RS232 cable source
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In anticipation of my K3 arriving next week I'm tying to find the RS232 interface cable. I'm going to be out of town a lot and pressed for shopping time so I hope nobody minds my asking a dumb question. Where can I get the needed cable - Best Buy, Radio Shack, Wal-Mart? My K2 will now be at the lake cabin so that cable goes with it.
73, Bill NZ0T |
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Bill,
Get yourself a standard computer serial cable - straight thru wiring. You do NOT want a null modem cable or a crossover cable. The only signals that are required for K2 communications and firmware downloads are TXD and RXD (plus signal ground), but some applications also provide keying and PTT functions on the RTS and DTR signalling lines, and the K3 will respond to those if the cable has those lines present (the normal serial cable does have thes lines). 73, Don W3FPR NZ0T wrote: > In anticipation of my K3 arriving next week I'm tying to find the RS232 > interface cable. I'm going to be out of town a lot and pressed for shopping > time so I hope nobody minds my asking a dumb question. Where can I get the > needed cable - Best Buy, Radio Shack, Wal-Mart? My K2 will now be at the > lake cabin so that cable goes with it. > > 73, > > Bill NZ0T _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by NZ0T
There is a description and a picture of an appropriate serial cable in the
K3 Utility Help under the index entry "cable". I've found the several I have at small computer shops. I just found one on Radio Shack's Web Site http://www.radioshack.com/search/index.jsp?kwCatId=&kw=serial%20cable%20db-9 &origkw=serial%20cable%20db-9&sr=1 Go with a garden-variety 9-pin "straight thru" DB9 male to female cable of an appropriate length. You should prefer screws on the cable connectors so that they can be fastened securely to the jack nuts that appear on the back of the K3 and most PC DB-9 serial connectors. This is typically an inexpensive item, circa $5 to $15. 73 de Dick, K6KR -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of NZ0T Sent: Sunday, August 17, 2008 3:56 PM To: [hidden email] Subject: [Elecraft] RS232 cable source In anticipation of my K3 arriving next week I'm tying to find the RS232 interface cable. I'm going to be out of town a lot and pressed for shopping time so I hope nobody minds my asking a dumb question. Where can I get the needed cable - Best Buy, Radio Shack, Wal-Mart? My K2 will now be at the lake cabin so that cable goes with it. 73, Bill NZ0T -- View this message in context: http://n2.nabble.com/RS232-cable-source-tp729878p729878.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by NZ0T
Bill,
Just a word of Caution - though the K3 can take a standard Serial cable - I've read that the K2 CANNOT. If you plug a standard serial cable into a K2 you will Blow the I/O board. I mention that because when you mentioned your K2 was at the lake cabin, it sounded like you thought the cables were interchangeable. The K3 may work with the special K2 cable - I don't know about that. But again, It's been posted that plugging an "off the shelf" serial cable into a K2 (turned on of course) will destroy the I/O board. Paul
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Thanks Paul and yes I do know that the K2 cannot use a standard serial cable. The K3 can use the K2 cable from what I have been able to gather.
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In reply to this post by k7nhb
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In reply to this post by k7nhb
Bill and Paul,
Yes, all that is true. The K2 9 pin connector is labeled "AUX I/O" - and that does *not* mean RS-232. It does contain 2 RS-232 level signals (RXD and TXD), but also contains internal K2 signal lines. Using a standard computer serial cable on the K2 will cause damage to your K2. OTOH, you will find the K3 9 pin connector *is* labeled as RS-232, and one can safely connect a standard computer serial cable to the K3 - although the special cable made for a K2 will work to provide communications and firmware download with the K3. In general - the DB/DE series of connectors are just that - they are connectors - they do not imply serail interfaces, parallel interfaces or anything like that. Just because it looks like the serial connector on a computer does not mean that it is a serial connection. Many pieces of equipment use these connectors for a variety of uses. Know and understand your equipment, and do not make any assumptions based on 'what the connector looks like' - doing so may be a very costly mistake. 73, Don W3FPR k7nhb wrote: > Bill, > Just a word of Caution - though the K3 can take a standard Serial cable - > I've read that the K2 CANNOT. If you plug a standard serial cable into a K2 > you will Blow the I/O board. I mention that because when you mentioned your > K2 was at the lake cabin, it sounded like you thought the cables were > interchangeable. The K3 may work with the special K2 cable - I don't know > about that. But again, It's been posted that plugging an "off the shelf" > serial cable into a K2 (turned on of course) will destroy the I/O board. > Paul > > > > NZ0T wrote: >> In anticipation of my K3 arriving next week I'm tying to find the RS232 >> interface cable. I'm going to be out of town a lot and pressed for >> shopping time so I hope nobody minds my asking a dumb question. Where can >> I get the needed cable - Best Buy, Radio Shack, Wal-Mart? My K2 will now >> be at the lake cabin so that cable goes with it. >> >> 73, >> >> Bill NZ0T >> > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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