[Yaesu] FT-ONE - memory board. Anyone got one, made one, or want one?

Fri Jun 3 11:31:04 EDT 2011

David Kirkby wrote:
> I find the fact the FT-ONE will lose memories if powered off and
> disconnected from the mains unless the optional memory unit is
> installed is a bit annoying. I would have thought on a 3000ドル rig,
> Yaesu should have added the memory (only 1024 bits of SRAM), and not
> sold it as and option. But the fact is they did.

> Does anyone have one they could photograph and send a high quality
> picture? I can see the layout from the service manual.

> I was thinking of making one. Getting the original SRAM ICs wold be
> next to impossible as they are only 512 bits - modern chips would be a
> lot larger. The problem with modern chips is they have more pins, so
> the board would need to be bigger, or surface mount devices used.

 I have FT-990, FT-757 GT II and a 727R, but I don't recall the FT-ONE.
I don't know when it was made.
 All 3 of my Yaesu's have memory batteries and "Flash Memory" 
technology is not that old, the basis is, but not fast writing memory.
 I am pretty sure all of my radios have DRAM incorporated into other 
chips, not separate ICs, much like many computer mommy board BIOS ROM or 
Flash-ROM. (in with the clock and timer stuff)
-- 
 Ron KA4INM - Every HAM should have at least one desk MIC,
 it's the perfect place to hang the cans when
 CW is "arm chair copy."