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Icom IC-T70A mod - First on the internet!

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  #1  
Old 04-01-2010, 10:00 PM
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Default Icom IC-T70A mod - First on the internet!


This is the extended TX/RX mod for the new Icom IC-T70A:

Preliminary, disassembly steps
  • First remove the battery
  • Remove the two screws that are on the heat sink / case at the base of the radio that were underneath the removed battery.
  • Remove the volume and control dials; they simply pull off.
  • Remove the nut securing the SMA antenna connector. On my radio this nut was attached overly tight and was difficult to remove even with the proper tools.
  • The entire radio board should now be able to be removed from the radio case
TX/RX Modification

Turn the board so that the button pads are facing you with the LCD screen up. Toward the top left of the number pads, remove diodes D257 (UHF TX expansion) and D258 (VHF TX expansion). On the bottom right side of the board above the mount screw, remove D264 for RX expansion if it is present. On my radio this diode was already removed. See the picture below for details on the diodes to be removed.



After modification, the TX/RX range is:

VHF: 136.000174.000 MHz
UHF: 400.000479.000 MHz


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  #2  
Old 05-01-2010, 10:57 AM
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Hi

Nice site, I just joined

Thanks for the detailed post.
I just picked up one of these radios and would like to do the Mod.
Was wondering if you could advise what the proper tool is to remove that darn SMA nut!

Have you seen a service manual out anywhere yet for this unit, always nice to have

Mike

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Old 05-01-2010, 02:18 PM
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Just came across this site also... great information - thanks!
I'd also like to know how to remove that SMA screw from the IC-T70A.

In the past, I've just used a screwdriver and a small hammer to tap and get the screw turning, but for some reason, I'm not able to use my trick on this radio.

Radio audio is GREAT... Great feel in hand also! This one is a keeper for sure, but would love to know if there is a tool to get that screw off that holds the SMA antenna port on the HT.

Thanks!!

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  #4  
Old 05-01-2010, 02:19 PM
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Here's the wrench you need, and where to get it from:

http://www.worldwidedx.com/handitalk...ditalkies.html

It's cheap. However, the nut was on REALLY tight on mine. Be very careful when trying to remove it or you'll destroy it, like I did.

I haven't seen a service manual, but it's probably available from Icom.

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Old 05-01-2010, 02:43 PM
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Thanks for the FAST reply! I'm really grateful for this information! I just finished purchasing the tool, so I'll be doing my mod as soon as the tool arrives!

PS, I think I've already damaged my screw using the small flat head screwdriver attempt I guess I'll see.

You wouldn't happen to know who sells replacement screws do you? I'll probably just call Icom for a replacement screw - I'm sure they sell them

Thanks again!!!

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Old 05-01-2010, 06:59 PM
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Thanks for the info on the tool, I ordered one as well.

Will keep you guys posted on how it goes for me when I receive it.

That looks like it is the right way to do things, I don't think I buggered up the nut on the first try with vise grips and two small screwdrivers! I stopped when something hit me in the eye! Ya the nut must be tight.

Nice to get a radio on Thursday, brand new and take it apart.

I bought it just for fun, I fix quite a few old Icom 02-at for a bush pilot up North as well as 2710h units.

Gotta go and thanks again

Mike in Saskatchewan

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  #7  
Old 05-02-2010, 10:04 AM
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Quote:
Originally Posted by ab0pj View Post
You wouldn't happen to know who sells replacement screws do you? I'll probably just call Icom for a replacement screw - I'm sure they sell them

Thanks again!!!
You can purchase parts directly from Icom by emailing or calling their tech support. It's a standard part, but I'm not sure where to get it from.

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  #8  
Old 05-03-2010, 11:07 AM
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This is from Icom Tech support

"Our service department uses a special wrench called a Spanner L wrench.
The part number is: 8960000171. Please understand that if you open the radio, it will
void your warranty, so I recommend that you do not do this until after the
one-year warranty period.

Yes, a service manual is available for this model. The part number for the manual
is: 97715527 and it is available directly from our parts department. You can contact
them by phone at: 800-346-0495 or by e-mail at: parts@icomamerica.com. I hope that this
will help."

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