RE: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Jeff DePolo]

> When you say low split, are you talking about the Motorola 
> TRE1201/TRE8031 406-420 Mhz receivers? 

I don't have a manual in front of me, but yes, 406-420 receivers, they'll
work fine well into the mid 430's without mods.

> What Canadian sources might have these? 

Well, Spantek comes to mind as a dealer.  CW Wolfe used to get a lot of
stuff out of Canada, but I haven't talked to Bud in quite a few years, not
sure if he's still in business.  This list is probably the best resource.
eBay as an alternative.  If you get desperate I still have a few dozen
low-split Micors in the warehouse, but really don't have the time (or
patience) to deal with packing and shipping radios for what few dollars I'd
get out of them (i.e. value of my time > $value of radio).  But if you just
wanted a receiver, you can consider me a last resort if you strike out
everywhere else...

--- Jeff WN3A


> 
> --- In Repeater-Builder@yahoogroups.com 
>  , "Jeff DePolo" 
>  wrote:
> >
> > > What is a good radio for building a one way 420 link? The 
> > > link will be for a remote receiver and will not need to be 
> > > duplex... RX at the voter and TX at the remote receiver. The 
> > > link RX has to live on a noisy hill. Thanks for your advice. 
> > 
> > My preferences, in no particular order, would be 
> Micor/SpectraTAC (low
> > split), Mastr II ("77" split), and Delta-S (low-split). 
> MVP/Exec II (again,
> > "77" split) would be fine too. All have excellent front 
> ends. They can be
> > found if you look a bit, especially check Canadian sources; 
> they're not as
> > easy to find stateside as 450-470 radios, but they're not 
> unobtainium
> > either. 
> > 
> > --- Jeff WN3A
> >
> 
> 
> 
> 
> 

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Mike Morris]

Look at W6KGBs article on moving 450-470 Mastr IIs
to 420-450.  It's on the GE Mastr II page at repeater-builder.

You could use a Mastr II UHF mobile with the receiver,
exciter and IPA converted to 420, then use the receiver
in an aux receiver chassis at the voter site.
You wouldn't need to convert the PA, the IPA (driver)
and a beam would be enough for a point-to-point link.

Bob Meister WA1MIK did an article on converting the
multiplier chains so that the UHF Micor receivers could
hear down as low as 435 MHz (where the front ends
run out of tuning range).

Mike WA6ILQ


At 05:10 PM 07/27/10, you wrote:
>Thanks Jeff, I'll keep looking around for those low split UHF Micor 
>receivers. What about the transmit side?
>
>Maybe I should look for a unified chassis low split UHF repeater. 
>Swap out the UHF receiver for a VHF high band receiver and use that 
>for my remote receiver site. Then use the low split UHF receiver on 
>the other end of the link.
>
>That make sense?
>
>--- In Repeater-Builder@yahoogroups.com, "Jeff DePolo"  wrote:
> >
> > > When you say low split, are you talking about the Motorola
> > > TRE1201/TRE8031 406-420 Mhz receivers?
> >
> > I don't have a manual in front of me, but yes, 406-420 receivers, they'll
> > work fine well into the mid 430's without mods.
> >
> > > What Canadian sources might have these?
> >
> > Well, Spantek comes to mind as a dealer.  CW Wolfe used to get a lot of
> > stuff out of Canada, but I haven't talked to Bud in quite a few years, not
> > sure if he's still in business.  This list is probably the best resource.
> > eBay as an alternative.  If you get desperate I still have a few dozen
> > low-split Micors in the warehouse, but really don't have the time (or
> > patience) to deal with packing and shipping radios for what few dollars I'd
> > get out of them (i.e. value of my time > $value of radio).  But if you just
> > wanted a receiver, you can consider me a last resort if you strike out
> > everywhere else...
> >
> >   --- Jeff WN3A
> >
> >
> > >
> > > --- In Repeater-Builder@yahoogroups.com
> > >  , "Jeff DePolo"
> > >  wrote:
> > > >
> > > > > What is a good radio for building a one way 420 link? The
> > > > > link will be for a remote receiver and will not need to be
> > > > > duplex... RX at the voter and TX at the remote receiver. The
> > > > > link RX has to live on a noisy hill. Thanks for your advice.
> > > >
> > > > My preferences, in no particular order, would be
> > > Micor/SpectraTAC (low
> > > > split), Mastr II ("77" split), and Delta-S (low-split).
> > > MVP/Exec II (again,
> > > > "77" split) would be fine too. All have excellent front
> > > ends. They can be
> > > > found if you look a bit, especially check Canadian sources;
> > > they're not as
> > > > easy to find stateside as 450-470 radios, but they're not
> > > unobtainium
> > > > either.
> > > >
> > > > --- Jeff WN3A
> > > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[James Adkins]

I am using the Motorola CDM series of radios for 420-425 MHz links from
voting sites.  They make a low-split UHF split that covers 403-470 MHz out
of the box, no mods needed.  On the transmit sites, you will want to use a
fan for cooling.  We mount the RX radio and a UHF TX radio on a 1U rack
shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and
purchase a nice Dayton 24vdc fan that is actually a ball bearing fan that
you can count on for years of use, and let it go.  Have not had any problems
to date with these rigs over a 4 year span.

 at W6KGBs article on moving 450-470 Mastr IIs

> to 420-450. It's on the GE Mastr II page at repeater-builder.
>
> You could use a Mastr II UHF mobile with the receiver,
> exciter and IPA converted to 420, then use the receiver
> in an aux receiver chassis at the voter site.
> You wouldn't need to convert the PA, the IPA (driver)
> and a beam would be enough for a point-to-point link.
>
> Bob Meister WA1MIK did an article on converting the
> multiplier chains so that the UHF Micor receivers could
> hear down as low as 435 MHz (where the front ends
> run out of tuning range).
>
> Mike WA6ILQ
>
> At 05:10 PM 07/27/10, you wrote:
> >Thanks Jeff, I'll keep looking around for those low split UHF Micor
> >receivers. What about the transmit side?
> >
> >Maybe I should look for a unified chassis low split UHF repeater.
> >Swap out the UHF receiver for a VHF high band receiver and use that
> >for my remote receiver site. Then use the low split UHF receiver on
> >the other end of the link.
> >
> >That make sense?
> >
> >--- In Repeater-Builder@yahoogroups.com,
> "Jeff DePolo"  wrote:
> > >
> > > > When you say low split, are you talking about the Motorola
> > > > TRE1201/TRE8031 406-420 Mhz receivers?
> > >
> > > I don't have a manual in front of me, but yes, 406-420 receivers,
> they'll
> > > work fine well into the mid 430's without mods.
> > >
> > > > What Canadian sources might have these?
> > >
> > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a lot of
> > > stuff out of Canada, but I haven't talked to Bud in quite a few years,
> not
> > > sure if he's still in business. This list is probably the best
> resource.
> > > eBay as an alternative. If you get desperate I still have a few dozen
> > > low-split Micors in the warehouse, but really don't have the time (or
> > > patience) to deal with packing and shipping radios for what few dollars
> I'd
> > > get out of them (i.e. value of my time > $value of radio). But if you
> just
> > > wanted a receiver, you can consider me a last resort if you strike out
> > > everywhere else...
> > >
> > > --- Jeff WN3A
> > >
> > >
> > > >
> > > > --- In 
> > > > Repeater-Builder@yahoogroups.com
> > > > 
> , "Jeff DePolo"
> > > >  wrote:
> > > > >
> > > > > > What is a good radio for building a one way 420 link? The
> > > > > > link will be for a remote receiver and will not need to be
> > > > > > duplex... RX at the voter and TX at the remote receiver. The
> > > > > > link RX has to live on a noisy hill. Thanks for your advice.
> > > > >
> > > > > My preferences, in no particular order, would be
> > > > Micor/SpectraTAC (low
> > > > > split), Mastr II ("77" split), and Delta-S (low-split).
> > > > MVP/Exec II (again,
> > > > > "77" split) would be fine too. All have excellent front
> > > > ends. They can be
> > > > > found if you look a bit, especially check Canadian sources;
> > > > they're not as
> > > > > easy to find stateside as 450-470 radios, but they're not
> > > > unobtainium
> > > > > either.
> > > > >
> > > > > --- Jeff WN3A
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
>  
>



-- 
James Adkins, KB0NHX
Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN)
www.nixahams.net

Southern Missouri Assistant Frequency Coordinator - Missouri Repeater
Council
www.missourirepeater.org

The Nixa Amateur Radio Club - "There is no charge for awesomeness!" (Well,
only $1.00 per month)

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Oz-in-DFW]

On 7/29/2010 2:36 PM, Tim - WD6AWP wrote:
>  
>
> I emailed Spantek. They told me they don't do Micor's any more. CW
> Wofle appears to not be in business as I can't find them on the web.
> Any other ideas where I might find some UHF low split Micor parts?
>
If it's got to be Micor it's hamfest fodder.  Too heavy for eBay for the
most part.   I'd ask over on Batlabs, check with MDM in Chicago, and
maybe Andy Brinkley.  The stuff is still out there, but it's boat anchor
class now.

I'm a Motorola fan, but I prefer MastrII/MVP for this stuff.  Even the
450 stuff tunes down to 420 without much trouble.

If it has to have batwings on the label, I have some low power (25 or 30
W?)  403-430 Mitreks that I ought to find a new home for.

-- 
mailto:o...@ozindfw.net
Oz
POB 93167
Southlake, TX 76092 (Near DFW Airport)

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Glenn (Butch) Kanvick]

Hello Tim.

I just looked in my storage site and I found a Micor Base/Repeater which is
on the band split of 402-430 MHz. I do not have channel elements for it.
I know it was working when it came out of service a few years ago, and the
PA can be used as a digital station, as it takes the four pin channel
elements. It is the complete base repeater which is designed for continious
duty as it has the large pa heatsinks.

Let me know if you would like pictures of it.
I have $200.00 into it and it weighs alot so I am sure shipping via ground
would be around $50.00.

If you need the cabinet and power supply it would be $400.00 plus actual
shipping.


Butch, KE7FEL/r
On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP  wrote:

>
>
> Those CDM radios are a bit pricy at $550 each. But I appreciate the
> suggestion. And you've given me some ideas.
>
> I still like the idea of building an out of band repeater for the remote
> receive site from a Micor chassis. I would need a 406-420 exciter, bandpass
> filter and trippler. If anybody on the list has those or can help me find
> them I'd really appreciate it.
>
> --- In Repeater-Builder@yahoogroups.com,
> James Adkins  wrote:
> >
> > I am using the Motorola CDM series of radios for 420-425 MHz links from
> > voting sites. They make a low-split UHF split that covers 403-470 MHz out
> > of the box, no mods needed. On the transmit sites, you will want to use a
> > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U rack
> > shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and
> > purchase a nice Dayton 24vdc fan that is actually a ball bearing fan that
> > you can count on for years of use, and let it go. Have not had any
> problems
> > to date with these rigs over a 4 year span.
> >
> > at W6KGBs article on moving 450-470 Mastr IIs
> >
> > > to 420-450. It's on the GE Mastr II page at repeater-builder.
> > >
> > > You could use a Mastr II UHF mobile with the receiver,
> > > exciter and IPA converted to 420, then use the receiver
> > > in an aux receiver chassis at the voter site.
> > > You wouldn't need to convert the PA, the IPA (driver)
> > > and a beam would be enough for a point-to-point link.
> > >
> > > Bob Meister WA1MIK did an article on converting the
> > > multiplier chains so that the UHF Micor receivers could
> > > hear down as low as 435 MHz (where the front ends
> > > run out of tuning range).
> > >
> > > Mike WA6ILQ
> > >
> > > At 05:10 PM 07/27/10, you wrote:
> > > >Thanks Jeff, I'll keep looking around for those low split UHF Micor
> > > >receivers. What about the transmit side?
> > > >
> > > >Maybe I should look for a unified chassis low split UHF repeater.
> > > >Swap out the UHF receiver for a VHF high band receiver and use that
> > > >for my remote receiver site. Then use the low split UHF receiver on
> > > >the other end of the link.
> > > >
> > > >That make sense?
> > > >
> > > >--- In 
> > > >Repeater-Builder@yahoogroups.com
> ,
>
> > > "Jeff DePolo"  wrote:
> > > > >
> > > > > > When you say low split, are you talking about the Motorola
> > > > > > TRE1201/TRE8031 406-420 Mhz receivers?
> > > > >
> > > > > I don't have a manual in front of me, but yes, 406-420 receivers,
> > > they'll
> > > > > work fine well into the mid 430's without mods.
> > > > >
> > > > > > What Canadian sources might have these?
> > > > >
> > > > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a lot
> of
> > > > > stuff out of Canada, but I haven't talked to Bud in quite a few
> years,
> > > not
> > > > > sure if he's still in business. This list is probably the best
> > > resource.
> > > > > eBay as an alternative. If you get desperate I still have a few
> dozen
> > > > > low-split Micors in the warehouse, but really don't have the time
> (or
> > > > > patience) to deal with packing and shipping radios for what few
> dollars
> > > I'd
> > > > > get out of them (i.e. value of my time > $value of radio). But if
> you
> > > just
> > > > > wanted a receiver, you can consider me a last resort if you strike
> out
> > > > > everywhere else...
> > > > >
> > > > > --- Jeff WN3A
> > > > >
> > > > >
> > > > > >
> > > > > > --- In 
> > > > > > Repeater-Builder@yahoogroups.com
> 
> > > > > >  >
>
> > > , "Jeff DePolo"
> > > > > >  wrote:
> > > > > > >
> > > > > > > > What is a good radio for building a one way 420 link? The
> > > > > > > > link will be for a remote receiver and will not need to be
> > > > > > > > duplex... RX at the voter and TX at the remote receiver. The
> > > > > > > > link RX has to live on a noisy hill. Thanks for your advice.
> > > > > > >
> > > > > > > My preferences, in no particular order, would be
> > > > > > Micor/SpectraTAC (low
> > > > > > > split), Mastr II ("77" split), and Delta-S (low-split).
> > > > > > MVP/Exec II (again,
> > > > > > > "77" split) would be fine too. All have excellent front
> > > > > > ends. They can be
> > > > > > > found if you look a bit, especia

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[James Adkins]

I disagree on the price of the CDM's.  You can get the CDM-750 (4-channel)
for as low as $75 to $125 if you watch for them on e-bay.  The CDM-1250 and
CDM-1550 are more expensive used, but still you should be able to get them
for $250 or less if you just have to have the 128 channels and alpha
display.

On our setup, I program the RX CDM for PL on receive, but leave it in
monitor mode.  I then feed the PL detect from the RX radio to the PL encode
of the TX CDM.  When it gets back to the site, if the radio receives a PL,
then it sends the logic out the PL detect pin.  If it doesn't, then no logic
is sent.  This way you can turn the PL tone at all your remote sites locally
with your controller.

On Thu, Jul 29, 2010 at 3:35 PM, Glenn (Butch) Kanvick wrote:

>
>
> Hello Tim.
>
> I just looked in my storage site and I found a Micor Base/Repeater which is
> on the band split of 402-430 MHz. I do not have channel elements for it.
> I know it was working when it came out of service a few years ago, and the
> PA can be used as a digital station, as it takes the four pin channel
> elements. It is the complete base repeater which is designed for continious
> duty as it has the large pa heatsinks.
>
> Let me know if you would like pictures of it.
> I have $200.00 into it and it weighs alot so I am sure shipping via ground
> would be around $50.00.
>
> If you need the cabinet and power supply it would be $400.00 plus actual
> shipping.
>
>
> Butch, KE7FEL/r
> On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP  wrote:
>
>>
>>
>> Those CDM radios are a bit pricy at $550 each. But I appreciate the
>> suggestion. And you've given me some ideas.
>>
>> I still like the idea of building an out of band repeater for the remote
>> receive site from a Micor chassis. I would need a 406-420 exciter, bandpass
>> filter and trippler. If anybody on the list has those or can help me find
>> them I'd really appreciate it.
>>
>> --- In Repeater-Builder@yahoogroups.com,
>> James Adkins  wrote:
>> >
>> > I am using the Motorola CDM series of radios for 420-425 MHz links from
>> > voting sites. They make a low-split UHF split that covers 403-470 MHz
>> out
>> > of the box, no mods needed. On the transmit sites, you will want to use
>> a
>> > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U rack
>> > shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and
>> > purchase a nice Dayton 24vdc fan that is actually a ball bearing fan
>> that
>> > you can count on for years of use, and let it go. Have not had any
>> problems
>> > to date with these rigs over a 4 year span.
>> >
>> > at W6KGBs article on moving 450-470 Mastr IIs
>> >
>> > > to 420-450. It's on the GE Mastr II page at repeater-builder.
>> > >
>> > > You could use a Mastr II UHF mobile with the receiver,
>> > > exciter and IPA converted to 420, then use the receiver
>> > > in an aux receiver chassis at the voter site.
>> > > You wouldn't need to convert the PA, the IPA (driver)
>> > > and a beam would be enough for a point-to-point link.
>> > >
>> > > Bob Meister WA1MIK did an article on converting the
>> > > multiplier chains so that the UHF Micor receivers could
>> > > hear down as low as 435 MHz (where the front ends
>> > > run out of tuning range).
>> > >
>> > > Mike WA6ILQ
>> > >
>> > > At 05:10 PM 07/27/10, you wrote:
>> > > >Thanks Jeff, I'll keep looking around for those low split UHF Micor
>> > > >receivers. What about the transmit side?
>> > > >
>> > > >Maybe I should look for a unified chassis low split UHF repeater.
>> > > >Swap out the UHF receiver for a VHF high band receiver and use that
>> > > >for my remote receiver site. Then use the low split UHF receiver on
>> > > >the other end of the link.
>> > > >
>> > > >That make sense?
>> > > >
>> > > >--- In 
>> > > >Repeater-Builder@yahoogroups.com
>> ,
>>
>> > > "Jeff DePolo"  wrote:
>> > > > >
>> > > > > > When you say low split, are you talking about the Motorola
>> > > > > > TRE1201/TRE8031 406-420 Mhz receivers?
>> > > > >
>> > > > > I don't have a manual in front of me, but yes, 406-420 receivers,
>> > > they'll
>> > > > > work fine well into the mid 430's without mods.
>> > > > >
>> > > > > > What Canadian sources might have these?
>> > > > >
>> > > > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a
>> lot of
>> > > > > stuff out of Canada, but I haven't talked to Bud in quite a few
>> years,
>> > > not
>> > > > > sure if he's still in business. This list is probably the best
>> > > resource.
>> > > > > eBay as an alternative. If you get desperate I still have a few
>> dozen
>> > > > > low-split Micors in the warehouse, but really don't have the time
>> (or
>> > > > > patience) to deal with packing and shipping radios for what few
>> dollars
>> > > I'd
>> > > > > get out of them (i.e. value of my time > $value of radio). But if
>> you
>> > > just
>> > > > > wanted a receiver, you can consider me a last resort if you strike
>> out
>> > > > > everywhere else...
>> > > > >
>> 

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Tim Sawyer]

What's it take to program those radios?
--
Tim
:wq

On Jul 29, 2010, at 8:45 PM, James Adkins wrote:

> I disagree on the price of the CDM's.  You can get the CDM-750 (4-channel) 
> for as low as $75 to $125 if you watch for them on e-bay.  The CDM-1250 and 
> CDM-1550 are more expensive used, but still you should be able to get them 
> for $250 or less if you just have to have the 128 channels and alpha display.
> 
> 
> On our setup, I program the RX CDM for PL on receive, but leave it in monitor 
> mode.  I then feed the PL detect from the RX radio to the PL encode of the TX 
> CDM.  When it gets back to the site, if the radio receives a PL, then it 
> sends the logic out the PL detect pin.  If it doesn't, then no logic is sent. 
>  This way you can turn the PL tone at all your remote sites locally with your 
> controller.
> 
> On Thu, Jul 29, 2010 at 3:35 PM, Glenn (Butch) Kanvick  
> wrote:
>  
> 
> Hello Tim.
>  
> I just looked in my storage site and I found a Micor Base/Repeater which is 
> on the band split of 402-430 MHz. I do not have channel elements for it.
> I know it was working when it came out of service a few years ago, and the PA 
> can be used as a digital station, as it takes the four pin channel elements. 
> It is the complete base repeater which is designed for continious duty as it 
> has the large pa heatsinks.
>  
> Let me know if you would like pictures of it.
> I have $200.00 into it and it weighs alot so I am sure shipping via ground 
> would be around $50.00.
>  
> If you need the cabinet and power supply it would be $400.00 plus actual 
> shipping.
>  
>  
> Butch, KE7FEL/r
> On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP  wrote:
>  
> Those CDM radios are a bit pricy at $550 each. But I appreciate the 
> suggestion. And you've given me some ideas. 
> 
> I still like the idea of building an out of band repeater for the remote 
> receive site from a Micor chassis. I would need a 406-420 exciter, bandpass 
> filter and trippler. If anybody on the list has those or can help me find 
> them I'd really appreciate it. 
> 
> --- In Repeater-Builder@yahoogroups.com, James Adkins  
> wrote:
> >
> > I am using the Motorola CDM series of radios for 420-425 MHz links from
> > voting sites. They make a low-split UHF split that covers 403-470 MHz out
> > of the box, no mods needed. On the transmit sites, you will want to use a
> > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U rack
> > shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and
> > purchase a nice Dayton 24vdc fan that is actually a ball bearing fan that
> > you can count on for years of use, and let it go. Have not had any problems
> > to date with these rigs over a 4 year span.
> > 
> > at W6KGBs article on moving 450-470 Mastr IIs
> > 
> > > to 420-450. It's on the GE Mastr II page at repeater-builder.
> > >
> > > You could use a Mastr II UHF mobile with the receiver,
> > > exciter and IPA converted to 420, then use the receiver
> > > in an aux receiver chassis at the voter site.
> > > You wouldn't need to convert the PA, the IPA (driver)
> > > and a beam would be enough for a point-to-point link.
> > >
> > > Bob Meister WA1MIK did an article on converting the
> > > multiplier chains so that the UHF Micor receivers could
> > > hear down as low as 435 MHz (where the front ends
> > > run out of tuning range).
> > >
> > > Mike WA6ILQ
> > >
> > > At 05:10 PM 07/27/10, you wrote:
> > > >Thanks Jeff, I'll keep looking around for those low split UHF Micor
> > > >receivers. What about the transmit side?
> > > >
> > > >Maybe I should look for a unified chassis low split UHF repeater.
> > > >Swap out the UHF receiver for a VHF high band receiver and use that
> > > >for my remote receiver site. Then use the low split UHF receiver on
> > > >the other end of the link.
> > > >
> > > >That make sense?
> > > >
> > > >--- In 
> > > >Repeater-Builder@yahoogroups.com,
> 
> > > "Jeff DePolo"  wrote:
> > > > >
> > > > > > When you say low split, are you talking about the Motorola
> > > > > > TRE1201/TRE8031 406-420 Mhz receivers?
> > > > >
> > > > > I don't have a manual in front of me, but yes, 406-420 receivers,
> > > they'll
> > > > > work fine well into the mid 430's without mods.
> > > > >
> > > > > > What Canadian sources might have these?
> > > > >
> > > > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a lot of
> > > > > stuff out of Canada, but I haven't talked to Bud in quite a few years,
> > > not
> > > > > sure if he's still in business. This list is probably the best
> > > resource.
> > > > > eBay as an alternative. If you get desperate I still have a few dozen
> > > > > low-split Micors in the warehouse, but really don't have the time (or
> > > > > patience) to deal with packing and shipping radios for what few 
> > > > > dollars
> > > I'd
> > > > > get out of them (i.e. value of my time > $value of radio). But if you
> > > just
> > > > > wanted a receiver, you can consider me a last 

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[James Adkins]

Any windows PC with a serial port, an aftermarket or "real" Motorola cable
and software.

On Thu, Jul 29, 2010 at 11:05 PM, Tim Sawyer  wrote:

>
>
> What's it take to program those radios?
>  --
> Tim
> :wq
>
>  On Jul 29, 2010, at 8:45 PM, James Adkins wrote:
>
>
>
> I disagree on the price of the CDM's.  You can get the CDM-750 (4-channel)
> for as low as $75 to $125 if you watch for them on e-bay.  The CDM-1250 and
> CDM-1550 are more expensive used, but still you should be able to get them
> for $250 or less if you just have to have the 128 channels and alpha
> display.
>
> On our setup, I program the RX CDM for PL on receive, but leave it in
> monitor mode.  I then feed the PL detect from the RX radio to the PL encode
> of the TX CDM.  When it gets back to the site, if the radio receives a PL,
> then it sends the logic out the PL detect pin.  If it doesn't, then no logic
> is sent.  This way you can turn the PL tone at all your remote sites locally
> with your controller.
>
> On Thu, Jul 29, 2010 at 3:35 PM, Glenn (Butch) Kanvick 
> wrote:
>
>>
>>
>> Hello Tim.
>>
>> I just looked in my storage site and I found a Micor Base/Repeater which
>> is on the band split of 402-430 MHz. I do not have channel elements for it.
>> I know it was working when it came out of service a few years ago, and the
>> PA can be used as a digital station, as it takes the four pin channel
>> elements. It is the complete base repeater which is designed for continious
>> duty as it has the large pa heatsinks.
>>
>> Let me know if you would like pictures of it.
>> I have $200.00 into it and it weighs alot so I am sure shipping via ground
>> would be around $50.00.
>>
>> If you need the cabinet and power supply it would be $400.00 plus actual
>> shipping.
>>
>>
>> Butch, KE7FEL/r
>>   On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP wrote:
>>
>>>
>>>
>>> Those CDM radios are a bit pricy at $550 each. But I appreciate the
>>> suggestion. And you've given me some ideas.
>>>
>>> I still like the idea of building an out of band repeater for the remote
>>> receive site from a Micor chassis. I would need a 406-420 exciter, bandpass
>>> filter and trippler. If anybody on the list has those or can help me find
>>> them I'd really appreciate it.
>>>
>>> --- In Repeater-Builder@yahoogroups.com,
>>> James Adkins  wrote:
>>> >
>>> > I am using the Motorola CDM series of radios for 420-425 MHz links from
>>> > voting sites. They make a low-split UHF split that covers 403-470 MHz
>>> out
>>> > of the box, no mods needed. On the transmit sites, you will want to use
>>> a
>>> > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U rack
>>> > shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and
>>> > purchase a nice Dayton 24vdc fan that is actually a ball bearing fan
>>> that
>>> > you can count on for years of use, and let it go. Have not had any
>>> problems
>>> > to date with these rigs over a 4 year span.
>>> >
>>> > at W6KGBs article on moving 450-470 Mastr IIs
>>> >
>>> > > to 420-450. It's on the GE Mastr II page at repeater-builder.
>>> > >
>>> > > You could use a Mastr II UHF mobile with the receiver,
>>> > > exciter and IPA converted to 420, then use the receiver
>>> > > in an aux receiver chassis at the voter site.
>>> > > You wouldn't need to convert the PA, the IPA (driver)
>>> > > and a beam would be enough for a point-to-point link.
>>> > >
>>> > > Bob Meister WA1MIK did an article on converting the
>>> > > multiplier chains so that the UHF Micor receivers could
>>> > > hear down as low as 435 MHz (where the front ends
>>> > > run out of tuning range).
>>> > >
>>> > > Mike WA6ILQ
>>> > >
>>> > > At 05:10 PM 07/27/10, you wrote:
>>> > > >Thanks Jeff, I'll keep looking around for those low split UHF Micor
>>> > > >receivers. What about the transmit side?
>>> > > >
>>> > > >Maybe I should look for a unified chassis low split UHF repeater.
>>> > > >Swap out the UHF receiver for a VHF high band receiver and use that
>>> > > >for my remote receiver site. Then use the low split UHF receiver on
>>> > > >the other end of the link.
>>> > > >
>>> > > >That make sense?
>>> > > >
>>> > > >--- In 
>>> > > >Repeater-Builder@yahoogroups.com
>>> ,
>>>
>>> > > "Jeff DePolo"  wrote:
>>> > > > >
>>> > > > > > When you say low split, are you talking about the Motorola
>>> > > > > > TRE1201/TRE8031 406-420 Mhz receivers?
>>> > > > >
>>> > > > > I don't have a manual in front of me, but yes, 406-420 receivers,
>>> > > they'll
>>> > > > > work fine well into the mid 430's without mods.
>>> > > > >
>>> > > > > > What Canadian sources might have these?
>>> > > > >
>>> > > > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a
>>> lot of
>>> > > > > stuff out of Canada, but I haven't talked to Bud in quite a few
>>> years,
>>> > > not
>>> > > > > sure if he's still in business. This list is probably the best
>>> > > resource.
>>> > > > > eBay as an alternative. If you get desperate I still have a few
>>> dozen
>>> > >

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[MCH]

Not even close.

Joe M.

Tim - WD6AWP wrote:
> Are the CDM's similar to the Radius M1225? 

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Glenn (Butch) Kanvick]

Hello Tim.
This message made it through.

Do you need just the transmitter, receiver and the card cage or do you want
the complete radio with power supply and cabinet?

Do you need pictures of the repeater?

Thanks, Butch, KE7FEL/r

On Fri, Jul 30, 2010 at 5:03 PM, Tim - WD6AWP  wrote:

>
>
> Butch,
>
> I replied to you off list but maybe your spam filter got me. I'm interested
> so please check your email.
>
> --
> Tim
>
> --- In Repeater-Builder@yahoogroups.com,
> "Glenn (Butch) Kanvick"  wrote:
> >
> > Hello Tim.
> >
> > I just looked in my storage site and I found a Micor Base/Repeater which
> is
> > on the band split of 402-430 MHz. I do not have channel elements for it.
> > I know it was working when it came out of service a few years ago, and
> the
> > PA can be used as a digital station, as it takes the four pin channel
> > elements. It is the complete base repeater which is designed for
> continious
> > duty as it has the large pa heatsinks.
> >
> > Let me know if you would like pictures of it.
> > I have $200.00 into it and it weighs alot so I am sure shipping via
> ground
> > would be around $50.00.
> >
> > If you need the cabinet and power supply it would be $400.00 plus actual
> > shipping.
> >
> >
> > Butch, KE7FEL/r
> > On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP  wrote:
> >
> > >
> > >
> > > Those CDM radios are a bit pricy at $550 each. But I appreciate the
> > > suggestion. And you've given me some ideas.
> > >
> > > I still like the idea of building an out of band repeater for the
> remote
> > > receive site from a Micor chassis. I would need a 406-420 exciter,
> bandpass
> > > filter and trippler. If anybody on the list has those or can help me
> find
> > > them I'd really appreciate it.
> > >
> > > --- In 
> > > Repeater-Builder@yahoogroups.com
> ,
> > > James Adkins  wrote:
> > > >
> > > > I am using the Motorola CDM series of radios for 420-425 MHz links
> from
> > > > voting sites. They make a low-split UHF split that covers 403-470 MHz
> out
> > > > of the box, no mods needed. On the transmit sites, you will want to
> use a
> > > > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U
> rack
> > > > shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and
> > > > purchase a nice Dayton 24vdc fan that is actually a ball bearing fan
> that
> > > > you can count on for years of use, and let it go. Have not had any
> > > problems
> > > > to date with these rigs over a 4 year span.
> > > >
> > > > at W6KGBs article on moving 450-470 Mastr IIs
> > > >
> > > > > to 420-450. It's on the GE Mastr II page at repeater-builder.
> > > > >
> > > > > You could use a Mastr II UHF mobile with the receiver,
> > > > > exciter and IPA converted to 420, then use the receiver
> > > > > in an aux receiver chassis at the voter site.
> > > > > You wouldn't need to convert the PA, the IPA (driver)
> > > > > and a beam would be enough for a point-to-point link.
> > > > >
> > > > > Bob Meister WA1MIK did an article on converting the
> > > > > multiplier chains so that the UHF Micor receivers could
> > > > > hear down as low as 435 MHz (where the front ends
> > > > > run out of tuning range).
> > > > >
> > > > > Mike WA6ILQ
> > > > >
> > > > > At 05:10 PM 07/27/10, you wrote:
> > > > > >Thanks Jeff, I'll keep looking around for those low split UHF
> Micor
> > > > > >receivers. What about the transmit side?
> > > > > >
> > > > > >Maybe I should look for a unified chassis low split UHF repeater.
> > > > > >Swap out the UHF receiver for a VHF high band receiver and use
> that
> > > > > >for my remote receiver site. Then use the low split UHF receiver
> on
> > > > > >the other end of the link.
> > > > > >
> > > > > >That make sense?
> > > > > >
> > > > > >--- In 
> > > > > >Repeater-Builder@yahoogroups.com
> 
> > > ,
> > >
> > > > > "Jeff DePolo"  wrote:
> > > > > > >
> > > > > > > > When you say low split, are you talking about the Motorola
> > > > > > > > TRE1201/TRE8031 406-420 Mhz receivers?
> > > > > > >
> > > > > > > I don't have a manual in front of me, but yes, 406-420
> receivers,
> > > > > they'll
> > > > > > > work fine well into the mid 430's without mods.
> > > > > > >
> > > > > > > > What Canadian sources might have these?
> > > > > > >
> > > > > > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a
> lot
> > > of
> > > > > > > stuff out of Canada, but I haven't talked to Bud in quite a few
> > > years,
> > > > > not
> > > > > > > sure if he's still in business. This list is probably the best
> > > > > resource.
> > > > > > > eBay as an alternative. If you get desperate I still have a few
> > > dozen
> > > > > > > low-split Micors in the warehouse, but really don't have the
> time
> > > (or
> > > > > > > patience) to deal with packing and shipping radios for what few
> > > dollars
> > > > > I'd
> > > > > > > get out of them (i.e. value of my time > $value of radio). But
> if
> > > you
> > > > > just
> > > > > > > wanted a receiver, you can consider me a last r

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Glenn (Butch) Kanvick]

Hello Tim.

The entire radio, with the transmitter, receiver, card cage, power supply
and cabinet is  $400.00
If you need just the receiver, transmitter and card cage is $200.00.

Some people do not want to pay the shipping for the power supply or cabinet,
that is why I break it up into a smaller package.
I will goto the storage placeand get pictures foryou.
Thanks,  Butch, KE7FEL/r

On Fri, Jul 30, 2010 at 5:13 PM, Tim - WD6AWP  wrote:

>
>
> I guess you don't care to elaborate.
>
>
> --- In Repeater-Builder@yahoogroups.com,
> MCH  wrote:
> >
> > Not even close.
> >
> > Joe M.
> >
> > Tim - WD6AWP wrote:
> > > Are the CDM's similar to the Radius M1225?
> >
>
>  
>

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[MCH]

It was asked if they were similar. I replied that they are not. I 
figured there were too many things that were different to elaborate further.

They are both made by Motorola in Malaysia. They are both programmed 
using a PC computer (albeit by different SW packages). They share the 
same programming cable, although most Motorola mobiles do. Hence, the 
same microphones. The 16-pin accessory connector can be used in the CDM 
as long as you don't need pins 17-20 - just remember to align it in the 
center of the connector. They take the same power cord. They both use 
the mini UHF RF connector.

That's about all that is the same. So, if you want to know how they are 
different, well, anything other than the above.

Joe M.

Tim - WD6AWP wrote:
> I guess you don't care to elaborate.
> 
> --- In Repeater-Builder@yahoogroups.com, MCH  wrote:
>> Not even close.
>>
>> Joe M.
>>
>> Tim - WD6AWP wrote:
>>> Are the CDM's similar to the Radius M1225?
> 
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Glenn (Butch) Kanvick]

Hello Tim.
Yes, it is the 402-430 Mhz. split radio. I have a coupleoftheMicorsandafew
GEMastr II's.

The TX is on 419.3750  and the RX is on 414.4750

I will get you pictures probably tommorrow afternoon.

Butch, KE7FEL/r



On Fri, Jul 30, 2010 at 6:02 PM, Tim - WD6AWP  wrote:

>
>
>
> I just need the rx, tx and pa. I can use the DC cables too. I don't need
> the ps or cabinet. Pictures would be nice if you can send them. And you're
> sure it's UHF low split 406-420?
>
> --- In Repeater-Builder@yahoogroups.com,
> "Glenn (Butch) Kanvick"  wrote:
> >
> > Hello Tim.
> > This message made it through.
> >
> > Do you need just the transmitter, receiver and the card cage or do you
> want
> > the complete radio with power supply and cabinet?
> >
> > Do you need pictures of the repeater?
> >
> > Thanks, Butch, KE7FEL/r
> >
> > On Fri, Jul 30, 2010 at 5:03 PM, Tim - WD6AWP  wrote:
> >
> > >
> > >
> > > Butch,
> > >
> > > I replied to you off list but maybe your spam filter got me. I'm
> interested
> > > so please check your email.
> > >
> > > --
> > > Tim
> > >
> > > --- In 
> > > Repeater-Builder@yahoogroups.com
> ,
>
> > > "Glenn (Butch) Kanvick"  wrote:
> > > >
> > > > Hello Tim.
> > > >
> > > > I just looked in my storage site and I found a Micor Base/Repeater
> which
> > > is
> > > > on the band split of 402-430 MHz. I do not have channel elements for
> it.
> > > > I know it was working when it came out of service a few years ago,
> and
> > > the
> > > > PA can be used as a digital station, as it takes the four pin channel
> > > > elements. It is the complete base repeater which is designed for
> > > continious
> > > > duty as it has the large pa heatsinks.
> > > >
> > > > Let me know if you would like pictures of it.
> > > > I have $200.00 into it and it weighs alot so I am sure shipping via
> > > ground
> > > > would be around $50.00.
> > > >
> > > > If you need the cabinet and power supply it would be $400.00 plus
> actual
> > > > shipping.
> > > >
> > > >
> > > > Butch, KE7FEL/r
> > > > On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP  wrote:
> > > >
> > > > >
> > > > >
> > > > > Those CDM radios are a bit pricy at $550 each. But I appreciate the
> > > > > suggestion. And you've given me some ideas.
> > > > >
> > > > > I still like the idea of building an out of band repeater for the
> > > remote
> > > > > receive site from a Micor chassis. I would need a 406-420 exciter,
> > > bandpass
> > > > > filter and trippler. If anybody on the list has those or can help
> me
> > > find
> > > > > them I'd really appreciate it.
> > > > >
> > > > > --- In 
> > > > > Repeater-Builder@yahoogroups.com
> 
> > > ,
> > > > > James Adkins  wrote:
> > > > > >
> > > > > > I am using the Motorola CDM series of radios for 420-425 MHz
> links
> > > from
> > > > > > voting sites. They make a low-split UHF split that covers 403-470
> MHz
> > > out
> > > > > > of the box, no mods needed. On the transmit sites, you will want
> to
> > > use a
> > > > > > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U
> > > rack
> > > > > > shelf, use a 4" hole saw and drill a hole under the UHF TX radio,
> and
> > > > > > purchase a nice Dayton 24vdc fan that is actually a ball bearing
> fan
> > > that
> > > > > > you can count on for years of use, and let it go. Have not had
> any
> > > > > problems
> > > > > > to date with these rigs over a 4 year span.
> > > > > >
> > > > > > at W6KGBs article on moving 450-470 Mastr IIs
> > > > > >
> > > > > > > to 420-450. It's on the GE Mastr II page at repeater-builder.
> > > > > > >
> > > > > > > You could use a Mastr II UHF mobile with the receiver,
> > > > > > > exciter and IPA converted to 420, then use the receiver
> > > > > > > in an aux receiver chassis at the voter site.
> > > > > > > You wouldn't need to convert the PA, the IPA (driver)
> > > > > > > and a beam would be enough for a point-to-point link.
> > > > > > >
> > > > > > > Bob Meister WA1MIK did an article on converting the
> > > > > > > multiplier chains so that the UHF Micor receivers could
> > > > > > > hear down as low as 435 MHz (where the front ends
> > > > > > > run out of tuning range).
> > > > > > >
> > > > > > > Mike WA6ILQ
> > > > > > >
> > > > > > > At 05:10 PM 07/27/10, you wrote:
> > > > > > > >Thanks Jeff, I'll keep looking around for those low split UHF
> > > Micor
> > > > > > > >receivers. What about the transmit side?
> > > > > > > >
> > > > > > > >Maybe I should look for a unified chassis low split UHF
> repeater.
> > > > > > > >Swap out the UHF receiver for a VHF high band receiver and use
> > > that
> > > > > > > >for my remote receiver site. Then use the low split UHF
> receiver
> > > on
> > > > > > > >the other end of the link.
> > > > > > > >
> > > > > > > >That make sense?
> > > > > > > >
> > > > > > > >--- In 
> > > > > > > >Repeater-Builder@yahoogroups.com
> 
> > > 
> > > > > ,
> > > > >
> > > > > > > "Jeff DePolo"  wrote:
> > > > > > > > >
> > > > > > > > > > When you say low split, are you talking ab

RE: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Eric Lemmon]

Don't force a regular (RJ-45 type) 8-wire plug into the mike jack of a CDM
radio, unless you never plan on using the DTMF mike made for those radios.
That's because the CDM radios use a 10-wire mike jack, and the shoulders of
the 8-wire plug will deform the two outside wires in the jack that are used
for row and column selection in the DTMF mike.  It is very difficult to bend
back the outside wires, once they've been damaged.  The DTMF mike for the
CDM radios does not contain a tone generator like most DTMF mikes; instead,
the button positions are fed into the radio where the tones are generated
internally.

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of MCH
Sent: Friday, July 30, 2010 9:22 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

  



They share the 
same programming cable, although most Motorola mobiles do. Hence, the 
same microphones. 


Joe M.

>> Tim - WD6AWP wrote:
>>> Are the CDM's similar to the Radius M1225?

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Tim Sawyer]

Hello Butch,

If you have sent pictures I did not get them. 
--
Tim
:wq

On Jul 30, 2010, at 9:24 PM, Glenn (Butch) Kanvick wrote:

> 
> Hello Tim.
> Yes, it is the 402-430 Mhz. split radio. I have a coupleoftheMicorsandafew 
> GEMastr II's.
>  
> The TX is on 419.3750  and the RX is on 414.4750 
>  
> I will get you pictures probably tommorrow afternoon.
>  
> Butch, KE7FEL/r
> 
> 
>  
> On Fri, Jul 30, 2010 at 6:02 PM, Tim - WD6AWP  wrote:
>  
> 
> I just need the rx, tx and pa. I can use the DC cables too. I don't need the 
> ps or cabinet. Pictures would be nice if you can send them. And you're sure 
> it's UHF low split 406-420? 
> 
> --- In Repeater-Builder@yahoogroups.com, "Glenn (Butch) Kanvick" 
>  wrote:
> >
> > Hello Tim.
> > This message made it through.
> > 
> > Do you need just the transmitter, receiver and the card cage or do you want
> > the complete radio with power supply and cabinet?
> > 
> > Do you need pictures of the repeater?
> > 
> > Thanks, Butch, KE7FEL/r
> > 
> > On Fri, Jul 30, 2010 at 5:03 PM, Tim - WD6AWP  wrote:
> > 
> > >
> > >
> > > Butch,
> > >
> > > I replied to you off list but maybe your spam filter got me. I'm 
> > > interested
> > > so please check your email.
> > >
> > > --
> > > Tim
> > >
> > > --- In 
> > > Repeater-Builder@yahoogroups.com,
> 
> > > "Glenn (Butch) Kanvick"  wrote:
> > > >
> > > > Hello Tim.
> > > >
> > > > I just looked in my storage site and I found a Micor Base/Repeater which
> > > is
> > > > on the band split of 402-430 MHz. I do not have channel elements for it.
> > > > I know it was working when it came out of service a few years ago, and
> > > the
> > > > PA can be used as a digital station, as it takes the four pin channel
> > > > elements. It is the complete base repeater which is designed for
> > > continious
> > > > duty as it has the large pa heatsinks.
> > > >
> > > > Let me know if you would like pictures of it.
> > > > I have $200.00 into it and it weighs alot so I am sure shipping via
> > > ground
> > > > would be around $50.00.
> > > >
> > > > If you need the cabinet and power supply it would be $400.00 plus actual
> > > > shipping.
> > > >
> > > >
> > > > Butch, KE7FEL/r
> > > > On Thu, Jul 29, 2010 at 1:33 PM, Tim - WD6AWP  wrote:
> > > >
> > > > >
> > > > >
> > > > > Those CDM radios are a bit pricy at $550 each. But I appreciate the
> > > > > suggestion. And you've given me some ideas.
> > > > >
> > > > > I still like the idea of building an out of band repeater for the
> > > remote
> > > > > receive site from a Micor chassis. I would need a 406-420 exciter,
> > > bandpass
> > > > > filter and trippler. If anybody on the list has those or can help me
> > > find
> > > > > them I'd really appreciate it.
> > > > >
> > > > > --- In 
> > > > > Repeater-Builder@yahoogroups.com
> > > ,
> > > > > James Adkins  wrote:
> > > > > >
> > > > > > I am using the Motorola CDM series of radios for 420-425 MHz links
> > > from
> > > > > > voting sites. They make a low-split UHF split that covers 403-470 
> > > > > > MHz
> > > out
> > > > > > of the box, no mods needed. On the transmit sites, you will want to
> > > use a
> > > > > > fan for cooling. We mount the RX radio and a UHF TX radio on a 1U
> > > rack
> > > > > > shelf, use a 4" hole saw and drill a hole under the UHF TX radio, 
> > > > > > and
> > > > > > purchase a nice Dayton 24vdc fan that is actually a ball bearing fan
> > > that
> > > > > > you can count on for years of use, and let it go. Have not had any
> > > > > problems
> > > > > > to date with these rigs over a 4 year span.
> > > > > >
> > > > > > at W6KGBs article on moving 450-470 Mastr IIs
> > > > > >
> > > > > > > to 420-450. It's on the GE Mastr II page at repeater-builder.
> > > > > > >
> > > > > > > You could use a Mastr II UHF mobile with the receiver,
> > > > > > > exciter and IPA converted to 420, then use the receiver
> > > > > > > in an aux receiver chassis at the voter site.
> > > > > > > You wouldn't need to convert the PA, the IPA (driver)
> > > > > > > and a beam would be enough for a point-to-point link.
> > > > > > >
> > > > > > > Bob Meister WA1MIK did an article on converting the
> > > > > > > multiplier chains so that the UHF Micor receivers could
> > > > > > > hear down as low as 435 MHz (where the front ends
> > > > > > > run out of tuning range).
> > > > > > >
> > > > > > > Mike WA6ILQ
> > > > > > >
> > > > > > > At 05:10 PM 07/27/10, you wrote:
> > > > > > > >Thanks Jeff, I'll keep looking around for those low split UHF
> > > Micor
> > > > > > > >receivers. What about the transmit side?
> > > > > > > >
> > > > > > > >Maybe I should look for a unified chassis low split UHF repeater.
> > > > > > > >Swap out the UHF receiver for a VHF high band receiver and use
> > > that
> > > > > > > >for my remote receiver site. Then use the low split UHF receiver
> > > on
> > > > > > > >the other end of the link.
> > > > > > > >
> > > > > > > >That make sense?
> > > > > > > >
> > > > > > > >--- In 
> > > > > > > >Repeat

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Tim Sawyer]

How about duty cycle? Do you think this set up would transmit 7x24? 
--
Tim
:wq

On Jul 28, 2010, at 7:46 PM, James Adkins wrote:

> I am using the Motorola CDM series of radios for 420-425 MHz links from 
> voting sites.  They make a low-split UHF split that covers 403-470 MHz out of 
> the box, no mods needed.  On the transmit sites, you will want to use a fan 
> for cooling.  We mount the RX radio and a UHF TX radio on a 1U rack shelf, 
> use a 4" hole saw and drill a hole under the UHF TX radio, and purchase a 
> nice Dayton 24vdc fan that is actually a ball bearing fan that you can count 
> on for years of use, and let it go.  Have not had any problems to date with 
> these rigs over a 4 year span.
> 
> 

Re: [Repeater-Builder] Re: 420Mhz Radio for Voter?

[Tim Sawyer]

Thanks Buch, I'd like to build the link so that it transmits all the time. That 
minimizes key up delays and reduces intermod on the hill. So need something 
that can key down forever.
--
Tim
:wq

On Aug 6, 2010, at 3:13 PM, Glenn (Butch) Kanvick wrote:

> Hello Tim.
> Yes, the CDM's probably will not do the 24/7 even with cooling as they are 
> designed for a 5 per cent duty cycle, maybe 10 per cent if you are very lucky 
> and it stays in an air conditioned room all of it's life. The CDM's are a 
> mobile version plus you need two of them, one for TX and one for RX, then you 
> need the Motoroal RICK to make them work.
>  
> Have a great weekend.
>  
> Butch, KE7FEL/r
> 
> On Fri, Aug 6, 2010 at 3:46 PM, Tim Sawyer  wrote:
> Oh, sorry Butch. I was asking James about the CDM radios.I know the Micor's 
> are 7x24x365. 
> --
> Tim
> :wq
> 
> On Aug 6, 2010, at 12:30 PM, Glenn (Butch) Kanvick wrote:
> 
>> Hello Tim.
>>  
>> These do not have a fan on them, but adding a fan(s) would make the air pass 
>> by the cooling fins much faster. 
>> These are the continious duty PA's with the huge heatsink on the rear of the 
>> PA. 
>> I am not sure what Motorola's duty cycle is for these PA's.
>>  
>> Attached is a picture of the PA.
>> 
>> On Fri, Aug 6, 2010 at 12:26 PM, Tim Sawyer  wrote:
>>  
>> How about duty cycle? Do you think this set up would transmit 7x24? 
>> 
>> --
>> Tim
>> :wq
>> 
>> On Jul 28, 2010, at 7:46 PM, James Adkins wrote:
>> 
>>> I am using the Motorola CDM series of radios for 420-425 MHz links from 
>>> voting sites.  They make a low-split UHF split that covers 403-470 MHz out 
>>> of the box, no mods needed.  On the transmit sites, you will want to use a 
>>> fan for cooling.  We mount the RX radio and a UHF TX radio on a 1U rack 
>>> shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and 
>>> purchase a nice Dayton 24vdc fan that is actually a ball bearing fan that 
>>> you can count on for years of use, and let it go.  Have not had any 
>>> problems to date with these rigs over a 4 year span.
>>> 
>>> 
>> 
>> 
>> 
>> 
>> 
>> <100_1894.jpg><100_1895.jpg>
> 
>