[Elecraft] K3s Receive EQ

[Joe Subich, W4TV]

Parametric EQs are much less flexible than a graphical.
When it comes to graphical, the RX EQ built into the K3
is much better suited to the job at hand than most of
the small 6/7/8 band consumer products that generally
have "bands" up to 20 or 40 KHz that are wasted for
our purposes.

The K3 RX EQ maintains separate settings for SSB and CW.
I generally set CW to max cut for 50/100 and -6/10/12
for 1600/2400/3200 (my pitch is ~500 Hz).  SSB is set to
max cut at 50/100, flat at 200/400/800, +2/4 at 1600/2400
and -8 at 3200 (to roll off a hit of the hiss).

Those settings are not as "hard" as some would suggest
for TX EQ but seem to help.  For phone one could push
the 1600/2400 boost a bit but too much boost will do
more harm that good.

73,

    ... Joe, W4TV

On 6/26/2023 9:17 AM, Dave New, N8SBE wrote:
> Here's a receive equalizer:
> 
> https://bhi-ltd.com/products/noise-cancellation-products/parapro-eq20-audio-dsp-range/1-parapro-eq20-dsp.html
> 
> Gigaparts and DX Engineering are two US dealers for this UK-based company.
> 
> 73,
> -- Dave, N8SBE
> 
> On 2023-06-26 09:13, Dave New, N8SBE wrote:
>> My apologies.  The equalizers linked to below are for TRANSMIT, not 
>> receive.
>>
>> That's what I get for not reading thoroughly before hitting the 'send' 
>> button.
>>
>> 73,
>> -- Dave, N8SBE
>>
>> On 2023-06-26 09:10, Dave New, N8SBE wrote:
>>> Richard,
>>>
>>> While reading your inquiry below, I was reminded of this:
>>>
>>> https://w2ihy.com/product-category/equalizers/
>>>
>>> I've never used one, but I've seen their booth at many prior Dayton 
>>> Hamventions, so I guess they've been in business for a while, is 
>>> saying a lot for many ham-related business these days.
>>>
>>> Hope this helps.
>>>
>>> 73,
>>> -- Dave, N8SBE
>>>
>>> On 2023-06-26 02:05, Richard wrote:
>>>> I love my K3s, warts and all, but I want a way to tailor incoming 
>>>> audio for better readability in special cases. Yes, I know about the 
>>>> built-in function, but that's hardly comfortable for quick, 
>>>> on-the-fly adjustments.
>>>>
>>>> Can you recommend/suggest an outboard equalizer, ideally 8 bands, 
>>>> that can be used to tune the headphone audio only?
>>>>
>>>> 1. This unit would be entirely external to the K3s, so its output 
>>>> level would have to be sufficient to drive headphones.
>>>>
>>>> 2. This unit would ideally be 9" by 9" maximum and 8" by 5" minimum, 
>>>> dictated by the available placement space in my station. There’s 
>>>> lots of wiggle room here.
>>>>
>>>> 3. 12 volts DC is available to power it.
>>>>
>>>> 4. An in/out (inline/bypassed) switch is essential.
>>>>
>>>> Links to look at would be great.
>>>>
>>>> Fingers crossed … VISA paid up and ready to rock and roll.
>>>>
>>>> Cheers
>>>>
>>>> Richard Kunc
>>>> W4KBX