Re: [Repeater-Builder] Wacom 678-A

[Eric Lemmon]

Dave,

Here's the WP-678 tuning instructions:

http://www.repeater-builder.com/wacom/wp678-665-UHF-tuninginstructions.pdf

73, Eric Lemmon WB6FLY

Dave VanHorn wrote:

 Does anyone have tuning instructions for these?  The pass is easy, and
 it's done, but I don't see how to adjust the notch frequency.






 
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Re: [Repeater-Builder] Wacom 678-A

[Dave VanHorn]

At 01:05 AM 6/15/2005, Eric Lemmon wrote:
Dave,

Here's the WP-678 tuning instructions:

http://www.repeater-builder.com/wacom/wp678-665-UHF-tuninginstructions.pdf

AH!  It's under the covers! I didn't know if those were screws or 
covers, or what.

Thanks, all done now, it only takes a few minutes, and is not very hard at all.
I re-ran the tuning a second time, and almost exactly where I was the 
first time, so I guess I got it right.
The notches are deep enough that my SA can't see the signal at the bottom. :)





 
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[Repeater-Builder] DB268??

[georgiaskywarn]

I loaned my Tesco catalog out to someone and cannot find this db
products model number.  Is there such an animal?  This would be for a
statewide ARES project and would be cut in the ham band.
Thanks,
Robert







 
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Re: [Repeater-Builder] Exciter Power Adjust

[Fred Seamans]

I agree with the other comments that 62 to 100 watts output will not make
that much difference. From your description if the handhelds power output of
?(2 to 5 watts), is making it into the repeater receiver at full saturation
and 62 watts out of the duplexer is not making it into the handhelds
receiver, you have a noise problem at the steel mill! With all the
electrical equipment at the mill, there is plenty of noise all over the
spectrum. 1 to 2 db increase will not cure this problem.
Fred
W5VAY
- Original Message -
From: KA9QJG [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, June 14, 2005 3:03 PM
Subject: RE: [Repeater-Builder] Exciter Power Adjust



   If that's the problem, 3 dB ain't going to make the difference.

   Looks to me the problem is the system receiver / not the
  transmitter.

   Neil - WA6KLA

 The problem is Not in the system Receiver, Repeater hears them Great No
 noise, But They do Not hear the Repeater that good in the Steel Mill, I
 think it is a wavelength Problem 440 and Above works Great inside the
Mill.
 If it not going to be worth the Effort I will just forget it, However I
will
 give a Couple at work a Phone call and Bring the Amp on line from 62 to
100
 Watts direct and see if it Makes a Difference inside the Mill.

 Thanks for all the Help Don KA9QJG







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Re: [Repeater-Builder] RG400 or RG214/U

[Kevin Custer]

I think Mike meant to say something else when he spoke of RG-214.

Kevin

Mike Morris WA6ILQ wrote:

  At 07:32 PM 6/14/05, you wrote:

  
  
Anyone know a source of RG400 or RG214/U?  I need short runs to
build duplexer cables.  Does a PL259 fit these cables?  Thanks de
David [EMAIL PROTECTED]

  
  
http://www.thewireman.com

I've given up on 214... this article says why:
http://www.repeater-builder.com/rbtip/double-shielded-coax.html

Also, only use silver-plated connectors at anything above 2m.
Forget the nickel plated ones on 450 and especially on 900.

Mike WA6ILQ





 
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Re: [Repeater-Builder] Exciter Power Adjust

[Jim B.]

Ken Arck wrote:

 At 03:20 PM 6/14/2005 -0700, you wrote: 
 
 The extra will not make the difference, trust me, I went from 100 watts at
 the antenna to 85 watts and no one knows the difference.  The problem that
 you are dealing with is a supherp amount of intermod in that city.
 
 
 My take on the problem is that of aperture. He said that a 220
 machine works from within the building (at least, that's how I read his
 comments) but 2 meters is another story. 
 
 I suspect the shorter wavelength of 220 is able to be reflected and
 refracted inside the building much more easily than does 2 meter energy.  I
 bet UHF would perform even better but there are too many variables to say
 for certain.
 
 I don't believe additional power on the transmitter side is going to make
 any *substantial* improvement.
 
 Ken

Ken is correct-the higher in frequency you go, the less RF will be 
absorbed by most building materials, and more RF will 'bounce' around 
once it get inside through a window or whatever (providing the window 
isn't metalised...)
So 220 will 'penetrate' into a buliding slightly better then 2M. And UHF 
will be even better yet.
That's partly why 2M and down are such crummy bands for hand-held use. 
(The other half is getting a reasonable ground plane on a handheld.) If 
you're primary concern on a repeater is portable coverage in buildings, 
etc, go UHF or above. If you're concern is mobile coverage in hilly 
terrain, go 2M, or better yet 6.
-- 
Jim Barbour
WD8CHL





 
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RE: [Repeater-Builder] DB268??

[Jamey Wright]

Yes there is.  8 bay VHF with internal harness. There are 3 of them on the
tower here at work.  The catch is, they are NLA.  I believe the current
model is the DB228.  Tessco SKU 494664

Jamey Wright
Systems Analyst
Morgan County EMCD 911
Decatur, Al
256-552-0911

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn
Sent: Wednesday, June 15, 2005 5:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] DB268??

I loaned my Tesco catalog out to someone and cannot find this db
products model number.  Is there such an animal?  This would be for a
statewide ARES project and would be cut in the ham band.
Thanks,
Robert







 
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Re: [Repeater-Builder] Exciter Power Adjust

[Jim B.]

Fred Seamans wrote:

 I agree with the other comments that 62 to 100 watts output will not make
 that much difference. From your description if the handhelds power output of
 ?(2 to 5 watts), is making it into the repeater receiver at full saturation
 and 62 watts out of the duplexer is not making it into the handhelds
 receiver, you have a noise problem at the steel mill! With all the
 electrical equipment at the mill, there is plenty of noise all over the
 spectrum. 1 to 2 db increase will not cure this problem.
 Fred
 W5VAY

Good point! Steel mills are notorious for noise generation, between all 
the equipment involved and I think there is some noise generated by the 
hot metal when it's moved/poured/whatever. And again, it will be worse 
at 2M then at 220.

-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] Exciter Power Adjust

[Jim B.]

Ken Arck wrote:

 At 09:23 AM 6/15/2005 -0400, you wrote:
 
 If you're concern is mobile coverage in hilly terrain, go 2M, or better yet 6.
 
 ---Gee, are you saying that 800 Mhz trunking in such topography isn't a
 good idea? LOL!
 
 Ken
 (I lost count of all the public safety agencies who went to 800 trunking,
 only to revert back to their good ol' VHF conventional system!)

That's why I was surprised to hear WV went to UHF (from LB) for their 
state-wide system! I've driven through WV, even 2M dosen't get into some 
of those valleys.
-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] Exciter Power Adjust

[Ken Arck]

At 11:03 AM 6/15/2005 -0400, you wrote:

That's why I was surprised to hear WV went to UHF (from LB) for their 
state-wide system! I've driven through WV, even 2M dosen't get into some 
of those valleys.

---Sometimes I wonder exactly where APCO is coming fromI guess all one
needs do it read Project 25 to have an exact understanding though :-)

Ken




 
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Re: [Repeater-Builder] Exciter Power Adjust

[Mike Morris WA6ILQ]

At 08:03 AM 6/15/05, you wrote:

Ken Arck wrote:

  At 09:23 AM 6/15/2005 -0400, you wrote:
 
  If you're concern is mobile coverage in hilly terrain, go 2M, or better 
 yet 6.
 
  ---Gee, are you saying that 800 Mhz trunking in such topography isn't a
  good idea? LOL!
 
  Ken
  (I lost count of all the public safety agencies who went to 800 trunking,
  only to revert back to their good ol' VHF conventional system!)

That's why I was surprised to hear WV went to UHF (from LB) for their
state-wide system! I've driven through WV, even 2M dosen't get into some
of those valleys.
--
Jim Barbour
WD8CHL

Now you know why the California Highway Patrol is still on 42-43 mhz
(and when the LA County Sheriffs abandoned their 39mhz channels the
CHP snapped them up and are using them as repeater inputs).

Mike WA6ILQ 





 
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RE: [Repeater-Builder] DB268??

[Skip Frolik]

Bummer 
I say bummer if NLA means No Longer Available.
Last year before Hurricane Ivan I started putting
up my private comm site down here in LA (Lower Alabama).
Got the tower up half way and the equipment building
just completed as the storm came through. Have spent
these months since putting my house back together.
Now that that is finally done Hurricane season is once
upon us but hopefully we'll not have another Ivan.
Anyway trying to turn my attention back on the tower,
had DB-228's on the list for the VHF stuff but after
Ivan was seriously considering spending the bucks for
the 268's. Figured they would just hold up better
being this close to the good old Gulf of Mexico.
I knew from my older catalog that there wasn't a 268
specific variant cut from the factory for the Amateur
Freqs but was hoping that I could get some special
order. Last I checked the 228 was offered in that range.
Oh well  maybe Cook Towers if they still monitor
this reflector can comment on the availability of the
268 at all and also on the 2 meter spread. Till then
I've got 8 more sections of this Pirod 48M to stick up
in the air and also 3 Halo's to mount so that will keep
me busy and off the street for a while  Hi.
Skip
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Jamey Wright
Sent: Wednesday, June 15, 2005 08:29 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] DB268??


Yes there is.  8 bay VHF with internal harness. There are 3 of them on the
tower here at work.  The catch is, they are NLA.  I believe the current
model is the DB228.  Tessco SKU 494664

Jamey Wright
Systems Analyst
Morgan County EMCD 911
Decatur, Al
256-552-0911

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn
Sent: Wednesday, June 15, 2005 5:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] DB268??

I loaned my Tesco catalog out to someone and cannot find this db
products model number.  Is there such an animal?  This would be for a
statewide ARES project and would be cut in the ham band.
Thanks,
Robert







 
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Re: [Repeater-Builder] Exciter Power Adjust

[Kevin Custer]

Jim B. wrote:

  I've driven through WV, even 2M dosen't get into some of those valleys.
  


You mean places like Crum or Kermit, in southern West Virginia?
grin

Kevin














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[Repeater-Builder] TK370 radio

[digiteyes403]

Can anyone confirm the lower freq limit on this portable radio.  I
have a chance to get two but need then to work in the 70cm ham band at
the low end.  

Cheers
Jack
VK2TRF
Sydney









 
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Re: [Repeater-Builder] Wacom 678-A

[Eric Lemmon]

Dave,

Congratulations!  It's always good to hear about successes in duplexer tuning.
(The dust covers on those Johansen tuning capacitors have fooled a LOT of 
people!)

One little tip:  If you want to squeeze the utmost performance from your 
duplexer,
but your spectrum analyzer doesn't have the dynamic range to display the full
extent of the notch, then try tuning each can individually.  It sometimes helps 
to
use 6 dB attenuators on either side of the cavity when tuning in this manner, so
that a relatively uniform impedance is presented.  If the jumper cables are the
correct length, the combined performance of the cavities *should* be the sum of 
the
individual cavities, minus the losses in the jumpers.

When you are pushing the envelope of the cavity tuning art, it is a good 
thing to
ensure that your spectrum analyzer or network analyzer is exactly on frequency.
One trick is to use a known-accurate service monitor to generate a birdie that
can be loosely coupled into the less-accurate spectrum analyzer to display a
calibration mark on its display.

73, Eric Lemmon WB6FLY

Dave VanHorn wrote:

AH!  It's under the covers!  I didn't know if those were screws or covers, or 
what.

Thanks, all done now, it only takes a few minutes, and is not very hard at all. 
 I
re-ran the tuning a second time, and almost exactly where I was the first time, 
so
I guess I got it right.  The notches are deep enough that my SA can't see the
signal at the bottom. :)






 
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Re: [Repeater-Builder] Wacom 678-A

[Ken Arck]

At 05:18 PM 6/15/2005 -0700, you wrote:

 It sometimes helps to
use 6 dB attenuators on either side of the cavity when tuning in this
manner, so
that a relatively uniform impedance is presented.  

---I would argue that you should ALWAYS use a pad (3 or 6 dB) when tuning
a cavity. If for no other reason, to present an accurate 50 ohm load.

I never tune a duplexer (or cavities) without a pad on each port.

Ken




 
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[Repeater-Builder] Mitrek drawers...

[Mark Tomany]

Im still working on improving my repeaters RX coverage, specifically handheld
coverage To do this, Im
considering remote RX sites, RF-linked to the main repeater (voted). So..



I have two Mitrek drawer units in my shack  T45JJA6900. In attempting to decode these, I think
Ive found (on the RBTIP site) that they are 800 - 900 MHz band radios. (I guess I could pull the cover
off and look at the elements to see what freq theyre on, eh?? Hehehe.) I do not have control cabling/heads for these (yet)  so, Im
wondering if they were/are capable to stretching up to 927MHz. Id want to put one on TX there and the
other on RX (Link radios)



First things first, Id need to determine whether they even work, but I want
to know their capabilities before I delve into trying to resurrect them into
service



Thanks.

Mark  N9WYS

















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Re: [Repeater-Builder] Wacom 678-A

[Dave VanHorn]

  If the jumper cables are the
correct length, the combined performance of the cavities *should* be 
the sum of the
individual cavities, minus the losses in the jumpers.

That is a question, it was on 460-ish, now 440-ish.

Seems like still a relatively small change, but I don't know EXACTLY 
how to measure the cables to make the new ones the right length, so 
it seems likely that changing them would just make it worse.

When you are pushing the envelope of the cavity tuning art, it is 
a good thing to ensure that your spectrum analyzer or network 
analyzer is exactly on frequency. One trick is to use a 
known-accurate service monitor to generate a birdie that can be 
loosely coupled into the less-accurate spectrum analyzer to display 
a calibration mark on its display.

Yup, that's what I use.  





 
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[Repeater-Builder] Needed: Schematic to a G E Master II VHF amp

[kc4ih]

If anyone can scan the schematic  to a G E Master II VHF amp and 
either post it to the files section or email it to me I would 
appreciate it. 

Thanks  73,
KC4IH






 
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Re: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items)

[Mark A. Holman]

looks like some stuff not related to ham radio ..

mark h.
- Original Message - 
From: Tommie Taylor [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, June 14, 2005 6:28 AM
Subject: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items)


 HAM RADIO EQUIPMENT FOR SALE
 
 The lists is growing, I have included more stuff for sale in my 
 catalog. You
 can browse thru the photos and descriptions to see the stuff.
 
 Click on my link
 
 http://a1cmugs.com/v-web/gallery/albums.php
 
 I will keep adding until all is sold.
 New items added everyday
 Tommie
 
 
 
 ---
 *** Our LIVE Weather Site ***
  http://ctsslampasas.org/myweather/mainpage.html
 *** WEEKLY NET ON THURSDAY 7PM CST (SEE BELOW) ***
 http://groups.yahoo.com/group/CenTexStormSpotters/join 
 
 ECHOLINK NODE# 28821 (KC5YVU-R),and *N2BR* 
 Lampasas Skywarn Freq: 145.330- 162.2T / 444.875+ 88.5T KC5YVU 
 
 Belton Wide Area 147.140+ 123.0T W5BEC
 
 
 
 
 
 
 
 
 Yahoo! Groups Links
 
 
 
 
 
 
 





 
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Re: [Repeater-Builder] Mitrek drawers...

[Captainlance]

Don't bother, they are 806 to 866, they won't do 
927. Lance N2HBA

  - Original Message - 
  From: 
  Mark Tomany 
  
  To: Repeater-Builder 
  Sent: Wednesday, June 15, 2005 8:30 
  PM
  Subject: [Repeater-Builder] Mitrek 
  drawers...
  
  
  I’m 
  still working on improving my repeater’s RX coverage, specifically handheld 
  coverage… To do this, I’m 
  considering remote RX sites, RF-linked to the main repeater (voted). 
  So……..
  
  I have 
  two Mitrek drawer units in my shack – T45JJA6900. In attempting to decode these, I think 
  I’ve found (on the RBTIP site) that they are “800 - 900 MHz band” radios. (I guess I could pull the 
  cover off and look at the elements to see what freq they’re on, eh?? Hehehe.) I do not have control cabling/heads 
  for these (yet) – so, I’m wondering if they were/are capable to “stretching” 
  up to 927MHz. I’d want to put one 
  on TX there and the other on RX… 
  (Link radios…)
  
  First 
  things first, I’d need to determine whether they even work, but I want to know 
  their capabilities before I delve into trying to resurrect them into 
  service…
  
  Thanks.
  Mark – 
  N9WYS













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Re: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items)

[Mathew Quaife]

Don't strike a deal with the guy, agreed to purchase the IFR, and since he got someone that was willing to pay right away, after he told me it would take 4 or 5 days to set up a paypal account, and when I emailed him for his callsign, informed me that the IFR had already sold after I told him I would take it. Bad way to do business.

Mathew
"Mark A. Holman" [EMAIL PROTECTED] wrote:
looks like some stuff not related to ham radio ..mark h.- Original Message - From: "Tommie Taylor" <[EMAIL PROTECTED]>To: Sent: Tuesday, June 14, 2005 6:28 AMSubject: [Repeater-Builder] HAM RADIO EQUIPMENT FOR SALE (Repeater Items) HAM RADIO EQUIPMENT FOR SALE  The lists is growing, I have included more stuff for sale in my  catalog. You can browse thru the photos and descriptions to see the stuff.  Click on my link  http://a1cmugs.com/v-web/gallery/albums.php  I will keep adding until all is sold. New items added everyday Tommie--- *** Our LIVE Weather Site *** http://ctsslampasas.org/myweather/mainpage.html *** WEEKLY NET ON THURSDAY 7PM
 CST (SEE BELOW) *** http://groups.yahoo.com/group/CenTexStormSpotters/join   ECHOLINK NODE# 28821 (KC5YVU-R),and *N2BR*  Lampasas Skywarn Freq: 145.330- 162.2T / 444.875+ 88.5T KC5YVU   Belton Wide Area 147.140+ 123.0T W5BEC Yahoo! Groups Links   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]* Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/
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RE: [Repeater-Builder] Mitrek drawers...

[N9WYS]

Thats
what I needed to know Looks like
the GTX mobile will be the choice, then



Thanks.

Mark  N9WYS



-Original
Message-
From:
Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of Captainlance
Sent: Wednesday, June 15, 2005
9:46 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder]
Mitrek drawers...



Don't
bother, they are 806 to 866, they won't do 927. Lance N2HBA



-
Original Message - 



From: Mark Tomany 



To: Repeater-Builder 

Sent: Wednesday, June 15,
2005 8:30 PM

Subject:
[Repeater-Builder] Mitrek drawers...



Im still working on
improving my repeaters RX coverage, specifically handheld coverage To do this, Im considering remote RX
sites, RF-linked to the main repeater (voted). So..



I have two Mitrek drawer
units in my shack  T45JJA6900. In
attempting to decode these, I think Ive found (on the RBTIP site) that they
are 800 - 900 MHz band radios.
(I guess I could
pull the cover off and look at the elements to see what freq theyre on,
eh?? Hehehe.) I do not have control cabling/heads for
these (yet)  so, Im wondering if they were/are capable to stretching up to
927MHz. Id want to put one on TX
there and the other on RX (Link
radios)



First things first, Id
need to determine whether they even work, but I want to know their capabilities
before I delve into trying to resurrect them into service



Thanks.

Mark  N9WYS 




















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[Repeater-Builder] Re: RG400 or RG214/U

[Laryn Lohman]

 Forget the nickel plated ones on 450 and especially on 900.
 
 Mike WA6ILQ


And nickel plated connectors are well known intermod generators
because of the magnetic properties of nickel.  Silver always...

Laryn K8TVZ






 
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[Repeater-Builder] TKR820

[drwoolweaver]

Does anyone have a source of the special molex plug for the back
of a Kenwood TKR820?  Thanks David [EMAIL PROTECTED]






 
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Re: [Repeater-Builder] Needed: Schematic to a G E Master II VHF amp

[Eric Lemmon]

Many, but not all, schematics can be found in a manual here:

http://www.repeater-builder.com/ge/lbi-master-list.html

It will help a lot if you can provide the part number of the  amp you
have.

73, Eric Lemmon WB6FLY

kc4ih wrote:

 If anyone can scan the schematic  to a G E Master II VHF amp and
 either post it to the files section or email it to me I would
 appreciate it.

 Thanks  73,
 KC4IH






 
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Re: [Repeater-Builder] TKR820

[Maire-Radios]

got a Kenwood part number?   (don't have a 820 book sorry)


- Original Message - 
From: drwoolweaver [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, June 16, 2005 12:05 AM
Subject: [Repeater-Builder] TKR820


 Does anyone have a source of the special molex plug for the back
 of a Kenwood TKR820?  Thanks David [EMAIL PROTECTED]
 
 
 
 
 
 
 
 Yahoo! Groups Links
 
 
 
 
 
 






 
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