Good CB to Convert to 10m FM?

Good CB to Convert to 10m FM?

Post by Mark Schoonover - KA6WK » Thu, 13 Jun 1996 04:00:00

Thanks for reading!

I'm looking for a CB that would be relatively easy to convert to
10m FM. I have the usual equipment, etc. This would be my first
attempt and I don't know much about the different CB gear available.

73's

Mark

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

San Diego, CA                    
   Kenwood R-1000, BC2500XLT, PK232MBX/JVFAX, 66' Indoor Dipole
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 
 
 

Good CB to Convert to 10m FM?

Post by bo.. » Fri, 14 Jun 1996 04:00:00



Quote:>Thanks for reading!

>I'm looking for a CB that would be relatively easy to convert to
>10m FM. I have the usual equipment, etc. This would be my first
>attempt and I don't know much about the different CB gear available.

I've always had the impression that modifying a CB for 10m use was illegal.

Andrew (KA9VYG)

 
 
 

Good CB to Convert to 10m FM?

Post by Bruce C. Raisley A.R.S. N9ZL » Fri, 14 Jun 1996 04:00:00


> Thanks for reading!

> I'm looking for a CB that would be relatively easy to convert to
> 10m FM. I have the usual equipment, etc. This would be my first
> attempt and I don't know much about the different CB gear available.

> 73's

> Mark

> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

> San Diego, CA
>    Kenwood R-1000, BC2500XLT, PK232MBX/JVFAX, 66' Indoor Dipole
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Purchase an Ranger 2950, or a Uniden 2510 they are (Junky)CBs that have
allready been converted to 10 meters they can be converted back very
easy.
 
 
 

Good CB to Convert to 10m FM?

Post by D.W.Hemphill KC5 » Fri, 14 Jun 1996 04:00:00

(snip)

Quote:>I'm looking for a CB that would be relatively easy to convert to
>10m FM. I have the usual equipment, etc. This would be my first
>attempt and I don't know much about the different CB gear available.

(snip)

Mark,
First thing I'd suggest is locate a library or another ham who has a
complete collection of 73, QST, Ham Radio, and CQ magazines from about
1977 through 1983 (plus or minus).  Look through the December issues
of each magazine and find the Annual Index of Articles.  Search these
indices for 10m FM conversion articles.  You will find every bit of
info you need there.  I used to have a three-ring binder full of 10m
FM conversion articles, but I can't find it (I may have loaned it to
someone and never gotten it back -- bummer!).  All of the info I had
came from the sources I've suggested above.  In the early 1980s when
the 10m FM boom really took off, I converted literally dozens of the
"***net" PLL-02A chassis to 10m FM (again, look in the magazine
articles for particulars on which ones are convertible and which ones
are not).

Good luck and 73 de KC5NG

 
 
 

Good CB to Convert to 10m FM?

Post by Dave Hockada » Fri, 14 Jun 1996 04:00:00

Quote:> >I'm looking for a CB that would be relatively easy to convert to
> >10m FM. I have the usual equipment, etc. This would be my first
> >attempt and I don't know much about the different CB gear available.
> (snip)
>  Mark,

Hi Mark. I've found the 23 or 40 channel Hygain boards to be easy to
convert. The ones that use a PLL02A pll IC and 3 xtals (10.240 and 10.595
mhz and a 3rd I can't remember at this moment). They have a greenish PC
board and were made for Hygain, Midland, Kraco (K-Mart), etc. They're
pretty easy to spot around hamfests, flea markets, yard sales, etc. The
newer CB rigs are next to impossible to move into 10 meters.

I build my own FM discriminator for FM detection, and modulate the VCO
directly for true FM transmit. A model with a noise blanker is a plus.
The TX move requires a couple of the coils in the PA circuit to have a
turn or so removed.

If you drop a SASE to my callbook adress I'll be happy to send you a copy
of the info I have.

73,
Dave Hockaday Wb4iuy

http://www.webbuild.com/~wb4iuy/
http://www.webbuild.com/~wb4iuy/teara.html
http://www.RTPnet.org/~fcarc/
http://www.RTPnet.org/~rdrc/
http://www.geocities.com/TheTropics/3349/
http://www.geocities.com/TheTropics/3341/
http://www.geocities.com/TheTropics/3489/
http://www.geocities.com/TheTropics/3212/

 
 
 

Good CB to Convert to 10m FM?

Post by Bill Pa » Fri, 14 Jun 1996 04:00:00




> > Thanks for reading!

> > I'm looking for a CB that would be relatively easy to convert to
> > 10m FM. I have the usual equipment, etc. This would be my first
> > attempt and I don't know much about the different CB gear available.

> > 73's

> > Mark

-snip-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Quote:

> Purchase an Ranger 2950, or a Uniden 2510 they are (Junky)CBs that have
> allready been converted to 10 meters they can be converted back very
> easy.

That's not correct. It's the other way around. The Uniden 2510, and I
think the Ranger, are 10m amatuer radios that are easily converted to CB
bands. The 2510 is a (Non Junky)all mode transceiver for 28.1 to 29.7MHz.
One cut and jumper expands it down to 26.0Mhz.

You can use modified commercial or CB radios in the amateur bands if you
have an amateur license, but you can't modify any radio to operate in a
commercial or CB bands. Radios for non-ham bands generally need to be FCC
type-accepted, which a radio you modified would no longer be. Amateur
radios don't need to be type-accepted, so you can make/modify your own
radio for use in the ham bands.

As far as Mark's question, I have an old Uniden Cobra 148 that I've been
wanting to convert to 10M. They're readily available and the schematics
are easy to find also. I'll have to select a few new components in the RF
section because it's not going to work too well 2MHz out of band, but I
think it's reasonable to do it with this radio. It only outputs 5 watts
(all the cheaper CBs will put out around 3 watts), so it will be my QRP
radio in a couple of years when 10m opens up.

-BP

----------------------------------------------------------------

Disclaimer:
  The above post is the opinion of Bill Paul, not Qualcomm Inc.
----------------------------------------------------------------

 
 
 

Good CB to Convert to 10m FM?

Post by John Vercelli » Mon, 17 Jun 1996 04:00:00

Nope, you can modify a CB for 10 meters.  Several years ago, it was a
requirement that any CB repairs be made only by a FCC First Class
licensee.  Is that what you're referring to?

John     WB9OVV

 
 
 

Good CB to Convert to 10m FM?

Post by D.W.Hemphill KC5 » Tue, 18 Jun 1996 04:00:00

(snip)

Quote:>You can use modified commercial or CB radios in the amateur bands if you
>have an amateur license, but you can't modify any radio to operate in a
>commercial or CB bands. Radios for non-ham bands generally need to be FCC
>type-accepted, which a radio you modified would no longer be. Amateur
>radios don't need to be type-accepted, so you can make/modify your own
>radio for use in the ham bands.

You are correct on the above.  Modifying ham gear to work CB is a no-no!

Quote:>As far as Mark's question, I have an old Uniden Cobra 148 that I've been
>wanting to convert to 10M. They're readily available and the schematics
>are easy to find also. I'll have to select a few new components in the RF
>section because it's not going to work too well 2MHz out of band, but I
>think it's reasonable to do it with this radio. It only outputs 5 watts
>(all the cheaper CBs will put out around 3 watts), so it will be my QRP
>radio in a couple of years when 10m opens up.

Bill, I have converted literally DOZENS of CB rigs to 10m over the past
19 years I've been a ham.  Never once have I found a need to modify the
RF section (or any other section) to make it perform 100 percent on 10m.
You'd be surprised at how broad-banded these things are, and how far you
can tune 'em with very little effort.  Most can be tuned for anything
from 22 to 30+ MHz.  I've helped friends convert CBs to 12 meters (that's
24.9 MHz for those who didn't know) and only a re-tune was required to
make 'em work (plus the usual crystal changes, of course).  Also, what-
ever the power output was on 11m, it will be on 10m.  A typical SSB CB
rig will put out between 10 and 15 Watts PEP, and it will do the same
after 10m conversion.  If your Cobra 148 is only putting out 5 Watts on
SSB, it either desparately needs alignment, or something's wrong with
the transmitter section, or perhaps both.

You'll be pleased with the Cobra 148's performance on 10m.  I ran one
for several months during the last sunspot cycle, and I worked all over
the world with it.

73 de KC5NG

 
 
 

Good CB to Convert to 10m FM?

Post by Jim Devenpor » Wed, 19 Jun 1996 04:00:00

<snip>

Quote:> Bill, I have converted literally DOZENS of CB rigs to 10m over the past
> 19 years I've been a ham.  Never once have I found a need to modify the
> RF section (or any other section) to make it perform 100 percent on 10m.
> You'd be surprised at how broad-banded these things are, and how far you
> can tune 'em with very little effort.  Most can be tuned for anything
> from 22 to 30+ MHz.  I've helped friends convert CBs to 12 meters (that's

It takes a fair amount of work removing capacitors and turns on some of
the coils in the RF tx & receive sections but I've successfully
converted a SSB CB to 50 MHZ (as in 6 meters), and even worked another
ham several hundred miles away also running a converted CB!
Same transistors all around, only tuning changes done.

Quote:> 24.9 MHz for those who didn't know) and only a re-tune was required to
> make 'em work (plus the usual crystal changes, of course).  Also, what-
> ever the power output was on 11m, it will be on 10m.  A typical SSB CB
> rig will put out between 10 and 15 Watts PEP, and it will do the same
> after 10m conversion.  If your Cobra 148 is only putting out 5 Watts on
> SSB, it either desparately needs alignment, or something's wrong with
> the transmitter section, or perhaps both.

Perhaps he was using a typical power meter when reading the voice power
level and not realizing that, even with a sustained whistle into the
mike, the true PEP power level is usually close to twice the reading of,
say, my Bird 43 power meter reading.  
<snip>
--
|-------------------------------------------------------|
|Jim Devenport  WB5AOX                                  |
|All Standard Disclaimers Disclaimed                    |
|My views rarely (if ever) reflect those of my employers|
|http://nis-www.lanl.gov/~jdport/                       |
|-------------------------------------------------------|
 
 
 

Good CB to Convert to 10m FM?

Post by Mark Aitk » Fri, 21 Jun 1996 04:00:00

Hi Andrew,

>Date: 13 Jun 1996 02:56:43 GMT

>Subject: Good CB to Convert to 10m FM?



>>Thanks for reading!

>>I'm looking for a CB that would be relatively easy to convert to
>>10m FM. I have the usual equipment, etc. This would be my first
>>attempt and I don't know much about the different CB gear available.

>I've always had the impression that modifying a CB for 10m use was illegal.

>Andrew (KA9VYG)

Even in australia it is widely known and incouraged for hams to build and
modify there
radio for use on the ham bands,  even CB's!!!

This is what ham radio is all about!

73

Mark




mobile (014) 803 939  [Australia anyway]

 
 
 

Good CB to Convert to 10m FM?

Post by Roy Parke » Fri, 21 Jun 1996 04:00:00

Quote:> I've found the 23 or 40 channel Hygain boards to be easy to
> convert. The ones that use a PLL02A pll IC and 3 xtals (10.240 and 10.595
> mhz and a 3rd I can't remember at this moment). They have a greenish PC
> board and were made for Hygain, Midland, Kraco (K-Mart), etc.

Hi,
  Has anybody ever gotten the "odd" pll chip to work??
The "MM58141n" pll chip that is somethimes used instead of the Pll020?
  Would I be ahead to use the board for the IF and Audio stages??


 
 
 

Good CB to Convert to 10m FM?

Post by Tim C. Philli » Sat, 22 Jun 1996 04:00:00


(Mark Aitken) writes:

>Hi Andrew,

>>Date: 13 Jun 1996 02:56:43 GMT

>>Subject: Good CB to Convert to 10m FM?



>>>Thanks for reading!

>>>I'm looking for a CB that would be relatively easy to convert to
>>>10m FM. I have the usual equipment, etc. This would be my first
>>>attempt and I don't know much about the different CB gear available.

>>I've always had the impression that modifying a CB for 10m use was
illegal.

>>Andrew (KA9VYG)

>Even in australia it is widely known and incouraged for hams to build
and
>modify there
>radio for use on the ham bands,  even CB's!!!

>This is what ham radio is all about!

>73

>Mark




>mobile (014) 803 939  [Australia anyway]

 that correct no type accpt. required for ham bands and ham operators
but it would be a good idea to test outputs with the proper test
equitment before hooking it to an ant. good luck  tim kf4fco
 
 
 

Good CB to Convert to 10m FM?

Post by trave.. » Mon, 24 Jun 1996 04:00:00


Quote:> I'm looking for a CB that would be relatively easy to convert to
> 10m FM. I have the usual equipment, etc. This would be my first
> attempt and I don't know much about the different CB gear available.

I have used all three on 10 FM, converted CB's convert commercial rigs, and radios
designed for 10FM.  Converted CB's are the worse & a waste of a good radio.

Go get a old Mortac or Mastr Pro & use that.  CB's have poor IF sections & low
power.  Leave the CB on it's intended freqs where it canbe of good use.

 
 
 

Good CB to Convert to 10m FM?

Post by Dave Hockada » Wed, 26 Jun 1996 04:00:00

> > I've found the 23 or 40 channel Hygain boards to be easy to
> > convert. The ones that use a PLL02A pll IC and 3 xtals (10.240 and 10.595
> > mhz and a 3rd I can't remember at this moment). They have a greenish PC
> > board and were made for Hygain, Midland, Kraco (K-Mart), etc.
> Hi,
>   Has anybody ever gotten the "odd" pll chip to work??
> The "MM58141n" pll chip that is somethimes used instead of the Pll020?
>   Would I be ahead to use the board for the IF and Audio stages??



I'm not familiar with that chip. Was it used in the units that were
remotely controller from the mic?
--
Dave Hockaday Wb4iuy

http://www.webbuild.com/~wb4iuy/
http://www.webbuild.com/~wb4iuy/teara.html
http://www.RTPnet.org/~fcarc/
http://www.RTPnet.org/~rdrc/
http://www.geocities.com/TheTropics/3349/
http://www.geocities.com/TheTropics/3341/
http://www.geocities.com/TheTropics/3489/
http://www.geocities.com/TheTropics/3212/

 
 
 

Good CB to Convert to 10m FM?

Post by zm.. » Mon, 15 Jul 1996 04:00:00




> > I'm looking for a CB that would be relatively easy to convert to
> > 10m FM. I have the usual equipment, etc. This would be my first
> > attempt and I don't know much about the different CB gear available.

> I have used all three on 10 FM, converted CB's convert commercial rigs, and
> radios
> designed for 10FM.  Converted CB's are the worse & a waste of a good radio.

> Go get a old Mortac or Mastr Pro & use that.  CB's have poor IF sections &
> low
> power.  Leave the CB on it's intended freqs where it canbe of good use.

Don`t listen to those guys. Obviously, they have never tried it. Get yourself a
good Cobra 148 or Uniden Grant XL. These are easy to modify for 10M, just
change the xtal and re-tune the vco, mixer and RF coils. The Cobra 148 and
Grant have Excellent double - conversion recievers. Like I said, don`t listen
to the know-nothings.
Louie
N1CSS