K1 Tuning Range Quandary
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Good Evening All K1-4 Owners,
Construction of the K1 itself starts tomorrow evening after work! When I got my K1, I opted for the 4-band radio as primary, and I purchased the two-band module extra. For my four-band I chose: 40-30-20-15. I have 80 & 17 for the two band module. It is starting to become decision time for me, and I am in a quandary. Do I choose 80 or 150 KHz as my tuning range? I know the manual says that if you are building a four-band radio (Which I am), you should choose the 80 KHz tuning range. However, I am wondering how much coverage/bandwidth I am losing/missing out on if I do choose 80 KHz. With the 10-turn potentiometer, it means approximately 8 or 15 Khz per revolution of the knob. I'd like to poll all K1 owners out there and see WHAT you chose and, more importantly, WHY. I'd also like to know HOW you feel about the decision since you have had a chance to use your rig. If Eric or Wayne is reading this post, I'd really like to hear your thoughts as well. The last thing I want to do is go back in and change the bandwidth once it is built. Those thru-hole connections are tough to desolder! I thank you all in advance for your input. 73, David A. Dietrich KC9EHQ __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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It's only a matter of what you like, David. I built it for 150K bandspread,
and thought the tuning was way too fast for me. Most of my operating is near the QRP and FISTS frequencies and in the first 10 khz of 40, 20 and 15. On 30 I never go below 10.100 and I never go above 10.120. So I give up nothing and I gain smoother, slower tuning. If that isn't your operating style, pick the option that is. It is a very simple matter to change it later if you don't like it, so pick one based on what YOU are looking for, try it for awhile, then try the other if you are not satisfied. It's just not a big deal. There is no "decision time" with Elecraft products as long as you plan on keeping your soldering iron. Eric KE6US -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of David Dietrich Sent: Wednesday, June 29, 2005 7:54 PM To: [hidden email] Subject: [Elecraft] K1 Tuning Range Quandary Good Evening All K1-4 Owners, Construction of the K1 itself starts tomorrow evening after work! When I got my K1, I opted for the 4-band radio as primary, and I purchased the two-band module extra. For my four-band I chose: 40-30-20-15. I have 80 & 17 for the two band module. It is starting to become decision time for me, and I am in a quandary. Do I choose 80 or 150 KHz as my tuning range? I know the manual says that if you are building a four-band radio (Which I am), you should choose the 80 KHz tuning range. However, I am wondering how much coverage/bandwidth I am losing/missing out on if I do choose 80 KHz. With the 10-turn potentiometer, it means approximately 8 or 15 Khz per revolution of the knob. I'd like to poll all K1 owners out there and see WHAT you chose and, more importantly, WHY. I'd also like to know HOW you feel about the decision since you have had a chance to use your rig. If Eric or Wayne is reading this post, I'd really like to hear your thoughts as well. The last thing I want to do is go back in and change the bandwidth once it is built. Those thru-hole connections are tough to desolder! I thank you all in advance for your input. 73, David A. Dietrich KC9EHQ __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 mailing list Post to: [hidden email] 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 |
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In reply to this post by David Dietrich
On Jun 29, 2005, at 7:54 PM, David Dietrich wrote: > > It is starting to become decision time for me, and I am in a quandary. > Do I choose 80 or 150 KHz > as my tuning range? David, I can't speak for others, but I can explain the reasoning I used when I wrote the manual. First, 99% of CW activity occurs in the first 80 kHz of all bands covered by the K1. Second, covering a smaller range results in finer tuning resolution. When we first designed the K1 there was a reasonable amount of activity from 7100-7150 and 21100-21150. This is the main reason we offered a wider tuning-range option. Activity in these segments is now fairly sparse, with the exception of some gatherings near 7145 that I've heard about, so for the average builder I'd recommend 80 kHz. 73, Wayne N6KR --- http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] 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: K1 Tuning Range Quandary
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In reply to this post by David Dietrich
David,
Go with 80 kHz. I went with 150 and I think I am going to change it. 150 Khz makes tuning just a bit skittish. I can live with it; but when I have some time, I think I am going to change it. 73 de Larry W2LJ _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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