Re: [Repeater-Builder] AND NOW FOR SOMETHING COMNPLETELY DIFFERENT!!!

2006-01-17 Thread Ted Bleiman K9MDM - MDM Radio



looking!!Kevin Custer <[EMAIL PROTECTED]> wrote:  Ted Bleiman K9MDM - MDM Radio wrote:> ANY MORE SPECTRATAC CARDSFor sale, or you need some???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/








Ted Bleiman K9MDM
MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com - 
Check it now!!
 
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RE: [Repeater-Builder] Repeater Receive Preamp

2006-01-17 Thread Eric Lemmon





The decision whether (or 
not) to add a preamp to the receive side of a repeater should be made after 
carefully evaluating your installation.  As many others have preached 
(besides me!), a receive preamp is *not* a cure-all; indeed, it may create new 
problems rather than solving old problems.
 
First of all, your 
antenna should be the optimum design for your station, balancing gain and 
pattern with "duplexability."  The highest-gain antenna available is not 
always the best choice, especially if the repeater site is at a high 
elevation.  Downtilt antennas have very "spoky" patterns, and should be 
evaluated very carefully.
 
Your feedline should be 
as good as, and as low-loss as, you can afford.  My rule of thumb is to 
*always* select a feedline that has no more than 1.0 dB of attenuation at the 
receive frequency.  Don't be compelled to put your antenna at the 500 foot 
level of a tower, simply because the tower is 500 feet tall.  Five hundred 
feet of too-small feedline can have a *lot* of loss, and it's possible that the 
repeater will work far better just 50 feet above ground.
 
As Chip Angle has pointed 
out in his excellent application notes, a receive preamp should *always* be 
preceded by an effective bandpass cavity filter.  Such a filter not only 
greatly attenuates your repeater's transmitter carrier, but it also keeps out 
all of the other carriers that can desense your receiver.  Go 
here:
 
http://www.anglelinear.com/repeaters/repeaters.html
 
A notch-only duplexer is 
perhaps not the best choice for a repeater- especially in a high-RF 
environment.
 
73, Eric Lemmon WB6FLY 
 
 


From: Repeater-Builder@yahoogroups.com 
[mailto:[EMAIL PROTECTED] On Behalf Of 
[EMAIL PROTECTED]Sent: Tuesday, January 17, 2006 9:10 
AMTo: repeater-builder@yahoogroups.comSubject: 
[Repeater-Builder] Repeater Receive Preamp

Interested in the idea of placing a preamp on the Rx side to increase HT 
coverage.  I've read in an article they should not be used with 
Notch-Reject Duplexers though...we have one.  Thoughts were to place it in 
the line between the duplexer and Rx radio on a duplexed, single antenna 
repeater setup.  Any successes or failures with using a preamp w/ this type 
of 
duplexer?













  




  
  
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Re: [Repeater-Builder] Higher Output Exciter

2006-01-17 Thread ka2ajh
Thanks for the information Kevin,
I have some factory made 5 watt, 3dB attenuators. If your custom made 10 watt 
amp was turned down to five watts and the attenuator was used I could get my 
2.5watts for the one PA and my 5-10 watts without the attenuator for the other. 
Do you see any problem using the attenuator with your PA so I could drive the 
lower power input PA if I needed?
What does Repeater Builder (the business) get for the Custom 10 watt amp?

Thanks JIM  KA2AJH


 Kevin Custer <[EMAIL PROTECTED]> wrote: 
> Jim Cicirello wrote:
> 
> >Hello to Kevin and the group.
> >Still another amplifier question: In my case I have a great Micor 
> >Repeater and I have a need to increase the output of the exciter to 
> >either 3-5 watts or 5-10 watts to drive some commercial amplifiers 
> >that operate in that INPUT range. I am wondering what is the best 
> >way to get that kind of drive, from the existing 400-500 Mw Drive I 
> >have from the Micor Exciter.
> >  
> >
> 
> Have Repeater Builder (the company) build you a custom 2 to 10 watt IPA. 
> (Intermediate Power Amplifier)
> Since you said the exciter is putting out 400 mW, I'm assuming you need 
> one for 2M or High-Band, but maybe you mean something else.
> 
> Here are some pictures of a 10 watt 2 meter unit that is stable and 
> adjustable from 5 to 12 watts.  The 'secret' is in the custom wound 
> output transformer.  Also note the metering shunt that enables the 
> original metering socket to work.  I also build a similar version with 
> only one transistor that is stable from .5 to 3 watts.  Mathew Quaife, 
> N9LV is running one of these (the prototype) and maybe he will comment 
> on how it is working for him.
> 
> Let me know...
> Kevin Custer
> Pictures Below:
> 
> 
> 
> 
> 
> 
> 
>




 
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Re: [Repeater-Builder] AND NOW FOR SOMETHING COMNPLETELY DIFFERENT!!!

2006-01-17 Thread Kevin Custer
Ted Bleiman K9MDM - MDM Radio wrote:

> ANY MORE SPECTRATAC CARDS


For sale, or you need some???




 
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Re: [Repeater-Builder] IFR Help

2006-01-17 Thread Q
The tone generator is the 4 digit thunmbwheel in the lower left 
of the front panel,format is XXX.X ,the pot sets the level. Make 
surethe int/ext mod is in internal and dial away! I sure do miss 
my IFR,had to sell due to hard times...73,Lee

Jim McLaughlin wrote:
> I recently inherited a IFR FM/AM 1000S service monitor. Yes a free
> thing! I do NOT have a manual yet but will in a couple of weeks. I am
> working on a couple of GTX's and want to check the sensitivy of a
> couple of modes.
> 
> The CSQ generated signals work just fine but when I needed to add pl 
> with the
> signal , I simply don't know how to do it with the dials right in 
> front of me.
> 
> Cardinal went through it a couple of months ago and I suppose I 
> could call him and ask but I thought maybe somebody here could tell 
> me how to do it, if it's easy. 
> 
> I know that the IFR can do it as the previous owner, now a 'SK' 
> often did it. I just didn't pay attention I guess and always used 
> the Cushman and not the IFR. Thanks for anything.
> 
> Jim  WA9FPT




 
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Re: [Repeater-Builder] B & D Enterprises 1P controller

2006-01-17 Thread Kevin Custer
hl31943 wrote:

>I'm looking for some guidance. If I set the 1P up for 6dB de-emphasis, 
>I don't have enough audio to sufficiently modulate the transmitter. If 
>I option the 1P for gain (no de-emphasis), the DTMF no longer 
>responds, but I do have enough gain for good modulation.  Should I add 
>a LM386 and go with the de-emphasis?
>

That is one option, but I guess we should ask you where you are getting 
the audio from?

> I'm using this with a Mitrek.
>  
>

Give us some detail on its connections to the radio set.

>Also, is B & D still around? The number I have is no longer good.
>

The last time I heard, Boyd Potts had possibly moved.  I see his website 
is no longer in service, so I doubt there is any factory service 
available.  YMMV.

Kevin Custer




 
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[Repeater-Builder] AND NOW FOR SOMETHING COMNPLETELY DIFFERENT!!!

2006-01-17 Thread Ted Bleiman K9MDM - MDM Radio



ANY MORE SPECTRATAC CARDS  MDM








Ted Bleiman K9MDM
MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com - 
Check it now!!
 
	
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Re: [Repeater-Builder] Repeater Receive Preamp

2006-01-17 Thread Kevin Custer






I'd try one between the RX port of the duplexer and receiver and see
what happens.  The addition of a preamp depends as much on site
conditions as the equipment you use.  If necessary, you could easily
add a Band Pass cavity between the RX port of the duplexer and the
input of the preamp.

[EMAIL PROTECTED] wrote:

  
  
  
  Interested in the idea of placing a preamp on the Rx side to
increase HT coverage.  I've read in an article they should not be used
with Notch-Reject Duplexers though...we have one.  Thoughts were to
place it in the line between the duplexer and Rx radio on a duplexed,
single antenna repeater setup.  Any successes or failures with using a
preamp w/ this type of duplexer?
  














  




  
  
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Re: [Repeater-Builder] Non-Funny interference story

2006-01-17 Thread Jim B.
Dave VanHorn wrote:

> FWIW, this is the same VHF kenwood that will melt it's own solder 
> joints at 22W output using a transistor rated for 110W continuous.. 
> My Daniels amp is the same physical size as the power amp on the 
> kenwood, outputs 40W, and never gets above 100F.   I don't think the 
> final had much/anything to do with this problem, but I do think it's 
> very badly designed. 

There is other problems with this. I expect a major problem with the 
output circuits or the duplexer, if there is one. Those normally run at 
30-45W out in continuous duty with no problems.
And I doubt that transistors rating are correct. I know Tait was trying 
to do 100W continuous duty with one transistor, and failed miserably. 
Even in intermittent use the collector lead would unsolder itself on a 
regular basis.
I expect a proper rating for it would be more like 50W continuous.
-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] Re: Repeater Funding

2006-01-17 Thread Vincent Caruso



Couldn't have said it better myself

Jim B. wrote:
> Dan Babilla wrote:
> 
> 
>>Best bet is to get with either a City or County Emergency MAnagement group
>>and work a site from that angle,
> 
> 
> Two words:
> Tall hospitals...















  




  
  
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Re: [Repeater-Builder] Re: Kenwood TKB-720 CPU failure

2006-01-17 Thread Jim B.
Coy Hilton wrote:
> DId you try a full reset of the radio...that might help. I would try 
> it before replacing it.

There's no reset on those. Turning it off is the only reset.

-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] MAXAR UHF radios for link.

2006-01-17 Thread Jim B.
Bruno Bouliane wrote:

> Has anyone worked with Maxar uhf radios for linking. We're looking to
> install these radios as X-band transmit units for our voting system.
> We`re using GE Pheonix radios but would like to try True FM.. The
> Pheonix were convenient because they are programmable. The Maxar`s
> would be set up with GE MVP monitor receivers and would be hooked
> with flat audio straight thru to  the voting site.

I'm pretty sure the Phoenix-S and -SX are direct FM, but regardless, the 
Maxar/Moxy line will work very well for link transmitters. Throttle the 
output down to abt 5-10W, less if you get the 10W Moxy version.

I forget exactly where to feed audio, but it will be fairly near the 
deviation pot for the type of link you're using. And at that, it should 
pass incoming PL tone fairly well.

Another angle would be to find some UHF MVP's and swap in the VHF rx 
section. They are interchangable, can be easily duplexed, and give you a 
complete package in one box, less pwr supply.

-- 
Jim Barbour
WD8CHL





 
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Re: [Repeater-Builder] Re: Repeater Funding

2006-01-17 Thread Jim B.
Dan Babilla wrote:

> Best bet is to get with either a City or County Emergency MAnagement group
> and work a site from that angle,

Two words:
Tall hospitals...
-- 
Jim Barbour
WD8CHL





 
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[Repeater-Builder] B & D Enterprises 1P controller

2006-01-17 Thread hl31943
I'm looking for some guidance. If I set the 1P up for 6dB de-emphasis, 
I don't have enough audio to sufficiently modulate the transmitter. If 
I option the 1P for gain (no de-emphasis), the DTMF no longer 
responds, but I do have enough gain for good modulation.  Should I add 
a LM386 and go with the de-emphasis? I'm using this with a Mitrek. 
Also, is B & D still around? The 
number I have is no longer good.

Howard
WB4GUD









 
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[Repeater-Builder] GE Phoenix SX modded for 1-1/4M band

2006-01-17 Thread Broncus
I was referred here for possible information from the 220 group.

I am looking to modify a GE Phoenix SX radio for use on the 1-1/4M 
band. I am looking for the receive and transmit modifications that 
need to be done. I think I have a line on the programming portion of 
the task.

Anyone been there done that? Website link maybe?

Thank you!


Best regards,
Fred











 
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[Repeater-Builder] GE Phoenix SX mod for 6M

2006-01-17 Thread Broncus
As long as I am asking about the 220 mod I figured I may as well ask 
about a 6M mod.

I am looking to modify a GE Phoenix SX radio for use on the 6M band. I 
am looking for the receive and transmit modifications that need to be 
done. I think I have a line on the programming portion of the task.

Anyone been there done that? Website link maybe?

Thank you!


Best regards,
Fred










 
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[Repeater-Builder] Re: Repeater Receive Preamp

2006-01-17 Thread w4cng
For best performance you will need in the order of 120db isolation 
between TX and RX.  It generally takes a duplexer with 6 cans 3 on each 
side with a band pass, band reject mode of operation.  6 cans with 
notch only will not make the grade.  Then do not go overboard on the 
gain.  Stay with something in the order of 7-10db with under 1 db noise 
figure.  There are a few folks out there that sell units that have been 
in use for many years.

Good Luck
Steve W4CNG



--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
> Interested in the idea of placing a preamp on the Rx side to increase 
HT  
> coverage.  I've read in an article they should not be used with  
Notch-Reject 
> Duplexers though...we have one.  Thoughts were to place it in  the 
line between 
> the duplexer and Rx radio on a duplexed, single antenna  repeater 
setup.  Any 
> successes or failures with using a preamp w/ this type  of duplexer?
>









 
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[Repeater-Builder] Re: Antenna gurus?

2006-01-17 Thread lcradio2002
Stacking them vertically will compress the vertical radiation pattern,
which is what you want.  I think the proper spacing would be closer to
1/2 wavelength.

Tracy

--- In Repeater-Builder@yahoogroups.com, Kris Kirby <[EMAIL PROTECTED]> wrote:
>
> 
> I'm loathe the cross-post this, but I haven't seen an answer on AR902 
> yet 
> 
> I'm looking for some assistance from an antenna guru. I have a few
902MHz 
> patch antennas which are listed as having 'linear' polarization and
6dBi 
> of gain. The beamwidth is 70 degrees in both planes (H & V). I'm
looking 
> at deploying the antennas stacked with a splitter harness that will 
> seperate them into four phased antennas, similar to Decibel's DB224 
> antenna, but with patch panels instead of folded dipoles.
> 
> Anyway, I want to maintain the 70-degree horizontal beamwidth of the 
> antenna, but compress the vertical beam. Which way to I need to
mount the 
> antennas? All in a line vertically seperated by 1 wavelength, or on a 
> horizontal pipe mounted across the face of the tower?
> 
> For some reason my normally sharp mind isn't coming up with square
numbers 
> on this one at the moment.
> 
> --
> Kris Kirby, KE4AHR <[EMAIL PROTECTED]>
>"BIG BROTHER IS WATCHING YOU!"
>  This message brought to you by the US Department of Homeland Security
> 
> 
>  
> Yahoo! Groups Links
>








 
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[Repeater-Builder] Repeater Receive Preamp

2006-01-17 Thread KFD29





Interested in the idea of placing a preamp on the Rx side to increase HT 
coverage.  I've read in an article they should not be used with 
Notch-Reject Duplexers though...we have one.  Thoughts were to place it in 
the line between the duplexer and Rx radio on a duplexed, single antenna 
repeater setup.  Any successes or failures with using a preamp w/ this type 
of duplexer?













  




  
  
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[Repeater-Builder] Re: SpectraTac receiver on 12v

2006-01-17 Thread Bob M.
I scanned the fold-out page, then made three files out
of them. I uploaded them to a server so you can get
them at your leisure. Each one is close to 1MB. You
should be able to cut-and-paste each link below into a
browser and retrieve the three images. Save each one
and print/view as necessary.

http://home.comcast.net/~wa1mik/layout.jpg
http://home.comcast.net/~wa1mik/parts.jpg
http://home.comcast.net/~wa1mik/schema.jpg

It looks like that emergency tone output can easily be
defeated by cutting or grounding one wire coming out
of the power supply. In fact, that entire 556 IC is
only used for creating the tone.

Hope this matches your unit. Let me know when you've
retrieved the files so I can delete them and recover
some storage space.

Bob M.
==
--- "Steven Passmore, kf6fkk" <[EMAIL PROTECTED]>
wrote:

> Thanks to all who responded on this.  I had only
> planned to run the receiver on 
> 12v as a diagnostic measure to isolate the power
> supply as the problem. Hearing 
> that quite a few others have experienced the problem
> makes me relatively sure 
> that the caps are in fact bad.
> 
> Bob M. If it isn't too much of a problem a scan of
> the pages you mentioned 
> would be very much appreciated.
> 
> I wont be near the receivers until this weekend but
> will definitely take a look 
> at the supplies.
> 
> Thanks,
> Steve Passmore
> 
> 
> - Original Message - 
> From: "Bob M." <[EMAIL PROTECTED]>
> To: 
> Sent: Monday, January 16, 2006 4:48 AM
> Subject: Re: [inbox] [Repeater-Builder] SpectraTac
> receiver on 12v
> 
> > I have a full manual on the SpectraTAC receiver. I
> > could send you the schematic, board layout, and
> parts
> > list if that would help. I can either scan them
> and
> > put them up somewhere, or make copies and mail
> them to
> > you.
> >
> > Bob M.

__
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[Repeater-Builder] Higher Output Exciter

2006-01-17 Thread Jim Cicirello
Hello to Kevin and the group.
Still another amplifier question: In my case I have a great Micor 
Repeater and I have a need to increase the output of the exciter to 
either 3-5 watts or 5-10 watts to drive some commercial amplifiers 
that operate in that INPUT range. I am wondering what is the best 
way to get that kind of drive, from the existing 400-500 Mw Drive I 
have from the Micor Exciter.

Also has anyone had any experience with the PagePro Exciter by Sonix 
Tech. in CA? This is a synthesized 1.5 ppm Paging Exciter Model DPM-
150-SX. I have been told the output is adjustable up to about six 
watts. Any comments about using one of these for repeater use? They 
are VHF in the 150.XXX Paging Freq. and MAY program to the 2-meter 
band. 

As always thanks for sharing your experience and advice.

73 JIM  KA2AJH











 
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Re: [Repeater-Builder] Shipping an antenna - roofrack

2006-01-17 Thread Neil McKie

  You might consider visiting your local 2-way radio repair shop - 
 ask them for an antenna shipping container the next time comes in. 

  Neil - WA6KLA 

[EMAIL PROTECTED] wrote:
> 
> Perhaps ^under^ the veh -- a few bungies to the bumpers -- ??  
> BTDT: (had a bunch of ground-clearance to work with.)
> 
> > "Bob M." wrote:
> > No roof rack on a rental sedan from an airport.
> > No roof rack on my car or truck, besides it would interfere with
> the roof-mounted dual-band antennas - can't have that.
> 
>





 
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Re: [Repeater-Builder] Looking for 800/900 hybrid

2006-01-17 Thread John J. Riddell
Jeff,   did you find one yet...I have one here...
John VE3AMZ



- Original Message - 
From: "Jeff DePolo WN3A" <[EMAIL PROTECTED]>
To: 
Sent: Tuesday, January 03, 2006 3:04 PM
Subject: [Repeater-Builder] Looking for 800/900 hybrid


> 
> Anyone have a hybrid out of an 800/900 MHz combiner or the like?  Needs to
> work at 950 MHz.  I don't need an entire combiner, just a hybrid.  Thanks.
> 
> --- Jeff
> 
> Jeff DePolo WN3A - [EMAIL PROTECTED]
> Broadcast and Communications Consultant 
> 
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 




 
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[Repeater-Builder] Re: Repeater morse or voice identification

2006-01-17 Thread Larry Wilson

http://www.com-spec.com/id8.htm

--- In Repeater-Builder@yahoogroups.com, "Rui Martins" <[EMAIL PROTECTED]> 
wrote:
>
> Hi there.
> 
> Where can i find this???
> Possible construction(morse)
> 
> 
> Regards
> RM
>










 
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Re: [Repeater-Builder] Shipping an antenna - roofrack

2006-01-17 Thread N8BQN

Perhaps ^under^ the veh -- a few bungies to the bumpers -- ??  
BTDT: (had a bunch of ground-clearance to work with.)


> "Bob M." wrote:
> No roof rack on a rental sedan from an airport.
> No roof rack on my car or truck, besides it would interfere with
the roof-mounted dual-band antennas - can't have that.






 
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Re: [Repeater-Builder] Shipping an antenna

2006-01-17 Thread Bob M.
No roof rack on a rental sedan from an airport.

No roof rack on my car or truck, besides it would
interfere with the roof-mounted dual-band antennas -
can't have that.

I could drive my truck to the airport and tie it into
the bed; only a few feet would stick out the back.
That would seem to be the only way to get it home. I
think it would be easier to pay UPS to ship and
deliver it. Now I just have to get my friend to put it
in a tube and get it to his UPS depot.

Bob M.
==
--- Mike Morris <[EMAIL PROTECTED]> wrote:

> At 06:48 PM 1/16/06, you wrote:
> 
> >No the antenna is NOT able to be made shorter. I
> think
> >either UPS or FedEx will take up to 160 inches of
> >length plus girth, so we should be OK. Someone else
> >suggested sending it as checked luggage, which is a
> >possibility, except for the problem of getting it
> from
> >the airport to me. A 10ft antenna won't fit into
> the
> >vehicle and no one wants to drive an hour with the
> >windows open in February in CT.
> >
> >Bob M.
> 
> Does any available vehicle have a roof rack?
> I've hauled three 22' super stationmasters on a roof
> rack
> on a Volvo 145 station wagon a few years ago
> 
> Did get a few funny looks from a few CHP officers,
> and
> one San Bernardino Sheriffs officer pulled alongside
> at
> a stop light, rolled down his window, and said
> "gotta be
> a ham radio operator..."
> I said "Yup", then he introduced himself as a KB6
> ...
> 
> Mike WA6ILQ

__
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Re: [Repeater-Builder] IFR Help

2006-01-17 Thread N9LLO




The 1000 series only has one tone generator, you must use it for PL OR test tone. If you want both you must use an external tone generator for the second tone.
 
Chris
 













  




  
  
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Re: [inbox] [Repeater-Builder] SpectraTac receiver on 12v

2006-01-17 Thread Steven Passmore, kf6fkk
Thanks to all who responded on this.  I had only planned to run the receiver on 
12v as a diagnostic measure to isolate the power supply as the problem. Hearing 
that quite a few others have experienced the problem makes me relatively sure 
that the caps are in fact bad.

Bob M. If it isn't too much of a problem a scan of the pages you mentioned 
would be very much appreciated.

I wont be near the receivers until this weekend but will definitely take a look 
at the supplies.

Thanks,
Steve Passmore


- Original Message - 
From: "Bob M." <[EMAIL PROTECTED]>
To: 
Sent: Monday, January 16, 2006 4:48 AM
Subject: Re: [inbox] [Repeater-Builder] SpectraTac receiver on 12v

> I have a full manual on the SpectraTAC receiver. I
> could send you the schematic, board layout, and parts
> list if that would help. I can either scan them and
> put them up somewhere, or make copies and mail them to
> you.
>
> Bob M.





 
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