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Reviews Categories | Packet TNCs | Kantronics KPC-4 Help

Reviews Summary for Kantronics KPC-4
Kantronics KPC-4 Reviews: 2 Average rating: 4.5/5 MSRP: $$319.95
Description: KPC-4 - The first true dual-port TNC
The KPC-4 contains two built-in 1200 baud modems, 32 K RAM, and the Kantronics KA-Node networking firmware, making it ideal as a local packet switch.
Size: 1-3/4 x 6 x 8 inches (4.5 x 15.3 x 20.3 cm).
Weight: 2-1/4 lb (1.02kg).
Power supply requirement: 200 mA at 12 VDC.

*Information is taken from the Kantronics & rfconcepts Winter 1993-94 brochure.
Product is not in production.
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ZL4AX Rating: 4/5 Sep 10, 2015 20:18 Send this review to a friend
Old, but never beaten !  Time owned: more than 12 months
The KPC4 is basically two old KPC2's stuck-together, with a cross-port facility. It's in an old 1980's-style case, it has no battery backup, and teeny little memory. If the power goes off, it loses all it's messages and the clock reverts to zero, just like the bad old days.
So why are we running this out-of-date unit that should have gone into the garbage in 1988? Well, the answer is simple - it's the ONLY two-port 1200baud VHF/UHF FM packet TNC on the market, and always has been! There's simply no substitute.
About the time when Kantronics introduced their superb new range of TNC's like the KPC3, the current fad was moving towards 9600baud units. So when the KPC9612 came out, they never followed-up with a KPC1212!! And those of us who run stand-alone multi-radio nodes still keep our KPC4's alive, cos there's no substitute.
Luckily, this is true USA engineering and quality and thirty years later, all of my KPC4's are still running 24/7,365days and have never failed.
In short, it's a clumsy old unit, short on facilities and memory, and looks like your grandfather's car. But like old Abe Simpson, it just keeps on snoring away!
N4GOS Rating: 5/5 Sep 30, 2012 21:41 Send this review to a friend
Addendum to my earlier review of the KPC-4!  Time owned: 6 to 12 months
I said earlier that the KPC-4 was a bit picky on received packets, but that was because I was trying to run the TNC via the receive audio that was being supplied via my two Kenwood TM-261A radio's RJ-45 microphone jack. This audio is really low level unsquelched audio. In fact, the supplied audio from the RJ-45 microphone jack is too low for the KPC-4 to reliably decode the packets, whether the "CD" (Carrier Detect) command was set to "INTernal" or "SOFTware." After discussing the issue with an fellow Packet operator, Richard / KD4GNX were talking about he had his old KAM hooked up to his radios, and then I decided to try the old 1/8' audio plug to supply audio feed from the radio, with the volume up enough so that even the low audio, and or weak signal levels could be decoded MUCH BETTER!
**Your mileage may vary!**

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