The Icom IC-7000 I recently purchased is quite old and they’re known for having a bit of high frequency ‘hiss’ in the audio output.

I doesn’t matter while using the built-in speaker, however it gets annoying when using high quality headphones. There is a fix, but it’s complicated and involves extracting a major PCB from the radio.

I had some random two-way speaker filter in a drawer so decided to give it a go at reworking it, to become a 700Hz lowpass filter (I’m primarily a CW operator).

It turned out really nice, even peaks a bit before rolling off.

And the ‘hiss’ from the radio? Gone! 👍🏼😃

#hamradio #hamr #icom #icom7000 #siglent #electronicsengineering #signalsaturday

Ahh, the joy of listening to a 1750Hz tone, hoping it’ll reach the repeater ☺️

It worked just fine, had a nice QSO afterwards 👍🏼🙂

Oh and there’s a new little radio in the mail - I’m making this a permanent setup 👍🏼 Stay tuned 👌🏻🙂

#hamradio #radio #antenna #rfengineer #electronics #icom7000 #icomradio #icom