it's not so much that it won't work, it's the plug and play aspect.  The 440 
probably has a slot or port that the board goes into, or a specialized 
multi-pin connecter that has to be used.
It would have to be modified to go into the ts440.
Beyond that, it should work fine.
the other thing is, does the ts440 have front panel control of the tone 
board? if so, then it might require the TU-8 to produce any tones.  Could be 
a pretty specialized part.
I used to have an old commercial standard GX3000 with an after market tone 
board installed.  Apparently that tone board is worth it's weight in 
gold...I learned that after I threw the radio out lol.  No dip switches 
needed to be set, it just worked with whatever tone was programmed into the 
EProm.
I payed $30 for the radio on ebay, had a nice friendly ham operater in 
ontario program a new EProm with all my frequencies in it, and used it as my 
first ham rig.
After throwing the radio away, I found out the tone board sold for upwards 
of $100 on ebay because they were very difficult to get for that particular 
radio, and it seems to be a very common radio used by ham operators.  The 
GX3000 apparently is plentiful, out of older fleet companies that used 
standard VHF frequencies.  If one could obtain the EProm programmer, the 
radio is a good solid mobile radio.  allot of them were converted for 
repeater use.  Great ears, and could transmit on 30W all day long.
The stock microphone was also pretty cool because you could modify it for 
double the audio output.  All you had to do was move a small 6pin chip down 
one position and bam, great crisp loud audio without over modulating or 
distortion.
Not sure why that worked, but it seemed like a fluke.
I figured it out through pure chance.  the chip just pulled out, and when I 
went to put it back, i must have put it back in wrong so that two of the 
pins weren't in the connecter.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Howard Kaufman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, September 10, 2010 4:34 AM
Subject: Re: the midland board won't work


> Really?
> Isn't 67Hz 67Hz no matter how it's generated?  Maybe their is an output
> level difference?
> Enquiring minds want to know.