[Elecraft] K3 in SS Phone

[Ed Muns]

If there were a 1.5kHz filter available, I might consider it.  I'll be
talking with INRAD about it.  You can see what 1.5kHz is like by moving the
DSP down to 1.5kHz, or even lower.  You just won't have the crystal filter
to keep nearby strong signals out of the DSP.

I think the 1.8kHz filter will be great for some time, until the entire
world converts over to K3s with 1.8kHz filters.  Then, you might need the
advantage of 1.5kHz!

In either case, though, the intelligible audio (the part you want to hear),
is essentially identical between the 2.8 and 1.8, or even 1.5, bandwidths
with the correct IF shift.

I hope my post doesn't result in a disruptive run on 1.8kHz filters at
Elecraft with a commensurate dearth of 2.1's in their stock (and, INRAD's)!


73,
Ed - W0YK

> -----Original Message-----
> From: David Ferrington, M0XDF [mailto:M0XDF at Alphadene.co.uk] 
> Sent: Monday, 19 November, 2007 11:21
> To: w0yk at msn.com; Elecraft Reflector
> Subject: Re: [Elecraft] K3 in SS Phone
> 
> 
> Sorry, that should have been a choice between 1.5 & 1.8 ...
> 
> On 19/11/07 19:19, "David Ferrington, M0XDF" 
> <M0XDF at Alphadene.co.uk> sent:
> 
> > Ed, I'm waiting for my K3 and I'm a phone man at present 
> (working on 
> > my Morse).
> > I have a 2.8kHz and 400Hz on order. Reading your post, 
> maybe I should 
> > consider either a 1.8 or a 2.1 kHz filter too.
> > Given the option, which would choose?
> > 
> > Anyone else want to chip in too please.
> > 
> > Kind of decision I couldn't make back in May.
> > 
> > On 19/11/07 18:50, "Ed Muns" <w0yk at msn.com> sent:
> >> On receive, I used the 1.8kHz crystal filter with the same DSP 
> >> bandwidth, although signals were quite intelligible down to 1.2kHz 
> >> and at 1.5kHz there wasn't much degradation from 1.8kHz.  
> As yet, the 
> >> K3 filter center
> 
> --
> Trust in Allah, but tie your camel. -Arabic saying
> 
> 
>