[Elecraft] going back in time with the K1
The K1's main tuning rate is partially determined by the choice of tuning range, with the wider range obviously requiring a faster tuning rate for complete traversal. The K1 manual indicates that RF board capacitor C2 determines the main tuning range, with C2 = 120 pF yielding about 150 kHz of range and C2 = 68 pF yielding about 80 kHz of range. Both capacitors were supplied with the kit. There was an official Elecraft mod for the K1 to eliminate the variation in the main tuning rate from one end to the other of its range, but I skipped that mod because the variation didn't bother me. RIT/XIT tuning range and rate is determined by the R4/R3/R5 voltage divider on the front panel board. Increasing equally the values of fixed resistors R4 and R5 will reduce both incremental tuning range and rate. (Obviously, it's easier to replace the fixed resistors than the pot.) A value of R4 = R5 = 47K will result in an RIT/XIT tuning range of about 1 kHz, with resulting slower tuning. On the other hand, this range isn't enough for DX split-frequency operating, so DXers may prefer some value between 47K and the stock but touchy 10K. 73, Paul W8TM __ 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] going back in time with the K1
I still enjoy my K1, too. A favorite qso was going to a nearby park in Delaware, stuck a wire in the back, tuned and qso'd with an op in France. I always liked the K1 ad quoting a compliment by a Heathkit chief engineer, Mike Elliot w8kkr, preserved here: https://www.qrpproject.de/UK/elecraft_k1.htm 73, Mike ab3ap On 8/21/22 11:09 PM, brianpepperdine brianpepperdine wrote: > Well.. anyhow last week I had extra time on my hands so pulled out some of the neglected rigs. [...] Found the K1 was a good rig.. made decent contacts. [...] Brian VE3HI __ 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] going back in time with the K1
I have had a K1 here for some time now and it did not get a lot of attention. I was not all that happy with how fast it tuned. Well.. anyhow last week I had extra time on my hands so pulled out some of the neglected rigs. Found the K1 was a good rig.. made decent contacts. But I did find I needed to exercise 'safe cracker' fingers for the tuning... once I did that there was not a big issue. The other thing I did was find one of the few wire coat hangers in our house (most hangers were nicer ones with padding, or wood etc.as to not crease etc the clothing)... cut the hanger as per instructions for DIY bail stand that have been on the Elecraft mail listwell I did it best I could via the written guide lines (no photo available).. and 'VIOLA' and Bob is your uncle as they say --- I had a nice bail stand mounted on the K1 so I could see the display and knobs and not have to stare at it from desk surface level...HI. Brian VE3HI __ 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
