++++++++++++++++++ Date: Wed, 8 Aug 2001 05:43:18 -0600 From: "Rod Cerkoney, N0RC" Subject: Re: [Elecraft] K1 power plug question The part supplied by Elecraft is a Switchraft part, model # S760; Digikey Part #SC1052-ND. The Switchcraft part is of superior quality to plugs supplied by RS. The solder tabs are heavier duty metal, and the shell is larger--thus accepting larger wire. FWIW: I have standardized on this plug for my use. I have several 2ft pigtails made with this plug, and 18 gauge Red/Black power-cord, purchased from Cable-X. The other end of the pigtail is terminated with a Anderson Pwer Pole connector. All power sources in my shack are terminated with Anderson Power Poles as well. This makes a convenient, anything hooks to anything set up. 73, Rod N0RC Ft Collins, CO It is indeed 2.1 ID - ----- Original Message ----- From: "Brad Johnson" To: Sent: Wednesday, August 08, 2001 1:19 AM Subject: [Elecraft] K1 power plug question > Well, once again I dug a little deeper and hopefully, answered my own > question, and in the process can assist someone else. > > The K1 parts list identifies the dc power plug only as "2.1 mm male > connector." It appears that the dc power plug supplied with the K1 has an > I.D. of 2.1 mm and an O.D. of 5.5 mm. This particular plug is not typically ++++++++++++++++++++++++++ Date: Wed, 08 Aug 2001 12:58:06 -0500 From: Tom Hammond =?iso-8859-1?Q?N=D8SS?= Subject: Re: [Elecraft] K1 power plug question Brad, et al: >The K1 parts list identifies the dc power plug only as "2.1 mm male >connector." It appears that the dc power plug supplied with the K1 has an >I.D. of 2.1 mm and an O.D. of 5.5 mm. This particular plug is not typically >stocked in the RS stores according to the RS website, but can be ordered >online. IF this is the correct plug, the RS part number is 910-0902. Perhaps >someone has a appropriate Mouser or DigiKey part number for the plug in >question, should those routes be preferred .... Checking the Mouser (www.mouser.com) catalog, I find a bunch of available coaxial plugs which appear to fill the bill... some possibly better than others. The specs which you note above are correct, BUT don't forget the length as well. The plug supplied by Elecraft appears to be 9.5mm (0.374") long. In the Mouser catalog, DGS offers 2.1mm x 5.5mm plugs in several lengths to include 9.5mm, and in a couple different styles and colors as well. Relevant (Mouser) part #'s appear to be: 1710-2112 Std., gray $0.57 -3215 Rt. Angle, black 0.83 -3217 Black, w/relief 1.08 If, for some reason, you wish to have the barrel of your plug a bit longer, say 9.9mm (0.389"), they offer: 1710-2131 Std., black $0.65 Hope this helps. I tend to use Mouser because they charge NO handling, only actual shipping, and they generally ship same day UPS ground. I have NO interest whatsoever in Mouser Electronics or DGS. 73 - Tom Hammond N0SS ps For what it's worth, there are also 14mm long available, althoufh they're quite a bit longer than necessary, they DO work. +++++++++++++++++++++ Date: Sun, 16 Sep 2001 15:06:38 -0500 From: n4so at juno.com Subject: [Elecraft] Switchcraft S760/Power Plug 2.1mm Switchcraft part number S760 Power Plug for Elecraft K1 included in the kit is 2.1mm dia. and is superior to Chinese made/and cheaply made power plugs that I have seen. Digi-Key part number SC-1052-ND. Page 151 has various Switchcraft power plugs and jacks. The power plug mates with an SC-1049 panel jack. - --More expensive but worth it... Ken Brown-N4SO Mobile, AL EM50tk NorCal-20 at 5 watts/4 ele. yagi Keylite Kit keyer +++++++++++++++ ++++++++++++++++++ Date: Tue, 07 May 2002 14:55:39 -0500 To: Lloyd Lachow , elecraft at mailman.qth.net From: Tom Hammond =?iso-8859-1?Q?N=D8SS?= Subject: Re: [Elecraft] Barrel plug specs for K1 power Lloyd: >I'd appreciate some help in finding the plug to fit >the power input jack on my impending K1, and advice on >wiring it up. I'll probably be using a bench power >supply with binding posts, for the other end. Thanks! From the reflector, a while back: Rod Cerkoney, N0RC, wrote: >The plug is 5.0/2.1mm OD/ID respectively. RS has them, but I don't >have the P/N. In store packages have size marked on them. The part >Elecraft supplies is from Switchcraft and is available from Digikey >part number: SC-1052-ND (I think the Switchcraft item is of superior >quality). > >The Connector in the radio (probably Switchcraft) is Digikey item: >SC1155-ND > >Digikey online page for these items is: > > http://info.digikey.com/T013/V5/177.pdf More info: Switchcraft #S760, Mouser part #502-S-760 Technical specs: ID .080" (2.03mm), assume 2.1mm OD .218" (5.5mm) See NOTE below Barrel Length .375" (9.52mm) Note: Switchcraft does not list a 5.1mm (0.20") diameter barrel coaxial power connector. It appears that ALL of their coaxial pwr connectors are 5.5mm (0.218") in diameter. I used a caliper to confirm the outside diameter of the barrel of the plug I'd received from Elecraft. 0.218" (5.5mm) on the button. For more info on this Switchcraft connector, go to: http://www.switchcraft.com/ and search for "S760". The plug dimension specs are at the bottom of this page, and if you click on selection #2 (760/S760) from the list at the top of the page, you can download a single-page PDF which shows to detailed engineering drawing of the plug, with references which will match to the specs on the page noted above. I believe this to be the power plug which we are using on our K2s and K1s. They ARE better quality than the plugs available from R/S, if for no other reason that the fact that the center cunductor of the Switchcraft plugs is slightly recessed within the insulator, thus making it more difficult to accidently short the positive lead to ground. The apparent R/S equivalent (at least with regard to dimensions, NOT quality) is their 274-1569 (5.5 x 2.1 mm). The apparent DigiKey part #'s are: Plug SC-1052-ND (as Ron has stated) Socket SC-1153-ND (the SC-1155-ND is SMT) NOTE that the 1998 DigiKey catalog from which I got this info had the Switchcraft part #'s for the plug and jack SWITCHED. However the DigiKey web site (www.digikey.com) had everything listed correctly. Users are urged to RETAIN this information for the future when you will surely need it. And WILL eventually need it... almost guaranteed! Thanks Ron, Tom Hammond N0SS ++++++++++++++++++ To: elecraft at mailman.qth.net Date: Tue, 7 May 2002 16:45:12 -0500 From: n4so at juno.com Subject: [Elecraft] Digi-Key Power Plug connector pwrplug.txt Mates with DC power jack Switchcraft S760, 2.1mm male DC power connector Digi-Key part number SC1052-ND Superior to other power connectors which may short out or fail. Yes, it costs more, BUT. Ken Brown-N4SO Mobile, AL EM50tk Elecraft K-1 4 ele. monoband yagi N4SO at juno.com ++++++++++++++++++++