[Repeater-Builder] Motorola R2210B

[Grant]

Does anyone have a manual, operators and service for this older service 
monitor

[Repeater-Builder] Re: Sinclair duplexer Probe - Loop Pictures

[skipp025]

I like to save pictures, diagrams and information on the 
many types of duplexer (cavity) loops & probes. My archive 
folder started out real simple and small and has now grown 
into a fair size beast.  What's interesting to see is how 
same mfgrs changed their designs through the years. 

Just about the time I think I have most of the common designs 
archived... along comes another unknown or previously unseen 
loop or probe layout. Sometimes it seems to be about how many 
different hardware designs can complete the same or similar 
tasks. 

cheers, 
s. 

> [EMAIL PROTECTED] wrote:
> I always liked the transmission line BpBr implementation 
> - no capacitor plates to arc.  Very robust.
> Bob NO6B
>
>
> At 4/25/2008 15:20, you wrote:
> 
> >If you enjoy the art, science and construction of re-entrant
> >energy devices (loops and probe) within a duplexer... this
> >ebay auction has some nice pictures of how Sinclair did the
> >deed.
> >
> >enjoy
> >s.
> 

[Repeater-Builder] Dayton Hamvention Shipping (the easy way...)

[skipp025]

Dayton Hamvention Shipping (the easy way...) 

I've found the easy way to deal with sending things back from 
Dayton. Take shipping tape, pre-made address labels and related 
items with you. 

Box up whatever you want to send back... drive to the nearby 
Airport Fed Ex Office and send everything back to yourself 
Fed-Ex Ground. Use your own account if you have one. 

I do it every time... works great.  Later in the week when I'm 
back to ground zero nice boxes of boat anchor stuff and toys 
arrive without fail. 

cheers, 
s. 


> Ron Wright <[EMAIL PROTECTED]> wrote:
> At the Hamvention there is a shipping service.  They are 
> costly, but there.
> 73, ron, n9ee/r
> 
> 
> 
> >From: [EMAIL PROTECTED]
> >Date: 2008/04/25 Fri PM 11:38:59 CDT
> >To: Repeater-Builder@yahoogroups.com
> >Subject: Re: [Repeater-Builder] Repeater Power Amplifier sent in a
 paper bag
> 
> >
> >At 4/25/2008 20:58, you wrote:
> >
> >>There's a thread in one of the vintage stereo groups about
problems with
> >>shipping companies and their not honoring damage claims. UPS and FedEx
> >>seem to be the worst, with DHL better than the two.
> >
> >This is a good thread with Dayton coming up.
> >
> >Unfortunately there are no DHL shipping centers close to Hara.
> >
> >Bob NO6B
> >
> > 
> > 
> 
> 
> Ron Wright, N9EE
> 727-376-6575
> MICRO COMPUTER CONCEPTS
> Owner 146.64 repeater Tampa Bay, FL
> No tone, all are welcome.
>

[Repeater-Builder] ADI 247 for a link radio

[georgiaskywarn]

Started a project at the end of LAST summer and never got finished. 
Using a ADI247 as a 220mhz link radio. Blew something up in it (in
looking for cos), sent it off, got fixed, now just getting back to the
project.  *I Thought* I had decent tx audio out of it into the RC210
controller hooked to it.  However now I barely get a whisper out of my
tx audio.  I can hook a mic to it...no problem with the audio, works
fine.  Almost sounds like an impedance mismatch.

Ideas?
Thanks,
Robert
KD4YDC

RE: [Repeater-Builder] ADI 247 for a link radio

[Eric Lemmon]

Robert,

I agree- and the audio level needed by the RC210 is probably much greater
than what the radio has to offer.  An opamp should work for you.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn
Sent: Sunday, April 27, 2008 10:29 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] ADI 247 for a link radio

Started a project at the end of LAST summer and never got finished. 
Using a ADI247 as a 220mhz link radio. Blew something up in it (in
looking for cos), sent it off, got fixed, now just getting back to the
project. *I Thought* I had decent tx audio out of it into the RC210
controller hooked to it. However now I barely get a whisper out of my
tx audio. I can hook a mic to it...no problem with the audio, works
fine. Almost sounds like an impedance mismatch.

Ideas?
Thanks,
Robert
KD4YDC

[Repeater-Builder] DB-264E-A New 150 to 160 MHz etc.

[Richard Reese]

I have a DB-264E-A that is new never installed 150 to 160 MHz taking up space 
in the barn.   

Also have a PD-220 Super Station Master cut for 146.610.  Was installed for 
about 3 years.

Also have a PD-455 Super Station Master cut for 444.200.  Was installed for 
about 10 years.
***
Also the following:

3 Foot dish for 2.4 GHz
Have a pair of Directive Systems 2401 MHz Loop Yagis Model 1252LY  52 elements 
each

Have a Directive Systems 1296 MHz Loop Yagi Model 2355LY  55 elements 


Ask about other stuff you may need (antennas, amplifiers, repeater stuff etc.  
HF to 2.4 GHz.
I have sold the place after 30 +  years and moving to a smaller home.   Have to 
downsize.  Make an offer for any or all.  Pick up only.  Located near Akron 
Ohio - will not ship. 


Dick Reese
WA8DBW
330-329-8754

No virus found in this outgoing message
Checked by PC Tools AntiVirus (4.0.0.26 - 10.068.013).
http://www.pctools.com/free-antivirus/

[Repeater-Builder] Re: ADI 247 for a link radio

[georgiaskywarn]

Eric,
I was actually thinking of some 600 to 1 transformer.  Your thinking a
opamp / preamp would work?  Really didn't think about giving it more
audio level.  Now I am speaking of the TX audio, not RX. So it is
really what the RC210 is offering...not what the ADI is offering. 
Eric...you still think it needs an opamp??  
Thanks for the reply,
Robert
KD4YDC

--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Robert,
> 
> I agree- and the audio level needed by the RC210 is probably much
greater
> than what the radio has to offer.  An opamp should work for you.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn
> Sent: Sunday, April 27, 2008 10:29 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] ADI 247 for a link radio
> 
> Started a project at the end of LAST summer and never got finished. 
> Using a ADI247 as a 220mhz link radio. Blew something up in it (in
> looking for cos), sent it off, got fixed, now just getting back to the
> project. *I Thought* I had decent tx audio out of it into the RC210
> controller hooked to it. However now I barely get a whisper out of my
> tx audio. I can hook a mic to it...no problem with the audio, works
> fine. Almost sounds like an impedance mismatch.
> 
> Ideas?
> Thanks,
> Robert
> KD4YDC
>

[Repeater-Builder] F'S (DALLAS,TX) DB224-A

[Charles Mumphrey Kc5ozh]

Hello Group!
 Two of the Decibel DB224-A antennas have been donated to me for the
purpose of funding improvements to my Amateur-use machines. Recently
taken from tower service because of digital upgrading on their 154 MHz
systems. They are for sale, local pick-up in the Dallas, Texas area.
 Each has a harness and a set of pole clamps. Name Tags
faded/unrecognizable.  If interested, please respond "off-list" for
asking price, results of antenna analyzer, or wanted trading goodies for
these antennas.
 '73 and Thank You all for looking!
Charlie


"It is not the class of license the Amateur holds, but the class of the
Amateur that holds the license."

Charles Mumphrey
Amateur Radio Station Kc5ozh
Repeater System: 
Rowlett Main: 441.325 MHz + 162.2
Dallas: 441.950 MHz + 162.2
Rowlett II: 441.950 MHz + 110.9
Rowlett R.A.C.E.S. Unit 823
http://www.CharliesElectronics.com

RE: [Repeater-Builder] Re: ADI 247 for a link radio

[Eric Lemmon]

Robert,

Impedance matching is usually a problem when a low-impedance load is
connected to a high-impedance source, which sounds like what you describe.
When you use an impedance matching transformer, the audio level will be
reduced as well as the impedance, and you may not have enough audio.  I am
thinking along the lines of an emitter follower amplifier, which transforms
a high input impedance to a low output impedance, but implemented with an
operational amplifier (opamp).

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn
Sent: Sunday, April 27, 2008 3:14 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: ADI 247 for a link radio

Eric,
I was actually thinking of some 600 to 1 transformer. Your thinking a
opamp / preamp would work? Really didn't think about giving it more
audio level. Now I am speaking of the TX audio, not RX. So it is
really what the RC210 is offering...not what the ADI is offering. 
Eric...you still think it needs an opamp?? 
Thanks for the reply,
Robert
KD4YDC

--- In Repeater-Builder@yahoogroups.com
 , "Eric Lemmon" <[EMAIL PROTECTED]>
wrote:
>
> Robert,
> 
> I agree- and the audio level needed by the RC210 is probably much
greater
> than what the radio has to offer. An opamp should work for you.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
 
> [mailto:Repeater-Builder@yahoogroups.com
 ] On Behalf Of georgiaskywarn
> Sent: Sunday, April 27, 2008 10:29 AM
> To: Repeater-Builder@yahoogroups.com
 
> Subject: [Repeater-Builder] ADI 247 for a link radio
> 
> Started a project at the end of LAST summer and never got finished. 
> Using a ADI247 as a 220mhz link radio. Blew something up in it (in
> looking for cos), sent it off, got fixed, now just getting back to the
> project. *I Thought* I had decent tx audio out of it into the RC210
> controller hooked to it. However now I barely get a whisper out of my
> tx audio. I can hook a mic to it...no problem with the audio, works
> fine. Almost sounds like an impedance mismatch.
> 
> Ideas?
> Thanks,
> Robert
> KD4YDC

RE: [Repeater-Builder] Re: ADI 247 for a link radio

[Paul Plack]

I don't know if Radio Shack still even sells them, but over the years I've
run into a store and bought an LM 386 audio op-amp and a pre-etched
prototyping board to throw together an audio "buffer" for applications such
as this. The chip draws just 4 ma at idle, is optimized for audio use with
low parts count (just add two capacitors,) works with high-Z inputs and
8-ohm outputs, and can provide all the gain you need if configred properly.
 
When used to drive a speaker, the output is coupled through a large
electrolytic cap. If you're driving a 600-ohm load, you can reduce this to
.5 uF or less.
 
Be careful of "sample circuits" published using this chip. I've seen lots of
applications in which the amp was powered off a "12 volt" rail that could
actually be 14 volts; the chip is specified, I believe, for an absolute max
of 12 VDC. If you have a regulated DC stage at 8, 9 or 10 volts, that's
perfect.
 
73,
Paul, AE4KR

  _  

From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon
Sent: Sunday, April 27, 2008 5:02 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: ADI 247 for a link radio



Robert,

Impedance matching is usually a problem when a low-impedance load is
connected to a high-impedance source, which sounds like what you describe.
When you use an impedance matching transformer, the audio level will be
reduced as well as the impedance, and you may not have enough audio. I am
thinking along the lines of an emitter follower amplifier, which transforms
a high input impedance to a low output impedance, but implemented with an
operational amplifier (opamp).

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@ 
yahoogroups.com
[mailto:Repeater-Builder@ 
yahoogroups.com] On Behalf Of georgiaskywarn
Sent: Sunday, April 27, 2008 3:14 PM
To: Repeater-Builder@ 
yahoogroups.com
Subject: [Repeater-Builder] Re: ADI 247 for a link radio

Eric,
I was actually thinking of some 600 to 1 transformer. Your thinking a
opamp / preamp would work? Really didn't think about giving it more
audio level. Now I am speaking of the TX audio, not RX. So it is
really what the RC210 is offering...not what the ADI is offering. 
Eric...you still think it needs an opamp?? 
Thanks for the reply,
Robert
KD4YDC

--- In Repeater-Builder@ 
yahoogroups.com
 , "Eric Lemmon" <[EMAIL PROTECTED]>
wrote:
>
> Robert,
> 
> I agree- and the audio level needed by the RC210 is probably much
greater
> than what the radio has to offer. An opamp should work for you.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@ 
yahoogroups.com
 
> [mailto:Repeater-Builder@ 
yahoogroups.com
 ] On Behalf Of georgiaskywarn
> Sent: Sunday, April 27, 2008 10:29 AM
> To: Repeater-Builder@ 
yahoogroups.com
 
> Subject: [Repeater-Builder] ADI 247 for a link radio
> 
> Started a project at the end of LAST summer and never got finished. 
> Using a ADI247 as a 220mhz link radio. Blew something up in it (in
> looking for cos), sent it off, got fixed, now just getting back to the
> project. *I Thought* I had decent tx audio out of it into the RC210
> controller hooked to it. However now I barely get a whisper out of my
> tx audio. I can hook a mic to it...no problem with the audio, works
> fine. Almost sounds like an impedance mismatch.
> 
> Ideas?
> Thanks,
> Robert
> KD4YDC



 

Re: RE: [Repeater-Builder] Re: ADI 247 for a link radio

[Ron Wright]

Paul,

The National LM386 is powered with 4 min to 12 V max.  The LM386-4 accepts 5 to 
18 V max.  -1 & -3 don't give a spec so would not exceed 12V.

Nice little chip.  Gain 26 db typ, input resistance 50k, drive 8 Ohms.  Audio 
in and speaker audio out.

73, ron, n9ee/r



>From: Paul Plack <[EMAIL PROTECTED]>
>Date: 2008/04/27 Sun PM 06:15:30 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder] Re: ADI 247 for a link radio

>
>I don't know if Radio Shack still even sells them, but over the years I've run 
>into a store and bought an LM 386 audio op-amp and a pre-etched prototyping 
>board to throw together an audio "buffer" for applications such as this. The 
>chip draws just 4 ma at idle, is optimized for audio use with low parts count 
>(just add two capacitors,) works with high-Z inputs and 8-ohm outputs, and can 
>provide all the gain you need if configred properly. When used to drive a 
>speaker, the output is coupled through a large electrolytic cap. If you're 
>driving a 600-ohm load, you can reduce this to .5 uF or less. Be careful of 
>"sample circuits" published using this chip. I've seen lots of applications in 
>which the amp was powered off a "12 volt" rail that could actually be 14 
>volts; the chip is specified, I believe, for an absolute max of 12 VDC. If you 
>have a regulated DC stage at 8, 9 or 10 volts, that's perfect. 73,Paul, AE4KR
>From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of 
>Eric Lemmon
>Sent: Sunday, April 27, 2008 5:02 PM
>To:Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder] Re: ADI 247 for a link radio
>
>
>Robert,
>
>Impedance matching is usually a problem when a low-impedance load is
>connected to a high-impedance source, which sounds like what you describe.
>When you use an impedance matching transformer, the audio level will be
>reduced as well as the impedance, and you may not have enough audio. I am
>thinking along the lines of an emitter follower amplifier, which transforms
>a high input impedance to a low output impedance, but implemented with an
>operational amplifier (opamp).
>
>73, Eric Lemmon WB6FLY
>
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn
>Sent: Sunday, April 27, 2008 3:14 PM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Re: ADI 247 for a link radio
>
>Eric,
>I was actually thinking of some 600 to 1 transformer. Your thinking a
>opamp / preamp would work? Really didn't think about giving it more
>audio level. Now I am speaking of the TX audio, not RX. So it is
>really what the RC210 is offering...not what the ADI is offering. 
>Eric...you still think it needs an opamp?? 
>Thanks for the reply,
>Robert
>KD4YDC
>
>--- In Repeater-Builder@yahoogroups.com
> , "Eric Lemmon" <[EMAIL PROTECTED]>
>wrote:
>>
>> Robert,
>> 
>> I agree- and the audio level needed by the RC210 is probably much
>greater
>> than what the radio has to offer. An opamp should work for you.
>> 
>> 73, Eric Lemmon WB6FLY
>> 
>> 
>> -Original Message-
>> From: Repeater-Builder@yahoogroups.com
> 
>> [mailto:Repeater-Builder@yahoogroups.com
> ] On Behalf Of georgiaskywarn
>> Sent: Sunday, April 27, 2008 10:29 AM
>> To: Repeater-Builder@yahoogroups.com
> 
>> Subject: [Repeater-Builder] ADI 247 for a link radio
>> 
>> Started a project at the end of LAST summer and never got finished. 
>> Using a ADI247 as a 220mhz link radio. Blew something up in it (in
>> looking for cos), sent it off, got fixed, now just getting back to the
>> project. *I Thought* I had decent tx audio out of it into the RC210
>> controller hooked to it. However now I barely get a whisper out of my
>> tx audio. I can hook a mic to it...no problem with the audio, works
>> fine. Almost sounds like an impedance mismatch.
>> 
>> Ideas?
>> Thanks,
>> Robert
>> KD4YDC
>
>   
> 


Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.

Re: [Repeater-Builder] More on Copper theft

[Nate Duehr]

On Apr 22, 2008, at 12:56 PM, Jim Brown wrote:

> Mine was on the air - but not active at the time the ax was applied  
> to the hard line.  You are my coordinator, but I never did let you  
> know it was down - sorry.  But back up now, with a new connector and  
> jumper.
>
> 73 - Jim  W5ZIT  (N5SN)  443.9

Another argument for never putting a system on-air without an  
isolator?  ;-)

--
Nate Duehr, WY0X
[EMAIL PROTECTED]

Re: [Repeater-Builder] Re: Bad adapter

[Nate Duehr]

On Apr 25, 2008, at 11:35 PM, Wayne wrote:

>  Did some searching, and it looks like splices would run maybe twice  
> or
> more the cost of one male and one female.

Yup.  This probably falls into the category of "you get what you pay  
for" when compared to regular connectors.

>  As it is, I have 4 male N connectors for the 7/8" and one female.

Sell them, take the proceeds plus $100 and you have enough for the  
splice connector?  :-)

--
Nate Duehr, WY0X
[EMAIL PROTECTED]

[Repeater-Builder] Re: ADI 247 for a link radio

[georgiaskywarn]

Ok. Put the little op-amp together via the Repeater Builder website. 
http://www.repeater-builder.com/rbtip/audioamp.html
I did the one with the 15k resistor and .0047uf cap.  Couldn't tell
you what pot I used. Grabbed one and threw it on.  Going to look thru
my junk later this week and get a 10 or 50k and try it.  Because the
audio is still real low and REAL distorted.

However...with what Ron said...made me think about what another friend
of mine said.  Isn't the ADI looking for something like 600ohms? (like
a hand mic would be)  Much different than an 8 ohm speaker.

This same setup works with a TM-G707 without any matching...why
shouldn't it work with the ADI?
Robert

--- In Repeater-Builder@yahoogroups.com, "georgiaskywarn" <[EMAIL PROTECTED]>
wrote:
>
> Started a project at the end of LAST summer and never got finished. 
> Using a ADI247 as a 220mhz link radio. Blew something up in it (in
> looking for cos), sent it off, got fixed, now just getting back to the
> project.  *I Thought* I had decent tx audio out of it into the RC210
> controller hooked to it.  However now I barely get a whisper out of my
> tx audio.  I can hook a mic to it...no problem with the audio, works
> fine.  Almost sounds like an impedance mismatch.
> 
> Ideas?
> Thanks,
> Robert
> KD4YDC
>

[Repeater-Builder] Re: Bad adapter

[ve7fet]

Yeah, EIA or F flanges are an option, but a cheaper alternative would
be DIN connectors.

They are very common (low price point) as they are very common in the
Cell/PCS world these days. Probably about the same price as "N"
connectors.

The return loss through a DIN connector splice is comparable to a L45Z
(Z-splice), and MUCH easier to put together (Z-splices are a pain).


Lee

--- In Repeater-Builder@yahoogroups.com, "Ralph Messer" <[EMAIL PROTECTED]>
wrote:
>
> Wayne
> 
> If you use the "N" male female splice you might want to look at how
much flexing the cable will get.
> 
> If this cable is "7/8" inch then the flex on the joint can be
catastrophic, especially if it is somewhere on a tower.
> 
> I would suggest a pair of EIA flanges to make a good mechanically
strong splice. 
> Andrew part numbers are L45R
> 
> Ralph

Re: [Repeater-Builder] Re: Bad adapter

[Wayne]

  Must be that because splices were/are very seldom used, the prices are  
astronomical.
  I will wait, for now, till I see what the future will bring me.
  By splicing only where the cable can be well supported on both sides of  
the splice, I would anticipate no problems using what I have.
  And at least two of the connectors I have will be used with the heliax,  
so can't sell em all...

  Wayne WA2YNE




On Sun, 27 Apr 2008 21:17:39 -0500, Nate Duehr <[EMAIL PROTECTED]> wrote:

>
> On Apr 25, 2008, at 11:35 PM, Wayne wrote:
>
>>  Did some searching, and it looks like splices would run maybe twice
>> or
>> more the cost of one male and one female.
>
> Yup.  This probably falls into the category of "you get what you pay
> for" when compared to regular connectors.
>
>>  As it is, I have 4 male N connectors for the 7/8" and one female.
>
> Sell them, take the proceeds plus $100 and you have enough for the
> splice connector?  :-)
>
> --
> Nate Duehr, WY0X
> [EMAIL PROTECTED]
>
>
>



-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/





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