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Thursday, 7 May 2015

Whats going on here then - Part II

Well,

Following my musings about the really pants audio bandwidth from the Yaesu SCU-17 back here:

http://g0mgx.blogspot.co.uk/2015/05/whats-going-on-here-then.html

I've found an old external USB soundblaster soundcard thingamabob and hooked it up to my PC with the audio in and out directly to the PKT jack on the FT-DX5000 (the same connector the SCU-17 uses for audio to and from the radio).

Here's the comparison between the two:


So the old battered USB soundcard has a completely flat audio response, the SCU-17 is totally pants. I am rather horrified at the frequency response from this expensive Yaesu unit - I don't think it's even fit for purpose!

What  load of Dingos Kidneys.

Local conditions.

1 comment:

  1. This explains why I constantly have to chase the TX gain control on JT-65 and PSK-31. Quite frankly, I am tiring of jumping out of my chair at the computer desk and running over to the rig when the ALC is active. Thanks for running this test, I was looking int trying this experiment myself. I found a sweep test and the VU in the digital domain on my PC shows a constant level for the sweep.

    73 KE8DAF

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