[CQ-Contest] TS-440 vs. IC-765 for SS Phone

[Ron Notarius W3WN]

Hey Zack,

You wouldn't know off hand what chips are needed for the TS-140S, would you?
I found a source for the IF-232C board, but they tell me without 'the chip'
the board itself is useless.

Still not sure if it's going to be worth the bother, especially now that the
140 is becoming my "second rig" to the Corsair, but it'd still be nice to
know.

73, ron w3wn

-----Original Message-----
Date: Fri, 9 Nov 2007 09:54:52 -0600 (CST)
From: Zack Widup <w9sz at prairienet.org>
Subject: Re: [CQ-Contest] TS-440 vs. IC-765 for SS Phone
To: CQ-Contest <cq-contest at contesting.com>


The two chips needed for the TS-440 digital interface are the uPD8251A and
any CMOS 4040 (many manufacturers).

Jameco still stocks the 8251A for about $4:

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&sto
reId=10001&catalogId=10001&productId=52652

Just about every major electronics supplier sells 4040's. They're about 40
cents each.  You want the 16-pin DIP package.

Mine has been going strong for many years. I did have to clean off all the
glue from the VCO board because it was showing the dreaded VCO unlock
"dots" on the display.

73, Zack W9SZ

On Thu, 8 Nov 2007, Chet Moore wrote:

> Rick
>
> Probably the most important thing I would want in SS  is computer logging
> and to be able to click on spots using N1MM or any of the other computer
> logging programs.  The TS-440 as it came out of the box has a computer
> interface plug on the back BUT.............. you have to buy the 2 chips
to
> enable the handshaking between the 440 and the computer.  If the 440 has
> those chips installed you are ready to go.
>
> My understanding is that Kenwood no longer has the chips available.  That
is
> what i was told by the local kenwood dealer.  I ended up purchasing the
kit
> that provides everything needed by a private dealer.  I think it was $60.
> It does require you to open the front panel and plug in the two chips.
Mine
> worked like a champ.
>
> I don't know if the 746 has a computer interface.  I used my TS-440 when
> sailing merchant marine..  I had the mod in mine that allowed me to xmit
on
> 2 - 30 mcs so it was a nice backup for my shipboard xmtrs and I also had
the
> 500 kc cw filter.  There is an SSB filter which would really help on SSB
in
> a crowded band scenario such as SS SSB.  I used my 440S (AT) to make in
> excess of 120 K on both modes and thought it was a terrific radio.  My
next
> radio was an MP-1000.  After putting those radios side by side its obvious
> that the 440S has some limitations.
>
> Perhaps some one else can fill you in on the Icom 765 and if it has a
> computer interface, then you will be able to make a more accurate choice.
>
> I would have to look in my check book to find out who it was that I
> purchased my computer interface kit from.  They do have a web site but it
> was over a year ago and i don't rember the company name.   They shipped
> quickly but it still took 4 or 5 days to get the kit in the mail.
>
> press on regardless
>
> 73
>
> Chet  N4FX