[Elecraft] K3: Actual bandwidth of Inrad 500hz 8-pole filter?

[Scott Manthe]

This has some filter plots for various K3 filters:

http://www.nccc.cc/archived_meetings/pdf/K3%20Filters,%20Jan%202009.pdf

73,
Scott N9AA


On 7/26/15 3:28 PM, Joe Subich, W4TV wrote:
>
> http://www.elecraft.com/K3/K3_filter_plots.htm does not list the
> *INRAD* 500 Hz (or 1500 Hz) filter(s).  Those filters are only
> available directly from INRAD (http://www.inrad.net/home.php?cat=140)
> - items 727 and 728.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 2015-07-26 3:06 PM, Wayne Burdick wrote:
>> There are accurate filter bandwidth plots on our website for each 
>> filter.
>>
>> Wayne
>> N6KR
>>
>>
>> On Jul 26, 2015, at 12:01 PM, "Joe Subich, W4TV" <lists at subich.com> 
>> wrote:
>>
>>>
>>> Looking through the other rigs that use Inrad 8 pole filters in the
>>> 8 - 9 MHz range, those filters for which curves are shown have 6 dB
>>> bandwidths in the 580 - 595 Hz range.
>>>
>>> 73,
>>>
>>>    ... Joe, W4TV
>>>
>>>
>>> On 2015-07-26 1:21 PM, Dick via Elecraft wrote:
>>>> Would anyone know the actual bandwidth of the Inrad Model 728  
>>>> 500hz 8-pole
>>>> filter?  Such as, the 250hz 8-pole has an  actual bandwidth of 
>>>> 370hz, and
>>>> the 400hz 8-pole filter has an actual  bandwidth of 450hz. (no 
>>>> graph is
>>>> shown for the Model 728 like it is  for the others)
>>>>
>>>> Thanks & 73,
>>>>
>>>> Dick- K9OM