[Elecraft] Noise Blanker

Sun Dec 22 20:41:04 2002

There is a test that originates with Elecraft that consists of touching
and scratching the transistor with a metallic screwdriver. It is the
transistor right in front of the noise blanker, I believe it is the
post-mixer amplifier. I had exactly the same problem as you and
discovered eventually that it actually did supress the noise generated
in this way. 

There should be more info on this in the archives of the Elecraft
reflector under 'Noise blanker'

73 Sverre LA3ZA
www.qsl.net/la3za

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Rick Wheeler
> Sent: 18. desember 2002 03:02
> To: [email protected]
> Subject: [Elecraft] Noise Blanker
> 
> 
> How can one tell if the Noise Blanker is working OK? I live 
> in a relatively quiet (RF that is) area with an occasional 
> electric fence or household generated noise. But no matter 
> what I do (Lo Thr, Hi Thr, nb1, nb2, or off) I can not detect 
> an inkling of difference or attenuation of man made noise. I 
> can generate noise with a hand-held drill or garbage disposal 
> and no difference is detected with the noise blanker on or off. 
> 
> I am familiar with the types of noise (at least the types 
> listed in the Noise Blanker manual) the Noise Blanker is 
> supposed to suppress. Is there any other common device I can 
> use to "test" my Noise Blanker?
> 
> Rick
> K4LX
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