RE: [Elecraft] K2 AUX I/O connector
Dan, I don't know if the big AMP will use ALC in any fashion, but it certainly will not get it from the KPA100 AUX I/O pin 4 - that pin is marked on the schematic as 'nc' - the KIO2 did pass along the internal ALC signal on pin 4, but it is not used with any of the Elecraft external equipment. 73, Don W3FPR > -Original Message- > > > Won't the soon to be available big AMP need the ALC Line? > > Dan / WG4S / K2 #2456 > > > I know in the past it has been posted to insert a pin in terminal 4 on the > K2 and remove the same from the corresponding plug to make them unique to > the K2. > > > Of course, this is an excellent idea if you are QRP only, like me. > ___ > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
RE: [Elecraft] K2 AUX I/O connector
Nigel, I use a thin nosed set of pliers to bend and eventually break off the male pin. On the K2 end (female), I just insert a wire or the tip of a toothpick into pin 4 (use whatever will stay firmly in the hole). There is nothing more to it - no magic or other tricks. 73, Don W3FPR > -Original Message- > > Thanks Don, for the reminder. > > I know in the past it has been posted to insert a pin in terminal 4 on the > K2 and remove the same from the corresponding plug to make them unique to > the K2. > How's the easiest way to do this? Can you pull the pin from the > male plug > and insert it into the female one or do you need to wreck another one? > > > 73, Nigel ZL2DF > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
Re: [Elecraft] K2 AUX I/O connector
Hi When I build a K2 I always solder all of the pins except pin 4 then pull out pin 4 with pliers. If you have already soldered pin 4 then you could reheat pin 4 and pull gently to remove it. You could also just cut off pin 4 as instructed in the manual. The female connector has a little plastic plug that fills the hole in pin 4 on both ends of the KPA100 ribbon cable. If you lost the little plugs or don't have them you could use a tooth pick to stick into pin 4 and then break it off or clip it with your flush cutters. This all relates to the aux I/o connector on the control board not the 9 pin on the back of the K2. On the 9 pin connector on the back of the K2 you should build the connector out of the parts supplied with the KPA100 or KIO2 and not try to use a commercially built RS232 cable. Only three pins relate to RS232 the rest are for control of Elecraft options like the KPA100 or KAT100 . Using a standard RS232 cable will destroy several components on the control board or KPA100 if it is plugged into a computer RS232 port. Don Brown KD5NDB - Original Message - From: "Nigel" <[EMAIL PROTECTED]> To: Sent: Tuesday, November 29, 2005 4:49 PM Subject: RE: [Elecraft] K2 AUX I/O connector > Thanks Don, for the reminder. > > I know in the past it has been posted to insert a pin in terminal 4 on the > K2 and remove the same from the corresponding plug to make them unique to > the K2. > How's the easiest way to do this? Can you pull the pin from the male > plug > and insert it into the female one or do you need to wreck another one? > > > 73, Nigel ZL2DF > > > > -- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
RE: [Elecraft] K2 AUX I/O connector
Won't the soon to be available big AMP need the ALC Line? Dan / WG4S / K2 #2456 I know in the past it has been posted to insert a pin in terminal 4 on the K2 and remove the same from the corresponding plug to make them unique to the K2. Of course, this is an excellent idea if you are QRP only, like me. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
RE: [Elecraft] K2 AUX I/O connector
Thanks Don, for the reminder. I know in the past it has been posted to insert a pin in terminal 4 on the K2 and remove the same from the corresponding plug to make them unique to the K2. How's the easiest way to do this? Can you pull the pin from the male plug and insert it into the female one or do you need to wreck another one? 73, Nigel ZL2DF > -- > > Message: 13 > Date: Mon, 28 Nov 2005 16:20:23 -0500 > From: "Don Wilhelm" <[EMAIL PROTECTED]> > Subject: RE: [Elecraft] K2 AUX I/O connector > To: "designer" <[EMAIL PROTECTED]>, > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="US-ASCII" > > Paul and all, > > Yes, you can fry some circuits in the K2 and KPA100 by > connecting a PC serial port to the K2 with a commonly > available 9 pin cable - the connectors fit, but it is wrong, > and it is not a K2 unique problem. snip. > > Apologies about the rant, but if it saves just one K2, it was > worth it. > > 73, > Don W3FPR > > > > -Original Message- > > > > I've heard you could fry the K2 RS232 board by using the > wrong serial > > cable - which I think is a design flaw as these cables > (null modem vs > > straight through) are not marked differently so it's easy to make a > > mistake. > > > > Should I open the cable I'm going to use up and make sure > only three > > pins are connected? thanks and 73, > > Paul > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
RE: [Elecraft] K2 AUX I/O connector
Paul and all, Yes, you can fry some circuits in the K2 and KPA100 by connecting a PC serial port to the K2 with a commonly available 9 pin cable - the connectors fit, but it is wrong, and it is not a K2 unique problem. We should all take the KIO2 and KPA100 'AUX I/O' designations that the K2 uses for that DE-9 connector seriously and explicitly - THIS IS NOT AN RS-232 CONNECTOR - (and neither does it state that it is an RS-232 or a serial connector). The fact that it just happens to be a connector that is commonly used in the PC world as a connector for RS-232 serial port connector does not make it one, and furthermore that does not say that any and all similarly looking connectors are for the same use. As an example, I work regularly with a sound mixer board that has DB-25 connectors on the rear panel, but never would I make any assumption that they are RS-232 connectors - especially when they are marked something to the contrary. To throw another fact into the pot and stir it a bit: the DB-25 connector on many PC type computers is a printer port, even though that specific connector is defined as an RS-232 connector, and similarly, all RCA jacks are not for audio signals! One should never assume that a particular type connector contains any particular configuration of wires - that is machine specific information and the machine manual must be consulted before reaching any conclusion about the use of a particular connector. As a side note, RS-232 is a signalling protocol, and yes the oficial standard does define some connectors (DB-25 and RJ-45), but the DE-9 connector is NOT defined in the RS-232 standard. The K2 AUX I/O connectors use 3 pins that are RS-232 compatible, but even that does not make it an RS-232 connector - one must check the machine documentation to determine the pinout and directional usage of the connectors before cabling to them unless you are following the machine manufacturer's specific instructions or using the manufacturer's supplied cables. Just as with multi-pin power connectors and microphone connectors, one should know that the plug (or jack) and cable are compatible before connecting them (that should be true for all cases, not just for the K2). The KPA100 and KIO2 manuals give explicit instruction on the proper cable configuration and provide suitable warnings about avoiding the use of a 'standard' (really means common) computer serial cable. Apologies about the rant, but if it saves just one K2, it was worth it. 73, Don W3FPR > -Original Message- > > I've heard you could fry the K2 RS232 board by using the wrong serial > cable - which I think is a design flaw as these cables (null modem vs > straight through) are not marked differently so it's easy to make a > mistake. > > Should I open the cable I'm going to use up and make sure only three > pins are connected? > thanks and 73, > Paul > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
