[Elecraft] Noise Blanker

[Ron D'Eau Claire]

Yep, that's why I also wrote in the message you quoted from: 

"Such trucks often make a lot of hash from various electric motors, etc. -
just the sort of thing the NB can't touch. "

My NB works FB, but is by far does the most spectacular job on
high-amplitude short-duration pulses like ignition noise and cheap lamp
dimmers. That QRN just disappears when the NB is turned on even though it
may be blanketing all signals without the NB. 

Most other QRN sources helped very little or not at all by the NB in my
experience. That would include most of the QRN coming from non-ignition
sources in large vehicles. 

Have you had success in dealing with those sorts of QRN using the NB, Jim?
I know there're some mods folks have made to the NB but I haven't tried
them. Other that cheap lamp dimmers that appear from time to time, I live in
a very quiet QTH, fortunately! 

Ron AC7AC

-----Original Message-----

In a message dated 10/1/06 6:58:53 PM Eastern Daylight Time,
rondec at easystreet.com writes:




Ignition noise from large trucks??? All of the ones I've seen are diesel -
no spark ignition at all! 




Many of not most auto and truck diesel engines made in recent years use
electronic injection control. Instead of the familiar distribution-type
injection pump with individual fuel lines to the injectors, there's a single
high pressure fuel rail feeding all the injectors. The injectors are
electronically controlled - which can be a source of RFI.

There's also a ton of other electronics on most modern vehicles, too.

73 de Jim, N2EY