Maycom EM27 Modifications
Paul Rumsam
Wilson
1000 Mag mount.
I am trying to modify my Maycom EM27 (Muppet-UK/Midband) CB.
I've been told it should cover 25Mhz to 30Mhz no problem but can't get
hold of the
technical data to do it!
I've also been informed that the Midland Allen is ease to modify and
that the
chip may be the same - anybody know anthing more?
Does anyone have: Circuit Diagrams
Information regarding modifications
Any usefull info
Any tips/warnings/comments
Also, any info about making my Uniden Bearcat 220 Scanner cover below
66Mhz!
Cheers!
Philip de Cadenet
>>My Mobile setup is a Maycom EM27 CB with a Zetagi amp (400 Watts) into a
>>Wilson
>>1000 Mag mount.
>>
>If you cant do it with 4 Watts, what's the point ?.
>
>
>Anthony Evans.
It is surely obvious to you that the powers that be gave us 4w of FM on
an oddball band of frequencies for the express purpose of limiting our
communications range.
It is for this reason why outbanders always have, and always will,
outnumber rulebook following operators on CB.
Phil / Milton Keynes
G4ZOW
Philip de Cadenet
>>It is surely obvious to you that the powers that be gave us 4w of FM on
>>an oddball band of frequencies for the express purpose of limiting our
>>communications range.
>>It is for this reason why outbanders always have, and always will,
>>outnumber rulebook following operators on CB.
>>Phil / Milton Keynes
>>G4ZOW
>
>what can be done with 4 watts or less.
I do know what can be done with 4 watts or less, I also know what cannot
be done, as I frequently hear 'them' desperately calling CQ to very
little, if any effect.
>Again, you will also know that shouting out on 27Megs using a 100 watt
>amp is wonderfull if all of those others also have 100 watt Linears,
There's a saying, that if you can't hear them, you can't work them.
Suffice to say I sorted out my receive facility befor I got addicted to
RF amplification.
>So is the future of CB to be everyone getting bigger amps than
>everyone else just so they can crawl over the top of the others ?.
>I repeat, if ya cant work it on 4 watts give up, or get an A class
>amateur licence
The simple answer is, the inevitable yes.
Having an 'A' class licence makes little difference. Have you tried
calling CQ for a regular QSO on any amateur band when there's a contest
on? Personally I'm not into contests, but I can assure you it's no
different to 555, survival of the fittest, like it or not.
Welcome to the real and exciting world of 27MHz.
Phil / Milton Keynes
Anthony R. Gold
ant...@poggo.demon.co.uk "Anthony Evans writes:
> I have NO desire to get any type of amateur licence after listening in
> on some 2M repeaters and the waffle that goes on, on Top Band.
>
> I have suggested that due to the disuse of 10M it too should be handed
> over to CB useage.
> As those that do seem to use it do so just to 'warn' off stray CBers
Let's see, you want to use 10m to chat with your friends, but you
don't want to get an amateur licence because you didn't like what you
heard on 2m repeaters and on Top Band. Did I get that right?
BTW, did you guess that you would become infected and forced to say
the things you heard, or did you fear that you would not find
agreeable companions on the amateur bands?
Anthony, why not try honesty, and say "I'm too busy {or too lazy} to
make the effort to qualify for the use of 10m." Did saying that hurt?
Since I'm in both camps I'm against both CB bashing and Ham bashing.
Regards,
--
Tony - G3SKR / W2TG email: tg...@panix.com
Richard Wood
>
> Anthony, why not try honesty, and say "I'm too busy {or too lazy} to
> make the effort to qualify for the use of 10m." Did saying that hurt?
>
> Since I'm in both camps I'm against both CB bashing and Ham bashing.
CB was intended and is a *lot* more informal than Ham.
(not talking about any sort of DXing here)
A lot of people like the informal nature of CB and do not
like the formal nature and restrictions of Ham, they
therefore use CB (or would if the idiots could be squished)
Since the idiots cannot be squished and the H.O. do not give
a damn about CB apart from collecting the money, these people
move away from the CB bands as far as is needed to loose the
wallys.
I personally do not want 10M to be converted for CB use because
that will open it up for the idiots to stomp all over.
As far as DXing with burners goes, anyone ever heard of working
QRP? Much more rewarding when you do make a good contact :-)
Just 99% of todays CBers have no patience whatsoever.....
--
Cheers,
Richard Wood
Work: Rich...@cdex.ericsson.se
Play: plat...@bigfoot.com
Nathan
Maycom EM-27 Mods
The information in this document was originally supplied by a German
radio ham.The info was e-mailed to me after I placed a message on a
German CB forum.
The radio that this info originally referred to is available in 3 models
in Germany and is sold under the Stabo name.The models are:
XM-7040 - 40 channel CEPT.
XM-7042 - 40 FM/12 AM.
XM-7082 - 80 channel German allocation.
Remove the bottom cover of the radio, look on the rear of the display
and you should see 8 jumper pads numbered as follows: 2 1 4 3 8 7 6 5
The original settings on a UK EM-27 are 2 and 3 closed and 148765 open.
For full expansion open 2 and 3 and close 5,7 and 8 the radio will then
go from 23.815-30.555Mhz but I believe it will only TX from around 26 to
just over 30Mhz.After performing the mod and re-applying power to the
radio you should see the whole display light up for a second as it
resets the CPU.
The only problem I did find was that the radio still has the UK offset
of 1.25Khz, so all channels are slightly up from the displayed
frequency, if you find out how to overcome this please let me know.
To activate the extra bands use the UK/EU button to cycle through, you
should see A,B,C,D,E THEN A+,B+,C+,D+,E+ THEN A-,B-,C-,D-,E- the minus
and plus signs being displayed just to the left of the letters at the
top of the display.Another function this mod adds is the ability to
switch between 10Khz and 5Khz channel spacing, to do this just hold down
M1 and press M6 you should hear a bleep, now the display will not have
the 5 (26.960 instead of 26.965) at the end of the frequency display
although you will still have the 1.25 offset.To revert back to 10Khz
spacing just perform the same key presses again.
To set the radio up as an 80 channel German set close jumper 3 and 4 and
open all other ones.The set will now TX/RX between 26.xxx and 27.405 but
1 - 40 are normal CEPT channels and 41 - 80 are 26.xxx - 26.955.
I hope this info is of some use to you, as I mentioned elsewhere if you
find a way to disable the UK offset please let me know also if you have
the pinout for the mic socket I would be grateful if you could e-mail
this to me.
--
Nathan
Richard Wood
>
> On Mon, 10 Aug 1998 12:58:14 +0100, Richard Wood
> <rich...@cdex.ericsson.se> wrote:
>
> >I personally do not want 10M to be converted for CB use because
> >that will open it up for the idiots to stomp all over.
> was restricted to SSB only I don't see a problem
I don't think its a case of legality, but one of affordability.
If they legalised 10M SSB (if!), it would not be long before
inexpensive 80 ch rigs incorporated it, then this new band would
just become more space for the idiots, back to square one.
Illegal SSB rigs have always held a premium price, one that the
idiots will not normally pay just to talk / play music / etc.
There will always be someone though! (remember having to drop
< 25MHz to talk once!)
Steve (M1BJR)
>> >I personally do not want 10M to be converted for CB use because
>> >that will open it up for the idiots to stomp all over.
>> But many of those using SSB use it quite responsibly,and if its use
>> was restricted to SSB only I don't see a problem
>Illegal SSB rigs have always held a premium price, one that the
>idiots will not normally pay just to talk / play music / etc.
Whatever makes you think you will get a slice of 10M for CB in the UK?
The bands are only used a fraction of what they were 10 years ago.
Regards, Steve
st...@steve999.dircon.spamfree.co.uk
Remove "spamfree" before mailing
Hamcall M1BJR.
Cornwall
England.
Richard Wood
>
> Whatever makes you think you will get a slice of 10M for CB in the UK?
> The bands are only used a fraction of what they were 10 years ago.
The government will reallocate 10M in a few years if the current
near total lack of use continues (from Hams).
And then all CBers will get well & truely splattered by those data
comms blasting out at a couple a KW each!