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Author Topic: IC-7200 Frequency expansion mod  (Read 3889 times)
KB4IJ
Member

Posts: 5




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« on: July 14, 2009, 08:57:13 AM »

I am considering the purchase of an IC-7200.  Most of my operation is on MARS, so I want to be sure I can do the mod before buying the radio.

I have found the mod instructions which requires the removal of and addition of diodes.  No problem with removing but I need to know what is involved in adding the two specified diodes.  Do they need to be installed or is it just a matter of a solder bridge?

Thanks for your help

Bill
KB4IJ/NNN0TJC
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KF6OCI
Member

Posts: 104




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« Reply #1 on: September 12, 2009, 12:27:35 PM »

Sure wish someone would answer this, I was wondering
the same thing. Could you just solder bridge it?

   Dan
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KE3WD
Member

Posts: 5689




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« Reply #2 on: September 12, 2009, 12:50:52 PM »

If the use of diodes is specified, I wouldn't count on a solder bridge to not damage something.  Use diodes.  

Surface Mount diodes are readily obtainable thru parts sources such as Digi-Key, Mouser, etc.
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KF6OCI
Member

Posts: 104




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« Reply #3 on: September 13, 2009, 08:01:19 AM »

According to some that have done it, on the US version
you DON'T NEED TO ADD ANYTHING. Just remove one diode.

From the yahoo site:

RE: [ic7200] MARS/ Out Of Band Mod


If you have a US market radio, Diode 49 is the only one that needs to come
out to open up the radio completely. It is a relatively simple mod if you
have a magnifier and are steady handed. I did not attempt to unsolder the
diode but simply crushed it using a very fine-tipped pair of sidecutters.

As I recall I spent more time removing and replacing the front panel than I
did actually doing the mod.

For those who wish to do this ***so the radio may be used in emergencies***,
it is suggested that you unsolder the two speaker wires. This will allow the
entire front panel to be laid out on the bench for easy access to diode49.

Again, this info is for educational purposes only and not an inducement to
operate out-of-band.

73,
Ron WA5VFA

 Dan
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