You are quite right Ian. All 15 pins are NOT used as shown in the KPA500 manual (Table 1, pg 4). What I should have said is that all of the lines used are straight through. VGA cables are not wired that way.
Pins 1, 4, 6, 7, and 8 are not used. IF you buy a straight-through 15 pin cable, just break those pins off at the male connector. (That's what I did.) 73, Ron AC7AC -----Original Message----- From: dse...@dseven.org [mailto:dse...@dseven.org] On Behalf Of iain macdonnell - N6ML Sent: Thursday, August 01, 2013 9:00 PM To: Ron D'Eau Claire Cc: bwru...@gmail.com; Elecraft Reflector Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate That's not what the KPA500 manual says :- "Elecraft K3 Cable Connections This is available direct from Elecraft (pg 16): order KPAK3AUX . Pins not shown have no connection." The table shows only 10 pins. Elsewhere in the KPA500 manual, it is stated that pin 7 must not be connected to the K3. I don't have a KPAK3AUX cable to test, as I made my own custom cables. 73, ~iain / N6ML On Thu, Aug 1, 2013 at 7:51 PM, Ron D'Eau Claire <r...@cobi.biz> wrote: > The KPA3AUX cable DOES connect all 15 pins, Ian. It is simply a > straight-through cable, unlike a common VGA cable. > > If you want to use a separate PTT line (e.g. to route through some > other equipment that needs to control the amp, such as a Stepp-IR > controller) you need to use the Key Line Interrupter shown in Figure 2 > that opens the PTT line in the DB15 cable. > > 73 Ron AC7AC > > > -----Original Message----- > From: dse...@dseven.org [mailto:dse...@dseven.org] On Behalf Of iain > macdonnell - N6ML > Sent: Thursday, August 01, 2013 7:01 PM > To: Ron D'Eau Claire > Cc: bwru...@gmail.com; Elecraft Reflector > Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate > > Brian was referring to his "cable lineup" (quoted below). > > Brian, you do need two HD15 cables.... The point that Fred was making > is that one of them needs to be the Elecraft KPAK3AUX, whilst the > other one could be a straight-through cable with all 15 pins > connected. The KPAK3AUX does not connect all 15 pins, and that's > important. There is no harm in using two KPAK3AUX's, and that is > actually the safest configuration (cables designed for VGA monitor use will not necessarily work). > > The KAT500 should tune when the KPA500 is in operate mode, though - > there is a specific configuration for that in the KAT500 Utility. On > the "Configuration" tab, click "Edit Configuration...", then in the > "Amplifier Key Interrupt Power" tab , click "Optimize for Elecraft KPA500". > > 73, > > ~iain / N6ML > > > > On Thu, Aug 1, 2013 at 6:48 PM, Ron D'Eau Claire <r...@cobi.biz> wrote: >> Where do you see two DB15 cables in a diagram Brian? >> >> Ron AC7AC >> >> -----Original Message----- >> From: elecraft-boun...@mailman.qth.net >> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian F. >> Wruble >> Sent: Thursday, August 01, 2013 4:57 PM >> To: Cady, Fred >> Cc: Elecraft Reflector >> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in Operate >> >> F >> red, thanks. I am using that cable both places where my diagram says >> "DB15 Cable". >> >> I guess I needed to have invested in only one. >> >> Everything seems to work, and the tuner protection works as well. I >> proved that by lowering K3 output power to 5 watts (just to be safe), >> allowing the >> KPA500 to key and asking the KAT500 to re-tune. it refuses to do so. >> That is the right result. >> >> 73, >> >> Brian >> >> >> >> *Brian F. Wruble, C.F.A. >> >> *70 is the new 40.* >> * >> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077 >> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD >> 21930 eFax 305.768.0278 >> >> >> >> >> >> >> >> On Thu, Aug 1, 2013 at 7:08 PM, Cady, Fred <fc...@ece.montana.edu> wrote: >> >>> Hi Brian, >>> Make sure you are using a KPAK3AUX cable somewhere between the K3 >>> and the KPA500. It can be between the K3 and the KAT or the KAT and >>> the KPA. You can use a full DE15HD cable other places but the >>> KPAK3AUX cable needs to be in there somewhere. >>> Cheers, >>> Fred KE7X >>> "The Elecraft K3: Design, Configuration and Operation" >>> "The Elecraft KX3 - Going for the Summit" >>> (soon - "The Elecraft K-Line - KPA500 and KAT500") >>> >>> >>> -----Original Message----- >>> From: elecraft-boun...@mailman.qth.net [mailto: >>> elecraft-boun...@mailman.qth.net] On Behalf Of Brian F. Wruble >>> Sent: Thursday, August 01, 2013 4:17 PM >>> To: d...@w3fpr.com >>> Cc: Elecraft Reflector >>> Subject: Re: [Elecraft] K3 Receive Attenuation with KPA500 in >>> Operate >>> >>> Hi Don, >>> >>> Thanks for the prompt response. >>> >>> Yes, I am using the DB15 and the PTT line. I got it working. Here >>> is my new cable lineup: >>> >>> >>> >>> >>> 1. ACC on K3 (DB15) >>> DB15 Y Cable | >>>DB15 Cable >>> "XCVR" >>> (DB15) On >>> KAT500 >>> | >>> And | >>> > "ACC" >>> on Navigator Interface >>> >>> >>> 2. "RS232" on K3 >>> "XCVR" (RS232) on P3 >>> >>> >>> 3. "PC" on P3 >>> "RS232" on Navigator Interface >>> >>> >>> 4. "AMP" on KAT500 (DB15) >>> DB15 Cable >>> "AUX1" (DB15) on >>> KPA500 >>> >>> 5. NO PTT LINE into KPA500 or into KAT500 >>> >>> 6. No "Key Line Interupter" anyplace. >>> >>> >>> With this lineup, is the KAT500 protected from the KPA500 keying >>> when the >>> KAT500 is tuning? >>> >>> I must admit, I have mightily confused myself in this process. >>> >>> Thanks again, >>> >>> Brian W3BW >>> >>> >>> >>> *Brian F. Wruble, C.F.A. >>> >>> *70 is the new 40.* >>> * >>> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077 >>> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD >>> 21930 eFax 305.768.0278 >>> >>> >>> >>> >>> >>> >>> >>> On Thu, Aug 1, 2013 at 5:01 PM, Don Wilhelm <w3...@embarqmail.com> wrote: >>> >>> > Brian, >>> > >>> > I have heard this before, and as I recall it has to do with the >>> > DB15 cable and the PTT cable when used together. >>> > >>> > Are you using the PTT cable in addition to the cable from the K3 >>> > ACC cable? If so, pin 10 of the cable should not be included. >>> > See the note on page 8 of the KAT500 manual. >>> > >>> > Normally you would not have to use the PTT cable with the K3. See >>> > pages 3 and 4 of the KAT500 manual. For this arrangement, piin 10 >>> > of the ACC cable must be present. >>> > >>> > If you have other devices that need access ti the K3 Key Out line, >>> > you would use the PTT cable AND use the key line interrupter to >>> > disconnect pin 10 from the DB15 Interface cable without the need >>> > for removing pin >>> 10. . >>> > >>> > 73, >>> > Don W3FPR >>> > >>> > >>> > On 8/1/2013 4:30 PM, Brian F. Wruble wrote: >>> > >>> >> Hi all: >>> >> >>> >> I am running a newly assembled "K-Line" --- K3/100, KPA500 and KAT500. >>> >> The >>> >> K3 is pretty "loaded" with KRX3, KAT3, KXV3A, etc. >>> >> >>> >> I just noticed that received signals are down 4 S-units when the >>> >> KPA500 is in Operate. In Standby, signals pop right up. >>> >> >>> >> Reading past reflector emails on the topic, I found one thread >>> >> that suggested this may have to do with the state of the KPA500 >>> >> PTT. I found that pulling the PTT RCA plug out ended the problem. >>> >> >>> >> Then I replaced the PTT plug, and still had no problem. However, >>> >> once I actually transmitted, and the PTT acted to key the KPA500, >>> >> the problem recurred >>> Low sigs when the amp is in Operate, >>> >> Full sigs when in Standby. >>> >> >>> >> >>> >> >>> > >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net Please help support this >>> email >>> list: http://www.qsl.net/donate.html >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net Please help support this >> email >> list: http://www.qsl.net/donate.html >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net Please help support this >> email >> list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
