[Elecraft] K4 Questions

[Wayne Burdick]

Definitely.

Wayne


> On Jun 6, 2019, at 2:59 PM, Doug Turnbull <turnbull at net1.ie> wrote:
> 
> Would switching out the superhet front end allow a wider bandwidth for FT8
> in the event that narrower filters are used in the front end.
>             73 Doug EI2CN
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Wayne Burdick
> Sent: 06 June 2019 21:54
> To: n4cc at windstream.net
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K4 Questions
> 
> 
>> On Jun 6, 2019, at 2:28 PM, <n4cc at windstream.net> <n4cc at windstream.net>
> wrote:
>> 
>> 1.	I understand that the K4HD will have a selectable feature that would
>> allow it to use either the direct sampling or the superhet front end.   If
> I
>> had a K4HD, why would I ever want to switch from the better superhet front
>> end to SDR - assuming I already own all the filters?
> 
> a)  Direct-sampling passband is flatter than the flattest crystal filter,
> with no ripple or group delay issues. Better sound on SSB, ESSB, AM, and FM,
> and possibly lower error rate in some digital modes, DV, etc.
> 
> b)  Direct sampling provides a wider bandwidth looking into the DSP,
> allowing for some advanced noise reduction capabilities including new NR,
> frequency-offset noise cancellation, etc. These features will be evolving
> over time.
> 
> c)  Turning off the superhet module will allow RX/TX operation near and at
> the IF (8.215 MHz). 
> 
> d)  Current drain will be lower with the HDR module turned off.
> 
> 
> 
>> 2.	Will there be a "K4 mini"?  I know I could operate remotely from a
>> PC, etc. but would prefer the "real radio" feel with knobs, a plug in
>> paddle, etc. and having the panadapter screen in the mini would be a plus?
>> I use a K3 mini now but not with a P3.
> 
> Maybe. Someday. But I can't say for certain. Another possibility is a
> "K4/0", i.e. a K4 with only a front panel and host interface module, but in
> the same size chassis as a K4. Any K4, including a K4/0 or -mini, will be
> able to control another one.
> 
> 
> 
>> 3.	My primary station is built as a remote station in FL in partnership
>> with Paul-W9AC.  We use Verizon 4G LTE for internet and are limited to 30
> GB
>> of data per month (without upcharge).  How data intensive is the K4 with
> the
>> panadapter in remote operation versus the K3S -- assuming it would be
>> controlled with a K4 mini or another K4 to get the panadapter feature??
> 
> No data on this yet. But you should be able to turn off the panadapter
> stream if/when you don't need it. Good idea.
> 
> 73,
> Wayne
> N6KR
> 
> 
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