QSO UK
Welcome to QSOUK the forum for all radio users.
Sign in and enjoy No Adverts, Members Gallery and a Chat Room.

The QSOUK Team

Midland 248

View previous topic View next topic Go down

Midland 248

Post by simon007 on Tue Mar 23, 2010 9:13 pm


_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by simon007 on Tue Mar 23, 2010 9:15 pm

All the usual multi norm bits and also 25-30mhz via un-solder a jumper. New on the market place, a sample comes here the next days.

After this there is the EXCEL version on the way? So not sure what the difference is. Made in Thailand once more and maybe 10w possible. Just need to check the board and see if it is almost the same as the 278

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by simon007 on Wed Mar 31, 2010 7:58 pm


_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Thijs (cbradio.nl) on Thu Apr 01, 2010 6:50 am

simon007 wrote:
After this there is the EXCEL version on the way? So not sure what the difference is.

Preview Picture off the Midland 248 Excel with ESP

More info:
http://www.cb-world.info/Alan/Midland_248_Excel/frames_midland_248_excel.htm


Last edited by Thijs (cbradio.nl) on Tue Jun 15, 2010 3:06 pm; edited 2 times in total (Reason for editing : added link)

Thijs (cbradio.nl)
New Member
New Member

VHF / UHF Rig : KENWOOD TH-G71E
Preferred Bands : CB!!!!!!!!!!!!!!
Location : The Netherlands
Registration date : 2008-09-10
Number of posts : 16
Points : 18
Reputation : 1

http://www.cbradio.nl

Back to top Go down

Re: Midland 248

Post by simon007 on Sat Apr 03, 2010 6:47 am

Hi Thijs, Looking Good Indeed

Cut the wire and adjust the RV anti-clockwise and another radio that makes between 15-20w AM/FM on all bands including ru,sw,px etc.

Happy Easter

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by porky.69 on Tue Apr 06, 2010 11:35 pm

very nice radio. and top preview again simon. i realy like the blue display
avatar
porky.69
Member
Member

HF Rig :
HF Antenna :
Preferred Bands : all
Registration date : 2009-01-20
Number of posts : 219
Points : 222
Reputation : 10

Back to top Go down

Re: Midland 248

Post by Darkness on Tue Jun 15, 2010 6:55 am

Hello,I've cut the wire and regulated the trimmer.
I have checked the W and I have already 4W.

How is possible?

Darkness
New Member
New Member

Location : Italy
Registration date : 2010-06-15
Number of posts : 2
Points : 2
Reputation : 0

Back to top Go down

Re: Midland 248

Post by simon007 on Tue Jun 15, 2010 3:14 pm

Darkness wrote:Hello,I've cut the wire and regulated the trimmer.
I have checked the W and I have already 4W.

How is possible?

You chase me around each forum. The modification on the radio is direct from the service manual. The radio is a 10w radio and the wire makes the radio comply with CE and legal standard approvals. So, which actual radio you have??

Is it total multi norm radio and where was it bought? OR is it a simple banded one.

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Darkness on Tue Jun 15, 2010 10:11 pm

Bought in Italy, is a 248 Multi.
I've made the mod for the RU channels and today I have checked the Watt with an Rosmeter/Wattmeter and I have more or less 4.5 / 5 Watt.
I've tried on all Bands but it's all the same...

Darkness
New Member
New Member

Location : Italy
Registration date : 2010-06-15
Number of posts : 2
Points : 2
Reputation : 0

Back to top Go down

Re: Midland 248

Post by simon007 on Wed Jun 16, 2010 3:37 am

Darkness wrote:Bought in Italy, is a 248 Multi.
I've made the mod for the RU channels and today I have checked the Watt with an Rosmeter/Wattmeter and I have more or less 4.5 / 5 Watt.
I've tried on all Bands but it's all the same...

248 is manufactured by Maxon as a 10w radio, and the wire restricts it and makes it legal. Seems maybe there is something different with yours. I have modded some now, more than 10 and with the wire cut each make 10-13w as described in the manuals

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Sat Jun 26, 2010 3:32 am

My question is - can I get one here in the UK?

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by daxi on Sat Jun 26, 2010 7:08 am


_________________
You Can Get Further With A Kind Word and a Linear - than you can with just a kind word.
Old radio nuts never die, they just fade into the noise.
Best 73's means Best best wishes's.
avatar
daxi
Admin
Admin

Call Sign : M0LSX
Special Event Calls : Various.
Location : Norwich
Registration date : 2007-10-30
Number of posts : 764
Points : 839
Reputation : 42

http://www.qrz.com/M0LSX

Back to top Go down

Re: Midland 248

Post by Hiram on Sat Jun 26, 2010 6:52 pm

Thank you for the link. I did find it from a Google search, but I wasn't sure it was the same one.

If it wasn't Saturday I'd be tempted to drive down and get one.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by symonh2000 on Thu Jul 01, 2010 5:28 am

The 248 and 248 Excels are very nice looking sets. I might take a look at them, as my current rigs are getting on a bit now and could do with being retired.
avatar
symonh2000
New Member
New Member

HF Rig : Audioline PT-345
Location : Witney Oxfordshire
Registration date : 2010-04-29
Number of posts : 15
Points : 23
Reputation : 0

Back to top Go down

Re: Midland 248

Post by Hiram on Sun Aug 08, 2010 6:53 pm

I bought a 248 Multi Excel yesterday. Iíve been researching the mods for the RU band and increased power.

Am I right in assuming I need to change the solder jumpers?

OPT1 Close
OPT2 Open
OPT3 Close

I havenít opened the case up yet, so I donít know how the jumpers are configured yet, and which one need changing.

The wire jumper looks reasonably easy to cut for 10w. Do I have to turn RV 902 fully anticlockwise?

Cheers

Rob

PS, on mine the transmit LED is green for transmit and red for receive. Thatís odd isnít it?

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Sun Aug 08, 2010 11:49 pm

Depends on how yours has been set. Mine was as you told here and the mods are on www.mods.dk but some others have done the mod and have not the extras so seems to be market dependent.
BUT YOU LOOSE all warranty and on a radio like that the warranty is important so i'd not mod it, ain't worth it

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by 13TM001 on Sun Aug 08, 2010 11:53 pm

simon007 wrote:
Darkness wrote:Hello,I've cut the wire and regulated the trimmer.
I have checked the W and I have already 4W.

How is possible?

You chase me around each forum. The modification on the radio is direct from the service manual. The radio is a 10w radio and the wire makes the radio comply with CE and legal standard approvals. So, which actual radio you have??

Is it total multi norm radio and where was it bought? OR is it a simple banded one.

You feel wanted Simon?

13TM001
Member
Member

Call Sign : 13TM001
HF Rig : FT 747 GX
HF Antenna : 1/2 Wave vertical
Location : Germany (NDS)
Registration date : 2009-05-27
Number of posts : 83
Points : 120
Reputation : 9

Back to top Go down

Re: Midland 248

Post by Hiram on Mon Aug 09, 2010 12:06 am

I'll probably leave mine along for a while at least. Albeit, the 10w mod would handy, even if I didn't do the RU mod.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Mon Aug 09, 2010 3:47 am

Hiram wrote:I'll probably leave mine along for a while at least. Albeit, the 10w mod would handy, even if I didn't do the RU mod.

Understand with the 10m mod but seems some of these radios open easily and are done quick and some are not. Not sure what has happened but there are more than a handful of cases now where they have been opened and the 10w power mod simply did not work. Seems to be something different with later models or some added components maybe?

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Mon Aug 09, 2010 5:48 pm

I got onto mods.dk this morning to have a look at the mods to my 248.

I'll leave the RU mod, but I may do the 10w mods as it look easy to repair should the mod not work for me.

I fully understand the risks.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Mon Aug 09, 2010 6:50 pm

Most units need the wire cut and thats all. Not any need for anything else. Power is usually around 8-12w depending as before on the radio. Some make 15w, some struggle to 9w.

But the manual says its a 400ch 10w radio before the restrictions are added

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by simon007 on Mon Aug 09, 2010 6:51 pm

oppps forgot. Some models have the wire simply soldered together and need remove the solder and mod done, just insulate the ends of the wires and do not let them touch and thats it

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Mon Aug 09, 2010 10:07 pm

Just did the power mods on mine.

The white wire hadn't been cut or soldered - so I carefully unsoldered one end off the circuit board so I could reattach it later of needed.

In early tests into an external power meter, I seem to have about 12w now.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Mon Aug 09, 2010 10:14 pm

Hiram wrote:Just did the power mods on mine.

The white wire hadn't been cut or soldered - so I carefully unsoldered one end off the circuit board so I could reattach it later of needed.

In early tests into an external power meter, I seem to have about 12w now.

Excellent News and the power sounds about right

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Tue Aug 10, 2010 2:39 am

On closer inspection, I'd say it was more like 10w rather than the 12w I stated earlier. Still, a useful increase.

The S/Power meter on the front still displays 4w. Maybe this is where others are getting confused with this mod. But mine definitely showed an output increase once the link was removed.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Tue Aug 10, 2010 4:38 pm

Hiram wrote:On closer inspection, I'd say it was more like 10w rather than the 12w I stated earlier. Still, a useful increase.

The S/Power meter on the front still displays 4w. Maybe this is where others are getting confused with this mod. But mine definitely showed an output increase once the link was removed.

Indeed this can be true, you need to adjust the s-meter till it shows on the 10w..

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Tue Aug 10, 2010 5:51 pm

Simon wrote:you need to adjust the s-meter till it shows on the 10w..
Do you know the pot for that Simon?

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Tue Aug 10, 2010 7:41 pm

Bloody Good Question

Am not home now but think was

RX Meter: RV101
TX Meter: RV501

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Tue Aug 10, 2010 7:42 pm

simon007 wrote:
RX Meter: RV101
TX Meter: RV501
Cheers mate...

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Tue Aug 10, 2010 7:43 pm

Here is all the service docs
Attachments
ALAN48EXCEL-MULTI-all-papers.pdf Service DocsYou don't have permission to download attachments.(1.1 Mb) Downloaded 36 times

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Tue Aug 10, 2010 8:07 pm

simon007 wrote:Here is all the service docs
Thank you Simon, I very much appreciate that.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Wed Aug 11, 2010 1:33 am

Hiram wrote:
simon007 wrote:Here is all the service docs
Thank you Simon, I very much appreciate that.

Your welcome, if need anything else then let me know

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Wed Aug 18, 2010 2:19 am

I've just completed the RU mod. It was a bit tricky, but all went well in the end. Iíve checked output transmit on my scanner and it seems ok. Tried both 25.615 and 30.105 am and fm.

SW band didn't seem to work, but that is 31 MHz, so no problem. There was one other band that didn't work, can't remember now, as long as RU works I'm happy.

Cheers all.

PS
It's probably is more like 12w transmit with a fully charged car battery. While moving I get more power. Sat still for a while it drops to 10w.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

Re: Midland 248

Post by simon007 on Fri Aug 20, 2010 4:56 am

Hiram wrote:I've just completed the RU mod. It was a bit tricky, but all went well in the end. Iíve checked output transmit on my scanner and it seems ok. Tried both 25.615 and 30.105 am and fm.

SW band didn't seem to work, but that is 31 MHz, so no problem. There was one other band that didn't work, can't remember now, as long as RU works I'm happy.

Cheers all.

PS
It's probably is more like 12w transmit with a fully charged car battery. While moving I get more power. Sat still for a while it drops to 10w.

Great News Indeed. SW ain't worth it and if you have rU working then maybe its PO that is not? I cannot remember how the mod worked on mine. And about the power yes indeed, try it on AM when moving and sure the radio whistles to around 17w. Great News all ok, thats really superb to know

73s Simon

_________________
Comms from Europe: Radio User UK

Contributor: www.on-radio.de PDF Magazine NOW AVAILABLE...........
Contributor: Swiat Radio Poland

Member of the European CB Federation

Known to friends as the Wizard.
avatar
simon007
Admin
Admin

Location : Home
Registration date : 2007-10-04
Number of posts : 1612
Points : 820
Reputation : 121

Back to top Go down

Re: Midland 248

Post by Hiram on Fri Aug 20, 2010 6:13 am

[quote="simon007"]
Hiram wrote:then maybe its PO that is not?
Yes that's right Simon. It is PO that won't work. Not a big issue with me.

I've had some good contacts with the rig, the extra few watts are definitely making the difference. One breaker said my FM modulation sounded a little quiet, but Iíll wait for some more reports before I look into that.

One anomaly Ė the power meter is inconsistent. On UK40 it reads about 5w. On Mid-band and all the others its displays roughly the measured output power. A slight annoyance to be honest.

Hiram
New Member
New Member

Call Sign : 26-TM-235
Location : Newcastle Upon Tyne
Registration date : 2010-06-25
Number of posts : 13
Points : 14
Reputation : 1

Back to top Go down

how far to ajust the rv anti clockwise???

Post by royt28 on Thu May 03, 2012 10:51 pm

simon007 wrote:Hi Thijs, Looking Good Indeed

Cut the wire and adjust the RV anti-clockwise and another radio that makes between 15-20w AM/FM on all bands including ru,sw,px etc.

Happy Easter

Hi all new member, how far to ajust the rv anti clockwise? after i cut the wire

royt28
New Member
New Member

Location : london
Registration date : 2012-05-03
Number of posts : 1
Points : 1
Reputation : 0

Back to top Go down

Re: Midland 248

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum