occurred. Then another 440 system was installed. Then the 
students at the university club had to have their own system. A couple of 
garage repeaters came on line.

Each of these repeaters has fragmented the user base. Each system has 
its own bunch of followers who seldom interact with other systems or their 
users. Of course, one could scan all the repeaters and many do, but it's not 
the same. There is little sense of belonging or allegiance to more than one 
group. (Although, for the most part, we do pretty much all do get along.)

Realistically, (but probably not likely) half the repeaters need to be 
shut off if we are ever going to regenerate the camaraderie of the past.

3)Turn off a lot of under-used, ego repeaters.



Having been a party to most of the local repeater efforts, I know see 
the error of my ways. We have built, maintained, and operated repeaters 
because we could and had the skills and opportunity to do it. Let's face it, 
it's an ego trip to put a system together and have it work well, to overcome 
all kinds of obstacles, to maintain it in fine shape, to improve the 
coverage a bit, and yes, to even pull your hair out sometimes. It's a 
challenge and not just anyone can do it. Sometimes we even get a little 
respect for our efforts.

Again, an awful lot of repeaters exist just because they can rather than 
any real or imagined need for them. But who's going to decide this? I don't 
want to turn mine off.

(Flame suit on)
73,
Al, K9SI



>Questions:

>1) Has there been a decline in traffic and the number of active
>repeaters in your area?

>2) If so, what do you feel the primary cause is?

>3) What can be done to generate renewed interest?


 



[Repeater-Builder] Re: Johnson PPL 6060 manual needed

2007-02-22 Thread Mike - W5JR (f/k/a N5FL)





Posted by: "JOHN MACKEY" [EMAIL PROTECTED] 
jmackey_usa_net





Wed Feb 21, 2007 8:26 pm (PST)



are you saying a 45-470 MHz PPL6060 will work in the 420 MHz range?


Absolutely!!  I've moved many an EFJ to 420 operation - 558, 559, 
6060.  And some of them began life as T-Band units, 470-512 MHz.  In 
the RX, use high side injection xtals.  Matter of fact, use your 
existing 440 or 450 xtals to test with.  The radio will hear a 
signal -21.4 MHz lower than your current freq.  You may have to add 
a 1/4 turn to each coil in the multiplier helical.  In the front 
end, use a 1/4 turn for 427-433 range and a half turn for the low 
end.  We used regular house wire, 10 ga I think for the 558/559 
units, formed around the proper sized drill bit.  Tack solder it to 
the end of the existing coils.  They tune right up.  Sometimes, 1/4 
inch longer screws is all it takes.  If they are T-Band, use more coil.


On the TX, some padding in parallel with caps in the multipliers is 
needed to bring them in range, especially if TX'ing low.  It is easy 
to get a doubler acting like a tripler, so be sure to have a 
spectrum analyzer on hand to verify what freq the RF is on.  Same is 
true for the amplifier stages.  Two of the helicals in the 6060 
casting are for TX and may need the coil extension trick like the RX 
side.  They make good 420 full duplex link radios, similar to a modified MVP.


- mike - w5jr


[Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Coy Hilton
I lived in Bryan/Collage Station for a while and never did find out 
what animal husbandry has to do with electronics <;) Check with your 
son and let me know.


--- In Repeater-Builder@yahoogroups.com, "Steve Bosshard \(NU5D\)" 
<[EMAIL PROTECTED]> wrote:
>
> I posted the comment about shiny antennas totally tongue in cheek 
and not to 
> be taken seriously.  A coating of aluminum oxide should have 
practically no 
> effect on antenna performance.  As far as particles vs waves, seems 
like 
> some theory fits particles and other theory fits wave theory (Planks 
and 
> Maxwells?) - I can get more info from our oldest son, AD5RN if 
needed - he 
> is studying that kind of stuff down at Texas A&M..  Steve NU5D
>




Re: [Repeater-Builder] 2 pin molex connector spectra speaker

2007-02-22 Thread Gary
Yeah;
speaker side- #480319-0 (Mouser # 571-14803190)
pins- #60618-1 (Mouser #571-606181)
harness side- #480318-0 (Mouser #571-14803180)
sockets- #60617-1 (Mouser #571-606171)

Check Mouser's website or catalog for the other pin and/or socket contact sizes 
available. These fit 24-18
ga. but there are others. The connector series is known as Mate-N-Lok.
Gary

bforestal wrote:

> Anyone know what the part number is for the 2 pin molex connector for the 
> spectra speaker
> cable?  I'm looking for the speaker side, either the Molex or Motorola part 
> number will do.
>
> Thanks in advance,
> Bruce WB6ARE
>
>
> Yahoo! Groups - Join or create groups, clubs, forums & communities. Links
>
>
>



[Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Coy Hilton
--- In Repeater-Builder@yahoogroups.com, "W8MIA" <[EMAIL PROTECTED]> 
wrote:
>
> There is one SMALL problem with your Hypothesis. RF is transmitted 
by
> Electrons. Light is transmitted by Photons. Science has a rather 
good
> handle on Electrons but Photons are still not fully understood!!!
> 
This having been said does anyone have an understanding of 
Smoketrons and how they propagate<;)



> Apples & Oranges!!
> 
> August
> W8MIA
> 

> 
> 
> -- In Repeater-Builder@yahoogroups.com, "skipp025"  
wrote:
> >
> > 
> > The advantage of a dark antennas is how snow and ice might melt 
> > off it faster... and most of all how you can't easily see a 
black 
> > mobile whip on your car so it tends not to get tampered with as 
> > much. 
> > 
> > s. 
> > 
> > > Roger Grady  wrote:
> > >
> > > At 12:39 PM 2/21/2007, Steve Bosshard \(NU5D\) wrote:
> > > 
> > > >Regarding a clean and shiny antenna, we had a discussion at
> coffee. The
> > > >preposition was that radio waves and light have many
> similarities, ie.,
> > > >wavelength, reflection, Fresnel behavior, and so forth. Using 
these
> > > >similarities, a mirror reflects light, and a dark surface 
absorbs
> > light,
> > > >so, wouldn't a shiny antenna reflect incoming
> > signals while
> > > >a dark colored antenna absorbs signals? This may only apply to
> > receiving
> > > >antennas - hope I can get this idea to market before the 
April 1
> > edition of
> > > >QST..  ..  .. de nu5d
> > > 
> > > Cute idea. However... How do you know aluminum that's shiny or
> black at 
> > > visible light frequencies is still shiny or black at radio
> frequencies? 
> > > Maybe RF black is visible day-glo orange, or pea-soup green. Or
> > maybe it 
> > > would absorb light so well as to be invisible. I think this 
would
> > make a 
> > > good April 1 article. I haven't written one for our repeater 
club 
> > > newsletter for a few years, maybe it's time for another. 
Assuming
> > you don't 
> > > mind if I borrow your premise.
> > > 
> > > As I think about it a vague sense of deja-vu is forming. Maybe 
there
> > was an 
> > > April Fool's article years ago somewhere about invisible 
antennas?
> > > 
> > > Roger Grady  K9OPO
> > >
> >
>




[Repeater-Builder] 2 pin molex connector spectra speaker

2007-02-22 Thread bforestal

Anyone know what the part number is for the 2 pin molex connector for the 
spectra speaker 
cable?  I'm looking for the speaker side, either the Molex or Motorola part 
number will do.

Thanks in advance,
Bruce WB6ARE



Re: [Repeater-Builder] Re: 220 repeater receiver recommendations?

2007-02-22 Thread Scott Zimmerman
Ken,

We not only do complete repeaters, we can custom build just about anything you 
want or need. We can simply build a rock-solid high-quality 220 receiver for 
you. We have done several receivers in the past that are rack mountable in a 2 
unit rack space. I have a GE mastr II receiver that I am just finishing up. It 
came out looking so nice that I am going to take pictures as a show piece. 
Micor receivers would be VERY similar in construction.

In my opinion, 2 things:

1. A Micor makes a much better repeater on 2M and 220 than a GE MII. (sorry GE 
loyalists!!) I think a Mastr II makes a much better repeater on UHF (sorry 
Micor loyalists!!) I would suggest a Micor for your 220 Machine.

2. If you're going to spend money on a new receiver, why not spend a bit more 
and get a completely new machine. Think about it, if your receiver is not 100%, 
what's saying that your transmitter is running at 100%? The notable thing about 
spectrum repeaters is that they lived up to their name, they took up the WHOLE 
spectrum. This might even be what is happing that you assume is a bad receiver. 
Instead of a bad receiver, you may have a spurious transmitter that is totally 
wiping your receiver off the map. Duplexers are meant to isolate, but there is 
only so much they can isolate.

If you'd like a quote on a new machine or a quote for a new receiver, feel free 
to e-mail or call.

Scott - Owner Repeater-Builder (the company)
www.repeater-builder.com/custombuilt/

Scott Zimmerman 
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 15531
  - Original Message - 
  From: Ken Harrison 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Thursday, February 22, 2007 8:39 PM
  Subject: [Repeater-Builder] Re: 220 repeater receiver recommendations?


  Thanks for the recommendation, Don. Though I'm sure a MastrII would
  be a great conversion for 220, we (in the group sense) want to try to
  save some of our money to get a remote base setup going on our
  repeater, too. Our small savings would be wiped out to replace the
  entire repeater, in spite of it being handy to have a complete spare
  should there be a problem in the future.

  Thanks,
  Ken

  --- In Repeater-Builder@yahoogroups.com, "Don KA9QJG" <[EMAIL PROTECTED]> 
wrote:
  >
  > Ken first of All I noticed You stated Our group, so I would assume
  You have
  > others kicking in to the Cost, I do not and I had Scott build Me up
  a 220
  > Repeater System, He did it in the process of Building a house and
  Moving All
  > I had to do was Program the Controller, Hook up the Amp, Power Supply
  > Duplexers, and Ant, I have never had any Problems for over a Yr.



   


--


  No virus found in this incoming message.
  Checked by AVG Free Edition.
  Version: 7.5.441 / Virus Database: 268.18.3/697 - Release Date: 2/22/2007 
11:55 AM


Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Nate Duehr
On 2/22/07, Tony L. <[EMAIL PROTECTED]> wrote:
> Questions:
>
> 1) Has there been a decline in traffic and the number of active
> repeaters in your area?

Reading everyone else's comments, I'm almost embarrassed to say this but...
Our activity level in our club has been going up here in Denver.
Especially on our wide-coverage VHF standalone rag-chew machine.

Usage of our large VHF/220 linked system is flat or down a little.
Usage of our autopatch is -- nil.  Usage of our IRLP links... high.

The UHF machines have always sat quiet most of the day, but seem to
have a little activity once in a while, with the exception of the
high-coverage UHF machine that has EchoIRLP on it.

That one's getting a work-out... but it covers easily from Cheyenne,
WY (we've had mobiles use it from 5 miles East of Laramie, WY) to the
ridge-line between Colorado Springs and Denver to the south, and
virtually the entire population of the Denver Metropolitan area, minus
Boulder, CO... it's shadowed into there.  3-4 million people in the
coverage area of that one machine -- probably 20-25 regular users.

I always use that machine to call other tech-heads I've met through
IRLP, the IRLP Convention in Las Vegas a few years ago, and other
out-of-towners who've moved away or whatever... that want to keep in
touch via IRLP.

Another local ham calls the Vancouver area virtually every day on
it... and there's a rowdy bunch up there... who are fun to talk with.

(We have such a high density of good well-set-up IRLP enabled
repeaters around here, that when people leave Denver for good...
moving, job change, etc... they set up IRLP nodes where they move to,
so they can call back here and say hello once in a while.  You get
used to having it available to you.)

> 2) If so, what do you feel the primary cause is?

New hams and content.  Some hams tend to only participate in the
regularly scheduled Nets on the big linked VHF system -- there's a Net
just about every night of the week, with various special interests
running each one.

The new hams are on the air and rag-chewing, and just as interested as
I was when I started in the early 90's.

http://www.w0cra.org/info/nets.html

I daresay (and have said it on the air too) that our club's repeaters
wouldn't be very interesting without those groups using them.  We
enjoy having them around!  We would be pretty dead without 'em.

As far as the rag-chew goes... it gets mighty crazy on our wide-area
VHF system... almost to the point of too crazy... and we've always
kinda let it "go there"... as long as it stays legal and relatively
sane...

Hams with any desire to have an orderly and simple conversation,
usually walk away from their rigs shaking their heads when they listen
to that system... and once in a while I have to send out notices to
people to back off of certain topics, etc... (We pride ourselves on
being a system that FAMILIES can use, so no matter what the FCC
says... sexual innuendo and topics are generally in poor taste no
matter how you slice it... always assume kids are listening.)

The doubling has been so bad that a new phrase popped up this last
year... (people don't wait for the courtesy tone at all on that
system, which grates at my nerves, but whatever...)... people key up,
say a few words, say "check for double", unkey and then continue.
Kinda funny.  Sometimes people turn it into a personal zinger.. "Check
for Nate"... Ha...

Many local older hams HATE how that repeater sounds and came
complaining to me when it was down a year ago -- begging us to put it
back on the air since the ragchewers had migrated to their repeaters.
People sometimes call it the "trash repeater", but I've heard REAL
trash repeaters in Los Angeles... and it's definitely NOT that.

So... I laughed quietly to myself all the way to the PA replacement...
WE HAVE ACTIVITY... their machines sit quiet... and dead... most of
the day.

(So yes... overall activity is probably down... but not our systems!)

That repeater is not for the faint of heart, or the easily annoyed...
but it's almost always active... which in turn ends up being a
continuous advertisement for the club...

New hams buy a new inexpensive VHF radio, hit scan, hear activity
there, find out it's our club, and then they look up our info, find we
have plenty of other repeaters also... and join.

Whether everyone likes it or not, that machine attracts all the
newbies.  And we work hard to foster a welcoming attitude (even
slowing down the speed of the discussion, and the  doubling... LOL...)
when we hear a new voice or callsign.  In fact, as club President I
monitor over there almost all the time -- just to break in and welcome
newbies.  Because that's where they are...

We also go out of our way to send a paper letter of welcome to every
new person we hear.  I can't take any credit for that part -- we have
a couple of GREAT volunteers in our club that handle that.

> 3) What can be done to generate renewed interest?

It's all about content... if you don

[Repeater-Builder] Re: 220 repeater receiver recommendations?

2007-02-22 Thread Ken Harrison
Thanks for the recommendation, Don.  Though I'm sure a MastrII would
be a great conversion for 220, we (in the group sense) want to try to
save some of our money to get a remote base setup going on our
repeater, too.   Our small savings would be wiped out to replace the
entire repeater, in spite of it being handy to have a complete spare
should there be a problem in the future.

Thanks,
Ken

--- In Repeater-Builder@yahoogroups.com, "Don KA9QJG" <[EMAIL PROTECTED]> wrote:
>
> Ken first of All I noticed You stated Our group, so I would assume
You have
> others kicking in to the Cost, I do not and I had Scott build Me up
a 220
> Repeater System, He did it in the process of Building a house and
Moving All
> I had to do was Program the Controller, Hook up the Amp, Power Supply
> Duplexers, and Ant, I have never had any Problems for over a Yr.



RE: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Barry C'
In my part of the world the base F call additions (and dropping of code)  , 
thats a very base ticket has resulted in a decent amount of activity and 
many of them upgrade to more power etc quickly , the dropping of code was a 
good idea because of the vhf restricteds accessing HF although some stick in 
the muds decry these advances it does improve activity , specific control is 
required and the 10 watts max tends to make these calls learn about qrp and 
making the most which I belive is a good way to enter radio .


>From: "Tony L." <[EMAIL PROTECTED]>
>Reply-To: Repeater-Builder@yahoogroups.com
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In 
>My Area
>Date: Thu, 22 Feb 2007 19:36:50 -
>
>The number of active ham repeaters in my area is way, way down in
>comparison to levels of 10 years ago.  It isn't uncommon to monitor a
>repeater frequency and hear no traffic for weeks.  Some clubs &
>individuals have just walked away from coordinated pairs.
>
>However, there are a few repeaters that have remained active, although
>certainly not to the extent they were in the past.  Interestingly, even
>though traffic is way down, there's still a waiting list in my area for
>coordinated pairs on all bands.
>
>Questions:
>
>1) Has there been a decline in traffic and the number of active
>repeaters in your area?
>
>2) If so, what do you feel the primary cause is?
>
>3) What can be done to generate renewed interest?
>
>
>

_
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Re: [Repeater-Builder] Re: Band Pass Duplexer Tuning

2007-02-22 Thread Nate Duehr
On 2/22/07, fxbuilder <[EMAIL PROTECTED]> wrote:
> I didn't have a load on the 3rd port when I tuned it.  I only have 1
> dummy load.  I can add an antenna to the 3rd port though I know that
> would less than ideal but better than nothing I suppose.  I have found
> some schematics for the pads and will be working on that this weekend.
> On a side note anyone know what the sensitivity should be on my uhf
> Mitrek when it is tuned correctly?  A low level but noisy signal seems
> to break squelch at .5mv (assuming I'm reading my old tube Navy
> generator correctly) and full quiet seems to be around 5mv.  Is this
> close to what it should be? It just doesn't seem to have "great ears".
>  Could be the nearby hills are just heavily blocking the antenna.
> Finding a good location that doesn't cost my first born is tough in
> this area.
> Craig

I'm not a "Motorola guy", so I have no idea what the factory spec of
the Mitrek receiver sensitivity is... but...

For repeater service using older radios, it's pretty common to need a
pre-amp to get maximum receiver performance.  But your original posts
were that you were tuning a small flat-pack style duplexer for this
project -- it may simply not have enough rejection.

Are you doing the sensitivity tests with the transmitter on or off?
You could be fighting good old fashioned desense.

A couple of the articles here in the RB site might be useful:

http://www.repeater-builder.com/antenna/deaf.html

(The link to Remec/Wacom in that article goes to someone else now...
since Wacom was acquired... and the link goes to a redirect that leads
to a company in Lynchburg who does other types of filters, looks
like...)

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

( I disagree with a statement in this article... "If you have the
ability you can probably construct a preamp that will more closely
suit your needs than can be found commercially."  -- Chip Angle at
AngleLinear gets rave reviews from many repeater owner/operators, and
a lot of us use Advanced Receiver Research's pre-amps without undue
headaches... which are both commercial products.  They both suit a lot
of people's needs!  GRIN... )

I'm also not quite sure about this statement talking about using the
pre-amp after the duplexer and before the receiver... :

"Again, since we are not making up for a great deal of loss, we do not
need a great deal of gain.  This example works great in UHF systems
but likely shouldn't be tried on 2 meters."

Off the top of my head, I can think of more than five VHF systems here
locally that do this with fine results...?  Different clubs, different
techs.  Some have bandpass filtering, some don't...   Kevin might
explain what he was thinking there...?

But anyway... check for desense before anything ... if you have that
going on, making the receiver hear better will only make it worse.
(GRIN)

Nate WY0X


[Repeater-Builder] Re: Antenna Gain Specification - dBi versus dBd

2007-02-22 Thread Coy Hilton
I justy rebuilt a Diamond X500 not much there but copper wire. The 
problem with it, was, in the "loading coil" the base has a pair of 
caps tacked to the base coil. They are crappy solder joints and one 
lead of one cap just poped off the solder where it was tacked on.  


--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
> At 2/20/2007 05:39, you wrote:
> 
> >Could never understand why a Diamond long 18 ft dual band antenna 
has
> >about 8 dbd on VHF/11 dbd on UHF when a commerical antenna like 
the
> >Super Station Master or DB224 has 6 db.  Think the commerical 
people
> >know why, not, hi.
> 
> The Diamond specs are actually dBi, not dBd.  If they claim dBd, 
it's false 
> advertising.  Someday if I find one torn apart I'll build a model 
of it in 
> NEC-Win to prove it.
> 
> 
> 
> >QST for a long time refused to print gain specs in the ads for 
they
> >knew most was smoke.
> 
> Yes, but not publishing gain specs for antennas is sort of like 
not 
> publishing power ratings for amplifiers or amperage ratings for 12 
V power 
> supplies.
> 
> Bob NO6B
>




[Repeater-Builder] Re: 220 repeater receiver recommendations?

2007-02-22 Thread Ken Harrison
Thanks Skip.  Yes, I figured I might get a few different opinions.  I
certainly don't want to start a war, though!  :-)

Regarding 3rd v. 5th overtone, no real reasoning there.  Spectrum's
current receiver is a 5th overtone.  Our old one is a 3rd.  (New
crystal needed...)

You're a little tuff to pin down on an opinion, though.  I see you
like Hamtronics well enough to try one of their synthesized models,
you have a Hi Pro that keeps on playing like the energizer bunny, and
you like Spectrum's audio interface.  Haa.  Are you a politician by
chance?  (snicker)

I'm not totally satisfied with customer service from Spectrum.  That
would be one of the things that would hold me back from them.  We
purchased another repeater some time back and it was apparently
shipped with the wrong manual.  We tried to make heads or tails of
what we saw vs. what the schematic said was there and there were
discrepencies.  We had to make a few calls back to them and they
threatened to start charging us for phone time or we should just send
it back as we "obviously didn't know anything about repeaters." 
Shortly thereafter, they sent the CORRECT manual and schematic to us,
sans apology.  The attitude presented was problematic, to be sure.

Anyway, we'll look at all the companies presented with an open mind
and try to forget the bad incident we had with one of them.

Thanks-
Ken

--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote:
>
> Hi Ken, 
> 
> You're goint to get a lot of opinions regarding the quality of 
> various receivers and a mention by a lot of "sold customers" to 
> seriously consider using a converted commercial radio... the popular 
> conversion being something like a GE or Motorola Radio. 
> 
> I'm not sure if I "get" the reason why you worry about using a 3rd 
> or 5th overtone crystal in your receiver. Are you experiencing some 
> issue with the injection scheme or an image from the adjacent TV 
> Channel allocation? 
> 
> We've just had an Icom IC-RP2210 repeater receiver die and parts are 
> no longer available. I've ordered a replacement R302-6 receiver from 
> Hamtronics to drop into the box. I've heard a few negative reports 
> about the Hamtronics Synth Equipment in the last few months but I'm 
> willing to try one for myself.  Since the repeater transmitter is 
> still synth I wanted to allow the receiver to be reprogrammed when 
> and where desired. I'm well willing to trust trying a Hamtronics 
> Receiver because I've never really had a "bad unit" from them. Not 
> only have I built and used a lot of Hamtronics gear.. but I've been 
> using Jerry's vhf projects since the 1970's.  My only beef would be 
> to tell Jerry to get off the $%*(@ speaker phone when I call him. 
> 
> I bought a Hi Pro 220 repeater transmitter and receiver about two
> years back and it just keeps on playing rock solid. My only issue 
> might be the whacky way Maggiore (and a lot other brands) treat (or 
> doesn't treat) the receiver repeat audio. Seems like Spectrum has 
> one of the better repeater receiver audio interface circuits. 
> 
> So read what other have to report... ask a lot more questions and 
> get out your check book. 
> 
> cheers, 
> skipp 
> 
> skipp025 at yahoo.com 



Re: [Repeater-Builder] Whiskers

2007-02-22 Thread Nate Duehr
On 2/21/07, Kevin Custer <[EMAIL PROTECTED]> wrote:
> If you hit it hard enough, it would have fixed itself without taking it
> apart.  Nate knows how hard you have to smack it to break the whiskers
> off, don't you Nate?  

Actually I've never done it myself... just knew it was an option --
one of those "crap, the repeater's down and I don't have time to work
on this" options.  I hate those.  (GRIN)

I think if I were presented with info that someone had done it to one
of our systems I would start immediately into the cussing stage... but
not at that person, more that I'd know we would have to find another
VHF and go swap it... and there's a LOT of screws in a station to take
out to do that swap... and I *always* seem to lose at least one of
them...

The swap is easy -- if you show up with a receiver already aligned...
but if you don't have extra ICOM's with the crystals already in them
you usually can only do a rough alignment on with whatever closest
crystal set you have.

Once you're done keeping track of all the darn screws in a dark room
at a site, dropping at least three of them on the floor and hunting
for them... then after getting it all put back together -- then you
still have to align the darn thing...

In all, a multi-hour project, that's still worth doing... just to get
the stupid casting out of there that's causing all the grief...

Heck if you bang on the casting to "fix" it, you're probably going to
whack the thing hard enough that you might have to go back through the
helical alignment anyway.

Since all of our repeater sites are quite a drive from home
(mountains), the whole prospect sounds not fun, no matter how you
slice it.

I visited a friend in Indianapolis last year after Dayton and he said,
"Want to go to the repeater site?'  He wondered why my initial
reaction was "Huh?"... of course, the repeater site is on a huge tower
only 3 miles from his house... you drive over, open the gate, open the
door and do whatever you need to.  Must be NICE!

I'd have our "re-connectorize everything" project crossed off my list
if our sites were that easily accessible... a couple of hours over a
couple of months of Saturdays... and it'd all be done...

Digital photos are a lifesaver for us, when we remember to shoot
them... now was that a male or a female DB-9 on that  What kind of
clamps are holding that antenna again???

Ahh... right here in the photos...

Of course, on my last three site trips to one of our sites, I either
couldn't find or didn't take the [EMAIL PROTECTED](^#@ digital camera... and as 
I'm
pulling out of the site in the Jeep I remember... and the cussing
starts again...

So ... Fred's right... all good projects start with cussing.  :-)

Nate WY0X


RE: [Repeater-Builder] 220 repeater receiver recommendations?

2007-02-22 Thread Don KA9QJG
Ken first of All I noticed You stated Our group, so I would assume You have
others kicking in to the Cost, I do not and I had Scott build Me up a 220
Repeater System, He did it in the process of Building a house and Moving All
I had to do was Program the Controller, Hook up the Amp, Power Supply
Duplexers, and Ant, I have never had any Problems for over a Yr.   I live in
N/W Ind and get gets Cold Below Zero and the Repeater is in a non heated
area, Last Mo. it started sounding a little Distorted on weak Signals, I E-
Mailed Scott and Explained the Problem, and He told Me to Adjust the Receive
Element it had Drifted and Finally settles Down, I set it back on Freq it
was Low now Everything is Working Great, So Not only do You get a Great
Product But alsoSupport after the sale, If I had a Club paying dues I
would have another one built and if Something went Wrong just Switch them
out ,  No down time You can have it custom built the way You want it and I
wanted all kind of  unnecessary stuff S-Meter,  Disc Meter Lights,   Etc.
and was told that was just more stuff to go Wrong keep it Simple .



  More info here



http://www.repeater-builder.com/custombuilt/index.html



Good Luck



Happy Repeater Building



Don KA9QJG


RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Bob Dengler
At 2/22/2007 08:17 AM, you wrote:
>Are not radio waves and light waves both electromagnetic waves?
>Are not all electromagnetic waves made up of photons?

Yes & Yes.

Bob NO6B




[Repeater-Builder] Re: 220 repeater receiver recommendations?

2007-02-22 Thread skipp025
Hi Ken, 

You're goint to get a lot of opinions regarding the quality of 
various receivers and a mention by a lot of "sold customers" to 
seriously consider using a converted commercial radio... the popular 
conversion being something like a GE or Motorola Radio. 

I'm not sure if I "get" the reason why you worry about using a 3rd 
or 5th overtone crystal in your receiver. Are you experiencing some 
issue with the injection scheme or an image from the adjacent TV 
Channel allocation? 

We've just had an Icom IC-RP2210 repeater receiver die and parts are 
no longer available. I've ordered a replacement R302-6 receiver from 
Hamtronics to drop into the box. I've heard a few negative reports 
about the Hamtronics Synth Equipment in the last few months but I'm 
willing to try one for myself.  Since the repeater transmitter is 
still synth I wanted to allow the receiver to be reprogrammed when 
and where desired. I'm well willing to trust trying a Hamtronics 
Receiver because I've never really had a "bad unit" from them. Not 
only have I built and used a lot of Hamtronics gear.. but I've been 
using Jerry's vhf projects since the 1970's.  My only beef would be 
to tell Jerry to get off the $%*(@ speaker phone when I call him. 

I bought a Hi Pro 220 repeater transmitter and receiver about two
years back and it just keeps on playing rock solid. My only issue 
might be the whacky way Maggiore (and a lot other brands) treat (or 
doesn't treat) the receiver repeat audio. Seems like Spectrum has 
one of the better repeater receiver audio interface circuits. 

So read what other have to report... ask a lot more questions and 
get out your check book. 

cheers, 
skipp 

skipp025 at yahoo.com 


> "Ken Harrison" <[EMAIL PROTECTED]> wrote:
>
> Our group is in need of replacing the receiver on our 220 box and I
> wanted to solicit some opinions from the group.
> 
> Our current receiver is a Spectrum using 3rd overtone crystals.  We
> are looking at the following:
> 
> 1. Spectrum receiver using 5th overtone crystals.
> 
> 2. Hamtronics R302 Synthesized receiver.
>http://www.hamtronics.com/r302.htm
> 
> 3. Hamtronics R100 crystal receiver.
>http://www.hamtronics.com/r100.htm
> 
> 4. Hi-Pro R4V
>http://www.hiprorepeaters.com/Receivers.htm
> 
> What are you using and are you happy with it?  Would you buy any
> particular one again?  Why or why not.
> 
> Thanks a bunch!
> 
> Ken  KE6N
>



[Repeater-Builder] Circulators FS

2007-02-22 Thread n9mep
(4)  M/A Com VHF Single Circulators  (153.00 Mhz range) Mod#  XH-419-6Q1T
$25.00 Ea.
 
(1)  M/A Com UHF Triple Circulator   Mod#  G-4005   $25.00
 
(1)  M/A VHF Combiner  Mod# H-4103-2
 
Plus shipping from 60134
 
Contact me off list if interested at   N9MEP at AOL dot Com
 
Thanks
 
Gerry
** AOL now offers free 
email to everyone.  Find out more about what's free from AOL at 
http://www.aol.com.


RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Gary Schafer
Yes Steve, paint part of the antenna black and another part shiny and you
have a repeater. :>)

As I understand (very little) Maxwell's wave theory is ok but doesn't tell
the whole story. The waves are made up of particles. Kind of dual mode so
Planck's theory fits too.

73
Gary  K4FMX

> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> [EMAIL PROTECTED] On Behalf Of Steve Bosshard (NU5D)
> Sent: Thursday, February 22, 2007 12:15 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and
> Salmon Colors)
> 
> I posted the comment about shiny antennas totally tongue in cheek and not
> to
> be taken seriously.  A coating of aluminum oxide should have practically
> no
> effect on antenna performance.  As far as particles vs waves, seems like
> some theory fits particles and other theory fits wave theory (Planks and
> Maxwells?) - I can get more info from our oldest son, AD5RN if needed - he
> is studying that kind of stuff down at Texas A&M..  Steve NU5D
> 
> 
> 
> 
> 
> 
> Yahoo! Groups - Join or create groups, clubs, forums & communities.
> Links
> 
> 
> 
> 




RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Gary Schafer
The first page of your reference tells the story;

"The word "light" is defined here as "electromagnetic radiation of any
wavelength"; thus, X-rays, gamma rays, ultraviolet light, infrared light,
microwaves, radio waves, and visible light are all forms of light."

"In modern physics, the photon is the elementary particle responsible for
electromagnetic phenomena. It mediates electromagnetic interactions and
makes up all forms of light."

73
Gary  K4FMX


> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> [EMAIL PROTECTED] On Behalf Of KD5SFA
> Sent: Thursday, February 22, 2007 12:04 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and
> Salmon Colors)
> 
> yes and no.
> 
> Here is more info that you probably wanted to know...
> 
> http://en.wikipedia.org/wiki/Photon
> 
> 73,
> Jon
> KD5SFA
> 
> 
> 
> 
> 
> -Original Message-
> >From: Gary Schafer <[EMAIL PROTECTED]>
> >Sent: Feb 22, 2007 10:17 AM
> >To: Repeater-Builder@yahoogroups.com
> >Subject: RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and
> Salmon Colors)
> >
> >Are not radio waves and light waves both electromagnetic waves?
> >Are not all electromagnetic waves made up of photons?
> >
> >73
> >Gary  K4FMX
> >
> >> -Original Message-
> >> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> >> [EMAIL PROTECTED] On Behalf Of W8MIA
> >> Sent: Thursday, February 22, 2007 1:29 AM
> >> To: Repeater-Builder@yahoogroups.com
> >> Subject: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and
> Salmon
> >> Colors)
> >>
> >> There is one SMALL problem with your Hypothesis. RF is transmitted by
> >> Electrons. Light is transmitted by Photons. Science has a rather good
> >> handle on Electrons but Photons are still not fully understood!!!
> >>
> >> Apples & Oranges!!
> >>
> >> August
> >> W8MIA
> >> 
> >>
> >>
> >> -- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]>
> wrote:
> >> >
> >> >
> >> > The advantage of a dark antennas is how snow and ice might melt
> >> > off it faster... and most of all how you can't easily see a black
> >> > mobile whip on your car so it tends not to get tampered with as
> >> > much.
> >> >
> >> > s.
> >> >
> >> > > Roger Grady  wrote:
> >> > >
> >> > > At 12:39 PM 2/21/2007, Steve Bosshard \(NU5D\) wrote:
> >> > >
> >> > > >Regarding a clean and shiny antenna, we had a discussion at
> >> coffee. The
> >> > > >preposition was that radio waves and light have many
> >> similarities, ie.,
> >> > > >wavelength, reflection, Fresnel behavior, and so forth. Using
> these
> >> > > >similarities, a mirror reflects light, and a dark surface absorbs
> >> > light,
> >> > > >so, wouldn't a shiny antenna reflect incoming
> >> > signals while
> >> > > >a dark colored antenna absorbs signals? This may only apply to
> >> > receiving
> >> > > >antennas - hope I can get this idea to market before the April 1
> >> > edition of
> >> > > >QST..  ..  .. de nu5d
> >> > >
> >> > > Cute idea. However... How do you know aluminum that's shiny or
> >> black at
> >> > > visible light frequencies is still shiny or black at radio
> >> frequencies?
> >> > > Maybe RF black is visible day-glo orange, or pea-soup green. Or
> >> > maybe it
> >> > > would absorb light so well as to be invisible. I think this would
> >> > make a
> >> > > good April 1 article. I haven't written one for our repeater club
> >> > > newsletter for a few years, maybe it's time for another. Assuming
> >> > you don't
> >> > > mind if I borrow your premise.
> >> > >
> >> > > As I think about it a vague sense of deja-vu is forming. Maybe
> there
> >> > was an
> >> > > April Fool's article years ago somewhere about invisible antennas?
> >> > >
> >> > > Roger Grady  K9OPO
> >> > >
> >> >
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> Yahoo! Groups - Join or create groups, clubs, forums & communities.
> >> Links
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups - Join or create groups, clubs, forums & communities. Links
> >
> >
> >
> 
> 
> 
> 
> 
> 
> Yahoo! Groups - Join or create groups, clubs, forums & communities.
> Links
> 
> 
> 
> 




[Repeater-Builder] 220 repeater receiver recommendations?

2007-02-22 Thread Ken Harrison
Our group is in need of replacing the receiver on our 220 box and I
wanted to solicit some opinions from the group.

Our current receiver is a Spectrum using 3rd overtone crystals.  We
are looking at the following:

1. Spectrum receiver using 5th overtone crystals.

2. Hamtronics R302 Synthesized receiver.
   http://www.hamtronics.com/r302.htm

3. Hamtronics R100 crystal receiver.
   http://www.hamtronics.com/r100.htm

4. Hi-Pro R4V
   http://www.hiprorepeaters.com/Receivers.htm

What are you using and are you happy with it?  Would you buy any
particular one again?  Why or why not.

Thanks a bunch!

Ken  KE6N



Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread DaveH
Hi,
There has been no decline in repeater use here. As a matter of fact it's 
getting busier than ever. After next week I suspect there will be even more 
traffic. I hold a "TECH NET" on our local machine one a week.  It's usually 
handled as a "round table". works extremely well.
73
David R. Henry LME
Licensed Master Electrician
Amateur Radio  W2DRH
Member ARRL
Accredited Instructor

- Original Message - 
From: "Tony L." <[EMAIL PROTECTED]>
To: 
Sent: Thursday, February 22, 2007 2:36 PM
Subject: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In 
My Area


> The number of active ham repeaters in my area is way, way down in
> comparison to levels of 10 years ago.  It isn't uncommon to monitor a
> repeater frequency and hear no traffic for weeks.  Some clubs &
> individuals have just walked away from coordinated pairs.
>
> However, there are a few repeaters that have remained active, although
> certainly not to the extent they were in the past.  Interestingly, even
> though traffic is way down, there's still a waiting list in my area for
> coordinated pairs on all bands.
>
> Questions:
>
> 1) Has there been a decline in traffic and the number of active
> repeaters in your area?
>
> 2) If so, what do you feel the primary cause is?
>
> 3) What can be done to generate renewed interest?
>
>
>
>
>
>
>
>
> Yahoo! Groups - Join or create groups, clubs, forums & communities. 
> Links
>
>
>
>
> 




Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Jack Taylor
1) The number of repeaters in our area has increased slightly but the activity 
on any of them
is way-way down,  One local put a recorder on the output of one popular 
repeater channel
and found over a 24 hour period, it was in use less than 1% of the time.  Even 
the newer
IRLP and EchoLink repeaters attract very little interest.

2) Suspect the primary cause of the decline is due to alternative means of 
communication
being available.  Without a doubt, cell phones provide private communications 
world-wide
just about everywhere and whenever and, at relatively inexpensive prices.  
Multi-channels
of TV with multi-content delivered via cable and satellite attract attention 
during the evening hours.
Ditto with satellite delivered multi-content radio channels available when 
mobile.  Then too of course,
are the ham forums on the internet such as this one, that competes for our time 
on the radio.

3) IMO this trend will not reverse but gradually continue.  A possible parallel 
would be packet radio.
In the beginning just as it was with repeaters, there was a rush to install 
packet network nodes
over most of the US.  Clubs and individuals were proud to be involved with the 
'digital revolution.
User interest waned and as time passed the network deteriated.  Today there are 
very few
"live" users.

73 de Jack -  N7OO

  - Original Message - 
  From: Tony L. 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Thursday, February 22, 2007 12:36 PM
  Subject: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In 
My Area


  The number of active ham repeaters in my area is way, way down in 
  comparison to levels of 10 years ago. It isn't uncommon to monitor a 
  repeater frequency and hear no traffic for weeks. Some clubs & 
  individuals have just walked away from coordinated pairs.

  However, there are a few repeaters that have remained active, although 
  certainly not to the extent they were in the past. Interestingly, even 
  though traffic is way down, there's still a waiting list in my area for 
  coordinated pairs on all bands.

  Questions:

  1) Has there been a decline in traffic and the number of active 
  repeaters in your area?

  2) If so, what do you feel the primary cause is?

  3) What can be done to generate renewed interest? 



   


Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Tedd Doda
On Thu, 22 Feb 2007 19:36:50 -, Tony L. wrote:

>3) What can be done to generate renewed interest? 

Everyone else gave good answers for #1 and #2.

As for #3, link as many repeaters as you can. We have 4
UHF machines linked 24/7 (see link below) and also have
Echolink and IRLP available. What a blast! The uptime for
the system would easily exceed all the individual repeaters
put together. Why? Larger audience. The chances of putting
out your call and having someone actually there to reply
is much greater.

Just my $0.02 worth...

Tedd Doda, VE3TJD
Lazer Audio and Electronics
Baden, Ontario, Canada

www.ve3tjd.com (personal)
www.eraradio.ca (Linked repeater system)



[Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Ted Bleiman K9MDM - MDM Radio
this was inevitable. the hobby ages twice as fast
as new hams get licensed.even faster in some
areas. It stands to reason that sooner of later
activity on the bands will reach a point where
the FCC says we are not using the channels and
they take back the spectrum and sell it to
cellfones, data, or some other big money
interest. HAMS are not a big source of money the
government can tap for spectrum. Most wouldn't 
tony L
spend $5 to save the hobby they claim to
love.They will  spend hours and hours talking to
other hams who also wouldn't spend $5 to continue
it.
As the older population dies off there is no one
to take their place hence silence. It other words
the "Silence of the HAMS"...taint funny mcgee
220 should have been a lesson...unlearned...cb
was a lesson...unlearned...micorwave spectrum
that has been taken back or changed to a shared
basis of operation...we'll be back on 80 meters
AM if this keeps up. Got the idea
mdm ted
--- "Tony L." <[EMAIL PROTECTED]> wrote:


  Ted Bleiman K9MDM
  MDM  Radio" If its in stock...we've got it!"
P O Box 31353
Chicago, IL 60631-0353 
773.631.5130  fax 773.775.8096  
   
  web http://www.mdmradio.com - 
   email -  [EMAIL PROTECTED] <<< DIRECT ALL EMAIL 












 

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Everyone is raving about the all-new Yahoo! Mail beta.
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Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread cruising7388
 
In a message dated 2/22/2007 11:40:17 A.M. Pacific Standard Time,  
[EMAIL PROTECTED] writes:

The number of active ham repeaters in my area is way, way down in  
comparison to levels of 10 years ago. It isn't uncommon to monitor a  
repeater frequency and hear no traffic for weeks. Some clubs &  
individuals have just walked away from coordinated pairs.

However,  there are a few repeaters that have remained active, although 
certainly  not to the extent they were in the past. Interestingly, even 
though  traffic is way down, there's still a waiting list in my area for  
coordinated pairs on all bands.

Questions:

1) Has there been  a decline in traffic and the number of active 
repeaters in your  area?

2) If so, what do you feel the primary cause is?

3) What  can be done to generate renewed interest? 






1) Yes
 
2) Cellular phones, internet
 
3) Probably nothing short of natural or terrorist caused disaster that  
obliterates terrestial  communications.
 
The reason for the waiting list for coordinating pairs even in  the presence 
of declining repeater usage is because there is generally no  requirement for 
a repeater to maintain a threshold activity level after  coordination. 
Implementing such a requirement to retain coordination  would undoubtedly free 
up 
pairs, but man, it would get  ugly. 
** AOL now offers free 
email to everyone.  Find out more about what's free from AOL at 
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Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread [EMAIL PROTECTED]
I see the same thing even in the big cities - Los Angeles, San Francisco, 
Chicago, Seattle, Vancouver B.C., etc. As you tune across 2-Meters, 220 and 440 
MHz, most Repeaters are quiet, most of the time. You can often scan the entire 
band(s) from a clear location and never hear one signal.

With all of the high-quality retired commercial equipment, duplexers, linking 
equipment, etc. that has come available from government agencies (often for 
free) over the last 15-20 years as people move to frequency ranges like 
800-MHz, just about all VHF and UHF ham Repeater frequencies now have a 
Repeater coordinated to them in the bigger metro areas.  Homeland Security and 
local government agencies have made funds and radio sites available to many 
hams for their Repeater projects.

There appear to be just about as many Repeaters now as there are users to 
actually talk on them!

LJ





-Original Message-
>From: "Tony L." <[EMAIL PROTECTED]>
>Sent: Feb 22, 2007 11:36 AM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My 
>Area
>
>The number of active ham repeaters in my area is way, way down in 
>comparison to levels of 10 years ago.  It isn't uncommon to monitor a 
>repeater frequency and hear no traffic for weeks.  Some clubs & 
>individuals have just walked away from coordinated pairs.
>
>However, there are a few repeaters that have remained active, although 
>certainly not to the extent they were in the past.  Interestingly, even 
>though traffic is way down, there's still a waiting list in my area for 
>coordinated pairs on all bands.
>
>Questions:
>
>1) Has there been a decline in traffic and the number of active 
>repeaters in your area?
>
>2) If so, what do you feel the primary cause is?
>
>3) What can be done to generate renewed interest? 
>
>
>



Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Bob M.
Computers and the internet, cell phones, satellite
radio, iPods, and now the ease of getting your very
own "amateur" CB callsign, so you can chat with all
your good buddies.

I can guarantee that if the coordinating body starts
asking questions about all these idle repeaters,
they'll instantly become busy for a few weeks. No one
wants to give up their nice quite, private frequency
pair.

Bob M.
==
--- "Tony L." <[EMAIL PROTECTED]> wrote:

> The number of active ham repeaters in my area is
> way, way down in 
> comparison to levels of 10 years ago.  It isn't
> uncommon to monitor a 
> repeater frequency and hear no traffic for weeks. 
> Some clubs & 
> individuals have just walked away from coordinated
> pairs.
> 
> However, there are a few repeaters that have
> remained active, although 
> certainly not to the extent they were in the past. 
> Interestingly, even 
> though traffic is way down, there's still a waiting
> list in my area for 
> coordinated pairs on all bands.
> 
> Questions:
> 
> 1) Has there been a decline in traffic and the
> number of active 
> repeaters in your area?
> 
> 2) If so, what do you feel the primary cause is?
> 
> 3) What can be done to generate renewed interest?


 

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See all the new 2007 cars at Yahoo! Autos.
http://autos.yahoo.com/new_cars.html 


Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Steve Bosshard \(NU5D\)
Same here in Central Texas - most repeaters dead - 2M, 440 as well - nothing 
to talk about.  We do have a Monday night 2M net that garners 10 to 15 
checkin's from a population of 54 K in the primary city and 248K in the 
repeater coverage area (Bell County of Texas).  Only activity is occasional 
QSO's on the Club repeater and weather spotting on the ARES repeater - not 
much else.  sb 



Re: [Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread mch
1. Yes. 
2. Internet/Cellphones 
3. I have no idea. Wish I did. More disasters that prove the worth would
help, but I certainly don't want to promote that.

Joe M.

Tony L. wrote:
> 
> The number of active ham repeaters in my area is way, way down in
> comparison to levels of 10 years ago.  It isn't uncommon to monitor a
> repeater frequency and hear no traffic for weeks.  Some clubs &
> individuals have just walked away from coordinated pairs.
> 
> However, there are a few repeaters that have remained active, although
> certainly not to the extent they were in the past.  Interestingly, even
> though traffic is way down, there's still a waiting list in my area for
> coordinated pairs on all bands.
> 
> Questions:
> 
> 1) Has there been a decline in traffic and the number of active
> repeaters in your area?
> 
> 2) If so, what do you feel the primary cause is?
> 
> 3) What can be done to generate renewed interest?



[Repeater-Builder] OT- Activity Level On Ham Repeaters Way Down In My Area

2007-02-22 Thread Tony L.
The number of active ham repeaters in my area is way, way down in 
comparison to levels of 10 years ago.  It isn't uncommon to monitor a 
repeater frequency and hear no traffic for weeks.  Some clubs & 
individuals have just walked away from coordinated pairs.

However, there are a few repeaters that have remained active, although 
certainly not to the extent they were in the past.  Interestingly, even 
though traffic is way down, there's still a waiting list in my area for 
coordinated pairs on all bands.

Questions:

1) Has there been a decline in traffic and the number of active 
repeaters in your area?

2) If so, what do you feel the primary cause is?

3) What can be done to generate renewed interest? 





Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters

2007-02-22 Thread Rod Shaner
Whoa there pardner! Useless? Don't know 'bout 'dat. It keeps the
local electrical co-op very happy, even at idle current!! hi.
Neil? Jump in anytime! Happy to have the input.

R.

On Wed, 21 Feb 2007 22:06:53 -0500, Ken Arck <[EMAIL PROTECTED]> wrote:

> At 06:38 PM 2/18/2007, you wrote:
>
>> Hello WA6KLA???
>>
>> It seems like this would be a good time for Neil Mckie to jump in & give
>> advice here. No one knows more about the old useless Moto gear!
>
> <---I was wondering what happened to Neil myself. I haven't seen
> (heard from) him since December
>
> Ken
>
>
> --
> President and CTO - Arcom Communications
> Makers of the world famous RC210 Repeater Controller and accessories.
> http://www.arcomcontrollers.com/
> Authorized Dealers for Kenwood and Telewave and
> we offer complete repeater packages!
> AH6LE/R - IRLP Node 3000
> http://www.irlp.net
>



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Re: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Steve Bosshard \(NU5D\)
I posted the comment about shiny antennas totally tongue in cheek and not to 
be taken seriously.  A coating of aluminum oxide should have practically no 
effect on antenna performance.  As far as particles vs waves, seems like 
some theory fits particles and other theory fits wave theory (Planks and 
Maxwells?) - I can get more info from our oldest son, AD5RN if needed - he 
is studying that kind of stuff down at Texas A&M..  Steve NU5D 



RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread KD5SFA
yes and no.

Here is more info that you probably wanted to know...

http://en.wikipedia.org/wiki/Photon

73,
Jon
KD5SFA





-Original Message-
>From: Gary Schafer <[EMAIL PROTECTED]>
>Sent: Feb 22, 2007 10:17 AM
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon 
>Colors)
>
>Are not radio waves and light waves both electromagnetic waves? 
>Are not all electromagnetic waves made up of photons?
>
>73
>Gary  K4FMX
>
>> -Original Message-
>> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
>> [EMAIL PROTECTED] On Behalf Of W8MIA
>> Sent: Thursday, February 22, 2007 1:29 AM
>> To: Repeater-Builder@yahoogroups.com
>> Subject: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon
>> Colors)
>> 
>> There is one SMALL problem with your Hypothesis. RF is transmitted by
>> Electrons. Light is transmitted by Photons. Science has a rather good
>> handle on Electrons but Photons are still not fully understood!!!
>> 
>> Apples & Oranges!!
>> 
>> August
>> W8MIA
>> 
>> 
>> 
>> -- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote:
>> >
>> >
>> > The advantage of a dark antennas is how snow and ice might melt
>> > off it faster... and most of all how you can't easily see a black
>> > mobile whip on your car so it tends not to get tampered with as
>> > much.
>> >
>> > s.
>> >
>> > > Roger Grady  wrote:
>> > >
>> > > At 12:39 PM 2/21/2007, Steve Bosshard \(NU5D\) wrote:
>> > >
>> > > >Regarding a clean and shiny antenna, we had a discussion at
>> coffee. The
>> > > >preposition was that radio waves and light have many
>> similarities, ie.,
>> > > >wavelength, reflection, Fresnel behavior, and so forth. Using these
>> > > >similarities, a mirror reflects light, and a dark surface absorbs
>> > light,
>> > > >so, wouldn't a shiny antenna reflect incoming
>> > signals while
>> > > >a dark colored antenna absorbs signals? This may only apply to
>> > receiving
>> > > >antennas - hope I can get this idea to market before the April 1
>> > edition of
>> > > >QST..  ..  .. de nu5d
>> > >
>> > > Cute idea. However... How do you know aluminum that's shiny or
>> black at
>> > > visible light frequencies is still shiny or black at radio
>> frequencies?
>> > > Maybe RF black is visible day-glo orange, or pea-soup green. Or
>> > maybe it
>> > > would absorb light so well as to be invisible. I think this would
>> > make a
>> > > good April 1 article. I haven't written one for our repeater club
>> > > newsletter for a few years, maybe it's time for another. Assuming
>> > you don't
>> > > mind if I borrow your premise.
>> > >
>> > > As I think about it a vague sense of deja-vu is forming. Maybe there
>> > was an
>> > > April Fool's article years ago somewhere about invisible antennas?
>> > >
>> > > Roger Grady  K9OPO
>> > >
>> >
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Yahoo! Groups - Join or create groups, clubs, forums & communities.
>> Links
>> 
>> 
>> 
>> 
>
>
>
>
>
>
> 
>Yahoo! Groups - Join or create groups, clubs, forums & communities. Links
>
>
>



RE: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Gary Schafer
Are not radio waves and light waves both electromagnetic waves? 
Are not all electromagnetic waves made up of photons?

73
Gary  K4FMX

> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> [EMAIL PROTECTED] On Behalf Of W8MIA
> Sent: Thursday, February 22, 2007 1:29 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon
> Colors)
> 
> There is one SMALL problem with your Hypothesis. RF is transmitted by
> Electrons. Light is transmitted by Photons. Science has a rather good
> handle on Electrons but Photons are still not fully understood!!!
> 
> Apples & Oranges!!
> 
> August
> W8MIA
> 
> 
> 
> -- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote:
> >
> >
> > The advantage of a dark antennas is how snow and ice might melt
> > off it faster... and most of all how you can't easily see a black
> > mobile whip on your car so it tends not to get tampered with as
> > much.
> >
> > s.
> >
> > > Roger Grady  wrote:
> > >
> > > At 12:39 PM 2/21/2007, Steve Bosshard \(NU5D\) wrote:
> > >
> > > >Regarding a clean and shiny antenna, we had a discussion at
> coffee. The
> > > >preposition was that radio waves and light have many
> similarities, ie.,
> > > >wavelength, reflection, Fresnel behavior, and so forth. Using these
> > > >similarities, a mirror reflects light, and a dark surface absorbs
> > light,
> > > >so, wouldn't a shiny antenna reflect incoming
> > signals while
> > > >a dark colored antenna absorbs signals? This may only apply to
> > receiving
> > > >antennas - hope I can get this idea to market before the April 1
> > edition of
> > > >QST..  ..  .. de nu5d
> > >
> > > Cute idea. However... How do you know aluminum that's shiny or
> black at
> > > visible light frequencies is still shiny or black at radio
> frequencies?
> > > Maybe RF black is visible day-glo orange, or pea-soup green. Or
> > maybe it
> > > would absorb light so well as to be invisible. I think this would
> > make a
> > > good April 1 article. I haven't written one for our repeater club
> > > newsletter for a few years, maybe it's time for another. Assuming
> > you don't
> > > mind if I borrow your premise.
> > >
> > > As I think about it a vague sense of deja-vu is forming. Maybe there
> > was an
> > > April Fool's article years ago somewhere about invisible antennas?
> > >
> > > Roger Grady  K9OPO
> > >
> >
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups - Join or create groups, clubs, forums & communities.
> Links
> 
> 
> 
> 




[Repeater-Builder] Cable

2007-02-22 Thread K4GLP
Repeater BuilderAnyone know of a source for a GOOD VXR-5000U programming cable?

Or maybe have a spare you will depart with? ';o)

George


[Repeater-Builder] FS Rack mounted RCA power supplies

2007-02-22 Thread Ron Wicker
I am trying to clean out some of my equipment.  I have three rack mounted
power supplies.  These are TAC 400 rack mounted  12 volt supplies at
approximately 20 amps.  They are linear supplies and heavy.  Prefer pickup
in Houston area.  I can supply pictures on request.  $50.00 each.






 
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[Repeater-Builder] Re: Band Pass Duplexer Tuning

2007-02-22 Thread fxbuilder
I didn't have a load on the 3rd port when I tuned it.  I only have 1
dummy load.  I can add an antenna to the 3rd port though I know that
would less than ideal but better than nothing I suppose.  I have found
some schematics for the pads and will be working on that this weekend.
On a side note anyone know what the sensitivity should be on my uhf
Mitrek when it is tuned correctly?  A low level but noisy signal seems
to break squelch at .5mv (assuming I'm reading my old tube Navy
generator correctly) and full quiet seems to be around 5mv.  Is this
close to what it should be? It just doesn't seem to have "great ears".
 Could be the nearby hills are just heavily blocking the antenna.
Finding a good location that doesn't cost my first born is tough in
this area.
Craig


--- In Repeater-Builder@yahoogroups.com, "Gary Schafer"
<[EMAIL PROTECTED]> wrote:
>
> 
> 
> Like Ken said; all 3 ports need to be terminated in 50 ohms when
tuning. A
> signal generator is usually fairly close to 50 ohms, a receiver may
or may
> not be, usually not. The unused port at the time needs a 50 ohm load. 
> The best way is to use a 6 db pad on gen and rec sides while tuning.
> 
> But what may be the worst problem is you may be trying to use it too far
> from the design frequency. You have no way to tune the loops on
those units.
> Also be sure you haven't reversed the tx and rx frequencies as the
loops are
> tuned internally to pass a frequency only on one side of the notch.
> 
> 73
> Gary  K4FMX
> 
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> > [EMAIL PROTECTED] On Behalf Of fxbuilder
> > Sent: Tuesday, February 20, 2007 9:49 AM
> > To: Repeater-Builder@yahoogroups.com
> > Subject: [Repeater-Builder] Re: Band Pass Duplexer Tuning
> > 
> > Ok... So I've tuned this duplexer as a notch device.  Put a 2 watt
> > handheld into a dummy load and watt meter (not in that order mind you)
> > and it seems to reject the corresponding frequencies.  My question now
> > is... Why did my swr jump from 1:1.3 to 1:3.  Do I need to re-tweek
> > it?  Also I'm noticing a huge power loss when measured before and
> > after the duplexer. Talking 30 watts down to below 10 watts. Any
> > suggestions. Perhaps it is time to check the cables etc?  Thanks for
> > all the help in the past.
> > Craig
> > 
> > 
> > 
> > 
> > 
> > --- In Repeater-Builder@yahoogroups.com, "Gary Schafer"
> >  wrote:
> > >
> > > Lots of the small mobile duplexers (notch type) have fixed
> > capacitors inside
> > > and you can only adjust the cavity tuning, which tunes the notch.
> > >
> > > This type duplexer is limited in how far from the design frequency
> > you can
> > > tune it as the capacitors are fixed. The cavities will tune but
the loss
> > > goes.
> > >
> > > 73
> > > Gary  K4FMX
> > >
> > > > -Original Message-
> > > > From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> > > > [EMAIL PROTECTED] On Behalf Of fxbuilder
> > > > Sent: Friday, February 16, 2007 5:09 PM
> > > > To: Repeater-Builder@yahoogroups.com
> > > > Subject: [Repeater-Builder] Re: Band Pass Duplexer Tuning
> > > >
> > > > I emailed the place I bought it from and that is what I was told.
> > > > Band Pass. No caps on it for notch tuning as on celwave.  Am I
missing
> > > > something here?
> > > > Craig
> > > >
> > > >
> > > >
> > > >
> > > > --- In Repeater-Builder@yahoogroups.com, Ken Arck  wrote:
> > > > >
> > > > > At 01:53 PM 2/16/2007, you wrote:
> > > > >
> > > > > >There is a great article on this site about tuning a notch
> > duplexer by
> > > > > >Kevin. Can similar methods be used for tuning a mobile 6
can band
> > > > > >pass duplexer? Is there an article that I missed that explains
> > it as
> > > > > >easily? I need to re-tune and could use the help. I think I
> > know how
> > > > > >but thought I'd check.
> > > > >
> > > > >  > > > >
> > > > > Ken
> > > > >
> > > >
> >
--
> > > > 
> > > > > President and CTO - Arcom Communications
> > > > > Makers of the world famous RC210 Repeater Controller and
> > accessories.
> > > > > http://www.arcomcontrollers.com/
> > > > > Authorized Dealers for Kenwood and Telewave and
> > > > > we offer complete repeater packages!
> > > > > AH6LE/R - IRLP Node 3000
> > > > > http://www.irlp.net
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> >
>




Re: [Repeater-Builder] FS Dual Junction isolators High Band

2007-02-22 Thread Joe Montierth
I am interested, sent you a PM.

--- Mark <[EMAIL PROTECTED]> wrote:

> I have 4 pcs Antenna Specialists (remember them?) ACJ-2401 J2
> dual junction isolators.  They don't like to tune down to the ham 
> bands so not of use to me.  They came from a VHF tx combiner.
> 
> Pictures upon request (or they look just like the ACJ-2601J2 440
> isolators
> that were in many of the AS catalogs).  
> 
> Shipped via Priority Mail $60 CONUS.  Paypal etc all ok.
> 
> 
> Mark N2QT
> 
> 
> 
> 
>  



 

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with the Yahoo! Search movie showtime shortcut.
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[Repeater-Builder] FS Dual Junction isolators High Band

2007-02-22 Thread Mark
I have 4 pcs Antenna Specialists (remember them?) ACJ-2401 J2
dual junction isolators.  They don't like to tune down to the ham 
bands so not of use to me.  They came from a VHF tx combiner.

Pictures upon request (or they look just like the ACJ-2601J2 440 isolators
that were in many of the AS catalogs).  

Shipped via Priority Mail $60 CONUS.  Paypal etc all ok.


Mark N2QT




 

Re: [Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread Jim B.
W8MIA wrote:
> There is one SMALL problem with your Hypothesis. RF is transmitted by
> Electrons. Light is transmitted by Photons. Science has a rather good
> handle on Electrons but Photons are still not fully understood!!!
> 
> Apples & Oranges!!
> 
> August
> W8MIA

Details, details...

-- 
Jim Barbour
WD8CHL



[Repeater-Builder] Re: Johnson PPL 6060 manual needed

2007-02-22 Thread georgiaskywarn
Do tell, do tell.  Are there other mods need to pull them down that far?
73,
Robert


--- In Repeater-Builder@yahoogroups.com, "JOHN MACKEY" <[EMAIL PROTECTED]>
wrote:
>
> are you saying a 45-470 MHz PPL6060 will work in the 420 MHz range?
> 
> -- Original Message --
> Received: Wed, 21 Feb 2007 09:25:10 PM CST
> From: "Mike - W5JR (f/k/a N5FL)" <[EMAIL PROTECTED]>
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Johnson PPL 6060 manual needed
> 
> > I've run one of those as a repeater for about 25 years now.  It saw 
> > service in a very active linked repeater network for the first 10 of 
> > those years.  I've moved it down to the 420 range for a link, and now 




RE: [Repeater-Builder] Wacom WP-641 cable type and lengths

2007-02-22 Thread fitz

Thank Eric!  I'll give them a call.

-Sean

-Sean

> Sean,
>
> Contact Telewave for information about your Wacom duplexer cables.
> Telewave
> duplexers are very similar in construction to the Wacom units, and
> Telewave
> has the technical data to support and/or modify Wacom cavities.  Go here:
>
>  for contact information.
>
> Ask for the Amateur Radio sales person, and explain that you need the
> cable
> lengths for your Wacom duplexer.  Be aware that you cannot simply make
> cables that are a specific fraction of the wavelength at your RX and TX
> frequencies, because part of the total length is the length of the
> coupling
> loop hidden inside the cavity.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
> Sent: Wednesday, February 21, 2007 11:29 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Wacom WP-641 cable type and lengths
>
> Hi All,
>
> I have access to a WP-641 factory tuned to the ham band, but someone
> removed and misplaced the interconnect cables.
>
> Does anyone have a WP-641 that they could take the measurements from?
>
> I am also in need of the type of cable used. I think Wacom used RG-223/U.
>
> Thanks,
> Sean
>
>
>



[Repeater-Builder] Re: Shiny antennas (Black, Chrome and Salmon Colors)

2007-02-22 Thread W8MIA
There is one SMALL problem with your Hypothesis. RF is transmitted by
Electrons. Light is transmitted by Photons. Science has a rather good
handle on Electrons but Photons are still not fully understood!!!

Apples & Oranges!!

August
W8MIA



-- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote:
>
> 
> The advantage of a dark antennas is how snow and ice might melt 
> off it faster... and most of all how you can't easily see a black 
> mobile whip on your car so it tends not to get tampered with as 
> much. 
> 
> s. 
> 
> > Roger Grady  wrote:
> >
> > At 12:39 PM 2/21/2007, Steve Bosshard \(NU5D\) wrote:
> > 
> > >Regarding a clean and shiny antenna, we had a discussion at
coffee. The
> > >preposition was that radio waves and light have many
similarities, ie.,
> > >wavelength, reflection, Fresnel behavior, and so forth. Using these
> > >similarities, a mirror reflects light, and a dark surface absorbs
> light,
> > >so, wouldn't a shiny antenna reflect incoming
> signals while
> > >a dark colored antenna absorbs signals? This may only apply to
> receiving
> > >antennas - hope I can get this idea to market before the April 1
> edition of
> > >QST..  ..  .. de nu5d
> > 
> > Cute idea. However... How do you know aluminum that's shiny or
black at 
> > visible light frequencies is still shiny or black at radio
frequencies? 
> > Maybe RF black is visible day-glo orange, or pea-soup green. Or
> maybe it 
> > would absorb light so well as to be invisible. I think this would
> make a 
> > good April 1 article. I haven't written one for our repeater club 
> > newsletter for a few years, maybe it's time for another. Assuming
> you don't 
> > mind if I borrow your premise.
> > 
> > As I think about it a vague sense of deja-vu is forming. Maybe there
> was an 
> > April Fool's article years ago somewhere about invisible antennas?
> > 
> > Roger Grady  K9OPO
> >
>




RE: [Repeater-Builder] Re: Capacitor value

2007-02-22 Thread Mike Morris WA6ILQ

Actually I've been working on and off on a series of "component" pages...

caps were first, then I was going to do resistors and pots, then who knows...

At some point I was going to do bench tools (i.e. hand tools, soldering
irons, etc.),

then I was going to attack test equipment... what you need as raw basics.

If anybody wants to help, feel free

Mike WA6ILQ


At 04:35 PM 02/21/07, you wrote:

Hi Mike,
I happen to be on the computer when the question was posed. I 
remembered the chart and sent the message immediately. It seemed 
that hours went by before my post ever appeared. Other newer posts 
were asked and answered, so I don't know why there such a lag time 
before my message got through. Other times my questions and replies 
seem very fast.  Hope you didn't spend much time on the chart.


I checked the database and you are not on moderation so it should 
have been immediate.



As always we appreciate your efforts to help us all.


I have a lot of time as I'm unemployed, and feel that info should
be shared, not hoarded.

If anybody knows of a computer geek or land mobile tech
position in the southern california area I'm looking.


73 JIM  KA2AJH


Mike WA6ILQ