[Elecraft] Computer interface problem with KX3/KXPA100

A guy at the radio club is trying to get N1MM working and when he switches on the KXPA100 the computer serial port fails. We have confirmed all the cables will work independently ie. The KX3 responds when connected to computer and the KX3 controls the PA. But, as soon as the PA is switched on the p

Re: [Elecraft] Computer interface problem with KX3/KXPA100

Further info... We have upgraded the KX3 to the latest revision and checked the KXPA100 which is current to the latest software. The computer is connected to the PC port on the KXPA100. -- View this message in context: http://elecraft.365791.n2.nabble.com/Computer-interface-problem-with-KX3-KX

[Elecraft] KAT500 RF tap for SDR Pure Signal

As well as using my K3 to drive my KPA500/KAT500 I am also using a Apache Labs Anan-10. There is a means of improving the linearity of the SDR transmitter using “Pure Signal” This is achieved by sampling the xmit signal and making appropriate corrections via the computer. The xmit signal is samp

[Elecraft] K3 won't boot up unless POWER button held down

If I switch my power supply on then hit the POWER button 8 green lights come on but the screen is blank. If I hold the K3 POWER button down while I apply power when I let the K3 POWER button go the radio works OK?? What's the fix? Reset the rig? Peter VK3IJ -- View this message in context: ht

[Elecraft] VK9MT transmit audio distortion.

It was disappointing to hear some of the SSB signals from VK9MT, especially on 20 metres late Wednesday 2/4 , the transmit audio especially on that occasion was weak and distorted. I had similar bad Tx audio reports when I took my K3 to Norfolk Island VK3NT which was never completely resolved, may

[Elecraft] K3 overheating smell after an hour or so.

I know this is like asking how long is a piece of string but like they say, if you don't ask I recently replaced the volume control in my rig and since then if the rig has been running for an hour or so I notice the smell of an over-heated component when I come into the room. The front of the rig

Re: [Elecraft] K3 overheating smell after an hour or so.

The pot was damaged in transit returning from VK9NT and was replaced with an Elecraft supplied part. As I said in the original post everything is working fine, that's whats strange, replacing the pot may be coincidental. Temperatures last night ... ambient 20c, FP 35c, PA 33c. I put a blob of heats

Re: [Elecraft] K3 overheating smell after an hour or so.

Thanks for the reply Bill. I remeasured the current. KRX3 on 1.82A off 1.52A so if the extra current is consistent with the KRX3 on and off with your measurement then I've got an extra 400mA sneaking off somewhere? 73, Peter VK3IJ -- View this message in context: http://elecraft.365791.n2.na

[Elecraft] Software to graph antenna SWR

Some time ago I had this program that you could use to sweep the antenna and produce a printout of the SWR among other utilities for the K3. I have googled but cannot locate it anybody remember what it was called? It was a windows program. 73, Peter VK3IJ -- View this message in context: htt

Re: [Elecraft] Software to graph antenna SWR

Jackpot Rick... Thanks Christmas Greetings from Down Under Peter -- View this message in context: http://elecraft.365791.n2.nabble.com/Software-to-graph-antenna-SWR-tp7581779p7581782.html Sent from the Elecraft mailing list archive at Nabble.com. __

[Elecraft] Adapter to use KXUSB with the KPA500

I have just completed the firmware upgrade on the KAT500 and found it a breeze with the supplied KXUSB cable. It got me wondering why nobody has come up with an adapter (so it could be used with the KPA500) by mounting a 3.5mm stereo socket in the back of the 9 pin serial connector and wiring the a

Re: [Elecraft] Adapter to use KXUSB with the KPA500

More like this .. -- View this message in context: http://elecraft.365791.n2.nabble.com/Adapter-to-use-KXUSB-with-the-KPA500-tp7570125p7570128.html Sent from the Elecraft mailing list archive at Nabble.com. _

[Elecraft] K3 transmitter gain calibration fails due high SWR

I decided to run through the calibration of my K3 after it came back from the VK9NT Dxpo. I find I can’t complete the transmit gain calibration as the SWR is to high on some bands. 1.8 to 10.1 are fine, the rest are as follows 14.1 is 1.5:1, 18.1 1.8:1, 21.1 2.7:1, 24.9 2.2:1, 28.4 2.4:1, 50.1 1.3:

Re: [Elecraft] K3 transmitter gain calibration fails due high SWR

Murphy strikes again! I changed the cable and used a 50 ohm load and all good, looks like the cable was duff!! Cheers Peter 3IJ -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-transmitter-gain-calibration-fails-due-high-SWR-tp7574132p7574141.html Sent from the Elecra