[Elecraft] K2 - Revival of a resting one...
Hello all! Long time no mailing list... I have a nice, vintage K2, that I want to spruce up, tune up, and bring back to it's full MOJO. Kind of a it's not dead yet, it's just resting. Actually, it's been in use, off and on over the years, am now getting more serious about plying the airwaves. Been looking over the various places of K2 lore, for updates and so forth, Sverre's site, Don's, and of course the Elecraft site. First order of business , is it possible to have my S/N looked up? Found a database that I don't seem to be in, found that the Elecraft list archives go back to 2001, but I'm not finding a post of mine in there, so hopefully the Elecraft Records Repository would still contain it somewhere. Then I can proudly post it on the bottom of my mails, like it was done back in the day. ;-) Next, I have a range of boards for it, the NB, SSB, Antenna tuner, 160m antenna, and just built my long languishing KIO2 kit, to bring this K2-10 into the 21 (20th?) century. I have started to go thru them and see if I have all the mods and etc that should be done on them, have done many already, but back about '03-04. Guess this is just a matter of looking things up, though I have a few questions there and probably will have more. Another next, I've been having difficulty checking to see which versions of firmware are the latest, and what the various versions add. Is there a version change log or something like that? Here's what I have so far, looks like the two main ones are down a bit, but I don't know what I'm missing, or if I really need the updates. MCU 2.01f RF 1.02 KSB2 1.04 ATU 1.03 f Here's the PCB versions marked on the boards: Main rev A Control rev A ATU rev C (note, the board does NOT match the picture of the recent note stating some cut and jumper rework should be done on a rev C) NB and 160m rev D SSB don't have, will have to yank it to read So, the beginning of a journey. Will greatly appreciate whatever tips and directions I could be pointed in. Jon - KA6MOK K2 # __ 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] 32 bit Elecraft Utility Apps
Apple is starting to push 64 bit apps on the Mac. Will these change to 64 bit soon? 73, John N1JM -- Sent from: http://elecraft.365791.n2.nabble.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] K3S birdies?
Thanks Victor. I'll check that out. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, April 10, 2018 11:33 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S birdies? Make sure the internal cables with the little TNC connectors are all seated properly. A poor shield connection can contribute to birdies. Oxidation or vibration could create this condition over time. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO http://www.qsl.net/k2vco/ On 11 Apr 2018 05:47, Don Sayler wrote: > Hi All. > > I've been monitoring this list for a while, and have gained some > useful insights from the posts. And now I have a question... > > I built my K3S #11310 last July, and I added the 100 watt amp and > sub-receiver last December. > > A few weeks ago, I started hearing some unusual tones around 14380 KHz > and 7259 KHz. The tones are much louder on 14380 than on 7259. At > 14380, I hear a lower-pitched tone on 14279.80, and a higher pitched > tone 14279.85. I hear both of these with no antenna connected. On 40m, > the tone is quiet enough that the background noise overcomes the tone. > But on 20m, the tones are quite loud. I also hear the tones on the > sub-receiver. > > Prior to a few weeks ago, I'm certain these tones were not present. I > saw the thread from 2012 about moving cables around in a K3, but if > there was a build problem, wouldn't these sounds have appeared > immediately? My routers are far away from my shack, and there is no > new equipment in the shack. > > Any thoughts? > > Thanks. > > Don Sayler W7OXR Kirkland WA > __ 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...@ieee.org __ 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] K3 - Transverter IF frequencies outside the ham bands
I am contemplating building a 2 meter transverter based on a very low noise commercial100 MHz crystal oscillator that would result in a IF frequency of 44 MHz. Can the KXV3 et al be coerced into emitting 0 dBm outside the ham bands and the front panel display the transverter tuned RF frequency? The subject K3 does have the KBPF3 installed. Thanks 73, Mike, W3IP __ 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] KX2 and SCS Pactor Modem Setup
I’ve never used an SCS modem, but it should be the same as any other data mode. Use DATA A mode. Use the procedure in the KX2 manual for setting levels. Use VOX so you don’t have to worry about PTT. Set the power to 5 W. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Apr 11, 2018, at 6:17 PM, Mitch Apintiloaiei wrote: > > I’ll let you know if I figure it out. > > 73-Mitch > Km4eku > > Sent from Mail for Windows 10 > > From: Johnny Siu > Sent: Wednesday, April 11, 2018 9:15 PM > To: Mitch Apintiloaiei; elecraft@mailman.qth.net > Subject: KX2 and SCS Pactor Modem Setup > > I want to know the answer as well. I once emailed SCS about the same subject > for my KX3 but their answer is simply - don't know, never tried, don't > support > > Perhaps, SCS is mainly targeting the marine market. > > 73 > > Johnny VR2XMC > > > 寄件人︰ Mitch Apintiloaiei > 收件人︰ elecraft@mailman.qth.net > 傳送日期︰ 2018年04月12日 (週四) 8:31 AM > 主題︰ [Elecraft] KX2 and SCS Pactor Modem Setup > > Hello, > > This is my first post. I'm trying to connect an SCS 7400 modem with my KX2. > Got the RMS Express installed, and it's going through the steps without > success. I suspect my KX2 setup is not right. Does anybody here know what > the exact settings for the KX2 are? I don't seam to be able to find any > info by Google. > > Really appreciate any help you guys might be able to provide. > > 73-Mitch > km4eku > > > > __ > 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 wun...@wunderwood.org __ 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] Astron VS-35M Powwer Supply V-
On 4/11/2018 9:14 AM, Don Wilhelm wrote: You can splice a short (3 to 4 inches) length of #12 wire to the #8 or #10 wire and it will not have negligible voltage drop due to the short length. Make certain you have a good tight connection at the splice point. Yes, lots of ways to skin this cat, depending on your needs and resources. Several vendors sell adapters with a "big" grey Power Pole wired with #12 pairs to four red/black connectors, and it's easy to build your own. I find #10 to be the largest cable that I can reasonably fit into the 45A insert, so I run twisted pairs of that. I've seen statements that some of the Power Pole connector boxes have undersized circuit traces on the PCB that connects them. I use them only for accessories that draw relatively low current. 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] KX2 and SCS Pactor Modem Setup
I’ll let you know if I figure it out. 73-Mitch Km4eku Sent from Mail for Windows 10 From: Johnny Siu Sent: Wednesday, April 11, 2018 9:15 PM To: Mitch Apintiloaiei; elecraft@mailman.qth.net Subject: KX2 and SCS Pactor Modem Setup I want to know the answer as well. I once emailed SCS about the same subject for my KX3 but their answer is simply - don't know, never tried, don't support Perhaps, SCS is mainly targeting the marine market. 73 Johnny VR2XMC 寄件人︰ Mitch Apintiloaiei 收件人︰ elecraft@mailman.qth.net 傳送日期︰ 2018年04月12日 (週四) 8:31 AM 主題︰ [Elecraft] KX2 and SCS Pactor Modem Setup Hello, This is my first post. I'm trying to connect an SCS 7400 modem with my KX2. Got the RMS Express installed, and it's going through the steps without success. I suspect my KX2 setup is not right. Does anybody here know what the exact settings for the KX2 are? I don't seam to be able to find any info by Google. Really appreciate any help you guys might be able to provide. 73-Mitch km4eku __ 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] KX2 and SCS Pactor Modem Setup
I want to know the answer as well. I once emailed SCS about the same subject for my KX3 but their answer is simply - don't know, never tried, don't support Perhaps, SCS is mainly targeting the marine market. 73 Johnny VR2XMC 寄件人︰ Mitch Apintiloaiei 收件人︰ elecraft@mailman.qth.net 傳送日期︰ 2018年04月12日 (週四) 8:31 AM 主題︰ [Elecraft] KX2 and SCS Pactor Modem Setup Hello, This is my first post. I'm trying to connect an SCS 7400 modem with my KX2. Got the RMS Express installed, and it's going through the steps without success. I suspect my KX2 setup is not right. Does anybody here know what the exact settings for the KX2 are? I don't seam to be able to find any info by Google. Really appreciate any help you guys might be able to provide. 73-Mitch km4eku __ 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] KX2 and SCS Pactor Modem Setup
Hello, This is my first post. I'm trying to connect an SCS 7400 modem with my KX2. Got the RMS Express installed, and it's going through the steps without success. I suspect my KX2 setup is not right. Does anybody here know what the exact settings for the KX2 are? I don't seam to be able to find any info by Google. Really appreciate any help you guys might be able to provide. 73-Mitch km4eku __ 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] PSU cable
On 4/11/2018 2:46 PM, Ralph Parker wrote: > What I have done in the past, (with cheaper radios) is to bypass the > power connector, and solder heavy > wires directly to the DC input pads inside the radio. Thereby voiding any warranty, and with some manufacturers, being refused for any service even if paid. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ 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] PSU cable
I would appreciate it if the transceiver had bolted connections or at least double up the power poles What I have done in the past, (with cheaper radios) is to bypass the power connector, and solder heavy wires directly to the DC input pads inside the radio. The power supply end has ring terminals. Fewer connections, fewer ohms. I haven't looked to see if this would be practical for the K3, and still allow it to be disassembled. VE7XF __ 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] Astron VS-35M Powwer Supply V-
This is a one foot cable that goes from the 75 A series to the 45 A series. https://powerwerx.com/powerpole-pp75-to-pp45-adapter wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Apr 11, 2018, at 1:57 PM, j...@kk9a.com wrote: > > I have never seen the Powerpole adapter but that seems like and elegant > solution. You could even use 6awg wire with that connector if you had a > longer power supply/battery cable. > > John KK9A > > > Phil Kane k2asp wrote: > > On 4/11/2018 9:14 AM, Don Wilhelm wrote: >> John and all, >> >> You can splice a short (3 to 4 inches) length of #12 wire to the #8 or >> #10 wire and it will not have negligible voltage drop due to the short >> length. > > Or use an APP 75A fitting with 8 AWG wire and the APP 75A-30A reducing > adapter (with or without the above-recommended pigtail) to the 30A-size > fitting on the transceiver (I do that for my K2/100). The battery and > power-supply leads to my distribution system, however, are 4 AWG with > crimped lugs and stud mounts. > > 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > > __ > 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 wun...@wunderwood.org __ 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] Astron VS-35M Powwer Supply V-
I have never seen the Powerpole adapter but that seems like and elegant solution. You could even use 6awg wire with that connector if you had a longer power supply/battery cable. John KK9A Phil Kane k2asp wrote: On 4/11/2018 9:14 AM, Don Wilhelm wrote: > John and all, > > You can splice a short (3 to 4 inches) length of #12 wire to the #8 or > #10 wire and it will not have negligible voltage drop due to the short > length. Or use an APP 75A fitting with 8 AWG wire and the APP 75A-30A reducing adapter (with or without the above-recommended pigtail) to the 30A-size fitting on the transceiver (I do that for my K2/100). The battery and power-supply leads to my distribution system, however, are 4 AWG with crimped lugs and stud mounts. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 __ 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] P3 Waterfall
A button I never use ... that fixed it. I must have bumped it while re-mounting the data switch on top. Thanks, 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 4/10/2018 8:31 PM, Nr4c wrote: Tap the upper right button. Sent from my iPhone ...nr4c. bill On Apr 10, 2018, at 10:14 PM, Fred Jensen wrote: My P3 waterfall disappeared when I turned the rig on tonight. WF Height shows the line, and it moves with the knob, but no WF, just a very tall spectrum display. No SVGA. I'll maybe reload the FW tomorrow. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County __ 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 n...@widomaker.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] Astron VS-35M Powwer Supply V-
The Kenwood TS590 runs about a foot of 12 ga connected to the power supply and then the rest of the power line is double 12 ga wires to the radio. Could you reverse that and run double wire until right before the power pole and then a short single wire into the radio? That would reduce the over-all resistance in the power line and still use the single power pole jack on the radio. My power supply is a 35A Astron and I use the stock Elecraft-supplied power line. My voltage drops at least a half volt on key down. Buck, k4ia Honor Roll 8BDXCC EasyWayHamBooks.com On 4/11/2018 12:02 PM, j...@kk9a.com wrote: My 70amp Astron has 1/4" lugs and they seem to make a secure connection. Do to my longer lead length (power supply on floor) I used 8ga wire. This was difficult to stuff into the K3S sized PowerPole. Even with the shorter leads that I use on contest expeditions along with a switching power supply I found that I need 10ga wire to keep the voltage above 13.5 on TX. I think that larger PowerPoles or studs would have been nicer for those interested in keeping the K3S voltage in the desirable range. Double as Joe suggested would also work if you wanted to run two sets of wires. John KK9A Joe Subich, W4TV wrote: Ohms Law! If the transceiver power supply cable is short and heavy guage with multiple contact pins (or #10 - 1/4" bolted terminals) and #10 or 14" bolted terminals on the power supply, the impedance of the desired path in the power supply cable will be much, much less than the path through control cables (#16-#22 wires with single small pins) and any accessories. Elecraft/Astron come close with their power supply connection. I would appreciate it if the transceiver had bolted connections or at least double up the power poles and move from #12 to #10 cable. Doubling up on the power poles would allow using two (#12) cables further reducing the impedance (and voltage drop) of the desired path. 73, ... Joe, W4TV __ 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 radiok...@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] Astron VS-35M Powwer Supply V-
I just reduced the current demand by driving a KPA500 at all times :-) Wes N7WS On 4/11/2018 10:45 AM, Phil Kane wrote: On 4/11/2018 9:14 AM, Don Wilhelm wrote: John and all, You can splice a short (3 to 4 inches) length of #12 wire to the #8 or #10 wire and it will not have negligible voltage drop due to the short length. Or use an APP 75A fitting with 8 AWG wire and the APP 75A-30A reducing adapter (with or without the above-recommended pigtail) to the 30A-size fitting on the transceiver (I do that for my K2/100). The battery and power-supply leads to my distribution system, however, are 4 AWG with crimped lugs and stud mounts. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 __ 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] PSU cable
On 4/11/2018 10:30 AM, Bill Frantz wrote: > I have a TGE Boost Regulator* connected to lead-acid batteries powering > my K3. The boost regulator is set for 13.7V which drops to 13.3V during > 100W CW key down. The device is connected to the radio with about 30cm > (1 ft) of #10 zip cord and PowerPoles. I use the Boost-Regulator for my transceivers, set for 14.1V because of the lead lengths to the load breaker panel and from there to the connected devices. The input to the regulator is normally 13.8V from a supposedly-regulated AC power supply and float battery arrangement. > Car stereo installers may be a good source for flexible heavy gage wire. That's one source. I use the local marine supply company store - marine-grade wire is far more flexible than standard "stranded" wire or "zip cord".. > > Also, PowerPole has some "75A" connectors which are a lot more robust > (and not plug compatible) than the 15/30/45A ones generally seen. Adapters are available. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ 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] Astron VS-35M Powwer Supply V-
On 4/11/2018 9:14 AM, Don Wilhelm wrote: > John and all, > > You can splice a short (3 to 4 inches) length of #12 wire to the #8 or > #10 wire and it will not have negligible voltage drop due to the short > length. Or use an APP 75A fitting with 8 AWG wire and the APP 75A-30A reducing adapter (with or without the above-recommended pigtail) to the 30A-size fitting on the transceiver (I do that for my K2/100). The battery and power-supply leads to my distribution system, however, are 4 AWG with crimped lugs and stud mounts. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ 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] PSU cable
I have a TGE Boost Regulator* connected to lead-acid batteries powering my K3. The boost regulator is set for 13.7V which drops to 13.3V during 100W CW key down. The device is connected to the radio with about 30cm (1 ft) of #10 zip cord and PowerPoles. I have had problems in the past with the screws working loose on bolt attachments with some cheap Chinese equipment, so there is no substitute for checking the voltage drop under load, regardless of connector technology. Fortunately the internal volt meter in the K3(S) makes a good/look for the problem test easy. Car stereo installers may be a good source for flexible heavy gage wire. Also, PowerPole has some "75A" connectors which are a lot more robust (and not plug compatible) than the 15/30/45A ones generally seen. 73 Bill AE6JV * Notes on the TGE Boost Regulator: I have not noticed any RFI coming from it, but my antennas are away from the house on our 250 foot deep lot, so household RFI isn't as much of a factor as it would be on a smaller lot. I got the 30A circuit breaker option, and have popped it on occasion when running a FT8 frequency with low batteries. I now monitor the device's temperature with my hand and go QRT for a while when it gets too hot. Perhaps getting a device rated for more that 20A might be a good idea. During manufacture, they scraped all the numbers off the ICs in the device. My opinion of this kind of behavior can not be properly expressed in a polite forum. --- Bill Frantz| Truth and love must prevail | Periwinkle (408)356-8506 | over lies and hate. | 16345 Englewood Ave www.pwpconsult.com | - Vaclav Havel | Los Gatos, CA 95032 __ 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] Astron VS-35M Powwer Supply V-
John and all, You can splice a short (3 to 4 inches) length of #12 wire to the #8 or #10 wire and it will not have negligible voltage drop due to the short length. Make certain you have a good tight connection at the splice point. 73, Don W3FPR On 4/11/2018 12:02 PM, j...@kk9a.com wrote: My 70amp Astron has 1/4" lugs and they seem to make a secure connection. Do to my longer lead length (power supply on floor) I used 8ga wire. This was difficult to stuff into the K3S sized PowerPole. Even with the shorter leads that I use on contest expeditions along with a switching power supply I found that I need 10ga wire to keep the voltage above 13.5 on TX. I think that larger PowerPoles or studs would have been nicer for those interested in keeping the K3S voltage in the desirable range. Double as Joe suggested would also work if you wanted to run two sets of wires. __ 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] PSU cable (was Astron psu..)
I have used twisted thick wires to encourage magnetic cancelling as recommended by Jim Brown. The twisting also makes the cable easier to manipulate. I used 2 cores rescued from scrap household cable. David G3UNA > > On 11 April 2018 at 17:02 "j...@kk9a.com" wrote: > > My 70amp Astron has 1/4" lugs and they seem to make a secure connection. > Do to my longer lead length (power supply on floor) I used 8ga wire. This > was difficult to stuff into the K3S sized PowerPole. Even with the shorter > leads that I use on contest expeditions along with a switching power > supply I found that I need 10ga wire to keep the voltage above 13.5 on TX. > I think that larger PowerPoles or studs would have been nicer for those > interested in keeping the K3S voltage in the desirable range. Double as > Joe suggested would also work if you wanted to run two sets of wires. > > John KK9A > > Joe Subich, W4TV wrote: > > Ohms Law! If the transceiver power supply cable is short and heavy > guage with multiple contact pins (or #10 - 1/4" bolted terminals) > and #10 or 14" bolted terminals on the power supply, the impedance > of the desired path in the power supply cable will be much, much > less than the path through control cables (#16-#22 wires with > single small pins) and any accessories. > > Elecraft/Astron come close with their power supply connection. I > would appreciate it if the transceiver had bolted connections or > at least double up the power poles and move from #12 to #10 cable. > Doubling up on the power poles would allow using two (#12) cables > further reducing the impedance (and voltage drop) of the desired > path. > > 73, > > ... Joe, W4TV > > __ > 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.cut...@ntlworld.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] Astron VS-35M Powwer Supply V-
This is an option, I just prefer not to splice cables more than necessary. John KK9A Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone. On Wed, Apr 11, 2018 at 12:14 PM, Don Wilhelm wrote: > John and all, > > You can splice a short (3 to 4 inches) length of #12 wire to the #8 or #10 > wire and it will not have negligible voltage drop due to the short length. > Make certain you have a good tight connection at the splice point. > > 73, > Don W3FPR > > On 4/11/2018 12:02 PM, j...@kk9a.com wrote: > >> My 70amp Astron has 1/4" lugs and they seem to make a secure connection. >> Do to my longer lead length (power supply on floor) I used 8ga wire. This >> was difficult to stuff into the K3S sized PowerPole. Even with the shorter >> leads that I use on contest expeditions along with a switching power >> supply I found that I need 10ga wire to keep the voltage above 13.5 on TX. >> I think that larger PowerPoles or studs would have been nicer for those >> interested in keeping the K3S voltage in the desirable range. Double as >> Joe suggested would also work if you wanted to run two sets of wires. >> > __ 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] Astron VS-35M Powwer Supply V-
My 70amp Astron has 1/4" lugs and they seem to make a secure connection. Do to my longer lead length (power supply on floor) I used 8ga wire. This was difficult to stuff into the K3S sized PowerPole. Even with the shorter leads that I use on contest expeditions along with a switching power supply I found that I need 10ga wire to keep the voltage above 13.5 on TX. I think that larger PowerPoles or studs would have been nicer for those interested in keeping the K3S voltage in the desirable range. Double as Joe suggested would also work if you wanted to run two sets of wires. John KK9A Joe Subich, W4TV wrote: Ohms Law! If the transceiver power supply cable is short and heavy guage with multiple contact pins (or #10 - 1/4" bolted terminals) and #10 or 14" bolted terminals on the power supply, the impedance of the desired path in the power supply cable will be much, much less than the path through control cables (#16-#22 wires with single small pins) and any accessories. Elecraft/Astron come close with their power supply connection. I would appreciate it if the transceiver had bolted connections or at least double up the power poles and move from #12 to #10 cable. Doubling up on the power poles would allow using two (#12) cables further reducing the impedance (and voltage drop) of the desired path. 73, ... Joe, W4TV __ 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] Astron VS-35M Powwer Supply V-
How can you "Keep all of the transmitter power supply return current
confined to the power cable between the rig and the power supply"
when there is a path from the PS to the V- input of an accessory,
through the case of the accessory, back to the ground bus, to the
case of the radio, and from there to the V- input of the radio?
Ohms Law! If the transceiver power supply cable is short and heavy
guage with multiple contact pins (or #10 - 1/4" bolted terminals)
and #10 or 14" bolted terminals on the power supply, the impedance
of the desired path in the power supply cable will be much, much
less than the path through control cables (#16-#22 wires with
single small pins) and any accessories.
Elecraft/Astron come close with their power supply connection. I
would appreciate it if the transceiver had bolted connections or
at least double up the power poles and move from #12 to #10 cable.
Doubling up on the power poles would allow using two (#12) cables
further reducing the impedance (and voltage drop) of the desired
path.
73,
... Joe, W4TV
On 2018-04-11 2:27 AM, Victor Rosenthal 4X6GP wrote:
But since there may be multiple devices connected to the power supply,
and most of them have the V- connected to the case, then in effect there
is a path to the radio through all of these connections.
How can you "Keep all of the transmitter power supply return current
confined to the power cable between the rig and the power supply" when
there is a path from the PS to the V- input of an accessory, through the
case of the accessory, back to the ground bus, to the case of the radio,
and from there to the V- input of the radio?
Wouldn't it REDUCE the change in the ground reference to bond the V- to
the bus?
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 11 Apr 2018 00:04, Joe Subich, W4TV wrote:
On 4/10/2018 3:21 PM, Jim Brown wrote:
>
I'm probably the source of this, although W8JI and W4TV have also
raised this issue. See comments below.
>> Does that negative rail need to be bonded to the chassis?
>
> No, and in general, it should NOT be bonded.
You *DO NOT WANT* the station bonding ("ground") and the V- rail to
be interconnected. If you allow that to happen, particularly at
the transceiver and power supply, the station ground becomes an
alternate return for the high current pulses during transmit.
When the station bonding is allowed to "float" with the high current
pulses any other accessory connected to the bonding (particularly
"linear" bonding) sees a varying ground reference level which
contributes to "RF feedback" as that varying reference "pumps"
(excites) any pin 1 problem in the device.
Keep all of the transmitter power supply return current confined to
the power cable between the rig and the power supply. Make sure all
power supply connections are tight and all power cords as short as
possible. Always use the largest practical wire for all power cords.
If possible, use twisted pair cables, *bolted* connections (like
on the Astron RS/VS series power supplies) and multiple, parallel
pin connections in any power connectors.
73,
... Joe, W4TV
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