[Elecraft] KX3 - Initial I/Q Output Parametric Measurements

In the last two days we've seen a number of questions raised regarding the KX3's I/Q output and its frequency response characteristics. In an effort to provide some information that others may find helpful, this evening I made several measurements of my KX3's I/Q output (early 700 S/N) using my H/P

[Elecraft] MCU Load Failure w/FW 4.36 or 4.39

I've been running FW 4.25 for some time now, primarily because there wasn't any compelling reason for me to upgrade. However, this evening when I saw Wayne's announcement for 4.39 I thought I'd give it a try. Unfortunately, I ran into an unusual problem. I've installed FW dozens of times over t

Re: [Elecraft] LPPan vs. P3

One aspect of the LP Pan/PowerSDR-IF combination that hasn't been mentioned is that in addition to serving as a panadapter, PowerSDR-IF is a complete receiver, totally independent of any settings on the K3 itself other than the operating frequency. The LP Pan I/Q demodulator obtains its sample from

[Elecraft] 6 Meter Output From KRC2

I have a KRC2 that, among other things, I would like to use to switch between an HF antenna below 30 MHz and a 6 M antenna when the 50 MHz band is selected. My KRC2 microcontroller came with V1.5 from the factory. Because the KRC2 was originally designed with the 10 HF bands in mind, I'm finding t

Re: [Elecraft] K3 Loses RX Audio at BW of 2.8 kHz (Problem Resolved but Questions Remain)

PT Cc: Scott Prather; Elecraft Reflector Subject: Re: [Elecraft] K3 Loses RX Audio at BW of 2.8 kHz Bingo! I restored my last config (from 1/20) and problem is gone.. Now I am trying to noodle over what configuration item may have changed during the beta upgrade that caused it. At any rate, a

Re: [Elecraft] K3 Loses RX Audio at BW of 2.8 kHz

Scott N7NB -Original Message- From: Joe Planisky [mailto:jp...@jeffnet.org] Sent: Saturday, February 06, 2010 7:09 AM To: Scott Prather Cc: 'Elecraft Reflector' Subject: Re: [Elecraft] K3 Loses RX Audio at BW of 2.8 kHz Hi Scott, Just a shot in the dark: Have you checked your

[Elecraft] K3 Loses RX Audio at BW of 2.8 kHz

All: This evening when running FW 3.76 I'm seeing a problem with my K3 that I've never seen before. When the K3 is in the LSB, USB or AM mode, adjusting the bandwidth down to 2.8 kHz will result in total loss of audio, even though the S-meter continues to read incoming signal strength. I've tried

[Elecraft] KRX3: Poor Sensitivity on Aux Antenna Port

This evening I finished installation of the KRX3 that I ordered back in April, and I ran into a problem with poor sensitivity on the Aux port I thought others might be interested in. After I completed installation of the KRX3 and went through the requisite VCO calibration, filter setup, etc., I f

RE: [Elecraft] VLF/LF Converters

d the LO can be supplied by my local H/P frequency standard. Scott N7NB -Original Message- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Thursday, August 28, 2008 1:46 PM To: Scott Prather Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] VLF/LF Converters Scott, Right now, the K3 XVx R

RE: [Elecraft] VLF/LF Converters

Regarding the VLF converters, one question I have for the SW folks at Elecraft is whether they could add a transverter "band" to support these unique receive converter IF frequencies. For example, I have a VLF converter that I've used for years that was designed for a 4 MHz IF. I realize that I c

RE: [Elecraft] K3 BCB reception weak

Steve: The K3's PIN diode T/R switch displays quite a bit of attenuation in the broadcast band, especially below about 1 MHz (I've measured 18 dB attenuation at 500 kHz). The only solution I'm aware of is to install the KXV3. With the external antenna input provided on this interface (which bypas

RE: [Elecraft] K3 AM vs FM filter

Ron: I agree with you that, unlike a typical analog receiver and product detector demodulating either the upper or lower sideband of a full-carrier AM signal at zero-beat, I found the K3's audio to be exceptionally clean. So clean, in fact, it sounds like an analog synchronous detector even though

[Elecraft] K3/100 RF Feedback/Spurious Oscillation Verified Via RX Input

When I read about this report from Stewart last night (as well as the responses indicating that other had experienced a similar effect) I decided to set up the bench test to see if I could emulate the problem. I've since discovered that these reports are valid, the K3 PA will generate a severe spe

[Elecraft] KNB2 Performance

It has been my experience that the KNB2 is one of the least effective noise blankers that I've used on a current-production radio. At night, I have a high noise level produced by malfunctioning street lights (this has been true for the 10 years I've lived here), and the KNB2 is completely ineffect