[Yaesu] Perplexing Problem...

[Bill Rourke]

Scott,
     When I checked www.mods.dk I found an article titled, "FT-2400 expanded 
TRX frequency range".   There are  two photos showing the pad locations. 
The explanation tells you which pads to OPEN or CLOSE for expanded frequency 
coverage.  Looking at your radio, maybe you can "reverse engineer" where the 
original pads were set.  Good luck,
73, Bill, W7ERH


----- Original Message ----- 
From: "KB0NLY" <kb0nly at mchsi.com>
To: "Yaesu Reflector" <yaesu at mailman.qth.net>
Sent: Tuesday, October 13, 2009 12:54 PM
Subject: [Yaesu] Perplexing Problem...


> If anyone has been following along here i got a hold of a used FT-2400H 
> that needed a few repairs.  I got the memory battery replaced and it now 
> retains everything when shut off and disconnected from power, i shut it 
> off and shut off the power supply to it yesterday morning and went back 
> down this afternoon and turned it all on and lo and behold it was holding 
> its memory and bandsplit info now.
>
> A quick note on the CPU jumpers and bandsplit, never did get that working 
> quite right.  It only works 144-148Mhz on both transmit and receive, its 
> supposed to cover 140-174 on receive, i tried the procedure of holding 
> both the up and down buttons and turning the radio on, had to borrow a mic 
> to do that, and it still stays at 144-148, so oh well i can live with it.
>
> The problem is now very perplexing as to whats going on.  I was planning 
> on controlling power to the radio externally via a relay for APRS, adding 
> an ignition sensed and timed relay to it so i don't have to remember to 
> turn the radio on and off, but for some reason this still blanks the 
> radios memory.  Let me explain.
>
> Radio turned on, if you shut off the power source to the radio and then 
> turn it back on the radio looses all settings and memories.  It doesn't 
> seem to matter if its a quick off and on or a long off and on, it just 
> looses its memories unless you turn it off with the power button on the 
> radio.
>
> As i said, i already replaced the memory battery, checked its voltage, and 
> confirmed that the radio will hold its memory for more than 24 hours 
> without any power source connected, but shutting off the supply voltage to 
> it with the radio on seems to wipe all memories.
>
> Any ideas??
>
> 73,
>
> Scott  KB0NLY
>
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