| Author |
Message |
    
Maxwedge2
Junior Member
Username: Maxwedge2
Post Number: 19
Registered: 11-2001
| | Posted on Tuesday, April 04, 2006 - 5:13 pm: | 
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Just acquired a TS 450S Kenwood in great shape and would like to expand the coverage on 27 MHZ
At the moment, it will transmit down to 27.500 and anything lower than that is receive only.
Any help would be appreciated, thanks! |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 2672
Registered: 7-2004
| | Posted on Tuesday, April 04, 2006 - 7:53 pm: |
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Remove all screws of top and bottom case.
Remove two screws of front panel (left and right top side),and loosen two srews of front panel (left and right bottom side).
Remove all screws of digital unit ( X46-312X-XX ).
Cut the chip diode D27 (RL73) on digital unit rear side.
or if the link is good:
http://www.radiomods.co.nz/kenwood/kenwoodts450.html |
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 20
Registered: 12-2001
| | Posted on Tuesday, April 04, 2006 - 9:09 pm: |
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GENERAL COVERAGE TRANSMISSION
MODIFICATION FOR THE TS-450 AND TS-690
A) Remove all screws of top and bottom case.
B) Remove two screws of front panel
(left and right top side), and loosen two
screws of front panel (left and right bottom side).
C) Remove all screws of digital unit (X46-312X-XX).
D) Cut the chip diode D27 (RL73) on digital unit rear side.
\ [ [
[ [ \__ __\ [ [
[ [ \_ Bat. _\ [ [
[ [ [ [ [ [
[ [ __\__ \\\\\\
[ [ \\\ [ [
[ [ [_\_[ [ [ [
[ [ [ [ [ \ [ [ ->I- D27 (RL73) CUT THIS [
->I- D26 [ [
->I- D25 [ [
[ [ >I- D24 [ [
[ [ >I- D23 [ [
[ [ >I- D22 [ [
[ [ >I- D21 [ [
[ [ >I- D20 [
[ ___________________________________________ [
DIGITAL JNIT (X46-312X-XX) Component side view
[
[ This modification it is at your risk .
[\\\\\\\\\\\\\\\\\\\\\\
Best 73 Eric St-Pascal Kam. Qc. VE2MEL
=====================================
I haven't tried or verified this, proceed at your own risk. And do not
transmit outside of legal bands!
http://www.qsl.net/n3sme/ts450690.txt |
Maxwedge2
Junior Member
Username: Maxwedge2
Post Number: 20
Registered: 11-2001
| | Posted on Thursday, January 10, 2008 - 3:50 pm: |
|
I hope that this is not a duplication but will try to post this request once again pertaining to the 11 meter mod on my TS 450S Kenwood.
Was unable to perform the above mod and listed below are the reasons why.
The Digital Unit board number on my TS450S is:
X46-3120-00 with J72-0105-32 engraved below the X46 bit.
The large Eprom is JBU5 dated 1991
The above board does not have Diodes D26 or D27 as shown in the Mod diagram you kindly passed on to me.
Any help or advice would be greatly appreciated.
Thanks,
Jim |
Maxwedge2
Junior Member
Username: Maxwedge2
Post Number: 22
Registered: 11-2001
| | Posted on Saturday, January 12, 2008 - 4:20 pm: |
|
Thank you for forwarding me the below link.
www.ham.dmz.ro/kenwood/ts-450s.php,
Unfortunately there is nothing there that can help me as it says to cut chip diode D27 (RL73) which does not exist on my board.
I am at a loss as to what it will take to get this rig (TS 450S Kenwood) to expand the transmit below 27.500. Anyone else ever hear or know of this problem?
Thanks again...
Jim |
Ozfisho
Junior Member
Username: Ozfisho
Post Number: 13
Registered: 4-2012
| | Posted on Sunday, June 16, 2013 - 3:12 am: |
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When it says cut the chip diode, does that just cut it in half with the cutters or cut it at the end wires? |
Tech237
Moderator
Username: Tech237
Post Number: 1684
Registered: 4-2004
| | Posted on Sunday, June 16, 2013 - 8:55 am: |
|
Either worksd, but I've always found it better to cut the wire, as it is easier to fix if you want to restore to original condition.
By the way remember a modified Ham radio is illegal to use on 11m.
Tech237
N7AUS
God made me an athiest, who are you to question his wisdom?
|
Ozfisho
Junior Member
Username: Ozfisho
Post Number: 14
Registered: 4-2012
| | Posted on Monday, June 17, 2013 - 6:32 am: |
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Thanks tech guy. I''m doing this on another cb radio to get some more power happening. |
