K2 keying mod
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I'd like to update my K2 (SN 336) with the keying mod to reduce CW
bandwidth. The doc from Elecraft specifies a PIN diode that is obsolete and no longer available (5082-3081). I'm not sure what specifications are important to spec a replacement part. Any suggestions for a suitable replacement, or maybe someone out there has the correct part that they could sell me? Thanks and regards, Mike M. KU4QO ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Mike,
Order the SMT1B - PIN diode on carrier board p/n E120014 from Elecraft and mount it as shown on page 60 of the latest K2 manual. Note that you also will need to have MCU firmware at 2.04. If yours is lower than that, also order FWK2MCIO. The current firmware is 2.04r, and if you are dealing with a K2 below SN 3000 and have not done the sidetone source change as indicated in the KPA100 or KIO2 instructions, you must add it to use 2.04r because the sidetone source is locked at U8-4. That is the only difference between 2.04P and 2.04r. The rest of the components on the Control Board can be mounted as indicated in the Keying Waveshape Mod documentation. If you do not have that document, send me an off-list email and I can send it to you. I have been installing that mod on all the K2s that I upgrade. 73, Don W3FPR On 11/3/2017 8:56 AM, Mike Maiorana wrote: > I'd like to update my K2 (SN 336) with the keying mod to reduce CW > bandwidth. The doc from Elecraft specifies a PIN diode that is obsolete and > no longer available (5082-3081). > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Hey Don,
Is it true that you can draw the entire K2 schematic from memory? I learn something every time I read one of your posts. Thanks a zillion for all the help you give out on here. We all owe you a beer or three. -- 73, Mike Cizek WØVTT -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Don Wilhelm Sent: Friday, November 03, 2017 08:40 To: Mike Maiorana; [hidden email] Subject: Re: [Elecraft] K2 keying mod Mike, Order the SMT1B - PIN diode on carrier board p/n E120014 from Elecraft and mount it as shown on page 60 of the latest K2 manual. Note that you also will need to have MCU firmware at 2.04. If yours is lower than that, also order FWK2MCIO. The current firmware is 2.04r, and if you are dealing with a K2 below SN 3000 and have not done the sidetone source change as indicated in the KPA100 or KIO2 instructions, you must add it to use 2.04r because the sidetone source is locked at U8-4. That is the only difference between 2.04P and 2.04r. The rest of the components on the Control Board can be mounted as indicated in the Keying Waveshape Mod documentation. If you do not have that document, send me an off-list email and I can send it to you. I have been installing that mod on all the K2s that I upgrade. 73, Don W3FPR On 11/3/2017 8:56 AM, Mike Maiorana wrote: > I'd like to update my K2 (SN 336) with the keying mod to reduce CW > bandwidth. The doc from Elecraft specifies a PIN diode that is obsolete and > no longer available (5082-3081). > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Mike,
Thank you for your compliments. No, I cannot draw the schematic from memory, but I am quite familiar with the schematics and manuals for the K2, K1, KX1 and XV series transverters. I keep printed copies of the schematics handy at my office computer and the workbench that I have to re-print every few months because they get ragged edges. 73, Don W3FPR On 11/3/2017 9:44 AM, Mike Cizek W0VTT wrote: > Hey Don, > > Is it true that you can draw the entire K2 schematic from memory? > > I learn something every time I read one of your posts. Thanks a zillion for > all the help you give out on here. We all owe you a beer or three. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Don Wilhelm
Don,
As always, thank you for that detailed information. I do have a set of 2.04r firmware to install as I go through my A-to-B mod list. Best regards, Mike M. KU4QO On Fri, Nov 3, 2017 at 9:39 AM, Don Wilhelm <[hidden email]> wrote: > Mike, > > Order the SMT1B - PIN diode on carrier board p/n E120014 from Elecraft and > mount it as shown on page 60 of the latest K2 manual. > Note that you also will need to have MCU firmware at 2.04. If yours is > lower than that, also order FWK2MCIO. > The current firmware is 2.04r, and if you are dealing with a K2 below SN > 3000 and have not done the sidetone source change as indicated in the > KPA100 or KIO2 instructions, you must add it to use 2.04r because the > sidetone source is locked at U8-4. That is the only difference between > 2.04P and 2.04r. > > The rest of the components on the Control Board can be mounted as > indicated in the Keying Waveshape Mod documentation. If you do not have > that document, send me an off-list email and I can send it to you. > > I have been installing that mod on all the K2s that I upgrade. > > 73, > Don W3FPR > > > On 11/3/2017 8:56 AM, Mike Maiorana wrote: > >> I'd like to update my K2 (SN 336) with the keying mod to reduce CW >> bandwidth. The doc from Elecraft specifies a PIN diode that is obsolete >> and >> no longer available (5082-3081). >> >> Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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