Re: [Elecraft] KX3 And Alexloop?
I am using it with my KX3 in Kona, Hawaii. Works well but not quite as well as the MFJ 17 foot vertical. Easy to tune but I tune the Alexloop and then finish with the antenna tuner in the Kx3. I cannot get the SWR down by using the Alexloop cap alone. Bob K7VO On Sat, Apr 25, 2015 at 1:27 PM, Frank Krozel kg9hfr...@gmail.com wrote: Fred, Pretty interesting calculator - I have not seen that before. It is interesting how much better an antenna I can have on 40 meters if I go from 9’ to 12’. Hmmm. Anyone tried a slightly larger loop for an Alexloop? Frank KG9H On Apr 25, 2015, at 2:58 PM, Fred Jensen k6...@foothill.net wrote: I don't have a KX3 but don't know how that would matter. I do have an AlexLoop, replaced a BuddiePole [about the same price], and it works super with my K2. KAT2 has to be bypassed because the loop *must* be exactly resonant, but I really like the loop. It's on the edge of too small on 40 and the tuning is quite touchy, but 10 MHz and up it's a snap. http://www.66pacific.com/calculators/small_tx_loop_calc.aspx has a calculator for octagonal mag loops. You might need to adjust the size of the coupling loop if you make the resonant loop bigger. BP weighed in at 17 lbs, AL is 1.6 lbs. Don't know exactly how many dB advantage that is, but it's a lot if I'm hiking uphill. AL sets up in about 5 min. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org On 4/25/2015 7:33 AM, Frank Krozel wrote: Curious if anyone has been experimenting with a KX3 and an Alexloop. I have been using mine for about 6 months - love it. Don’t use the tuner in the KX3 though as the manual says... Wondering if anyone has made the loop larger to cover 60 meters? Frank KG9H __ 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 kg9hfr...@gmail.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 Message delivered to k7vora...@gmail.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 no rx audio
SCORRRE!! Thanks Don :) In the end, I reflowed the control and front panel boards. I wasn't able to see any bad solder joints (I am using a magnifier), but apparently there was one somewhere Powered it up and got noise :) :) :) Kevin W9KH On 4/26/2015 7:39 AM, Don Wilhelm wrote: Kevin, Did you install the jumper wires at the R18 or R19 locations on the Control Board? If you instead installed Control Board J1 and J2 in anticipation of adding the KAF2 or KDSP2, you need to add a wire jumper between J1 pin 1 and J2 pin 1 and another between J1 pin 2 and J2 pin 2 before you can hear any audio from the RF board. If that is not the problem, take a look at the connector soldering on the Control Board and the Front Panel Board. Are all pins soldered - especially pin 1 on the Front Panel. Examine those boards carefully for solder bridges. Follow the audio path on the schematic for the Control Board starting on the right side of the schematic at the PD1 and PD2 points, through the MUTE transistors Q6 and Q7, then onto the Front Panel AF1, AF2 and AF3 signal lines. You may have to remove the Front Panel metalwork to gain access to those signal paths as they move to the front panel board. Touching a screwdriver to the AF1, AF2 and AF3 lines should result in a bit of hum pickup. 73, Don W3FPR On 4/26/2015 6:51 AM, Kevin Hulina wrote: I am going through the tests of my newly built K2 and I'm getting no receive audio. I am able to get side tone, and if I give the radio a signal it shows up on the S meter, but I don't get any receive audio. I have done the PLL reference oscillator, vco, bfo and agc tests. All those seemed ok per the troubleshooting. I have tried other bands and am not able to get the white (atmospheric) noise on any band. Any thoughts? __ 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] Amp power per $$ spreadsheet download
To really do this right, you would need to add factors for things like IMD, QSK, fan noise, duty cycle, ease of tuning, etc. Cost per watt is only one factor. Of course everyone would have their own personal concerns, so you could add a place in the spreadsheet where the user could weight the various factors appropriately. A CW operator doesn't care about IMD, a digital guy is very interested in duty cycle, a DXer wants instant turn-on and tuneup, etc. Vic 4X6GP/K2VCO On Apr 27, 2015, at 12:34 AM, Jim Brown j...@audiosystemsgroup.com wrote: On Sat,4/25/2015 7:35 PM, Phil Wheeler wrote: Good job, Nick. I didn't realize my AL-811H was so cost effective. Sure is a royal PITA to use, though. I'll give it away to someone local who will use it -- no way I will deal with shipping the beast. I modified the spreadsheet a bit and re-sorted it. First, since we here in the US are permitted only 1,500W, I set max power for those amps with higher power ratings to that value. Second, just as Nick has included his used Alpha 99, I added my used Ten Tec Titan 425s. k9yc.com/PwrAmpdB.png There are many features and properties of power amps that go far beyond pure dB per dollar. some examples: The ACOM 1010 is a reasonably compact competitor to the KPA500, but it doesn't cover 6M. I bought one used from K6SRZ (to have another amp for CQP), who bought a KPA500 just to get 6M. Also, my occupied bandwidth tests show that the KPA500 is a bit cleaner than that ACOM 1010. And the 1010 is a single-voltage amp. It must be rewired to change it. The KPA500 can be switched by removing, rotating, and reinserting the fuse block built into the power plug. The ACOM 1000 does cover 6M. Both it and the 1010 have manual antenna tuners built in. Some of these amplifiers have built-in tuners, some of those tuners are automatic or have memories. Some of these amps are much better built than others. My Ten Tec Titans use high quality vacuum relays with logic to prevent hot-switching, as do the Alphas. The Ameritron amps I've seen use much cheaper open-frame relays, so their switching is much slower. My Titans are quite clean -- P3 measurements of both the KPA500 and the Titan look exactly like the K3 at the drive level required for rated power. But the Titans, like the lower cost ACOMs, are manual everything. 73, Jim K9YC __ 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 k2vco@gmail.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 Message delivered to arch...@mail-archive.com
