[Elecraft] [K2] Filters attenuation

[Mike Harris]

G'day,

The filters on K2 #1400 (fully updated):

Mode: CW
AGC: OFF
ATT: ON
Signal source: K3
Frequency: 18120kHz
Pitch Freq: 650Hz

Measured using Spectrogram ref level for audio peak -90dB.  The 
sound card in my PC isn't particularly good and this low level 
eliminates displayed audio harmonics.

Filter:
1000Hz -90 (ref)
700Hz -90
400Hz -92
200Hz - 94

FWIW.

Regards,

Mike VP8NO


----- Original Message ----- 
From: "Curt" <rhulett1 at comcast.net>
To: <elecraft at mailman.qth.net>
Sent: Thursday, November 04, 2010 10:37 PM
Subject: Re: [Elecraft] [K2] Filters attenuation


> Yes, mine attenuates but haven't bothered to measure it. 
> Strangely, the 700
> Hz seems worse than the narrower filters.
>
> Curt KB5JO
>
>>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?