Re: [Elecraft] Power oscillation problem (KPA500+KAT500)
On 11/20/2023 8:00 PM, Rick NK7I wrote: In that search, high on the list of suspects (right up there with failure of any antenna elements) is damage from tiny livestock (mice, rats, birds that may have gotten into the attic or bugs like mud wasps); chewed wires, cables and insulators. More possibilities. Back in Chicago, I traced an intermittent in an antenna to a junk connector adapter. After getting back on the air in 2003 after 20+ years off, I made the mistake of restocking my parts stash with junk adapters from a Chicago flea market. Over the next five years, I traced a half dozen failures to them as a cause. My definition of a junk connector is one that isn't stamped "Belden," or with a MIL part number, or one of the types made for hard line. Perhaps a ferrite choke that is poorly designed, under-rated for the specific use, or used with a badly imbalanced antenna has failed. They do that. :) And, of course, loose connectors. 73, Jim K9YC __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Power oscillation problem (KPA500+KAT500)
Andy, You've answered your own question. If it doesn't happen when the entire rig system transmits into a dummy load, but has problems while connected to an antenna; you know where to look. In that search, high on the list of suspects (right up there with failure of any antenna elements) is damage from tiny livestock (mice, rats, birds that may have gotten into the attic or bugs like mud wasps); chewed wires, cables and insulators. However with your extended time using a 40M antenna on 80M even at 250 watts, it's likely that some part of the antenna system (feed, chokes, transformers, wires etc) has broken down (high voltages are possible causes). Something changed, you know where to look now. Be ready to replace the antenna with the means to prevent another similar failure. 73, Rick nk7i On 11/20/2023 7:16 PM, Victor Rosenthal 4X6GP wrote: This is really strange.The only thing I can think of is some kind of feedback to the TS-590s ALC circuitry caused by common mode current on the feedline. An easy test would be to connect a common mode choke at the output of the KAT500 and see if the problem goes away. Does the antenna have some kind of choke or balun at the feedpoint? If not, probably it should, just to help reduce local RFI. Why did this suddenly happen? I have no idea. Changes in grounding or any conductors attached to the system can affect the path that the common mode current takes. 73, Victor, 4X6GP Rehovot, Israel formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 21/11/2023 1:20, Andy Durbin wrote: I have a new power oscillation problem that is manifest only on 40 m when using an attic dipole. Basic station configuration is Kenwood TS-590S, KAT500, KPA500. As drive power is slowly increased and output power rises above about 100 W the power output falls to zero then slowly rises again. If drive power is increased the frequency of the oscillation increases but the peak output power does not change. At onset the oscillation frequency is 3.5 Hz. While KPA500 output power is cycling TS-590S exciter power remains constant, KPA500 remains keyed, and neither LP-100A, KPA500, nor KAT500 indicate any SWR transient. KPA500 and KAT500 do not fault. This 40 m attic dipole has been in use for several years and this problem is new. I have set any arbitrary 250 W limit for this antenna and have, in the past, experienced no significant problems running that power level. What could cause KPA500 to stop power output and then resume? The KPA500 will output 500 W into a dummy load on the same frequency with no oscillation so that seems to rule out a KPA500 hardware issue. Next suspect would be RFI but what feedback mechanism would cause KPA500 to drop to low or zero power while drive remains constant and key line remains active. Why would I have RFI now if I didn't before? Next suspect would seem to be some sort of breakdown in the antenna system and that breakdown heals when power is removed. But how could any breakdown pull power to zero and not fault KPA500 or KAT500? Next step will be visual inspection of the attic antenna. I'm posting in case anyone has seen a similar problem and has any suggestions as to the cause. Early draft notes and some scope traces here - https://www.dropbox.com/scl/fi/rxidnm4bkv9pissfyln00/Power-Oscillation-40-m-draft-1.pdf?rlkey=446vn8bjoe2bv2xn4un86zpd2=0 Thanks and 73, Andy, k3wyc __ 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 Message delivered to k2vco@gmail.com __ 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 Message delivered to rick.n...@gmail.com __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Power oscillation problem (KPA500+KAT500)
This is really strange.The only thing I can think of is some kind of feedback to the TS-590s ALC circuitry caused by common mode current on the feedline. An easy test would be to connect a common mode choke at the output of the KAT500 and see if the problem goes away. Does the antenna have some kind of choke or balun at the feedpoint? If not, probably it should, just to help reduce local RFI. Why did this suddenly happen? I have no idea. Changes in grounding or any conductors attached to the system can affect the path that the common mode current takes. 73, Victor, 4X6GP Rehovot, Israel formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 21/11/2023 1:20, Andy Durbin wrote: I have a new power oscillation problem that is manifest only on 40 m when using an attic dipole. Basic station configuration is Kenwood TS-590S, KAT500, KPA500. As drive power is slowly increased and output power rises above about 100 W the power output falls to zero then slowly rises again. If drive power is increased the frequency of the oscillation increases but the peak output power does not change. At onset the oscillation frequency is 3.5 Hz. While KPA500 output power is cycling TS-590S exciter power remains constant, KPA500 remains keyed, and neither LP-100A, KPA500, nor KAT500 indicate any SWR transient. KPA500 and KAT500 do not fault. This 40 m attic dipole has been in use for several years and this problem is new. I have set any arbitrary 250 W limit for this antenna and have, in the past, experienced no significant problems running that power level. What could cause KPA500 to stop power output and then resume? The KPA500 will output 500 W into a dummy load on the same frequency with no oscillation so that seems to rule out a KPA500 hardware issue. Next suspect would be RFI but what feedback mechanism would cause KPA500 to drop to low or zero power while drive remains constant and key line remains active. Why would I have RFI now if I didn't before? Next suspect would seem to be some sort of breakdown in the antenna system and that breakdown heals when power is removed. But how could any breakdown pull power to zero and not fault KPA500 or KAT500? Next step will be visual inspection of the attic antenna. I'm posting in case anyone has seen a similar problem and has any suggestions as to the cause. Early draft notes and some scope traces here - https://www.dropbox.com/scl/fi/rxidnm4bkv9pissfyln00/Power-Oscillation-40-m-draft-1.pdf?rlkey=446vn8bjoe2bv2xn4un86zpd2=0 Thanks and 73, Andy, k3wyc __ 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 Message delivered to k2vco@gmail.com __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KAT500?
Eugene, The KAT500 will work with almost any radio made in the last 40 years (or somewhat older), presuming the rig has I/O data available. If it doesn't read the band data from the radio ( on it's ACC port), there are still plenty of ways to allow it to do what it needs to do. The utility is one feature that allows finer control or management. But the KAT500 is serial port only for control purposes. It doesn't have an ethernet or wifi system. The following presumes that you have a serial (or other) port on the radio for it's control and this answer may be longer than you expect. In the longer run (larger picture as your station develops), you'll want more than control of your KAT500. You'll want to be able to log, manage mode changes, band/freq changes (rig control), turn your rotor, switch antenna ports on the rig or KAT500 and myriad assorted other necessary items. Not all of the pieces are IP control but require USB or serial ports, like the KAT500. You'll find that it's all much simpler to dedicate a computer (from Raspberry Pi, Arduino up to a full fledged top line gaming system) to manage the station tasks, hardware and software; even if you're sitting there able to mash buttons. Simple just ROCKS and lowers the ... moments when things get busy or distracted and the brain makes mistakes (it protects you, a little). I did that (ALL station elements managed) and it runs quite easily. Then I ran the station equally as well, by operating the computer that runs the station, remotely. Two factors present a challenge, an adequate audio path for phone/cw, and latency (the time it takes to get from the radio to your ears, ad vice versa, no matter the path). (Remote can be across the room or anywhere with internet.) I chose and use TeamViewer for computer control and Skype for audio. (Like most hams, I'm cheap and those apps are free and available on many platforms which gives a LOT of options from phone, tablet or another computer.) Plus your contact log entries are (correctly) from the station, not where you happen to be. I've run my stations while traveling much of NA and HI while on road trips and it's still fun and a great way to keep in touch with the local gang. Depending on the OS of your choice, there are many options to choose from. Windows has FAR more options for the moment, the rig control app of your choice, a good logging program (integrated suites do much of these), KAT500 utility (check/verify readings and override choices if more than one antenna), amp control if you have one (KPA500 or KPA1500 utility apps), rotor and antenna management (PSTrotator with the SteppIR functions) and if you want, an IP power switch for shutting it all down and/or rebooting. (A remote power on for the K3 or K4, when off, they are OFF.) If you are a knob turner ham or a mouse clicker (or both), running the station is much easier when you integrate all of the aspects on one screen. It allows quicker band changes (QSY and everything follows along) and a wealth of information on the screen, as well as the hardware displays. You watch ONE place (the display), less movement required (except your eyes). Wanna make a couple quick contacts from work during your lunch break or while visiting family for the holidays? Now you know how. Only have a tiny closet for the actual station hardware but no where to put the operating chair? Now you can operate it remotely (be careful about heat removal in this case). For now, you're working on the KAT500 with the utility; expand beyond that over time and integrate everything. That means look at what you want the station to accomplish for you. Wise choices now makes it simpler later as you integrate more. And the answer to your question is yes, you'll want something to manage the KAT500 app, all the time. But it must be via it's serial port. Think bigger, go beyond. 73, Rick nk7i On 11/20/2023 5:24 PM, W2HX wrote: Ok, I've done some homework and have a good understanding of the KAT500 and the KAT Utility which seems to have all the functions I am looking for. Next question. If I want to control the KAT500 over ethernet, my understanding is I need to use the Remote server and client applications. However, it seems the remote client application seems to not have the full functionality of the KAT Utility program. Does anyone know if the full functionality of the Utility program can be available in a remote situation? Or is there where I veer into the note-red territory? 73 Eugene W2HX Subscribe to my Youtube Channel:https://www.youtube.com/@w2hx/videos __ 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 Message
Re: [Elecraft] KAT500?
I use KAT500 Utility remotely by running it on a small, inexpensive server computer at the remote station and displaying and controlling it via Chrome Remote Desktop. (There are several equivalent remote desktop programs.) Note that you can not run KAT500 Utility and KAT500 Remote Server at the same time because they both use the one serial port into the KAT500 device. This arrangement has been completely satisfactory for me because the settings I make with Utility endure for many months, only occasionally changing in response to antenna changes. In fact, since I am there at the remote site when changing antennas, I rarely need to operate Utility remotely. But I certainly can. KAT500 Remote is the control point in use when actually operating on the air with KAT500. 73, /Rick N6XI On Mon, Nov 20, 2023 at 5:25 PM W2HX wrote: > Ok, I've done some homework and have a good understanding of the KAT500 > and the KAT Utility which seems to have all the functions I am looking for. > > Next question. If I want to control the KAT500 over ethernet, my > understanding is I need to use the Remote server and client applications. > However, it seems the remote client application seems to not have the full > functionality of the KAT Utility program. Does anyone know if the full > functionality of the Utility program can be available in a remote > situation? Or is there where I veer into the note-red territory? > > > 73 Eugene W2HX > Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > On Behalf Of W2HX > Sent: Sunday, November 19, 2023 5:20 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] KAT500? > > Hello there. I am not currently an owner of any elecraft product, but I am > seriously considering a KAT500 for use with older analog radios. I hope > this is the right place to ask because the elecraft website page for > subscribing to this list (https://elecraft.com/pages/community) only > mentions "KX1/K1/K2/K3/KX3/P3/KPA500" but here goes. > > I am interested in the native capabilities of the remote control software > I looked on the elecraft website and only found this manual which only > covers installation of the software: > https://ftp.elecraft.com/KAT500/Remote%20Software/KAT500-Remote.pdf > > __ > 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 > Message delivered to rta...@gmail.com > -- -- Rick Tavan Truckee and Saratoga, CA __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] KAT500?
Ok, I've done some homework and have a good understanding of the KAT500 and the KAT Utility which seems to have all the functions I am looking for. Next question. If I want to control the KAT500 over ethernet, my understanding is I need to use the Remote server and client applications. However, it seems the remote client application seems to not have the full functionality of the KAT Utility program. Does anyone know if the full functionality of the Utility program can be available in a remote situation? Or is there where I veer into the note-red territory? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of W2HX Sent: Sunday, November 19, 2023 5:20 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KAT500? Hello there. I am not currently an owner of any elecraft product, but I am seriously considering a KAT500 for use with older analog radios. I hope this is the right place to ask because the elecraft website page for subscribing to this list (https://elecraft.com/pages/community) only mentions "KX1/K1/K2/K3/KX3/P3/KPA500" but here goes. I am interested in the native capabilities of the remote control software I looked on the elecraft website and only found this manual which only covers installation of the software: https://ftp.elecraft.com/KAT500/Remote%20Software/KAT500-Remote.pdf __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Power oscillation problem (KPA500+KAT500)
I have a new power oscillation problem that is manifest only on 40 m when using an attic dipole. Basic station configuration is Kenwood TS-590S, KAT500, KPA500. As drive power is slowly increased and output power rises above about 100 W the power output falls to zero then slowly rises again. If drive power is increased the frequency of the oscillation increases but the peak output power does not change. At onset the oscillation frequency is 3.5 Hz. While KPA500 output power is cycling TS-590S exciter power remains constant, KPA500 remains keyed, and neither LP-100A, KPA500, nor KAT500 indicate any SWR transient. KPA500 and KAT500 do not fault. This 40 m attic dipole has been in use for several years and this problem is new. I have set any arbitrary 250 W limit for this antenna and have, in the past, experienced no significant problems running that power level. What could cause KPA500 to stop power output and then resume? The KPA500 will output 500 W into a dummy load on the same frequency with no oscillation so that seems to rule out a KPA500 hardware issue. Next suspect would be RFI but what feedback mechanism would cause KPA500 to drop to low or zero power while drive remains constant and key line remains active. Why would I have RFI now if I didn't before? Next suspect would seem to be some sort of breakdown in the antenna system and that breakdown heals when power is removed. But how could any breakdown pull power to zero and not fault KPA500 or KAT500? Next step will be visual inspection of the attic antenna. I'm posting in case anyone has seen a similar problem and has any suggestions as to the cause. Early draft notes and some scope traces here - https://www.dropbox.com/scl/fi/rxidnm4bkv9pissfyln00/Power-Oscillation-40-m-draft-1.pdf?rlkey=446vn8bjoe2bv2xn4un86zpd2=0 Thanks and 73, Andy, k3wyc __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Kpod not Working on K3
On 19/11/2023 23:20, elecraft-requ...@mailman.qth.net wrote: Hi All, I have taken my Kpod from my K4 and put it on my K3. (I assume it works for both rigs). The K3 has had the Mod completed as per the Kpod manual with a 6.8 Ohm, 1/8 W Leaded Resistor as per pages 16-18 of the Kpod manual. Problems. 1. Kpod does not power up with the Data cable between K3 & Kpod connected (No leds lit up at all. 2. When I power Kpod with a 12v source the On led shows as does D1 - D3 when switched with the rocker switch. 3. The large tuning knob on the Kpod does not function in any way. I have tested the Data cable with a network tester it is wired correctly 2-6 pins only and they show satisfactory on the tester. The RJ45 connector on the bottom seems to be a "manufacturing connector" that later got re-used to support the K-POD. Originally, it would be able to program the main processor of the K3. Exactly how this works is on sheet 4 (of 7) of the K3 Front Panel - MCU schematics, where this connector is labelled "J3 - ICD-2". The name ICD-2, as well as the names of the signals on this connector - MCLR, PGD, PGC - are familiar if you do microchip programming and they go directly to U1 PIC18LF8722 which is the main controller for the front panel. My recommendation would be to open up the KPOD (for which schematics can also be downloaded, as well as for the K3 itself) and check if you actually get 5V, and GND correctly from the K3. I suspect that the cable is reversed or the "wrong" pin1 is clipped. I would resist the temptation to make a cable that is rolled. The signals go directly to the processor and measuring, instead of changing the cable. These flat cables have a "flat" side and a "seam side. On my Elecraft-supplied cable, one end has the seam up and the other end has the flat up. Also, if the R82 mod (6.8ohm resistor) is not fully connected then pin6 will not carry 5volts as soon as the KPOD is connected since the KPOD draws more current. Having said that - the fact that the KPOD powers up with an external 12V supply but then still doesn't communicate suggests an issue with the cable even though your description is pretty good. What software version is your K3 running? Manual says 5.54 minimal for KPOD support. Geert Jan __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] For Sale KX3/PX3 Packtenna 9:1 antenna iPortable iP60z antenna analyzer Gem Products
I think I forgot to add my email kc9...@gmail.com For sale KX3/PX3, packtenna 9:1, iP60z, gem products and more Email me if interested for pictures and details Have a Great day! Greg KC9NRO On Sun, Nov 19, 2023 at 17:24 wrote: > Send Elecraft mailing list submissions to > elecraft@mailman.qth.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.qth.net/mailman/listinfo/elecraft > or, via email, send a message with subject or body 'help' to > elecraft-requ...@mailman.qth.net > > You can reach the person managing the list at > elecraft-ow...@mailman.qth.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Elecraft digest..." > > > Today's Topics: > >1. Re: Dumb question about KAT-500 Manual (Dick Dievendorff) >2. Dumb question about KAT-500 Manual (Andy Durbin) >3. Re: Dumb question about KAT-500 Manual (Tom N4LSJ) >4. W2 Watt Meter firmware load? (Glenn Maclean) >5. Kpod not Working on K3 (sem...@semaos.plus.com) >6. Re: Kpod not Working on K3 (Ed Parish) >7. K3 Resistor Values (sem...@semaos.plus.com) >8. Re: K3 Resistor Values (Paul Van Dyke) >9. Elecraft K1 for sale (Frank Krozel) > 10. Re: K3 Resistor Values (George Danner) > 11. Re: K3 Resistor Values (M Cresap) > 12. FS: KAT500 (m...@k2qo.us) > 13. Re: K3 Resistor Values (Jim Brown) > 14. KX3/PX3, PACKTENNA 9:1, iPz60 for sale (Greg Herman) > 15. KPA-1500 on 160 (Pete Smith N4ZR) > 16. Re: KPA-1500 on 160 (Dick Dievendorff) > 17. Re: KPA-1500 on 160 (Bill Johnson) > 18. Re: KPA-1500 on 160 (Pete Smith N4ZR) > 19. Elecraft CW Net Announcement (kevin) > 20. KH1 keyer paddle spring to be changed; replacement paddles to > be shipped to all affected users (Wayne Burdick) > 21. Elecraft 80M SSB Net Announcement (Dave New, N8SBE) > 22. KAT500? (W2HX) > > > -- > > Message: 1 > Date: Tue, 14 Nov 2023 15:54:25 -0800 > From: Dick Dievendorff > To: n4...@qsl.net > Cc: Elecraft@mailman.qth.net > Subject: Re: [Elecraft] Dumb question about KAT-500 Manual > Message-ID: <2d72aa5c-acac-455d-8015-901728b5e...@elecraft.com> > Content-Type: text/plain; charset=utf-8 > > It?s not a stupid question. > > The two RCA connections are interchangeable. There is just a relay > between them that is opened to interrupt the amp key line. No other > connections. It doesn?t matter which of the connectors is connected to the > exciter or amp. > > 73 de Dick, K6KR > > > On Nov 14, 2023, at 15:51, Tom N4LSJ wrote: > > > > ?I'm going thru the KAT-500 manual (Rev D1) and on several pages it > shows key line connections. In all of them that use the RCA plug key line > connections to the KPA-500, it shows the bottom (white) jack on the KAT > going to the PA KEY on the amp and the rig's "send" line going to the top > jack on the KAT. EXCEPT: Page 15. It has the jacks on the KAT reversed. > Is that intentional? If so, why is it reversed only for the Icom? Also, I > couldn't find any errata on this on the elecraft site. Does one exist if > it's an error? > > > > Sorry if this is a stupid question. > > > > Thanks > > > > Tom N4LSJ > > > > > > __ > > 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 > > Message delivered to d...@elecraft.com > > > -- > > Message: 2 > Date: Wed, 15 Nov 2023 00:02:28 + > From: Andy Durbin > To: "elecraft@mailman.qth.net" > Subject: [Elecraft] Dumb question about KAT-500 Manual > Message-ID: > < > dm4pr10mb67913251ef6974fdf06ff0b58c...@dm4pr10mb6791.namprd10.prod.outlook.com > > > > Content-Type: text/plain; charset="iso-8859-1" > > KAT500 Key In and Key Out RCA jacks are linked by a relay contact but > connect to nothing else. It doesn't make any difference which is In and > which is Out, but I agree the documentation should be consistent. > > Andy, k3wyc > > > -- > > Message: 3 > Date: Wed, 15 Nov 2023 02:52:13 + > From: Tom N4LSJ > To: Elecraft@mailman.qth.net > Subject: Re: [Elecraft] Dumb question about KAT-500 Manual > Message-ID: > < > 0101018bd0e4bebe-56d25686-08a1-4f4b-a8a1-0e430afc3a2c-000...@us-west-2.amazonses.com > > > > Content-Type: text/plain; charset=UTF-8; format=flowed > > Excellent info from both Dick and Andy on this.. thanks! > > > On 11/14/23 18:54, Dick Dievendorff wrote: > > It?s not a stupid question. > > > > The two RCA connections are interchangeable. There is just a relay > between them that is opened to interrupt the amp key line. No other > connections. It doesn?t matter which of the connectors is
