Is the below link the same procedure you guys in the know would use or have used to extend Rx and Tx on your IC208H.
I come across it on the interwebz and thought i would check in to see.
Much appreciated everybody.
http://www.hampedia.net/icom/ic-208h-ex ... tx-mod.php
ICOM IC-208H extended Rx and Tx mod
Forum rules
***NOTE*** This forum and its content are not endorsed in any way by the vendor and users are advised to exercise caution when viewing and/or acting on any information contained within. We accept no responsibility for your devices and strongly warn you to check your warranty conditions and seek expert advice before proceeding.
***NOTE*** This forum and its content are not endorsed in any way by the vendor and users are advised to exercise caution when viewing and/or acting on any information contained within. We accept no responsibility for your devices and strongly warn you to check your warranty conditions and seek expert advice before proceeding.
-
- Registered User
- Posts: 14
- Joined: Sun Dec 12, 2010 7:23 pm
- Location: Middlemount, Qld
- Phantom
- Forum Manager
- Posts: 1306
- Joined: Thu May 15, 2008 12:28 pm
- Location: SE QLD
ICOM IC-208H extended Rx and Tx mod
All I can suggest - if you are asking about the mod to expand the range of the 208H - then one would guess that you should not even be mucking around with the insides of any radio
By the sounds of it - you may be on the quick path the turning a good 2/70 radio into a brick!
By the sounds of it - you may be on the quick path the turning a good 2/70 radio into a brick!
- youngn
- Forum Manager
- Posts: 498
- Joined: Sun Aug 24, 2008 11:55 am
- Location: Rochedale South
Re: ICOM IC-208H extended Rx and Tx mod
Does the IC-208H come with UHF CB out of the box???
"YOUNGN"
- Phantom
- Forum Manager
- Posts: 1306
- Joined: Thu May 15, 2008 12:28 pm
- Location: SE QLD
ICOM IC-208H extended Rx and Tx mod
Rx only (out of the box)
- 878ROB
- Registered User
- Posts: 111
- Joined: Fri Jul 31, 2009 8:43 pm
- Location: Capalaba
Re: ICOM IC-208H extended Rx and Tx mod
I done this mod to my 208H... easy mod, please do not attempt if you dont have a super dooper eyesight or magnifying glass as the 2 resistors are very small, my radio worked perfectly fine after i did the mod...
878 ROMEO OSCAR BRAVO Bleeding through a television near you!
- jaskel
- Registered User
- Posts: 330
- Joined: Sun Nov 29, 2009 7:13 am
- Location: Sydney, NSW
- Contact:
Re: ICOM IC-208H extended Rx and Tx mod
Same here, worked a treat for me! the resistors basically break apart once u heat them.
TX and RX on UHF CB fine.
The output is far lower than what u get from 2m or 70cm.
TX and RX on UHF CB fine.
The output is far lower than what u get from 2m or 70cm.
Uniden UBCD996XT, UBCD396T,Pro 96, UBC120XLT, Icom IC-208H, GME TX4220, Icom IC-F410, Discone
- 878ROB
- Registered User
- Posts: 111
- Joined: Fri Jul 31, 2009 8:43 pm
- Location: Capalaba
Re: ICOM IC-208H extended Rx and Tx mod
yes you should not operate the radio at full power!!!! keep it around mid level to keep the ass end happy...
878 ROMEO OSCAR BRAVO Bleeding through a television near you!
-
- Registered User
- Posts: 17
- Joined: Tue Feb 12, 2013 2:45 pm
Re: ICOM IC-208H extended Rx and Tx mod
Thats what amps are for....
-
- Registered User
- Posts: 17
- Joined: Tue Feb 12, 2013 2:45 pm
Re: ICOM IC-208H extended Rx and Tx mod
after my old UHF CB dieing the other week I thought I'd give my 208 a go as a UHF CB but I have discovered that the SWR is way too high, it was up around 4:1. Yes I did check to make sure the antenna and lead was in good condition. I checked it on my other car with a TX4400 and got a SWR of 1.5:1.
So with this I say would not recommmend TXing on the 477 CB range too much.
So with this I say would not recommmend TXing on the 477 CB range too much.
-
- Registered User
- Posts: 192
- Joined: Sun Jun 07, 2009 9:13 am
- Contact:
Re: ICOM IC-208H extended Rx and Tx mod
Not a good idea .. not going over this again .. but really people still dont get it
Sent from my GT-I9305T using Tapatalk
Sent from my GT-I9305T using Tapatalk
John Remington
VK3 XRI
South Eastern Communications
Radios-Communications- Pagers
facebook- https://www.facebook.com/pages/South-Ea ... 183?ref=hl
http://www.secomms.com.au
sales@secomms.com.au
0434720006
VK3 XRI
South Eastern Communications
Radios-Communications- Pagers
facebook- https://www.facebook.com/pages/South-Ea ... 183?ref=hl
http://www.secomms.com.au
sales@secomms.com.au
0434720006
- Schermann
- Registered User
- Posts: 18
- Joined: Tue Nov 29, 2011 2:36 am
Re: ICOM IC-208H extended Rx and Tx mod
Please, how to REVERSE this mod?
Does anyone know how to reverse this so that an IC-208H can be returned to AUS spec and lock out any TX on the UHF CB band?
Ok, here is the matrix diode list from the Icom IC-208H Service manual pertaining to TX/RX bandwidths.
http://www.radiomanual.info/schemi/IC208H_serv.pdf
...and here is the Matrix schematic from the service manual showing the 16 slot configurations for the S.Diodes (not resistors)!
NOTE: Position indicated above at D508 corresponds to the AUS spec but is that the only diode that is to be put back???
Any ideas as this is not covered anywhere!
Does anyone know how to reverse this so that an IC-208H can be returned to AUS spec and lock out any TX on the UHF CB band?
Ok, here is the matrix diode list from the Icom IC-208H Service manual pertaining to TX/RX bandwidths.
http://www.radiomanual.info/schemi/IC208H_serv.pdf
...and here is the Matrix schematic from the service manual showing the 16 slot configurations for the S.Diodes (not resistors)!
NOTE: Position indicated above at D508 corresponds to the AUS spec but is that the only diode that is to be put back???
Any ideas as this is not covered anywhere!