[Elecraft] K1: KAT1 -- cannot reach 5.0W output when adjusting R1 after calibrating power
Has anyone run into this problem when finishing up their KAT1 ATU? I was unable to find similar descriptions here. I built the RF probe in order to calibrate power with the KAT1 and have verified that the probe matches the schematic described in the K1 manual. Following the steps in the KAT1 manual, I set the ATU menu entry to CLP (calibrate power) and then exit the menu, set output power to 5.0 watts, set the K1 to use its lowest band (40m in my case), and check that R1 and R2 are set to 60% of their travel (about 1 o'clock). RF probe tip taps the center conductor of my 50 ohm dummy load, and the negative is clipped to the dummy load's chassis. After entering tune mode, I'm able to reduce power with WPM - (it starts out reading about 24 VDC) until I reach about 14.0 VDC on my DMM as described in the manual. [The problem:] The power out display on the K1 is now showing about 1.0. Adjusting R1 even all the way to its max will only display 3.8 at the point where R1 is maxed out. I'm unable to reach 5.0. If I then exit tune mode and check my power out setting in the OUT menu setting, it's down around 1.0, plus or minus a few tenths. Has anyone else experienced anything similar? I've re-read everything but can't seem to find a missing link. Thanks very much and 73, Mark / KB3OKS ___ 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] K1-4 KAT1: No voltage during SWR bridge adjustment of C9
Hello everyone, I'm currently assembling a KAT1 for use with my already-completed K1-4 (which I'd previously been using with an external tuner), and I'm having some trouble with the final step of the SWR bridge adjustment of trimmer capacitor C9. I did verify the previous steps of setting power output to 5.0 watts, attaching a suitable dummy load (same QRP dummy load I used when aligning the K1), setting both variable resistors to 60% of their travel, setting the tuner menu options to 'QLS', then entering tune mode and measuring voltage between TP1 and the ground jumper. [The problem:] But I'm getting 0.0 VDC across TP1 and ground. I did remove the KAT1 board and triple check all solder joints, as well as checking for continuity through my toroid windings. I also checked to make sure that power was reaching the KAT1 board by measuring about 5.5 VDC across C17 ... plus the fact that the tuner is 'recognized' by the K1 and all of its menu functions check out as normal. Does anyone have any tips on something else that I might check, or could it be that I've actually got a bad trimmer capacitor? I was unable to find any similar descriptions here. Thanks for your time, everyone. I absolutely love my K1 and can't wait to have it be even more portable with its new ATU. Cheers and 73, Mark, KB3OKS [EMAIL PROTECTED] ___ 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] Re: K1-4 -- No 30m band during initial tests
You're absolutely right -- I clearly didn't read that step correctly. I'm all sorted out now and go bravely onward! Thanks Paul, as well as to Karl (NM7N). 73, Mark (KB3OKS) On Dec 13, 2007 4:21 AM, Paul Barlow [EMAIL PROTECTED] wrote: Mark, have you set up the bands in firmware? The K1 doesn't simply know which bands are which, you have to tell it. The procedure is described in Band Assignment on p39 of the K1 manual. 73, Paul M0CDP From: Mark Lampert (KB3OKS) [EMAIL PROTECTED] Subject: [Elecraft] K1-4 -- No 30m band during initial tests To: elecraft@mailman.qth.net elecraft@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=ISO-8859-1 Hello all, I'm now a bit further along with my K1-4 build, and I just installed the VFO toroid (L1) on the RF board, fired the radio up and adjusted the winds to match the desired range. Shortly after that I was switching through the four bands as instructed, and I noticed that my radio is showing the following four bands: 40m, 20m, 17m, 15m ... **no 30m, and both 17 and 15!** (specifically, it displayed 7 MHz, 14 MHz, 18 MHz, 21 MHz). ___ 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] K1-4 -- No 30m band during initial tests
Hello all, I'm now a bit further along with my K1-4 build, and I just installed the VFO toroid (L1) on the RF board, fired the radio up and adjusted the winds to match the desired range. Shortly after that I was switching through the four bands as instructed, and I noticed that my radio is showing the following four bands: 40m, 20m, 17m, 15m ... **no 30m, and both 17 and 15!** (specifically, it displayed 7 MHz, 14 MHz, 18 MHz, 21 MHz). The first thing I did was re-check the crystals on my filter board very carefully with the K1-4 filter board manual. All are correct, in their correct respective spots, grounded, and I made the right crystal selection for 80kHz tuning. I then checked resistance again across the IC (U1). Everything looked good, though a couple of values were just barely higher than their recommended range: UI pin 8, UI pin 9 == 450 ohms (should be 360 -- 440 ohms) UI pin 9, UI pin 18 == 455 ohms (should be 360 -- 440 ohms) 1) Has anyone else experienced this problem of a missing 30m band while having both 17 and 15m present? 2) Does any of the above described info on my filter board sound suspect, or is there something else I should check? Thanks for your help, and 73, Mark (KB3OKS) ___ 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] Fwd: The results of your email commands
Well that's good news, then. I guess I assumed that '100' implied that resistance should read significantly higher than 100 ohms, though not approaching infinite/open circuit. In this case, I go bravely on! Thanks for taking the time to respond, Don, as well as to Mike, AB3AP. Mark, KB3OKS On Nov 26, 2007 7:30 PM, Don Wilhelm [EMAIL PROTECTED] wrote: Mark, If you had infinite readings on those that you marked 'XX', then they too are OK. Note the '' symbol before the number - it means 'greater than', and infinity is greater than 100k ohms. The readings listed have to cover all meters and circumstances. An ohmmeter on a high resistance scale may respond to just your fingers across the probes, so it would be counterproductive to write a reading of 'infinity' in the manual - while '100k' will cover most all meter situations while still revealing a short somewhere. 73, Don W3FPR Mark Lampert (KB3OKS) wrote: I've just finished constructing my K1-4 filter board, and I'm failing three of the resistance checks which are all reading infinite resistance on my DMM: OK -- P1 pin 1, P1 pin 2 XX -- P1 pin 3, P1 pin 4 OK -- P2 pin 2, P2 pin 4 XX -- P3 pin 1, P3 pin 3 XX -- P3 pin 8, P3 pin 6 ... all others are OK, including all tests across U1. Meter looks ok and is reading 0.1 Ohms when probes are touched together. Thanks very much for your time, ___ 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] Re: The results of your email commands
Hello all, I've just finished constructing my K1-4 filter board, and I'm failing three of the resistance checks which are all reading infinite resistance on my DMM: OK -- P1 pin 1, P1 pin 2 XX -- P1 pin 3, P1 pin 4 OK -- P2 pin 2, P2 pin 4 XX -- P3 pin 1, P3 pin 3 XX -- P3 pin 8, P3 pin 6 ... all others are OK, including all tests across U1. Meter looks ok and is reading 0.1 Ohms when probes are touched together. Thanks very much for your time, 73, Mark, KB3OKS [EMAIL PROTECTED] ___ 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] K1-4 -- filter board resistance checks trouble
Hello all, I've just finished constructing my K1-4 filter board, and I'm failing three of the resistance checks which are all reading infinite resistance on my DMM: OK -- P1 pin 1, P1 pin 2 XX -- P1 pin 3, P1 pin 4 OK -- P2 pin 2, P2 pin 4 XX -- P3 pin 1, P3 pin 3 XX -- P3 pin 8, P3 pin 6 ... all others are OK, including all tests across U1. Meter looks ok and is reading 0.1 Ohms when probes are touched together. Thanks very much for your time, 73, Mark, KB3OKS ___ 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
