[Elecraft] K3S audio board for K3 upgrade?

[Joe Subich, W4TV]

On 3/21/2016 7:38 PM, Eric Swartz - WA6HHQ, Elecraft wrote:

> One thought for those using the 2.7 or 2.8 SSB filters. Try reducing
> the DSP bandwidth to 2.4 kHz or so, and shifting the center freq.
> down 100 Hz. Many other radios have a 2.4 kHz SSB filter, and while
> it does restrict the audio fidelity as compared to the 2.7/2.8 kHz
> filters, the reduction in the upper cutoff to 2.4 kHz reduces the
> amount of high frequency band noise and interference, which may
> account for what some construe as a 'smoother' sound.

Many "traditional" transceivers also have a 3 to 6 dB per octave roll-
off in audio frequency response above 800/1000/1500 Hz (depending on
the manufacturer) which limits the high frequency "crud".

While there are some who have a "religious" opposition to using RX EQ
in the K3/K3S, I've found that setting the 3200 Hz "band" to - 6dB (or
-10dB) greatly helps with the sound on SSB and setting both 2400 and
3200 to -16dB is useful in CW.

73,

   ... Joe, W4TV