Re: [Repeater-Builder] Bend an ICOM a little further

2010-02-18 Thread Paul Plack
DC, he was given a free crystal which turned out to be worth what he paid. I 
never implied he was trying to rubber one cut for another channel, just rubber 
one that was too far off frequency.

73,
Paul, AE4KR

  - Original Message - 
  From: DCFluX 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Wednesday, February 17, 2010 5:33 PM
  Subject: Re: [Repeater-Builder] Bend an ICOM a little further



  Seriously, some people need to read the original message before replying. 

  The original complaint was running out of tunning range on the piston trimmer 
in the channel element while trying to net the crystal on frequency.

  Not rubbering the crystal to another channel or Nuclear warfare on an 
inactive club.

  Also I should mention that the receiver should be set by looking at the LO 
frequency on either a service monitor or a frequency counter of known 
precision, Tuning it until it sounds best is not the way to go. The LO 
frequency for the MASTR-II VHF will be either + or - 11.2 MHz from the receive 
frequency depending on the whether high side injection was specified when 
ordering the crystal.



  On Wed, Feb 17, 2010 at 3:52 PM, Paul Plack pl...@xmission.com wrote:




Forgive me if I'm going where no one wants to go, but isn't there a point 
in the decline of a club at which the nuclear option becomes the best choice?

Guys, the repeater's been a fun ride for 40 years, but we're down to three 
members, and no longer have enough in the treasury to keep the old girl 
running. The coordinator says there are people on the waiting list willing to 
spend the money to take care of a repeater. As I see it, we have two choices. I 
await your guidance. Sincerely...

73,
Paul, AE4KR






  

Re: [Repeater-Builder] Bend an ICOM a little further

2010-02-18 Thread DCFluX
Yeah, I could see that. He did not specify the crystal manufacture, plus the
factory compensated the element to what crystal was originally in it.

I just got some Bomar crystals (Not my choice) for the clubs UHF Micor. The
TX was off 14 to 39 kHz, Had to add a 10pF cap to get the trimmer in the
center range. Strangely the RX was fine.

On Thu, Feb 18, 2010 at 2:01 AM, Paul Plack pl...@xmission.com wrote:



 DC, he was given a free crystal which turned out to be worth what he paid.
 I never implied he was trying to rubber one cut for another channel, just
 rubber one that was too far off frequency.

 73,
 Paul, AE4KR




[Repeater-Builder] Re: GM300/Maxtrac 2w conversion

2010-02-18 Thread kg6uyz
Try the manual power mod, iv taken a low power 900 maxtrac and brought it down 
to about 250mw before the radio stops tx'ing, it got stabler at about 350mw.  I 
had a range of a stable 350mw to 20w or so.  I dont know if the mod can be done 
to a GM300 as i have never done one to that radio, but iv done many to 
maxtracs.  No major hardware changes, look up the mod in the maxtrac section on 
repeater-builder.

I used the radioshack 10k  15 turn pot btw...

Jeff - KG6UYZ
 





Re: [Repeater-Builder] Bend an ICOM a little further

2010-02-18 Thread Paul Plack
There used to be a great little company in the Toronto area called Lesmith that 
did a nice job with crystals at prices below ICM's. They morphed a couple times 
and changed names, but I think they're out of the crystal biz now. Anyone have 
an update?

73,
Paul, AE4KR

  - Original Message - 
  From: DCFluX 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Thursday, February 18, 2010 2:20 AM
  Subject: Re: [Repeater-Builder] Bend an ICOM a little further


  I just got some Bomar crystals (Not my choice) for the clubs UHF Micor. The 
TX was off 14 to 39 kHz, Had to add a 10pF cap to get the trimmer in the center 
range. Strangely the RX was fine.


Re: [Repeater-Builder] Re: GM300/Maxtrac 2w conversion

2010-02-18 Thread Steve
Hi
I have some low band maxtracs here in the UK and want to use them on 6mtrs, 
the rx side is fine but the firmware won't allow you
to set the tx pwr above 50Mhz, so I intend to do the pwr mod, just one track 
cut and a pot between the 9.6v, and one side of the
cut. I have found that my gm300,s can be set to lower power by
just using the rss. I turned one down to 3w no problem

Steve, M1SWB
- Original Message - 
From: kg6uyz kg6u...@gmail.com
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, February 18, 2010 7:31 AM
Subject: [Repeater-Builder] Re: GM300/Maxtrac 2w conversion


 Try the manual power mod, iv taken a low power 900 maxtrac and brought it 
 down to about 250mw before the radio stops tx'ing, it got stabler at about 
 350mw.  I had a range of a stable 350mw to 20w or so.  I dont know if the 
 mod can be done to a GM300 as i have never done one to that radio, but iv 
 done many to maxtracs.  No major hardware changes, look up the mod in the 
 maxtrac section on repeater-builder.

 I used the radioshack 10k  15 turn pot btw...

 Jeff - KG6UYZ






 



 Yahoo! Groups Links






[Repeater-Builder] Re: Bend an ICOM a little further

2010-02-18 Thread ve3ext
no crystal mfctrs left in Canada now, that West is out of business--to my 
knowledge 

Jerry VE3 EXT


RE: [Repeater-Builder] DB224A new harness

2010-02-18 Thread allan crites
Norm
I need you to do two more things:
1)  Tell me where the measurements of the lengths of the coax were made to, 
were they to the edge of the molded tee block, or to the center of the block, 
and at the splice to the different coax cables, was the measurement to the 
center of the splice or at the edge of the shrink tubing? 
2) I used Z measured data from a DB 224A (for the 150-162 range) in my 
inventory, of the physical dimensions of the dipole. Would you confirm the 
dipole dimensions of the antenna you are using, everything including the 
spacing to the mtg pipe, the overall length, the length from the center 
mounting bracket to each end of the dipole and the dimension of the center to 
center of the folded section. I want to confirm that I am using correct data in 
my calculations. Only one dipole dims. are necessary. A dwg would be nice.
From first go around the Smith Chart, it appears that to use or modify the 
O.C. stub to optimize the impedance matching for use at 144-148 Mhz may 
be unwise. I'm leaning towards adding a Tee adapter with stub at the feed 
point connector, and if necessary modifying the length of the 106.5, 50 Ohm 
feed line coax. If you somehow modify the O.C. stub and your results are 
worse, then you have essentially destroyed the matching harness 
usefulness. Please also advise the type of connector used at the feed-point, 
N or UHF.
 
WA9ZZU 
 

--- On Wed, 2/17/10, NORM KNAPP nkn...@twowayradio.net wrote:


From: NORM KNAPP nkn...@twowayradio.net
Subject: RE: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@yahoogroups.com
Date: Wednesday, February 17, 2010, 10:35 PM


  



The unknown coax type is/was VB-83 (35 ohm). The VB-8 is of course 50 ohm and 
the VB-11 is 75 ohm.
I hope that is the info you needed. It would be great if you could figure out 
what the open stub is for and can we use that for adjustments. If you need more 
info, let me know.
73
Norm

 _ _ __

From: Repeater-Builder@ yahoogroups. com on behalf of allan crites
Sent: Wed 2/17/2010 9:29 PM
To: Repeater-Builder@ yahoogroups. com
Subject: RE: [Repeater-Builder] DB224A new harness

I tried to work backwards on a Smith Chart from the dipole to the 1/2 WL O.C. 
stub to determine a reason for the stub but it appears the unknown coax types 
are causing erroneous and confusing answers.
Can you confirm the coax types shown on your diagram?
a.

--- On Wed, 2/17/10, NORM KNAPP nkn...@twowayradio. net wrote:

From: NORM KNAPP nkn...@twowayradio. net
Subject: RE: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@ yahoogroups. com
Date: Wednesday, February 17, 2010, 3:57 PM



I got the harnesses at no charge from Andrew. I contacted customer support and 
told them I had 3 fairly new DB224's (2 a models and a b model) that had water 
intrusion/contamina tion in the harness where they were supposedly seal by the 
factory. I offered pictures and they accepted. Upon seeing the photos they 
asked that I give them serial numbers and requested I send the defective 
harnesses to them. I did and they offered and I accepted replacement harnesses.
The two db224's that I have (personally) are the A models. The B model belongs 
to my shop. I often end up with abandoned and or defective db224's and other 
antennas as I work for a two way land mobile dealer/shop. Unfortunately, I have 
yet to get any DB224e's or any DB304's, just tons of DB224a's and an occasional 
DB224b.
Hats off to Andrew for shipping me free replacement harnesses. I am still gonna 
ScotchKote those moldings regaurdelss.
If you look at the attached photoes from my initial post, you will see that the 
open 25 VB-8 (50 ohm) stub is 12.5 from the T where the top half and bottom 
halves of the harness come together, down the main feed to the hardline (or 
whatever you feed the antenna with).
Last night I connected the Sitemaster up again and I noticed the the SWR will 
come down some when I firmly secure the harness to the mast with the metal 
tape. How far down remains to be seen. I will keep you posted.
73 and thanks!
de N5NPO
Norm









Re: [Repeater-Builder] Bend an ICOM a little further

2010-02-18 Thread John J. Riddell
Les Smith died several years ago and the Company is no longer in business.

Les started making crystals at  CTS in Streetsville Ontario and about 35 years 
ago he started his 
own company.  I have lot's of his crystals here.

73 John VE3AMZ
Waterloo Ont.  (Where the Blackberry was invented)



  - Original Message - 
  From: Paul Plack 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Thursday, February 18, 2010 4:41 AM
  Subject: Re: [Repeater-Builder] Bend an ICOM a little further





  There used to be a great little company in the Toronto area called Lesmith 
that did a nice job with crystals at prices below ICM's. They morphed a couple 
times and changed names, but I think they're out of the crystal biz now. Anyone 
have an update?

  73,
  Paul, AE4KR

- Original Message - 
From: DCFluX 
To: Repeater-Builder@yahoogroups.com 
Sent: Thursday, February 18, 2010 2:20 AM
Subject: Re: [Repeater-Builder] Bend an ICOM a little further


I just got some Bomar crystals (Not my choice) for the clubs UHF Micor. The 
TX was off 14 to 39 kHz, Had to add a 10pF cap to get the trimmer in the center 
range. Strangely the RX was fine.




  

RE: [Repeater-Builder] Bend an ICOM a little further

2010-02-18 Thread Jeff DePolo
 I just got some Bomar crystals (Not my choice) for the clubs 
 UHF Micor. The TX was off 14 to 39 kHz, Had to add a 10pF cap 
 to get the trimmer in the center range. Strangely the RX was fine.

That's probably not indicitive of Bomar making a bad rock; you almost always
have to change out the cap behind the trimmer to center the tuning range if
the original frequency was significantly different than the new.  Maybe you
just got lucky on the RX element, but 9 times out of 10, I've had to change
caps in Micor elements to get them to net, regardless of whether the crystal
came from Bomar, ICM, or West Crystal.

--- Jeff WN3A



Re: [Repeater-Builder] DB224A new harness

2010-02-18 Thread NORM KNAPP
Thanks Allen.
All coax harness measurements are center of moldings or splices.
The dipoles are supposed to be standard db224a elements. I will have to measure 
them and get back to you on that.
All connectors are N type.
Thanks again
Norm

- Original Message -
From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com
To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com
Sent: Thu Feb 18 08:49:47 2010
Subject: RE: [Repeater-Builder] DB224A new harness

  

Norm
I need you to do two more things:
1)  Tell me where the measurements of the lengths of the coax were made to, 
were they to the edge of the molded tee block, or to the center of the block, 
and at the splice to the different coax cables, was the measurement to the 
center of the splice or at the edge of the shrink tubing? 
2) I used Z measured data from a DB 224A (for the 150-162 range) in my 
inventory, of the physical dimensions of the dipole. Would you confirm the 
dipole dimensions of the antenna you are using, everything including the 
spacing to the mtg pipe, the overall length, the length from the center 
mounting bracket to each end of the dipole and the dimension of the center to 
center of the folded section. I want to confirm that I am using correct data in 
my calculations. Only one dipole dims. are necessary. A dwg would be nice.
From first go around the Smith Chart, it appears that to use or modify the O.C. 
stub to optimize the impedance matching for use at 144-148 Mhz may be unwise. 
I'm leaning towards adding a Tee adapter with stub at the feed point connector, 
and if necessary modifying the length of the 106.5, 50 Ohm feed line coax. If 
you somehow modify the O.C. stub and your results are worse, then you have 
essentially destroyed the matching harness usefulness. Please also advise the 
type of connector used at the feed-point, N or UHF.
 
WA9ZZU 
 

--- On Wed, 2/17/10, NORM KNAPP nkn...@twowayradio.net wrote:



From: NORM KNAPP nkn...@twowayradio.net
Subject: RE: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@yahoogroups.com
Date: Wednesday, February 17, 2010, 10:35 PM


  
The unknown coax type is/was VB-83 (35 ohm). The VB-8 is of course 50 
ohm and the VB-11 is 75 ohm.
I hope that is the info you needed. It would be great if you could 
figure out what the open stub is for and can we use that for adjustments. If 
you need more info, let me know.
73
Norm

 _ _ __

From: Repeater-Builder@ yahoogroups. com 
http://us.mc822.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com
  on behalf of allan crites
Sent: Wed 2/17/2010 9:29 PM
To: Repeater-Builder@ yahoogroups. com 
http://us.mc822.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com
 
Subject: RE: [Repeater-Builder] DB224A new harness

I tried to work backwards on a Smith Chart from the dipole to the 1/2 
WL O.C. stub to determine a reason for the stub but it appears the unknown coax 
types are causing erroneous and confusing answers.
Can you confirm the coax types shown on your diagram?
a.

--- On Wed, 2/17/10, NORM KNAPP nkn...@twowayradio. net 
http://us.mc822.mail.yahoo.com/mc/compose?to=nknapp%40twowayradio.net  wrote:

From: NORM KNAPP nkn...@twowayradio. net 
http://us.mc822.mail.yahoo.com/mc/compose?to=nknapp%40twowayradio.net 
Subject: RE: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@ yahoogroups. com 
http://us.mc822.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com
 
Date: Wednesday, February 17, 2010, 3:57 PM



I got the harnesses at no charge from Andrew. I contacted customer 
support and told them I had 3 fairly new DB224's (2 a models and a b model) 
that had water intrusion/contamina tion in the harness where they were 
supposedly seal by the factory. I offered pictures and they accepted. Upon 
seeing the photos they asked that I give them serial numbers and requested I 
send the defective harnesses to them. I did and they offered and I accepted 
replacement harnesses.
The two db224's that I have (personally) are the A models. The B model 
belongs to my shop. I often end up with abandoned and or defective db224's and 
other antennas as I work for a two way land mobile dealer/shop. Unfortunately, 
I have yet to get any DB224e's or any DB304's, just tons of DB224a's and an 
occasional DB224b.
Hats off to Andrew for shipping me free replacement harnesses. I am 
still gonna ScotchKote those moldings regaurdelss.
If you look at the attached photoes from my initial post, you will see 
that the open 25 VB-8 (50 ohm) stub is 12.5 from the T where the top half 
and bottom halves of the harness come together, down the main feed to the 
hardline (or whatever 

[Repeater-Builder] Re: Bend an ICOM a little further

2010-02-18 Thread wb6dgn


I just got some Bomar crystals (Not my choice) for the clubs UHF Micor

I just got some crystals from Bomar, my first crystal order in about 40 years.  
Some were basic crystals for an Alert Monitor receiver and some were in channel 
elements supplied and compensated by Bomar.  Every crystal/element that I 
received was right on the money and one of the elements didn't even require a 
slight touch up to hit it's mark (my frequency reference is a bit more 
accurate than the average service monitor, too). AND,some of this equipment 
operates in the temperature extremes that have been prevalent in the midwest in 
recent weeks. My suggestion would be to avoid implicating a manufacturer for an 
individual case of error as there are far too many variables involved to pin 
the results on any one cause.  I have no business involvement with Bomar, just 
a satisfied customer.  My only gripe is their minimum order requirement which 
means that I have to wait to order until I can meet the requirement.
Tom DGN

--- In Repeater-Builder@yahoogroups.com, DCFluX dcf...@... wrote:

 Yeah, I could see that. He did not specify the crystal manufacture, plus the
 factory compensated the element to what crystal was originally in it.
 
 I just got some Bomar crystals (Not my choice) for the clubs UHF Micor. The
 TX was off 14 to 39 kHz, Had to add a 10pF cap to get the trimmer in the
 center range. Strangely the RX was fine.
 
 On Thu, Feb 18, 2010 at 2:01 AM, Paul Plack pl...@... wrote:
 
 
 
  DC, he was given a free crystal which turned out to be worth what he paid.
  I never implied he was trying to rubber one cut for another channel, just
  rubber one that was too far off frequency.
 
  73,
  Paul, AE4KR
 
 





[Repeater-Builder] Re: DB224A new harness

2010-02-18 Thread Tyke
   
Hello to all,

   This is just my opinion but since the new style harnesses have been 
installed on all of the new DB-224s,  i have found that the patterns and 
recieve /transmit ranges have  changed drastically for the worse  I have 
replaced harnesses and also complete swap-out of some antennas and have found 
the ranges greatly reduced.  i confirmed this by reinstalling the original 
antennas  and or harness and quickly went back to the original  performance ( 
it doesn't look good  when a lightning dammaged 4-bay antenna outperforms a 
brand new 
8-bay antenna).  The harnesses were replaced because of lighting damages ( high 
SWR) but still had good rx . on the complete antenna replacements,  i had 
actually swapped out DB-228s to improved the range for handhelds in the field 
but saw a reducedction in range for both bases, mobiles and handhelds. 

   The new harnesses are using a stub tuning to make it easier for the 
non-technical people down in Mexico to put these antennas out the door quickly 
but only hinders the performanace of the antennas.  my first time installing 
one of these stub  tuned  DB-228s caused me to send the antenna back to the 
ground 3 times , while arguing with the ground crew that They sent up the wrong 
section 1st( all eight bays should be in the same radiating plane not half 
up/half down) after numerous calls with DB Products about this with very little 
response, they said that the stub, change the timing of the rf wave using a a 
time diversity inversion to actually put all the bays in phase DELAY LINES , 
although half of them were inverted..  BULLL CRAP!!  all it did was screw 
things up.  the reason they did it this way, was to simplfy the building of the 
antennas. by grossly underpaid below the border non-technical labor.
 
  It is easier to tell or show someone to build all the antennas the same way 
and just invert one half of the antenna  to make a DB-228 by putting together 
(2) DB-224s without having to completely build a seperate antenna with the bays 
oriented to match the other half.  i have taken two of these new style DB-228s 
and reconfigutreed the bays on the lower half to match the upper half and  you 
guessed it. the performance  is back where it should be.

   As for the water ingress problem with DB-224/228 harnesses,  i have always 
used  Liquid Tape and Scotch 88 tape to seal all the connections and molded 
joints on these antennas ( I don't use Scotch-Kote as it eventually dries out, 
becomes brittle and disentigrates in the weather( it is fine for use in 
partially exposed enviroments, but just doesn't standup to the liquid tape for 
longivity, in the weather!!! I try not to leave anything to chance. 

  Some people would say that this defeats the chance of recurring revenue, but  
i look at it this way, if  i seal it up right the first time and never have to 
do maintenance on it, then that speaks well of my installation and i stand a 
better chance of getting more  work from those customers than if  i did a 
marginal job and had to keep returning to fix  a recurring proplem for an 
unhappy customer, at my expense !

   anyhow enough of my my ramblings for this episode.  if you have time to play 
with a DB-228(new style, experiment with it and i think you will agree with me. 
if not, then MY BADDD!! To each his own.

CUL 

tyrone   N5XES



[Repeater-Builder] VHF Decibel Duplexer

2010-02-18 Thread skipp025
Re: VHF Decibel Duplexer 

I should probably buy this... or at least bid on it. But I'm 
making a serious effort to revive my 12 Step Junk Ender's Program 
participation.  So I'll pass this on to one of you to hopefully 
take advantage of. It's a great Deal for what this is... 

Ebay Item Number: 150413877464 
Decibel Products VHF TR Duplexer   

You're not restricted to using this unit as a duplexer... The 
circuit is two paths of notch cavities (tuned circuits) so you 
can get quite creative.  

You could also use it as a commercial vhf repeater duplexer and
or a non-standard offset ham repeater duplexer.  

good luck, 
s. 



Re: [Repeater-Builder] DB224A new harness

2010-02-18 Thread Tom Manning
Hello Andrew and Norm
If you are trying to figure out the lengths needed for 144-148Mhz I can 
measure what you need to know but not in a hurry.  I have a DB products antenna 
that is cut for the two meter band that I ordered from DB Products about 10 
years ago.  What I need to know is the measurements for 220Mhz.  I also have 
several DB224a's that have been removed due to problems.  These could easily be 
modified to cover 220Mhz. 73 de Tom Manning, AF4UG
  - Original Message - 
  From: NORM KNAPP 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Wednesday, February 17, 2010 10:35 PM
  Subject: RE: [Repeater-Builder] DB224A new harness



  The unknown coax type is/was VB-83 (35 ohm). The VB-8 is of course 50 ohm and 
the VB-11 is 75 ohm.
  I hope that is the info you needed. It would be great if you could figure out 
what the open stub is for and can we use that for adjustments. If you need more 
info, let me know.
  73
  Norm

  

  From: Repeater-Builder@yahoogroups.com on behalf of allan crites
  Sent: Wed 2/17/2010 9:29 PM
  To: Repeater-Builder@yahoogroups.com
  Subject: RE: [Repeater-Builder] DB224A new harness

  I tried to work backwards on a Smith Chart from the dipole to the 1/2 WL O.C. 
stub to determine a reason for the stub but it appears the unknown coax types 
are causing erroneous and confusing answers.
  Can you confirm the coax types shown on your diagram?
  a.

  --- On Wed, 2/17/10, NORM KNAPP nkn...@twowayradio.net wrote:

  From: NORM KNAPP nkn...@twowayradio.net
  Subject: RE: [Repeater-Builder] DB224A new harness
  To: Repeater-Builder@yahoogroups.com
  Date: Wednesday, February 17, 2010, 3:57 PM



  I got the harnesses at no charge from Andrew. I contacted customer support 
and told them I had 3 fairly new DB224's (2 a models and a b model) that had 
water intrusion/contamina tion in the harness where they were supposedly seal 
by the factory. I offered pictures and they accepted. Upon seeing the photos 
they asked that I give them serial numbers and requested I send the defective 
harnesses to them. I did and they offered and I accepted replacement harnesses.
  The two db224's that I have (personally) are the A models. The B model 
belongs to my shop. I often end up with abandoned and or defective db224's and 
other antennas as I work for a two way land mobile dealer/shop. Unfortunately, 
I have yet to get any DB224e's or any DB304's, just tons of DB224a's and an 
occasional DB224b.
  Hats off to Andrew for shipping me free replacement harnesses. I am still 
gonna ScotchKote those moldings regaurdelss.
  If you look at the attached photoes from my initial post, you will see that 
the open 25 VB-8 (50 ohm) stub is 12.5 from the T where the top half and 
bottom halves of the harness come together, down the main feed to the hardline 
(or whatever you feed the antenna with).
  Last night I connected the Sitemaster up again and I noticed the the SWR will 
come down some when I firmly secure the harness to the mast with the metal 
tape. How far down remains to be seen. I will keep you posted.
  73 and thanks!
  de N5NPO
  Norm




  

Re: [Repeater-Builder] DB224A new harness

2010-02-18 Thread allan crites
Tom
I would certainly be interested in knowing just how a 150-162 MHz DB224 could 
be easily be modified to cover 220. The dipoles would need to be physically 
shortened and the matching harness would need to be completely redesigned. 
What magic do you have in your bag of tricks to manage this? 
 
Allan Crites  WA9ZZU


--- On Thu, 2/18/10, Tom Manning af...@bellsouth.net wrote:


From: Tom Manning af...@bellsouth.net
Subject: Re: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@yahoogroups.com
Date: Thursday, February 18, 2010, 4:58 PM


  




Hello Andrew and Norm
    If you are trying to figure out the lengths needed for 144-148Mhz I can 
measure what you need to know but not in a hurry.  I have a DB products antenna 
that is cut for the two meter band that I ordered from DB Products about 10 
years ago.  What I need to know is the measurements for 220Mhz.  I also have 
several DB224a's that have been removed due to problems.  These could easily be 
modified to cover 220Mhz. 73 de Tom Manning, AF4UG

- Original Message - 
From: NORM KNAPP 
To: Repeater-Builder@ yahoogroups. com 
Sent: Wednesday, February 17, 2010 10:35 PM
Subject: RE: [Repeater-Builder] DB224A new harness

  

The unknown coax type is/was VB-83 (35 ohm). The VB-8 is of course 50 ohm and 
the VB-11 is 75 ohm.
I hope that is the info you needed. It would be great if you could figure out 
what the open stub is for and can we use that for adjustments. If you need more 
info, let me know.
73
Norm

 _ _ __

From: Repeater-Builder@ yahoogroups. com on behalf of allan crites
Sent: Wed 2/17/2010 9:29 PM
To: Repeater-Builder@ yahoogroups. com
Subject: RE: [Repeater-Builder] DB224A new harness

I tried to work backwards on a Smith Chart from the dipole to the 1/2 WL O.C. 
stub to determine a reason for the stub but it appears the unknown coax types 
are causing erroneous and confusing answers.
Can you confirm the coax types shown on your diagram?
a.

--- On Wed, 2/17/10, NORM KNAPP nkn...@twowayradio. net wrote:

From: NORM KNAPP nkn...@twowayradio. net
Subject: RE: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@ yahoogroups. com
Date: Wednesday, February 17, 2010, 3:57 PM



I got the harnesses at no charge from Andrew. I contacted customer support and 
told them I had 3 fairly new DB224's (2 a models and a b model) that had water 
intrusion/contamina tion in the harness where they were supposedly seal by the 
factory. I offered pictures and they accepted. Upon seeing the photos they 
asked that I give them serial numbers and requested I send the defective 
harnesses to them. I did and they offered and I accepted replacement harnesses.
The two db224's that I have (personally) are the A models. The B model belongs 
to my shop. I often end up with abandoned and or defective db224's and other 
antennas as I work for a two way land mobile dealer/shop. Unfortunately, I have 
yet to get any DB224e's or any DB304's, just tons of DB224a's and an occasional 
DB224b.
Hats off to Andrew for shipping me free replacement harnesses. I am still gonna 
ScotchKote those moldings regaurdelss.
If you look at the attached photoes from my initial post, you will see that the 
open 25 VB-8 (50 ohm) stub is 12.5 from the T where the top half and bottom 
halves of the harness come together, down the main feed to the hardline (or 
whatever you feed the antenna with).
Last night I connected the Sitemaster up again and I noticed the the SWR will 
come down some when I firmly secure the harness to the mast with the metal 
tape. How far down remains to be seen. I will keep you posted.
73 and thanks!
de N5NPO
Norm









[Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread ka9qjg1
FYI 

It is now Against the Law in Il To Rebroadcast Public safety Communications 
including radio or Internet 

I know most of us in this Hobby are aware of all the Scanner Type 
Communications being linked d to the Internet. I always wondered about the 
legality of doing this especially living in one of the Few States that have an 
Anti Scanner Law against mobiles and Handhelds unless one is exempt.

I always liked the idea of seeing something big on the News and finding a site 
from that area to listen to it Live . 

Well it looks like Il has put together a law against doing this I do not know 
about other states . Or how this is going to stop the On Line Scanner stations.

Also as written unless I have permission it looks like I cannot rebroadcast the 
Amber Alerts which come out over My Emerg Weather Receive on My Repeaters I am 
sure others have this on the Repeters too

This will be interesting to see if anyone is a actually charged with this 

Don KA9QJG 

Statutes Amended In Order of Appearance
20 ILCS 2615/11 new 
20 ILCS 2615/12 new 

Synopsis As Introduced
Amends the State Police Radio Act. Provides that a person receiving public 
safety voice or data communication transmitted via the facilities of the 
State's public safety radio system by wire or radio shall not, without the 
written authority of the originator of the communication, rebroadcast the 
communication via any means, including radio or Internet, or otherwise divulge 
or publish the existence, contents, substance, purport, effect, or meaning 
thereof. Provides that this provision does not apply to the public safety radio 
communication transmitted by any system station for the use of the general 
public, including Amber Alerts and other communications specifically intended 
for rebroadcast to the public. Provides that radio access to the public safety 
radio system within the State may only be accomplished upon receipt of written 
authorization granted by the appropriately licensed authority. Provides that a 
violation of these provisions is a Class A misdemeanor. Effective immediately.

http://tinyurl.com/yf3on2y




Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Eric Lowell
Wow! I would have thought it illegal under Federal Law. What do I know

Best Regardss, de W1EL
 Eric Lowell
Eastern Maine Electronics Inc.
48 Loon Road
Wesley ME 04686
eme@starband.net
www.satnetmaine.com






From: ka9qjg1 ka9...@wowway.com
To: Repeater-Builder@yahoogroups.com
Sent: Thu, February 18, 2010 9:27:44 PM
Subject: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety 
Communications

  
FYI 

It is now Against the Law in Il To Rebroadcast Public safety Communications 
including radio or Internet 

I know most of us in this Hobby are aware of all the Scanner Type 
Communications being linked d to the Internet. I always wondered about the 
legality of doing this especially living in one of the Few States that have an 
Anti Scanner Law against mobiles and Handhelds unless one is exempt.

I always liked the idea of seeing something big on the News and finding a site 
from that area to listen to it Live . 

Well it looks like Il has put together a law against doing this I do not know 
about other states . Or how this is going to stop the On Line Scanner stations.

Also as written unless I have permission it looks like I cannot rebroadcast the 
Amber Alerts which come out over My Emerg Weather Receive on My Repeaters I am 
sure others have this on the Repeters too

This will be interesting to see if anyone is a actually charged with this 

Don KA9QJG 

Statutes Amended In Order of Appearance
20 ILCS 2615/11 new 
20 ILCS 2615/12 new 

Synopsis As Introduced
Amends the State Police Radio Act. Provides that a person receiving public 
safety voice or data communication transmitted via the facilities of the 
State's public safety radio system by wire or radio shall not, without the 
written authority of the originator of the communication, rebroadcast the 
communication via any means, including radio or Internet, or otherwise divulge 
or publish the existence, contents, substance, purport, effect, or meaning 
thereof. Provides that this provision does not apply to the public safety radio 
communication transmitted by any system station for the use of the general 
public, including Amber Alerts and other communications specifically intended 
for rebroadcast to the public. Provides that radio access to the public safety 
radio system within the State may only be accomplished upon receipt of written 
authorization granted by the appropriately licensed authority. Provides that a 
violation of these provisions is a Class A
 misdemeanor. Effective immediately.

http://tinyurl. com/yf3on2y





  

RE: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Andrew Seybold
The Federal Law says only that is it illegal to divulge radio traffic to third 
parties or to use it for personal profit or gain (ambulance chasers), when I 
lived in Philadelphia in the 60’s the Phila PD used to pipe their 
communications into the various radio stations and TV Stations—then they passed 
a anti scanner law.

 

The Chief of Miami PD once said that he wanted to sell ads on his network—the 
following robbery is brought to you by the bank of Miami.

 

Andy

 

From: Repeater-Builder@yahoogroups.com 
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lowell
Sent: Thursday, February 18, 2010 6:56 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety 
Communications

 

  

Wow! I would have thought it illegal under Federal Law. What do I know

 

Best Regardss, de W1EL
 

Eric Lowell
Eastern Maine Electronics Inc.
48 Loon Road
Wesley ME 04686
eme@starband.net
www.satnetmaine.com

 



From: ka9qjg1 ka9...@wowway.com
To: Repeater-Builder@yahoogroups.com
Sent: Thu, February 18, 2010 9:27:44 PM
Subject: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety 
Communications

  

FYI 

It is now Against the Law in Il To Rebroadcast Public safety Communications 
including radio or Internet 

I know most of us in this Hobby are aware of all the Scanner Type 
Communications being linked d to the Internet. I always wondered about the 
legality of doing this especially living in one of the Few States that have an 
Anti Scanner Law against mobiles and Handhelds unless one is exempt.

I always liked the idea of seeing something big on the News and finding a site 
from that area to listen to it Live . 

Well it looks like Il has put together a law against doing this I do not know 
about other states . Or how this is going to stop the On Line Scanner stations.

Also as written unless I have permission it looks like I cannot rebroadcast the 
Amber Alerts which come out over My Emerg Weather Receive on My Repeaters I am 
sure others have this on the Repeters too

This will be interesting to see if anyone is a actually charged with this 

Don KA9QJG 

Statutes Amended In Order of Appearance
20 ILCS 2615/11 new 
20 ILCS 2615/12 new 

Synopsis As Introduced
Amends the State Police Radio Act. Provides that a person receiving public 
safety voice or data communication transmitted via the facilities of the 
State's public safety radio system by wire or radio shall not, without the 
written authority of the originator of the communication, rebroadcast the 
communication via any means, including radio or Internet, or otherwise divulge 
or publish the existence, contents, substance, purport, effect, or meaning 
thereof. Provides that this provision does not apply to the public safety radio 
communication transmitted by any system station for the use of the general 
public, including Amber Alerts and other communications specifically intended 
for rebroadcast to the public. Provides that radio access to the public safety 
radio system within the State may only be accomplished upon receipt of written 
authorization granted by the appropriately licensed authority. Provides that a 
violation of these provisions is a Class A misdemeanor. Effective immediately.

http://tinyurl. com/yf3on2y http://tinyurl.com/yf3on2y 

 





RE: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Mike Besemer (WM4B)
Provides that this provision does not apply to the public safety radio
communication transmitted by any system station for the use of the general
public, including Amber Alerts and other communications specifically
intended for rebroadcast to the public.

 

The way I read this, you specifically CAN retransmit Amber Alerts, etc.

 

Also, the provision reads that you cannot retransmit voice or data
transmitted via the STATES public radio system.  Amber Alerts going out over
NOAA Weather Radio are NOT being transmitted by state facilities. NOAA is a
Federal agency.

 

Mike

WM4B

 

 

 

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of ka9qjg1
Sent: Thursday, February 18, 2010 9:28 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety
Communications

 

  

FYI 

It is now Against the Law in Il To Rebroadcast Public safety Communications
including radio or Internet 

I know most of us in this Hobby are aware of all the Scanner Type
Communications being linked d to the Internet. I always wondered about the
legality of doing this especially living in one of the Few States that have
an Anti Scanner Law against mobiles and Handhelds unless one is exempt.

I always liked the idea of seeing something big on the News and finding a
site from that area to listen to it Live . 

Well it looks like Il has put together a law against doing this I do not
know about other states . Or how this is going to stop the On Line Scanner
stations.

Also as written unless I have permission it looks like I cannot rebroadcast
the Amber Alerts which come out over My Emerg Weather Receive on My
Repeaters I am sure others have this on the Repeters too

This will be interesting to see if anyone is a actually charged with this 

Don KA9QJG 

Statutes Amended In Order of Appearance
20 ILCS 2615/11 new 
20 ILCS 2615/12 new 

Synopsis As Introduced
Amends the State Police Radio Act. Provides that a person receiving public
safety voice or data communication transmitted via the facilities of the
State's public safety radio system by wire or radio shall not, without the
written authority of the originator of the communication, rebroadcast the
communication via any means, including radio or Internet, or otherwise
divulge or publish the existence, contents, substance, purport, effect, or
meaning thereof. Provides that this provision does not apply to the public
safety radio communication transmitted by any system station for the use of
the general public, including Amber Alerts and other communications
specifically intended for rebroadcast to the public. Provides that radio
access to the public safety radio system within the State may only be
accomplished upon receipt of written authorization granted by the
appropriately licensed authority. Provides that a violation of these
provisions is a Class A misdemeanor. Effective immediately.

http://tinyurl.com/yf3on2y





Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Paul Holm
I can't imagine any reason why it shouldn't be legal to do this.  Where is the 
sense?  Oops, there I go thinking that all laws should make sense.


73  Paul - KC0HST



  - Original Message - 
  From: Eric Lowell 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Thursday, February 18, 2010 8:56 PM
  Subject: Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety 
Communications





  Wow! I would have thought it illegal under Federal Law. What do I know

  Best Regardss, de W1EL
   
  Eric Lowell


Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Paul Plack
Don, the copy of the statute you quoted specifically exempts communications 
transmitted ...for the use of the general public, including Amber Alerts.

What I want to know is, what if you set up across the state line with a yagi, 
and put it on the web from there? Your QTH would be just the place from which 
to do it! Nyah-nyah, Illinois!

73,
Paul, AE4KR

  - Original Message - 
  From: ka9qjg1 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Thursday, February 18, 2010 7:27 PM
  Subject: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety 
Communications



  FYI 

  It is now Against the Law in Il To Rebroadcast Public safety Communications 
including radio or Internet 

  I know most of us in this Hobby are aware of all the Scanner Type 
Communications being linked d to the Internet. I always wondered about the 
legality of doing this especially living in one of the Few States that have an 
Anti Scanner Law against mobiles and Handhelds unless one is exempt.

  I always liked the idea of seeing something big on the News and finding a 
site from that area to listen to it Live . 

  Well it looks like Il has put together a law against doing this I do not know 
about other states . Or how this is going to stop the On Line Scanner stations.

  Also as written unless I have permission it looks like I cannot rebroadcast 
the Amber Alerts which come out over My Emerg Weather Receive on My Repeaters I 
am sure others have this on the Repeters too

  This will be interesting to see if anyone is a actually charged with this 

  Don KA9QJG 

  Statutes Amended In Order of Appearance
  20 ILCS 2615/11 new 
  20 ILCS 2615/12 new 

  Synopsis As Introduced
  Amends the State Police Radio Act. Provides that a person receiving public 
safety voice or data communication transmitted via the facilities of the 
State's public safety radio system by wire or radio shall not, without the 
written authority of the originator of the communication, rebroadcast the 
communication via any means, including radio or Internet, or otherwise divulge 
or publish the existence, contents, substance, purport, effect, or meaning 
thereof. Provides that this provision does not apply to the public safety radio 
communication transmitted by any system station for the use of the general 
public, including Amber Alerts and other communications specifically intended 
for rebroadcast to the public. Provides that radio access to the public safety 
radio system within the State may only be accomplished upon receipt of written 
authorization granted by the appropriately licensed authority. Provides that a 
violation of these provisions is a Class A misdemeanor. Effective immediately.

  http://tinyurl.com/yf3on2y



  

Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread James Delancy
Then it is a federal matter  and not that I am much good with this 
legal stuff ... but no matter where you are, it is illegal to divulge 
what you hear to a 3rd party ... that would include a re-broadcast via 
IP or radio anyway??  So with that, aren't all the scanner sites illegal?

James

Paul Plack wrote:


 Don, the copy of the statute you quoted specifically exempts 
 communications transmitted ...for the use of the general public, 
 including Amber Alerts.
  
 What I want to know is, what if you set up across the state line with 
 a yagi, and put it on the web from there? Your QTH would be just the 
 place from which to do it! Nyah-nyah, Illinois!
  
 73,
 Paul, AE4KR


RE: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Mike Besemer (WM4B)
That's not true.  Certain information (that which is specifically intended
for rebroadcast to the public) MAY be rebroadcast.  

 

The statute (both Federal and State) has to do with privileged
communications, not material which is intended for public consumption. 

 

It appears to me that this law is redundant. but then again most of the
Gov't is redundant, so what else is new.

 

WM4B 

 

  _  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of James Delancy
Sent: Thursday, February 18, 2010 10:31 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety
Communications

 

  

Then it is a federal matter  and not that I am much good with this 
legal stuff ... but no matter where you are, it is illegal to divulge 
what you hear to a 3rd party ... that would include a re-broadcast via 
IP or radio anyway?? So with that, aren't all the scanner sites illegal?

James

Paul Plack wrote:


 Don, the copy of the statute you quoted specifically exempts 
 communications transmitted ...for the use of the general public, 
 including Amber Alerts.
 
 What I want to know is, what if you set up across the state line with 
 a yagi, and put it on the web from there? Your QTH would be just the 
 place from which to do it! Nyah-nyah, Illinois!
 
 73,
 Paul, AE4KR





[Repeater-Builder] Radio Parts available in NZ

2010-02-18 Thread DeanP
Hi Folks,

I was wondering if there is any interest in some radio kit that I am removing 
here in New Zealand.
My apologies first of all, I'm not a radio ham or enthusiast I just happen to 
be running a project where we are removing A LOT of kit.
I feel that its criminal to scrap it when there are people who may have an 
interest in it, considering some items are near new and cost over $1000 per 
unit to make scrapping it is my last option.

I have the following available, items were working when removed.

Tait - T838-10 PA
Tait - 837-20 Exciter
Tait - 835-20 Reciever
Tait - 855-10 Reciever
Tait - 856-10 Transmitter
Tait - Duplexer
Tait - 359-02 Speaker Panel
Chassis and PSU

I also have 100+ duplexers for 158-161? which I believe is somewhere in the 
middle of the NZ marine band?

I also have a large quantity of Tait 489D radios, these are in pairs to work 
with the duplexers and also a large quantity of Motorola RTs of a slightly 
newer age - perhaps mid to late 90's

If you have any use for these or know anyone who would and would like to make 
an offer drop me a line, proceeds will go to charity, please remember these are 
in New Zealand.



Re: [Repeater-Builder] VHF Decibel Duplexer

2010-02-18 Thread Tim Sawyer
I need to notch 145.16 out of my receiver. Do you think it would tune down
that low?

On Thu, Feb 18, 2010 at 2:25 PM, skipp025 skipp...@yahoo.com wrote:



 Re: VHF Decibel Duplexer

 I should probably buy this... or at least bid on it. But I'm
 making a serious effort to revive my 12 Step Junk Ender's Program
 participation. So I'll pass this on to one of you to hopefully
 take advantage of. It's a great Deal for what this is...

 Ebay Item Number: 150413877464
 Decibel Products VHF TR Duplexer

 You're not restricted to using this unit as a duplexer... The
 circuit is two paths of notch cavities (tuned circuits) so you
 can get quite creative.

 You could also use it as a commercial vhf repeater duplexer and
 or a non-standard offset ham repeater duplexer.

 good luck,
 s.

  




-- 
:wq
Tim


[Repeater-Builder] Low voltage disconnect in Alberta winters and more

2010-02-18 Thread Tony VE6MVP

Folks

I've been reading the low voltage disconnect thread with a great deal 
of interest.  Thanks for the tips and suggestions.  We're putting up 
a VHF repeater and two UHF link radios on a solar/wind power 
site.Given Alberta winters what would you folks suggest as a low 
voltage disconnect value to avoid the batteries freezing in 
winter?  Which can hit -40 for a few days.


Also we're thinking of having a backup power generator being a lawn 
mower motor hooked up to an auto style alternator and a rioughly 
eight or ten hour fuel tank.If the batteries get too low then 
we'll just attempt to get into the site,  fire up that home made 
generator and walk away.   We'll make sure it looks like a rusty 
piece of garbage so no one who wanders by is likely to steal 
it.   Any comments?


(Apparently the snow drifts can get quite bad so we might need to 
borrow a snowmobile for the last 400 yards or so.)


We're thinking of putting the batteries in a chest freezer disguised 
by thin plywood so it just looks like a box.   We're told by the site 
owner that a fridge looks way too much like trailer trash so 
disguising it with wood should work.I'm thinking we would put the 
charge controller in there for a little heat and the dump load in winter


Are we nutz?   Have I asked some stupid questions?

Tony 

Re: [Repeater-Builder] Unlawful in Il to Rebroadcast Public Safety Communications

2010-02-18 Thread Kris Kirby
On Thu, 18 Feb 2010, James Delancy wrote:
 Then it is a federal matter  and not that I am much good with this 
 legal stuff ... but no matter where you are, it is illegal to divulge 
 what you hear to a 3rd party ... that would include a re-broadcast via 
 IP or radio anyway??  So with that, aren't all the scanner sites 
 illegal?

Four points:

1) No station outside of Shortwave, TV, FM, or AM services are legally 
   authorized to broadcast.

2) The Communications Act of 1934 and The Telecommunications Act of 1996 
   govern this. RF is the FCC's domains, unless someone really wants to 
   rehash States Rights during this administration.

3) The use of the internet is governed by the FCC, through the divisions 
   the telcos use, under the name they use: Common Carrier.

4) Interference with a common carrier is a FEDERAL offense, punishable 
   by fine and/or jail time. 

On the point of #4, if a police officer pulls over a legally operated 
and authorized semi-trailer carrying a sealed load across state lines 
and tells the driver to break the seal on the trailer, that officer is 
interfering with interstate commerce and may be be arrested by the US 
Marshals. 

My advice? Don't test this law. If you do test this law and officers 
show up to arrest you, immediately call the US Marshals office. 

Oh -- get a good lawyer, and make him a rich man.

And further -- it is impossible to broadcast over the internet or IP. 
There are mechanisms which work similar to the common-sense concept of 
broadcasting, but properly designed networks do not allow such packets 
to traverse the networks or the edges of the networks. Multicast, which 
is a broadcast like IP-based system has not been deployed on large 
scale basis by most providers. Like 99.999% of them. And they charge 
good money if your packets need to be in all places at one time -- 
that's X amount of bandwidth taken from ALL of thier pipes that 
service your points of interest. 

It's time for a repeal of that law, and a recall election to remove that 
member of the legislature from office.

--
Kris Kirby, KE4AHR
Disinformation Analyst


Re: [Repeater-Builder] Low voltage disconnect in Alberta winters and more

2010-02-18 Thread Kris Kirby
On Thu, 18 Feb 2010, Tony VE6MVP wrote:
 Also we're thinking of having a backup power generator being a lawn 
 mower motor hooked up to an auto style alternator and a rioughly eight 
 or ten hour fuel tank.If the batteries get too low then we'll just 
 attempt to get into the site,  fire up that home made generator and 
 walk away.   We'll make sure it looks like a rusty piece of garbage so 
 no one who wanders by is likely to steal it.   Any comments? 

Generators and fuel are a lot of trouble. 
 
 (Apparently the snow drifts can get quite bad so we might need to borrow a 
 snowmobile for the last
 400 yards or so.)

This is when you have to ask yourself: Is it really worth the hardship 
to keep this repeater on the air at this site?

 We're thinking of putting the batteries in a chest freezer disguised 
 by thin plywood so it just looks like a box.   We're told by the site 
 owner that a fridge looks way too much like trailer trash so 
 disguising it with wood should work.I'm thinking we would put the 
 charge controller in there for a little heat and the dump load in 
 winter
 
 Are we nutz?   Have I asked some stupid questions?

Yes, and no. For the former, you're in good company. The freezer idea 
isn't new; there's one repeater up somewhere in Canada that is near a 
rock peak mounted in a large freezer. It, along with the repeater 
trustees, were flown in with a helicopter. 

For your situation, it might be best to use a pair of freezers, and 
install a hasp and padlock on them. Put the batteries in one (or both) 
and the repeater in the other. If you can find self-resetting circuit 
breakers, I would use those for the batteries, and individually protect 
each battery from a common bus. This way, if you develop a shorted cell 
in one battery, or a dead-short across several or the battery itself, 
the problem becomes self-isolating. Of course, you have to be able to 
develop enough power from the other batteries to exceed the circuit 
breaker's trip rating. 

You'd be better off using fishing batteries than lawn garden batteries. 
Don't forget to make a gas collection/vent system using aquarium tubing 
or surgical tubing. Well, if you need a gas collection system, you don't 
have sealed lead acid (SLA) batteries, which means you're adding 
electrolyte or water a few times a year. SLA is the better way to go, 
but you have to watch the battery temperatures to prevent damage to the 
batteries during the warm months or when charging on a really good power 
day. Damage means the battery vents, and that's no good. So you need a 
good charge controller, and decent diversion load. 

I suppose if one was really inventive and handy with some metal tools, 
you could make a vertical rack and suspend a large weight from it. Then 
attach a screw/gear lift motor from the diversion system, and have a 
small, regulated generator from a different gear ratio making a few 
watts of power. 

10,000 feet of wire-rope and an old oil well

--
Kris Kirby, KE4AHR
Disinformation Analyst


[Repeater-Builder] Re: VHF Decibel Duplexer

2010-02-18 Thread skipp025



 Tim Sawyer tisaw...@... wrote:
 I need to notch 145.16 out of my receiver. Do you think 
 it would tune down that low?

It should... but I can't promise frequency coverage that low. 
Consider this duplexer two very nice notches you can put in 
the standard VHF High Band range, each just not within a MHz or 
two of each other without more serious performance degradation. 
I've got more than one similar unit (I use these duplexers all 
the time) so maybe it's time to crank one down to see how 
low the resonators will go without physical modification. 

You could to all the notch networks in one path side to 
a specific frequency and separate the two sides of the 
duplexer or use them both for different tasks. 

There are many possible applications for these type of 
notch-pass duplexers. It's just that everyone wants narrow 
600KHz offset packages for conventional ham repeater 
operation. But if you need to notch something out, it's hard 
to beat the deal or use it for a 152/159 commercial ham 
box. 

Another cute idea... separate the two paths within the duplexer 
for use on a separate tx/rx (dual) antenna repeater. The notch in 
the rx side (antenna lead/path) is tuned to the tx frequency 
and the converse for the other path. 

There are six very useful notch resonator networks in the box 
and they can be used in various combination for many things.  

s. 

  skipp025 skipp...@... wrote:
  Re: VHF Decibel Duplexer
 
  I should probably buy this... or at least bid on it. But I'm
  making a serious effort to revive my 12 Step Junk Ender's Program
  participation. So I'll pass this on to one of you to hopefully
  take advantage of. It's a great Deal for what this is...
 
  Ebay Item Number: 150413877464
  Decibel Products VHF TR Duplexer
 
  You're not restricted to using this unit as a duplexer... The
  circuit is two paths of notch cavities (tuned circuits) so you
  can get quite creative.
 
  You could also use it as a commercial vhf repeater duplexer and
  or a non-standard offset ham repeater duplexer.
 
  good luck,
  s.
 
   
 
 
 
 
 -- 
 :wq
 Tim





[Repeater-Builder] Re: Low voltage disconnect in Alberta winters and more

2010-02-18 Thread skipp025
Hi Tony, 

 Tony VE6MVP t...@... wrote:
 Folks
 I've been reading the low voltage disconnect thread with 
 a great deal of interest. Thanks for the tips and suggestions. 
 We're putting up a VHF repeater and two UHF link radios on 
 a solar/wind power site. 

The event will be quite the learning experience... 

 Given Alberta winters what would you folks suggest as a low 
 voltage disconnect value to avoid the batteries freezing in 
 winter?  Which can hit -40 for a few days.

Are you planning to disconnect the batteries based on low 
voltage, (low/high) temp or both conditions? 

 Also we're thinking of having a backup power generator being a lawn 
 mower motor hooked up to an auto style alternator and a roughly 
 eight or ten hour fuel tank.If the batteries get too low then 
 we'll just attempt to get into the site,  fire up that home made 
 generator and walk away.   We'll make sure it looks like a rusty 
 piece of garbage so no one who wanders by is likely to steal 
 it.   Any comments?

The Gas Genset is kind of an inconvenient popcorn fart but heck 
any port in a storm when you've got nothing better. You might 
find a... or convert the gas motor to propane, try and find an 
electric start engine and have a timer and or logic from the Low Voltage 
Disconnect fire the charger system engine up and give the batteries a charge. 
Propane is a lot easier to deal with... and 
probably safer. Otherwise you can find TEG Thermal Electric 
Generators on the used market and they in theory have no moving 
parts. 

There are tricks you can use to discourage vandals, which 
can be talked about in direct Emails if you need that type 
of information. 

 (Apparently the snow drifts can get quite bad so we might 
 need to borrow a snowmobile for the last 400 yards or so.)

A set of 10 gallon propane tanks are easier to haul than the 
equivalent gasoline tanks... less messy to use and safer. Propane 
engines tend to be self priming and that's a very nice feature.

 We're thinking of putting the batteries in a chest freezer 
 disguised by thin plywood so it just looks like a box. We're 
 told by the site owner that a fridge looks way too much like 
 trailer trash so disguising it with wood should work. I'm 
 thinking we would put the charge controller in there for a 
 little heat and the dump load in winter

Consider some of what I call non shinny diamond plate sheet metal 
cover plates shot onto the freezer box properly and strongly 
secured both to the ground and the box with safety screws and 
strong security head lag nuts. Put the wood over it if you 
like... but protect it first. 

Rare is the case where you'll have to dump generated energy 
unless your charging system is way overkill.  Otherwise, use 
the load dump to heat the box or building. 

 Are we nutz?   Have I asked some stupid questions?
 Tony

(history or the world...) It's spelled nvts.  

Your questions are valid and Kris had some good ideas in his 
post. 

cheers, 
s. 




Re: [Repeater-Builder] Radio Parts available in NZ

2010-02-18 Thread Gareth Bennett
How many Tait T800 bins do you have?  Are these Maritime NZ  25 KHz VHF with 
UHF I Band  T855/856 links?

Series 1 or Series 2

Cheers,
Gareth
  - Original Message - 
  From: DeanP 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, February 19, 2010 3:53 PM
  Subject: [Repeater-Builder] Radio Parts available in NZ



  Hi Folks,

  I was wondering if there is any interest in some radio kit that I am removing 
here in New Zealand.
  My apologies first of all, I'm not a radio ham or enthusiast I just happen to 
be running a project where we are removing A LOT of kit.
  I feel that its criminal to scrap it when there are people who may have an 
interest in it, considering some items are near new and cost over $1000 per 
unit to make scrapping it is my last option.

  I have the following available, items were working when removed.

  Tait - T838-10 PA
  Tait - 837-20 Exciter
  Tait - 835-20 Reciever
  Tait - 855-10 Reciever
  Tait - 856-10 Transmitter
  Tait - Duplexer
  Tait - 359-02 Speaker Panel
  Chassis and PSU

  I also have 100+ duplexers for 158-161? which I believe is somewhere in the 
middle of the NZ marine band?

  I also have a large quantity of Tait 489D radios, these are in pairs to work 
with the duplexers and also a large quantity of Motorola RTs of a slightly 
newer age - perhaps mid to late 90's

  If you have any use for these or know anyone who would and would like to make 
an offer drop me a line, proceeds will go to charity, please remember these are 
in New Zealand.