How can I modify my Japan Radio Company JST 135 Transceiver to
transmit on the spot frequencies in the 5MHz band, recently authorised
by the UK authorities?

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Request for Question Clarification by markoft-ga on 14 Sep 2002 15:03 PDT

Just to confirm, You are talking about taking part in the Fivemegs
Experiment and you have or are appling for your NOV?

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Clarification of Question by stump-ga on 15 Sep 2002 05:26 PDT

Yes, I have not yet applied for my NoV but I wish to know whether the
JST 135 can be used on 5 MHz. As supplied by the manufacturers, it
will only transmit on the previously authorised amateur frequencies.

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Request for Question Clarification by markoft-ga on 15 Sep 2002 09:32 PDT

Have you tried the general coverage mod located at
http://www.mods.dk/mods.php3?radio=other&model=jst-135&selectid=1420#1420
?  I can't find any specific numbers but I think this will allow
transmit on all frequencies recieved buy this unit.  There are two
mods, try the code first before craking the case and cutting that
jumper.  It appears that the code will reset when you reset the power
on the unit.

Remember to use a dummy load when testing.

73 de markoft (sigh...no personally identifying info should be
posted.)

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Clarification of Question by stump-ga on 15 Sep 2002 13:20 PDT

OK, many thanks. I will try the mod given.

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Request for Question Clarification by markoft-ga on 25 Sep 2002 08:52 PDT

Was the modification sucessful?  If so I will officially answer the
question.  If not I will continue to look further.

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Clarification of Question by stump-ga on 25 Sep 2002 10:09 PDT

Yes, thank you. The modification given by Fabio was successful.

There is a general coverage mod for the JST 135 located at
http://www.mods.dk/mods.php3?radio=other&model=jst-135&selectid=1420#1420
?  I can't find any specific numbers but this should allow
transmit on all frequencies recieved by this unit.  There are two
mods, try the code first before cracking the case and cutting that
jumper.  It appears that the code will reset when you reset the power
on the unit.
 
Remember to use a dummy load when testing. 
 
73 de markoft

Answer is really given at the website quoted; identifying the website
is the clever bit!  A satisfactory result.