Re: [Elecraft] Who's your favorite Elecraft Elmer?
I totally agree, Don W3FPR is awesome. His knowledge of Elecraft equipment is superb. Spence W7CSW On Wed, Mar 13, 2019, 11:49 AM rboutell wrote: > I agree that Don W3FPR has been an incredible elmer here for many years. I > just wanted to also commend Tom Hammond N0SS (SK) for many earlier years of > beta testing, helpful tips, and answering questions on the reflector. Here > is a link to his preserved website. The soldering tutorial is invaluable. > http://www.mmccs.com/mmarc/n0ss/ > 73, Russ W9RB > > > > - > 73, Russ - W9RB > -- > 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 > __ 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
Re: [Elecraft] K2: Can't get frequency counter to work on TP2
Don, You are a genius! Thanks your suggestion worked. I replaced Q9/Q10 with spare 2Ns and the counter started working again. Thank you! 73, Carroll --- W7CSW On 7/27/06, Don Wilhelm <[EMAIL PROTECTED]> wrote: Carroll, Unless you are using someone else's email, it is neat to know that there is another Wilhelm in the K2 family - I started with SN 20 and it is still going strong. If your RF Probe is anywhere near correct, it would seem that you have plenty of RF signal at TP2, so the problem must be in the counter itself. In the long past, there were problems with the gain of the 2N5179 transistors Q9 and Q10 on the control board - we thought that problem had been squashed, but perhaps it has reared its ugly head again. As a side note, I had purchased some stock 2N5179 transistors, (Fairchild manufacture), and found that they do not work well in the counter input circuit either, so that circuit is evidently sensitive to the transistor type and one 2N5179 is not necessarily like another for that application. If you have some 2Ns around your workbench, try replacing the 2N5179s with 2Ns. The counter high frequency limit may be reduced a bit, but if it is only used internally in the K2, the 40 MHz limit is not required, the highest frequency needed is less than 25 MHz. Contact [EMAIL PROTECTED] and I am certain you can have replacement transistors on their way to you. Just a side note - in your measurements of RF Voltage at Q24, it would seem that you crossed the gate and drain voltages. Check the lead orientation on the K2 schematic key and let us know if there was no typo. If you are truly getting RF Voltage on the drain, Q24 may be the problem (but then the K2 would have no transmit output in that case) 73, Don W3FPR > -Original Message- > > I finished construction of my K2 (serial #5400) last month and all was > working well. At the time of construction all of the filter > alignment went > well. It has been lots of fun... I'm selling my Yaesu. :-) > > Since then I decided to calibrate the VFO on my K2 to get the frequency > better aligned. I don't have an accurate frequency generator so followed > the instructions in the manual and used WWV as my source. That all went > fine but when I went into Cal Fil and wanted to make a change to > one of the > filters got an 'info 230' message. I searched the list and found that was > related to the microprocessor not seeing the BFO frequency during a CAL > FIL. I verified that the frequency probe works by doing a CAL > FCTR with the > probe on TP1. When I move it to TP2 it always shows 0.00. > When I first > aligned it last month it worked but not now. > > So... I checked the following... I verified that Q24 is getting turned on > via V ALC when CAL FCTR is enabled. I see 7.26V DC when V ALC is on, zero > otherwise. > > Used my RF probe to find the following RMS voltages for Q24. > > V ALC On > Q24 drain5.99 V > Q24 source 2.02 V > Q24 gate 0 V > > V ALC off > Q24 drain 9 mv > Q24 source 15 mV > Q24 gate 0 V > > > It looks like the FET is turning on and off according to V ALC. I used my > scope to look at TP2 and can see a nicely formed wave form at around 4Mhz, > But can't detect it with the internal frequency counter and probe. So to > verify the probe and counter works I used the frequency probe to verify > 04913.34 MHz on pin 6 of U11 but it shows 0.00 when moved back to TP2 > Really confusing... > > Nothing jumps out at me. Its been years since I did any serious > troubleshooting. :-) Anybody have any ideas about what I can do? > > 73, > > Carroll (W7CSW) > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.394 / Virus Database: 268.10.4/401 - Release Date: 7/26/2006 > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2: Can't get frequency counter to work on TP2
Hi, I finished construction of my K2 (serial #5400) last month and all was working well. At the time of construction all of the filter alignment went well. It has been lots of fun... I'm selling my Yaesu. :-) Since then I decided to calibrate the VFO on my K2 to get the frequency better aligned. I don't have an accurate frequency generator so followed the instructions in the manual and used WWV as my source. That all went fine but when I went into Cal Fil and wanted to make a change to one of the filters got an 'info 230' message. I searched the list and found that was related to the microprocessor not seeing the BFO frequency during a CAL FIL. I verified that the frequency probe works by doing a CAL FCTR with the probe on TP1. When I move it to TP2 it always shows 0.00. When I first aligned it last month it worked but not now. So... I checked the following... I verified that Q24 is getting turned on via V ALC when CAL FCTR is enabled. I see 7.26V DC when V ALC is on, zero otherwise. Used my RF probe to find the following RMS voltages for Q24. V ALC On Q24 drain5.99 V Q24 source 2.02 V Q24 gate 0 V V ALC off Q24 drain 9 mv Q24 source 15 mV Q24 gate 0 V It looks like the FET is turning on and off according to V ALC. I used my scope to look at TP2 and can see a nicely formed wave form at around 4Mhz, But can't detect it with the internal frequency counter and probe. So to verify the probe and counter works I used the frequency probe to verify 04913.34 MHz on pin 6 of U11 but it shows 0.00 when moved back to TP2 Really confusing... Nothing jumps out at me. Its been years since I did any serious troubleshooting. :-) Anybody have any ideas about what I can do? 73, Carroll (W7CSW) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KX1 with 3080 board
All, FYI, I just finished upgrading my KX1 to a four band radio! It is now capable of 20m, 30m, 40m, and 80m. Assembly of the new module for 30 and 80 meters was straightforward and well worth the effort. Ron produced an excellent instruction manual that greatly simplfied the process. Many thanks to Wayne and Eric for allowing me to be one of the field testers for the new module. I'll be in Folsom CA on a business trip this week and will be on the air in the evenings near the QRP frequencies on 80m and 40m. Give me a shout! 73, Spence W7CSW FYI, I'm not affiliated with Elecraft other than owning a KX1 and a K2 and I LOVE THEIR PRODUCTS! I recommend the upgrade to anybody wanting more than three bands on the KX1. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Solder?
Thanks Stuart, After using the solder from Circuit Specialists for awhile on some test parts, I decided to trash it and just ordered some Kester 285. I'm confident I won't be disappointed. Thank you to all on the list for giving me good advice on this issue. 73, Spence W7CSW Original Message Follows From: "Stuart Rohre" <[EMAIL PROTECTED]> To: "Spence Wilhelm" <[EMAIL PROTECTED]>, Subject: Re: [Elecraft] Solder? Date: Mon, 6 Mar 2006 20:25:49 -0600 Solder is a very subjective thing. The thing to do with any solder unfamiliar to you is use it on some cables, components, connectors and evaluate the quality of joints it makes with your soldering tools, skill, etc. You can see if it takes more or less heat than old solder you are familiar with. You can see if it makes shiny, well wetted joints. You can see if it has left over flux residue in excess to a other clean solders. Make sure the formulation is suited to the heat range tip you have on your soldering iron. Trying it out on real world components and cable is the best way to find out if it flows well, and makes a good joint. Check the joints you make after a month for any signs of corrosion as a further test. Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Solder?
Just wondering about solder quality... Getting ready to build my K2 and want to make sure I have the right solder for the job. The elecraft site lists several brands/types. This week I stopped into Circuit Specialists in Mesa AZ and bought some solder. When I asked if they had any Kester solder they sold me this stuff. description RH60 Solder 1lb Spool, .031'' Diam, 60/40 (Sn%/Pb%) (RH60-1) Here is quality solder manufactured to the highest standards at a tremendous price. Circuit Specialists is a direct importer of this product and our large purchasing power enables us to offer this product at great savings. Manufactured with pure tin from Malaysia, and lead ingots from Australia. This solder has obtained prestigious Japanese Industry Standard (JIS) certification. It surpasses all levels defined in JIS and MIL standards for solderability, non-corrosiveness and conductivity. Melting points are 362°-365°F for the 63/37 and 365°-383°F for the 60/40. http://www.circuitspecialists.com/prod.itml/icOid/6259 -- Anybody have opinions/experience with the solder from Circuit Specialists? Would it be a good choice for the K2? It appears to solder well and is quite clean. Some of the older kester that I have seems to have a lot more flux than this stuff. Thoughts? 73, Spence W7CSW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Its a K2 Birthday!
All, My wife just gave me an awesome present for my birthday! K2 #5400! Can't wait to get started. 73, Spence W7CSW ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
