[Elecraft] WTB: Loaded KX3
Hi, looking for loaded KX3 (KXAT3, KXBC3, KXFL3) in 100%, no issues conditions. Lower 48 or CONUS only is ok, PayPal also. Thanks for offers. 73 - Petr - http://ok1rp.blogspot.com -- 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
[Elecraft] Packing Peanuts Are Of the Devil!
On 4/18/2018 8:37 PM, Don Wilhelm wrote: Bubble wrap and packing peanuts work quite well. When someone sends me packing peanuts, I make a doll with their name on it and stick a LOT of pins in it. I also put their names, and the names of their company, on my permanent s--t list. They are absolutely miserable, a work of the devil. When I open a package, the xh$7x things blow all over the place, and thanks to static, are a huge pain to collect. Bubble wrap is great, easy to reuse or dispose of. The air bags are fine for light weight stuff if the rest of the packaging is decent. 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] KPA1500 Caution
In general, the quality of service that you perceive from the USPS, UPS or FedEx is almost completely due to the behavior of your local delivery person. None of the carriers treat your package with kid gloves, and a lot of it is automated such that they really don't pay any attention to "Fragile" notices, etc. Most of the time if your package is damaged before your local delivery person gets their hands on it, it is due to low quality packing materials used by the shipper. Judging the overall nationwide quality of the USPS, UPS or Fedex based on what you see from your local delivery people doesn't make much sense. That's why when people get in this type of discussion you hear about all the nightmares of a particular service from one person, and all the kudo's of the same service from another person. I happen to be lucky in that my local delivery people for all three services vary from very good to outstanding (my USPS carrier, when delivering a package, comes to the door with the rest of my mail, and rings the bell, waiting for me to come to the door. If I'm not home he places the package behind a post near the front door, and delivers the mail to the street mailbox). But friends living in the same town with postal workers working out of the same post office facility, have lots of bad experience with their carriers, and therefore hold a very prejudicial view of the USPS. Now there are other services that are terrible, and the problems occur throughout the system. Amazon Prime occasionally uses a service called Ontrac, which ships to 8 states in the west. At least here in Colorado, they are reprehensible, and border on fraud when it comes to making their shipping comitments. Based on online reviews, I don't think they're any better anywhere else. 73, John AC0ZG __ 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] Negative rail grounding
Gentlemen, This thread and related threads is getting well past our max OT posting limit. Please take it off list for now and report back on your final conclusions if you come to agreement. 73, Eric Moderator most of the time.. elecraft.com _..._ > On Apr 18, 2018, at 4:09 PM, Phil Kane wrote: > >> On 4/18/2018 11:28 AM, Jim Brown wrote: >> >> NEC does not apply to low voltage DC systems. > > Oh? Check NEC Section 7 , specifically Article 720, which applies > specifically to Low Voltage systems. (We do a LOT of 48V distribution > system designs.) > > Philip M. Kane Esq / P.E. (K2ASP since 1952) __ 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] KPA1500 Caution
In today's USPS, both UPS and FedEx also carry the "mail" so one cannot be sure who the "actual carrier" is. I have no home delivery of US Mail so my USPS packages are held secure inside the PO. Both UPS and FedEx delivery are drop n scoot (lucky if you are home and hear the knock). And there your lovely $5K purchase sits out in the wx available for thieves. I could opt for one of the box clusters which would result in driving 25-miles to the PO to pickup boxes too large. RFD is out of a neighbor city. My local PO is 4.5 miles. When I was still employed the PO was 0.25 mi from work which made it very convenient. Its a small town PO and they know me by name. Another reason to chose Priority Mail is that UPS/FedEx cost 2x to 3x as much for delivery to Alaska (and 2-day delivery is 3-day+ for all three services). No UPS/FedEx on weekends. PO is open on Saturday. 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@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] KPA1500 Caution
The KPA1500 and its power supply are well packed. I have unpacked and repacked them at several Elecraft Trade Shows, and I can vouch for the packing methods used. I have said this before, and I will say it again - I find USPS and UPS to be very good carriers, FedEx is usually OK, but the local deliveries using contractors often is lacking. I have been shipping and receiving many packages since 2004. I have only had one damaged that I have shipped, and that one was impaled by some sharp pointed object. Of the ones I have received, a few have had minor case damage - a result of inadequate packaging. If the package is packed so the equipment cannot shift in the box, it will not be damaged except in the event of a catastrophe. 2 inches of packing material on each side is adequate, but those newer large air bags are only adequate for packing lightweight items - they will burst with the weight on a radio. Bubble wrap and packing peanuts work quite well. 73, Don W3FPR On 4/18/2018 10:56 PM, Grant Youngman wrote: I guess we’re doing another “who’s the worst carrier” thread … My 2 cents … I’ve never had a damaged USPS shipment (large heavy box) that wasn’t the fault of the individual that packed the box. The same is true of UPS — although UPS was the only delivery service that rolled a large box end-over-end up the driveway, ensuring that the miserably poor packing would destroy the contents. Sure, your precious package may get a forklift tine through it, but you can probably pick any shipper for that one. My bet is that the KPA1500 commercial packaging it good enough that it won’t matter which carrier delivers it. There are bad stories with all of the major delivery companies. Everybody has at least one. Any one of them are more than capable of ensuring you get the black bean. Grant NQ5T My brother's brother-in-law and my brother-in-law are both USPS retirees. The stores they tell would cause you to wonder about anything sent via USPS. Just a few minutes ago I stopped at the cluster mailbox down the road to fetch my mail. My National Geographic Magazine was folded in half and permanently creased to make room for a package stuffed in the slot. There are keyed lock boxes in the cluster for such things but they weren't used. To add insult, the package wasn't even mine, but belongs to a neighbor a block away. Wes N7WS Subject: [Elecraft] KPA1500 Caution I have never had a good experience with USPS’ handling of package deliveries, particularly heavy (expensive) ones. Gary W2CS __ 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 donw...@embarqmail.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] KPA1500 Caution
That's odd. I got my shipping notice Friday (ordered first day 2.5 hours after email) and also a UPS tracking number which I have been using to track the amps progress. 73, Pete - N8TR At 06:17 PM 4/18/2018, alapa...@w2cs.net wrote: Iâm a day-2 KPA1500 patient waiter. I got the email 2 days ago and today it shipped. Thereâs one potential problem. It must have been mentioned on this reflector and I missed it. Elecraft used U.S. Postal Service (USPS) to send the amp cross-country. I have never had a good experience with USPSâ handling of package deliveries, particularly heavy (expensive) ones. If you care about the shipper, have the discussion with Elecraft up front. I should have. Good luck all. Gary W2CS __ 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] KPA1500 Caution
I guess we’re doing another “who’s the worst carrier” thread … My 2 cents … I’ve never had a damaged USPS shipment (large heavy box) that wasn’t the fault of the individual that packed the box. The same is true of UPS — although UPS was the only delivery service that rolled a large box end-over-end up the driveway, ensuring that the miserably poor packing would destroy the contents. Sure, your precious package may get a forklift tine through it, but you can probably pick any shipper for that one. My bet is that the KPA1500 commercial packaging it good enough that it won’t matter which carrier delivers it. There are bad stories with all of the major delivery companies. Everybody has at least one. Any one of them are more than capable of ensuring you get the black bean. Grant NQ5T > > My brother's brother-in-law and my brother-in-law are both USPS retirees. > The stores they tell would cause you to wonder about anything sent via USPS. > > Just a few minutes ago I stopped at the cluster mailbox down the road to > fetch my mail. My National Geographic Magazine was folded in half and > permanently creased to make room for a package stuffed in the slot. There > are keyed lock boxes in the cluster for such things but they weren't used. > > To add insult, the package wasn't even mine, but belongs to a neighbor a > block away. > > Wes N7WS > > > > Subject: [Elecraft] KPA1500 Caution >> I have never had a good experience with USPS’ handling of package >> deliveries, particularly heavy (expensive) ones. >> >> Gary W2CS __ 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] KPA1500 Caution
My brother's brother-in-law and my brother-in-law are both USPS retirees. The stores they tell would cause you to wonder about anything sent via USPS. Just a few minutes ago I stopped at the cluster mailbox down the road to fetch my mail. My National Geographic Magazine was folded in half and permanently creased to make room for a package stuffed in the slot. There are keyed lock boxes in the cluster for such things but they weren't used. To add insult, the package wasn't even mine, but belongs to a neighbor a block away. Wes N7WS Subject: [Elecraft] KPA1500 Caution I have never had a good experience with USPS’ handling of package deliveries, particularly heavy (expensive) ones. Gary W2CS __ 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] KPA1500 Caution
2 cents:I have had excellent success with UPSP priority mail. Elecraft marks the boxes very well and the packaging is superior. 73, Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Roy Koeppe Sent: Wednesday, April 18, 2018 5:40 PM To: elecraft Subject: Re: [Elecraft] KPA1500 Caution Hi, My order online invoice for KPA1500 states shipping method: UPS. 73, RoyK6XK -Original Message- From: alapa...@w2cs.net Sent: Wednesday, April 18, 2018 5:17 PM To: elecraft Subject: [Elecraft] KPA1500 Caution I’m a day-2 KPA1500 patient waiter. I got the email 2 days ago and today it shipped. There’s one potential problem. It must have been mentioned on this reflector and I missed it. Elecraft used U.S. Postal Service (USPS) to send the amp cross-country. I have never had a good experience with USPS’ handling of package deliveries, particularly heavy (expensive) ones. If you care about the shipper, have the discussion with Elecraft up front. I should have. Good luck all. Gary W2CS __ 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 k9...@live.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] Negative rail grounding
On 4/18/2018 11:28 AM, Jim Brown wrote: > NEC does not apply to low voltage DC systems. Oh? Check NEC Section 7 , specifically Article 720, which applies specifically to Low Voltage systems. (We do a LOT of 48V distribution system designs.) Philip M. Kane Esq / P.E. (K2ASP since 1952) VP - General Counsel & Engineering Manager CSI Telecommunications, Inc. - Consulting Engineers San Francisco, CA - Beaverton, OR __ 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] KPA1500 Caution
alapa...@w2cs.net writes: Elecraft used U.S. Postal Service (USPS) to send the amp cross-country. I have never had a good experience with USPS’ handling of package deliveries, particularly heavy (expensive) ones. I live rather rural, no mail delivery in our remote desert area. Get my mail and packages at a rural mail box cluster. Hard to get FedEx or UPS out here, so USPS is it. Can't say I've ever had a problem receiving packages with various radio gear (including my KX2), two expensive DJI Phantom drones (those came from China), etc. through USPS. If you have, it must be the local mail handlers, and there are recourses for that. Certainly hope you get your KPA1500 soon and in perfect shape and don't think USPS is the kiss of death. Don't loose any sleep over it (yet!). 73, Paul NA5N __ 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] KPA1500 Caution
Hi, My order online invoice for KPA1500 states shipping method: UPS. 73, RoyK6XK -Original Message- From: alapa...@w2cs.net Sent: Wednesday, April 18, 2018 5:17 PM To: elecraft Subject: [Elecraft] KPA1500 Caution I’m a day-2 KPA1500 patient waiter. I got the email 2 days ago and today it shipped. There’s one potential problem. It must have been mentioned on this reflector and I missed it. Elecraft used U.S. Postal Service (USPS) to send the amp cross-country. I have never had a good experience with USPS’ handling of package deliveries, particularly heavy (expensive) ones. If you care about the shipper, have the discussion with Elecraft up front. I should have. Good luck all. Gary W2CS __ 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] RESOLVED Fwd: KPA1500 Caution
What I’m about to relate is one of the many reasons why my loyalty to Elecraft product runs at 100%. Michelle (at Elecraft) was able to intercept my KPA1500 box before the USPS got it and send it instead via UPS. What service! While it still might pay to ask if you care about USPS being a choice, in my case at least all is now well. Sorry for the bandwidth. Again, a Day TWO order!!! 73 Gary W2CS Dartmouth, MA > Begin forwarded message: > > From: "alapa...@w2cs.net" > Subject: [Elecraft] KPA1500 Caution > Date: April 18, 2018 at 6:17:10 PM EDT > To: elecraft > > I’m a day-2 KPA1500 patient waiter. I got the email 2 days ago and today it > shipped. > > There’s one potential problem. It must have been mentioned on this reflector > and I missed it. Elecraft used U.S. Postal Service (USPS) to send the amp > cross-country. I have never had a good experience with USPS’ handling of > package deliveries, particularly heavy (expensive) ones. > > If you care about the shipper, have the discussion with Elecraft up front. I > should have. Good luck all. > > Gary W2CS > > > __ > 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 alapa...@w2cs.net __ 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] KPA1500 Caution
I’m a day-2 KPA1500 patient waiter. I got the email 2 days ago and today it shipped. There’s one potential problem. It must have been mentioned on this reflector and I missed it. Elecraft used U.S. Postal Service (USPS) to send the amp cross-country. I have never had a good experience with USPS’ handling of package deliveries, particularly heavy (expensive) ones. If you care about the shipper, have the discussion with Elecraft up front. I should have. Good luck all. Gary W2CS __ 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] Negative rail grounding
On 4/18/2018 1:33 PM, Josh Fiden wrote: SS30 is an SMPS so a different beast than the prior discussed linear supplies. It's possible that the DC return to chassis connection is needed for EMC compliance. That's providing a low impedance return path for noise generated by switch elements. Without the connection, noise will take an unwanted path and come out as common mode noise. In fact, the opposite is true. When V- is NOT bonded to shack ground, the power cable forms a transmission line, confining the field for noise current to a small region around the pair. But when V- IS bonded to shack ground, return current divides between the shack ground path and the V- (black) conductor. The fields no longer cancel, the noise current takes whatever path it chooses, and a magnetic loop is formed between V+ and shack ground. Common mode noise current can easily be blocked using ferrite chokes on the DC cable just was we do with coax. A frequent source of the noise is capacitive coupling from MOSFETs to chassis, sometimes via a heat sink. Yes. Interior circuit design and layout is critical to low RF noise. 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] Negative rail grounding
There's no safety requirement that DC return be connected to chassis. SS30 is an SMPS so a different beast than the prior discussed linear supplies. It's possible that the DC return to chassis connection is needed for EMC compliance. That's providing a low impedance return path for noise generated by switch elements. Without the connection, noise will take an unwanted path and come out as common mode noise. A frequent source of the noise is capacitive coupling from MOSFETs to chassis, sometimes via a heat sink. I would be hesitant to simply insulate the DC neg from chassis. One possibility would be to cut the copper around PCB mounting screws (carefully!), and put a cap between them so you maintain an AC connection but block the unwanted DC path. You want the capacitor value to be much greater than the parasitic capacitance. 73, Josh W6XU On 4/18/2018 11:10 AM, Michael Blake wrote: I though I would separate this from the other discussion. It seems that my newest Astron SS30 power supply does not allow for the negative post to be isolated from the chassis. The green wire can be disconnected from the chassis but the negative rail of the DC output can not be isolated from the chassis. The negative rail is firmly connected to the chassis via two of the circuit board mounting screws. Separation would only be possible by using insulating washers and nylon screws. This is not true in one of my older supplies. Has there been an NEC or UL change that requires that one side of the output of a DC supply be grounded? __ 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] K 3 Sub receive no audio
Is the SUB using the same antenna as the main. John KK9a JAY ki4txp wrote: Thanks to all for the suggestions. I have now discovered that I am RX fine on the Main. On the SUB all i get is a swish noise no audio. Thanks again in advance 73 Jay KI4TXP __ 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] K 3 Sub receive no audio
A "swish noise with no audio" sounds exactly like what my factory installed sub rx sounded like in diversity mode. Turned out the associated VFO cable was pluggined into the wrong port on the one of the vertical boards behind the front panel. There are two VFO sources (one for independent VFO, one for a second drop of the primary VFO). Check the wiring. On Wed, 18 Apr 2018, JAY wrote: Thanks to all for the suggestions. I have now discovered that I am RX fine on the Main. On the SUB all i get is a swish noise no audio. Thanks again in advance 73 Jay KI4TXP On Wed, Apr 18, 2018 at 11:40 AM, JAY wrote: I do not get any signals when I turn on the sub rx. I get main rx on both sides of headphones. It has to be a setting that I am missing. I do get a steady sound but no audio. Thanks in advance. -- 73 KI4TXP JAY -- 73 KI4TXP JAY __ 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 joberreu-elecr...@moselle.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] K 3 Sub receive no audio
Thanks to all for the suggestions. I have now discovered that I am RX fine on the Main. On the SUB all i get is a swish noise no audio. Thanks again in advance 73 Jay KI4TXP On Wed, Apr 18, 2018 at 11:40 AM, JAY wrote: > I do not get any signals when I turn on the sub rx. I get main rx on both > sides of headphones. It has to be a setting that I am missing. I do get a > steady sound but no audio. Thanks in advance. > > -- > 73 > > KI4TXP JAY > -- 73 KI4TXP JAY __ 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] Negative rail grounding
Jim, I am not sure why you suggested I check for paint under the mounting screws. IT IS bonded to the chassis and cannot be isolated. I did not believe that the NEC applied but I was not sure about UL. Michael Blake k9...@mac.com > On Apr 18, 2018, at 14:28, Jim Brown wrote: > >> On 4/18/2018 11:10 AM, Michael Blake wrote: >> It seems that my newest Astron SS30 power supply does not allow for the >> negative post to be isolated from the chassis. The green wire can be >> disconnected from the chassis but the negative rail of the DC output can not >> be isolated from the chassis. The negative rail is firmly connected to the >> chassis via two of the circuit board mounting screws. Separation would only >> be possible by using insulating washers and nylon screws. > > That's unfortunate, and a good reason to avoid that supply. It IS an > absolute requirement of virtually all Electrical Codes (LAW) in North America > that the Green Wire be bonded to the shielding enclosure (chassis). I > suggest that you check that paint is not insulating the mounting screws fro > the shielding enclosure. >> >> This is not true in one of my older supplies. Has there been an NEC or UL >> change that requires that one side of the output of a DC supply be grounded? > > NEC does not apply to low voltage DC systems. > > 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 k9...@mac.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] Negative rail grounding
On 4/18/2018 11:10 AM, Michael Blake wrote: It seems that my newest Astron SS30 power supply does not allow for the negative post to be isolated from the chassis. The green wire can be disconnected from the chassis but the negative rail of the DC output can not be isolated from the chassis. The negative rail is firmly connected to the chassis via two of the circuit board mounting screws. Separation would only be possible by using insulating washers and nylon screws. That's unfortunate, and a good reason to avoid that supply. It IS an absolute requirement of virtually all Electrical Codes (LAW) in North America that the Green Wire be bonded to the shielding enclosure (chassis). I suggest that you check that paint is not insulating the mounting screws fro the shielding enclosure. This is not true in one of my older supplies. Has there been an NEC or UL change that requires that one side of the output of a DC supply be grounded? NEC does not apply to low voltage DC systems. 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
[Elecraft] Negative rail grounding
I though I would separate this from the other discussion. It seems that my newest Astron SS30 power supply does not allow for the negative post to be isolated from the chassis. The green wire can be disconnected from the chassis but the negative rail of the DC output can not be isolated from the chassis. The negative rail is firmly connected to the chassis via two of the circuit board mounting screws. Separation would only be possible by using insulating washers and nylon screws. This is not true in one of my older supplies. Has there been an NEC or UL change that requires that one side of the output of a DC supply be grounded? Michael Blake k9...@mac.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
[Elecraft] K 3 Sub receive no audio
I do not get any signals when I turn on the sub rx. I get main rx on both sides of headphones. It has to be a setting that I am missing. I do get a steady sound but no audio. Thanks in advance. -- 73 KI4TXP JAY __ 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
