Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Wayne Burdick 
Typical loss of the 5- and 6-pole 200-Hz filters is about the same. I believe 
we do have enough DSP-based gain compensation for all filter types, but I'll 
ask our techs to verify this. 

The noise figure of the radio is established ahead of the crystal filters, so 
moderate loss in the filters is not significant from a performance standpoint. 
In fact the sensitivity and dynamic range of the radio are typically maximized 
when this filter is used.

Wayne
N6KR


On Apr 15, 2016, at 4:40 AM, brian  wrote:

> The plots have a disclaimer that one can't compare the passband attenuation 
> for the filters.
> 
> Some of us have noticed that with the old 200 Hz 5 pole filters the amount of 
> gain available to compensate for it was not enough.  I observed that here by 
> comparing SPECTROGRAM peak outputs per filter.
> 
> Presumably the 6 pole 200 Hz filter will have a bit more attenuation.
> 
> How does the passband loss of the new/old 200 Hz filters compare?
> 
> 73 de Brian/K3KO
> On 4/15/2016 2:17 AM, Wayne Burdick wrote:
>> Some of you may recall that we discontinued our 5-pole, 200-Hz filter last 
>> year. Our replacement for this filter has cleared all of our stringent test 
>> hurdles and is now available on our order page.
>> 
>> The new filter (KFL3C-200) has six poles rather than five, significantly 
>> improving skirt selectivity. And at the center, the passband is 200 Hz at 6 
>> dB down -- ideal for CW and narrowband data operation in high-QRM or QRN 
>> situations. (Our 5-pole filter was already a favorite of 160 meter CW 
>> contest veterans. The KFL3C-200 takes it up another notch. Maybe two.)
>> 
>> Plots for all of our filters, including an overlay comparing the KFL3A-250 
>> (INRAD 8-pole) to the new KFL3C-200, can be found at:
>> 
>>   http://www.elecraft.com/K3/K3_filter_plots.htm
>> 
>> Next week, when we're all recuperating from the Visalia DX convention, we'll 
>> provide a link to a plot showing the 5-pole vs. 6-pole filter passband. The 
>> improvement in skirt selectivity is quite pronounced.
>> 
>> This filter can be installed in a K3, K3S, or the sub receiver. To order, 
>> see:
>> 
>>   http://www.elecraft.com/elecraft_prod_list.htm#k3filters
>> 
>> 73,
>> 
>> Wayne, N6KR
>> Eric, WA6HHQ
>> 
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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Wayne Burdick 
The 6-pole filters have an offset (like the 5-pole). The offset is clearly 
marked on the filter and can be entered into the filter configuration page 
using K3 Utility. This has no effect on performance.

73,
Wayne
N6KR


On Apr 15, 2016, at 4:52 AM, Lou Voerman W2ROW  wrote:

> 
> I have one quick question about the 6 pole filter. Will it have an offset
> like the 5 pole filters or will the offset be zero like the 8 pole filters?
> 
> Thanks,
> Lou  W2ROW



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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Joe Subich, W4TV 


On 4/15/2016 7:52 AM, Lou Voerman W2ROW wrote:


I have one quick question about the 6 pole filter. Will it have an offset
like the 5 pole filters or will the offset be zero like the 8 pole filters?


Wayne indicated that they will but that matching is not critical when
used with the new synthesizers because the new synthesizers maintain
much tighter frequency tracking from band to band.

73,

   ... Joe, W4TV
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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Joe Subich, W4TV 


On 4/15/2016 5:33 AM, Petr, OK1RP/M0SIS wrote:
>

Is is possible to see also the comparison plot for new KFL3C-200 vs
old 5-poles/200Hz please?


Wayne promised the comparison plot after they returned from Visalia
(starts today) and have a chance to recover.

73,

  ... Joe, W4TV


On 4/15/2016 5:33 AM, Petr, OK1RP/M0SIS wrote:

Hi Wayne,

excellent! It will be helpful to all who wanted the old 5-poles/200Hz
obsolete option...

Is is possible to see also the comparison plot for new KFL3C-200 vs old
5-poles/200Hz please?

Many thanks,
73 - Petr, OK1RP



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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Lou Voerman W2ROW 

I have one quick question about the 6 pole filter. Will it have an offset
like the 5 pole filters or will the offset be zero like the 8 pole filters?

Thanks,
Lou  W2ROW



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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread brian 
The plots have a disclaimer that one can't compare the passband 
attenuation for the filters.


Some of us have noticed that with the old 200 Hz 5 pole filters the 
amount of gain available to compensate for it was not enough.  I 
observed that here by comparing SPECTROGRAM peak outputs per filter.


Presumably the 6 pole 200 Hz filter will have a bit more attenuation.

How does the passband loss of the new/old 200 Hz filters compare?

73 de Brian/K3KO
On 4/15/2016 2:17 AM, Wayne Burdick wrote:

Some of you may recall that we discontinued our 5-pole, 200-Hz filter last 
year. Our replacement for this filter has cleared all of our stringent test 
hurdles and is now available on our order page.

The new filter (KFL3C-200) has six poles rather than five, significantly 
improving skirt selectivity. And at the center, the passband is 200 Hz at 6 dB 
down -- ideal for CW and narrowband data operation in high-QRM or QRN 
situations. (Our 5-pole filter was already a favorite of 160 meter CW contest 
veterans. The KFL3C-200 takes it up another notch. Maybe two.)

Plots for all of our filters, including an overlay comparing the KFL3A-250 
(INRAD 8-pole) to the new KFL3C-200, can be found at:

   http://www.elecraft.com/K3/K3_filter_plots.htm

Next week, when we're all recuperating from the Visalia DX convention, we'll 
provide a link to a plot showing the 5-pole vs. 6-pole filter passband. The 
improvement in skirt selectivity is quite pronounced.

This filter can be installed in a K3, K3S, or the sub receiver. To order, see:

   http://www.elecraft.com/elecraft_prod_list.htm#k3filters

73,

Wayne, N6KR
Eric, WA6HHQ

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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Doug Turnbull 
Wayne and Elecrafters,
   You people are wonderful!!Your company is the best.As to
anyone bringing out a 7300 or super duper PC enclosed rig those same
companies will never ever provide the same level of service, communications
and on going development of existing products.   On these points Elecraft is
unique.   Then for my money you make the best products as well.

   Last night two K-Pods were ordered.   Now it looks like I will be
ordering six pole 200 Hz filters.   "Elecraft the company that keeps on
improving".

 73 Doug EI2CN





-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: 15 April 2016 02:17
To: Elecraft Reflector; elecr...@yahoogroups.com;
elecraft...@yahoogroups.com
Subject: [Elecraft] New from Elecraft: High-Performance 200-Hz,6-pole
Crystal Filter

Some of you may recall that we discontinued our 5-pole, 200-Hz filter last
year. Our replacement for this filter has cleared all of our stringent test
hurdles and is now available on our order page.

The new filter (KFL3C-200) has six poles rather than five, significantly
improving skirt selectivity. And at the center, the passband is 200 Hz at 6
dB down -- ideal for CW and narrowband data operation in high-QRM or QRN
situations. (Our 5-pole filter was already a favorite of 160 meter CW
contest veterans. The KFL3C-200 takes it up another notch. Maybe two.)

Plots for all of our filters, including an overlay comparing the KFL3A-250
(INRAD 8-pole) to the new KFL3C-200, can be found at:

  http://www.elecraft.com/K3/K3_filter_plots.htm

Next week, when we're all recuperating from the Visalia DX convention, we'll
provide a link to a plot showing the 5-pole vs. 6-pole filter passband. The
improvement in skirt selectivity is quite pronounced.

This filter can be installed in a K3, K3S, or the sub receiver. To order,
see:

  http://www.elecraft.com/elecraft_prod_list.htm#k3filters

73,

Wayne, N6KR
Eric, WA6HHQ

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Re: [Elecraft] New from Elecraft: High-Performance 200-Hz, 6-pole Crystal Filter

2016-04-15 Thread Petr, OK1RP/M0SIS 
Hi Wayne,

excellent! It will be helpful to all who wanted the old 5-poles/200Hz
obsolete option...

Is is possible to see also the comparison plot for new KFL3C-200 vs old
5-poles/200Hz please?

Many thanks,
73 - Petr, OK1RP



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