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Icom ID-51 Official MARS Expanded TX & RX Mod

Moleculo

Ham Radio Nerd
Apr 14, 2002
9,194
1,674
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Here is the official modification to expand both the TX and RX capabilities of the Icom ID-51:

RX frequency expansion

A BAND
VHF: Expanded frequency range: 137.000‐174.000MHz. (FM/FMN/DV)
UHF: Expanded frequency range: 380.000‐479.000MHz. (FM/FMN/DV)

B BAND
VHF: Expanded frequency range: 108.000‐136.995MHz. (AM), 137.000‐174.000MHz. (FM)
UHF: Expanded frequency range: 380.000‐479.000MHz. (FM)

Remove D9 on Logic board.

TX frequency expansion
VHF: Expanded frequency range: 137.000‐174.000MHz. (FM/FMN/DV)
UHF: Expanded frequency range: 400.000‐479.000MHz. (FM/FMN/DV)

Remove D11 on Logic board for VHF band.
Remove D10 on Logic board for UHF band.

See the attached PDF for locations of the referenced diodes.
 

Attachments

  • ID-51 MARS CAP Mod.pdf
    169.9 KB · Views: 5,957
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Gonna regret asking this since its right in my face but, to be absolutely positive: even w the mod, there's no way to scan the 480s on the 51, right?
 
Gonna regret asking this since its right in my face but, to be absolutely positive: even w the mod, there's no way to scan the 480s on the 51, right?

Nope. I just tested it to make sure...didn't work.
 
Having a trouble with PC Software.

Hi. I have apply this mod to my id-51e and have a trouble with Cloning software(Rev 1.02). If saving on my radio expanded freq and save config to SD, and load config from SD - all working good. But if I opening this file in cloning software expanded freq with yellow triangle and if I trying save it programm give me message "Warning: error setteing found. Correct?" If I push YES this setting removing and I can upload this file in radio without expanded freq. If I push NO I can't upload this file in radio and see error message on my radio.
What can I do?
 
The mod I posted is for the U.S. version; I can't verify how well it works for the European version of the radio.
 
I tried it on a ID-51A and it is doing the same thing as the earlier comments (adds yellow triangle). Any ideas?

Are you trying to write the frequencies to a file on the MicroSD card or using a programming cable? I just verified that I have no problem writing out of band frequencies to the memory card.
 
Here is the official modification to expand both the TX and RX capabilities of the Icom ID-51:

RX frequency expansion

A BAND
VHF: Expanded frequency range: 137.000‐174.000MHz. (FM/FMN/DV)
UHF: Expanded frequency range: 380.000‐479.000MHz. (FM/FMN/DV)

B BAND
VHF: Expanded frequency range: 108.000‐136.995MHz. (AM), 137.000‐174.000MHz. (FM)
UHF: Expanded frequency range: 380.000‐479.000MHz. (FM)

Remove D9 on Logic board.

TX frequency expansion
VHF: Expanded frequency range: 137.000‐174.000MHz. (FM/FMN/DV)
UHF: Expanded frequency range: 400.000‐479.000MHz. (FM/FMN/DV)

Remove D11 on Logic board for VHF band.
Remove D10 on Logic board for UHF band.

See the attached PDF for locations of the referenced diodes.

Thank you Moleculo! I'm comparing 51A Plus and FT2D, do you know the Official MARS Expanded TX & RX Mod can also be applied on 51A Plus? If so, I will buy ICOM ID-51A Plus, thanks again.
 
Hello,
I have got the same Problem, I can TX out of band (in a dummyload ;-) ) but I can not store any qrg out of band. My dealer metioned to try the IC-51 plus cloning Software, but this one does not work for my ID-51E.
Has anybody found a solution for this Problem?
74 de
OE5MMM
 

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