[arm-allstar] Interesting info on the new hamvoip lowpass filter

[Kevin Custer]

David,

As you may know, the URI's LP filter starts at 4kHz and is wide enough 
to fully benefit from your new filter and its increased cut-off 
frequency.  Thankfully, the TKR's are about as wide as you'd care to get 
on the MIC input, and I'm sure your users hear a difference between the 
old and new filters.  Some radio adapters, like mine, don't 
automatically include any low-pass filtering.  I recommend adding it, 
where necessary, like on a unprotected FM modulator.  Thank you for 
confirming the set-up.

Kevin W3KKC


On 6/30/2018 10:24 PM, David McGough wrote:
> Hi Kevin,
>
> I'm running simpleusb on all my deployed systems, at this point. All
> are RPi3B hardware and the latest HamVoIP firmware.
>
> I retired my last "custom" ACID embedded PC about a year ago. I was
> running usbradio on all those boxes.
>
> Currently, I'm using mic-audio input and discriminator audio output on the
> TKR's, all interfaced with DMK URI adapters.
>
> 73, David KB4FXC