Icom IC-R71, IC-R71A, IC745A, IC-751A, IC-271A, IC-471A - ICM-1024 Memory

Description

After you purchase the ICM-1024, please let me know your Icom model.
The photos (above) show the connections to the IC-R71A Matrix and Logic Boards.
The Willco ICM-1024B "NO FAIL" memory is a replacement memory module that contains a Read Only Memory (ROM) that permanently stores the radio's important data and a battery backed Random Access Memory (RAM) that stores the radio's 32 (or 1024) memories.
Note:  This is the final production run
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THE ICM-1024 INCLUDES THE 60 METER BAND (IC-745 AND IC-751/751A ONLY)
On your IC-745 or IC-751 when you scroll through the ham bands the 60 meter band is included in the list and the PTT is enabled. The 60 meter band is channelized so store the channels in the memory locations.
YOU DON'T NEED 1024 MEMORIES? THEN IT'S EASY TO INSTALL!
For Ham radio applications you probably don't need 1024 memories and for you, the modifications aren't necessary. You can remove the ribbon cable from the ICM-1024 and simply unplug the Icom memory module from your IC-745, IC-751/A, IC-271A/H or IC-471A/H. Install our board and your radio will operate normally.
FRONT PANEL ACCESS
When the "mods" are performed on an R71A or IC-751/A, 32 banks of memories can be accessed directly from the front panel without adding push buttons or switches (the IC-745, IC-271A/H or IC-471A/H will require external switches). The heart of the ICM1024 is a custom integrated circuit that handles memory data and bank switching.
HERE'S HOW IT WORKS
Even with Icom's IC-EX310 speech option installed, the SPEECH button on your R71A or IC-751/A can be used to change banks. Simply rotate the MEMORY-CH knob and select a memory. Then press the SPEECH button and the memory bank, that corresponds to a memory number, will be selected. It's like having 32 radios in one! Each time you press the SPEECH button on the IC-751/A you step to the next bank. The FUNC button reverses the step direction and the XIT/RIT RESET button jumps you back to bank 1.
The IC-745, 751/A and the R71A was not designed to handle 1024 memories. Therefore, by storing a frequency that corresponds to a bank in channel 32, for example, you can determine which bank is being selected. 22 MHz in memory 32 can indicate that bank 22 is selected. 11 MHz in memory 32 indicates bank 11 is selected.
The Willco ICM-1024B was originally designed for the R71A receiver and a modification that connects a ribbon cable to IC pins on the radio's Matrix Board is optional. The modification satisfies the memory requirements for short-wave listeners by increasing the radio's memory capacity to 1024.
"Hot 250 H.F. frequencies are pre loaded in RAM (A Printed frequency list is included).
EXTENDED FREQUENCIES
Icom used the RAM based design so that they can easily modify the radio's frequency limits for operation in other countries. We took advantage of that and extended the H.F. frequency limits from 10 kHz to 31 MHz, for the IC745 and IC751, we added the 60 meter band from 5.25MHz to 5.45MHz.
ONE SIZE FITS ALL!
By simply adding jumpers, the ICM-1024 can be installed in an R71/R71A, IC745, IC-751/A or the IC-271A and IC-471.