[Elecraft] [K2] Filters attenuation

[w2bvh]

  Petr,

I measured mine at 500 Hz a few years ago but never wrote down the 
number. I do remember being surprised at how much it was.  I use a wider 
filter most of the time and only go to the narrowest when there is 
substantial qrm in the passband; for just the reason you mention.

73,
Lenny W2BVH
K2 sn 1520


On 11/4/2010 4:27 PM, Petr Ourednik wrote:
> Dave,
>
> yes I am confirming>  it is the attenuation which I am talking about...
> When I am decreasing BW from 1.5k to 700Hz there is not noticeable att
> (which means it's aprox. less then 3dB) but by going to 400Hz or even to
> 200Hz I hear big att which can be like You said 8dB or so.
>
> Anybody else has similar experiences pls?
>
> 73 - Petr, OK1RP
>
> On Thu, 04 Nov 2010 13:12:46 -0500, "dave"<ho13dave at gmail.com>  said:
>> I dunno about the loss you are seeing but I've measured about 8 dB of
>> loss in my K2 at 200 Hz vs 1 kHz BW. That does strike me a quite a bit
>> of loss. I just don't use the narrow filters often. I know of at least
>> one other K2 that has similar loss. Anyone else?
>>
>>
>> 73 de dave
>> ab9ca/4
>>
>>
>>
>>
>>
>> On 11/4/10 11:48 AM, ok1rp wrote:
>>> Hi,
>>>
>>> I would like to ask for help. My K2 #4800 works fine but I realized the
>>> narrower filters have attenuation. I pre-set FL1>200Hz, FL2>400Hz and
>>> FL3>700Hz but with FL1 I recognised too much attenuation which degrading the
>>> reception of weaks sigs. Is there something which I am doing wrong please?
>>>
>>> 73 - Petr, OK1RP
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