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WHY NOT 700HZ FILTER FOR K3/K3S?

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IK4EWX

WHY NOT 700HZ FILTER FOR K3/K3S?

Why Elecraft doesnt produce a 700hz filter for cw ragchewing?
It doesnt need to be an 8pole Inrad, but can be a 5-6pole Elecraft, a 700hz
or a 600hz gaussian, even better.
It would be a very nice sounding cw filter for 15-40wpm chats on not too
disturbed bands.

--
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Vic Rosenthal

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

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Ted Edwards W3TB

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

There was a special run by INRAD of 700 Hz CW filters about 5 years ago— I
have one and use it often. Sold out quickly. Buon Natalie!

On Sun, Dec 23, 2018 at 06:56 Victor Rosenthal 4X6GP <[hidden email]>
wrote:

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Bob McGraw - K4TAX

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

In reply to this post by Vic Rosenthal

I find the 500 Hz 5 pole filter works very satisfactory for this purpose.

73

Bob, K4TAX

On 12/23/2018 6:54 AM, Victor Rosenthal 4X6GP wrote:

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Roger D Johnson

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

I can vary the selectivity from 2800 to 50 Hz with the width knob.

73, Roger

On 12/23/2018 10:08 AM, Bob McGraw K4TAX wrote:

> I find the 500 Hz 5 pole filter works very satisfactory for this purpose.
>
> 73
>
> Bob, K4TAX
>
> On 12/23/2018 6:54 AM, Victor Rosenthal 4X6GP wrote:
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IK4EWX

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

It is a better thing to have a roofing filter, i wouldnt like to use only the
dsp with the 2700 ssb filter.
I have the 500hz 5 pole filter (and the 200hz 6 pole), but I find that
sometime I have a nicer audio tone with a wider filtering.
1000hz is too wide for me, sure it is good with rtty, but for cw with our
noisy and crowded band is too much.
So I think that a 700 hz Bessel filter, or a better (wide at the base)
gaussian 600hz sure would have a better audio cw in reception.

--
Sent from: http://elecraft.365791.n2.nabble.com/
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donovanf

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

Several small productions runs 700 Hz crystal filters were manufactured
for the K3 several years ago. Unfortunately they're rarely offered
for sale on the used market.

73
Frank
W3LPL

----- Original Message -----

From: "IK4EWX" <[hidden email]>
To: [hidden email]
Sent: Sunday, December 23, 2018 5:47:55 PM
Subject: Re: [Elecraft] WHY NOT 700HZ FILTER FOR K3/K3S?

It is a better thing to have a roofing filter, i wouldnt like to use only the
dsp with the 2700 ssb filter.
I have the 500hz 5 pole filter (and the 200hz 6 pole), but I find that
sometime I have a nicer audio tone with a wider filtering.
1000hz is too wide for me, sure it is good with rtty, but for cw with our
noisy and crowded band is too much.
So I think that a 700 hz Bessel filter, or a better (wide at the base)
gaussian 600hz sure would have a better audio cw in reception.

--
Sent from: http://elecraft.365791.n2.nabble.com/
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Bob McGraw - K4TAX

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

In reply to this post by Roger D Johnson

Yes while true, however the DSP doesn't take the place of or perform
the function of a roofing filter.

73

Bob, K4TAX

On 12/23/2018 11:13 AM, Roger D Johnson wrote:
> I can vary the selectivity from 2800 to 50 Hz with the width knob.
>
> 73, Roger
>
>

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Clay Autery-2

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

In reply to this post by Ted Edwards W3TB

I have a matched set... very nice. Use it frequently.

Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Ted Edwards W3TB <[hidden email]> Date: 12/23/18 07:48 (GMT-06:00) To: Victor Rosenthal 4X6GP <[hidden email]> Cc: [hidden email] Subject: Re: [Elecraft] WHY NOT 700HZ FILTER FOR K3/K3S?
There was a special run by INRAD of 700 Hz CW filters about 5 years ago— I
have one and use it often. Sold out quickly. Buon Natalie!

On Sun, Dec 23, 2018 at 06:56 Victor Rosenthal 4X6GP <[hidden email]>
wrote:

--
73 de Ted Edwards, W3TB and GØPWW

and thinking about operating CW:
"Do today what others won't,
so you can do tomorrow what others can't."
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Jim Brown-10

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

In reply to this post by IK4EWX

On 12/23/2018 3:22 AM, IK4EWX wrote:
> Why Elecraft doesnt produce a 700hz filter for cw ragchewing?

Because IF filtering is done in DSP, so any desired bandwidth can be set
by the knobs on the front panel. The added crystal filter(s) are roofing
filters, and simply protect the DSP from strong signals outside the
passband.

73, Jim K9YC

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Dale Boresz

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

In reply to this post by IK4EWX

My most-used cw filter is the 1KHz filter with the width control set for
700-800 Hz. The audio is easy on the ears (my ears anyway), and still wide
enough for NR and APF to be effective.

73,

Dale - WA8SRA

On Sun, Dec 23, 2018 at 12:49 PM IK4EWX <[hidden email]> wrote:

> It is a better thing to have a roofing filter, i wouldnt like to use only
> the
> dsp with the 2700 ssb filter.
> I have the 500hz 5 pole filter (and the 200hz 6 pole), but I find that
> sometime I have a nicer audio tone with a wider filtering.
> 1000hz is too wide for me, sure it is good with rtty, but for cw with our
> noisy and crowded band is too much.
> So I think that a 700 hz Bessel filter, or a better (wide at the base)
> gaussian 600hz sure would have a better audio cw in reception.
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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>

Clay Autery-2

Re: WHY NOT 700HZ FILTER FOR K3/K3S?

In reply to this post by donovanf

Not a chance I'd ever let my set go... they will go with my radio when I go.

Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: [hidden email] Date: 12/23/18 12:01 (GMT-06:00) To: [hidden email] Subject: Re: [Elecraft] WHY NOT 700HZ FILTER FOR K3/K3S?
Several small productions runs 700 Hz crystal filters were manufactured
for the K3 several years ago. Unfortunately they're rarely offered
for sale on the used market.

73
Frank
W3LPL

----- Original Message -----

From: "IK4EWX" <[hidden email]>
To: [hidden email]
Sent: Sunday, December 23, 2018 5:47:55 PM
Subject: Re: [Elecraft] WHY NOT 700HZ FILTER FOR K3/K3S?

It is a better thing to have a roofing filter, i wouldnt like to use only the
dsp with the 2700 ssb filter.
I have the 500hz 5 pole filter (and the 200hz 6 pole), but I find that
sometime I have a nicer audio tone with a wider filtering.
1000hz is too wide for me, sure it is good with rtty, but for cw with our
noisy and crowded band is too much.
So I think that a 700 hz Bessel filter, or a better (wide at the base)
gaussian 600hz sure would have a better audio cw in reception.

--
Sent from: http://elecraft.365791.n2.nabble.com/
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