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Before completing my review, I thought I might fit in one more quick comparison–this time, comparing the Icom IC-7300 to my Elecraft KX3 and focusing on SSB and CW reception.
Recording notes and disclaimers
The Icom IC-7300 offers native digital audio recording, which means that it records both transmitted and received audio to an inserted SD card.
The Elecraft KX3 does not have a built-in recorder (indeed, most transceivers do not) thus I made in-line recordings using my Zoom H2N digital recorder.
I did no post-processing of the audio other than converting .wav files to .mp3.
Both receivers shared my large outdoor omni-directional horizontal delta loop antenna for each test.
The Elad ASA15 Antenna Splitter Amplifier
To keep the comparison on as equal footing as possible, the receivers shared the same antenna through my Elad ASA15 antenna splitter amplifier. Though the ASA15 has both 12dB amplification and –15dB attenuation, I employed neither.
The ASA15 allowed me to make the following recordings simultaneously.
In each case, I tried to set up both radios using the same filter widths, AGC settings, and (as much as possible), audio level. I didn’t engage a noise-reduction feature on either rig.
I also didn’t employ any type of audio equalization on either rig–still, you’ll note that one radio produces a more “flat” response than the other.
Please vote!
At the end of this post, I have an embedded a survey in which you can vote for the sample recordings you like best. Each recording is clearly labeled to denote that it’s either from “Radio A” or “Radio B” (chosen at random).
In the past, receiver shoot-outs in which I’ve provided sample audio for “blind” comparison––meaning, the listener does not know which audio sample is associated with which radio––have produced particularly positive feedback from Post readers.
I have a number of SDRs (software defined radios) in the shack at the moment, but I picked the Excalibur because it’s the closest in price ($900 US) to the IC-7300 ($1500) as compared to my Elad FDM-S2 ($520) or the TitanSDR Pro ($2500).
Recording notes and disclaimers
Both the WinRadio Excalibur and the Icom IC-7300 offer native digital audio recording (nice touch, Icom!). The Excalibur simply records the AF to a file on my PC’s hard drive, while the IC-7300 records the audio to an SD card which I can later transfer to my PC.
I’ve been using the Excalibur since 2012, so I’m very familiar with its recording feature. I was not, however, familiar with the IC-7300’s digital recorder, so prior to making recordings, I checked to make sure its recorded audio was a fair representation of its live audio. To my ear, the IC-7300 recorded audio was nearly identical to that of the live audio, so I used the 7300’s internal recorder rather than one of my external recorders.
Both receivers shared my large outdoor omni-directional horizontal delta loop antenna for each test.
The Elad ASA15 Antenna Splitter Amplifier
To keep the comparison on as equal footing as possible, the receivers shared the same antenna through my Elad ASA15 antenna splitter amplifier. Though the ASA15 has both 12dB amplification and –15dB attenuation, I employed neither.
The ASA15 allowed me to make the following recordings simultaneously.
In each case, I tried to set up both radios using the same filter widths, gain, AGC settings, and (as much as possible), audio level. I didn’t engage a noise-reduction feature on either rig.
Note: the only exception to the radios’ equal treatment was in the AM mode recordings, in which I used the WinRadio’s AM Sync (AMS) mode. Why? Frankly speaking, 99% of the time during which I use the Excalibur, I do employ its AMS mode as its AM mode often sounds “hot” and over-driven when band conditions are as noisy, as they were last night.
The IC-7300 does not have AM synchronous detection (AMS mode), but I felt it compared very favorably to the Excalibur in AMS mode. The IC-7300 would have easily beat the Excalibur in this test had I only used the Excalibur’s AM mode. In the end, as a shortwave listener, the goal is to compare the total capabilities of broadcast performance between the two receivers (thus using sync mode if available, to maximize broadcast listening performance).
Please vote!
At the end of this post, I have an embedded a survey in which you can vote for the sample recordings you like best. Each recording is clearly labeled to denote that it’s either from “Radio A” or “Radio B” (I had my wife draw names from a hat to determine which radio would be labeled as A or B).
Since there are quite a few recordings, I’d suggest jotting down your notes separately before completing the survey.
The following recordings were made on the 40 meter ham radio band yesterday evening. Both radios have the same filter width: 250 Hz in CW, 3 kHz in SSB.
Note that the following mediumwave recordings were made during the morning hours (grayline). The strong station is the closest AM broadcaster to my home; it’s not a blow-torch “Class A” type station, merely the closest local broadcaster.
In the “weak” sample, I tuned to 630 kHz, where multiple broadcasters could be heard on frequency––but one was dominant.
The Elecraft KX3 does not have a built-in recorder (indeed, most transceivers do not) thus I made in-line recordings using my Zoom H2N digital recorder.
