[Elecraft] How to test noise blanker

VR2BrettGraham vr2bg at harts.org.hk
Thu Jun 29 05:51:46 EDT 2006


KD1E added to another comment:

>>The NB was optimized to block out ignition noise from UPS trucks.
>>Proper testing requires you order more stuff from Elecraft so UPS will
>>return.
>
>Actually, it was quite tricky coming up with a circuit to block out the
>ignition noise from a diesel engine

I would hate to imagine what the running costs are of that petrol
cement lorry N3CSY blanked out - they probably have the most
dear product around!

I believe there was mention in the past that the K2's NB was
optimized to some extent on a VW Transporter (replace with
model name used in your market) of vintage I have forgotten.

The state of motor vehicle ignition systems in NA must have
deteriorated significantly in the past 20 years, as here in
maintenance-prevention-not-preventative-maintenance Asia it's
not much worse than back there back then & it's other noise
(like power) where a NB gets the most use.

Or presumably there are a lot of VW-based buggies or other
less quiet petrol internal combustion engine powered devices
to be encountered in the great NA outdoors nowadays.

Remember, there is nothing wrong with the NB - you just need
to have the right noise.  Perhaps it would be better to call it
something else, as NB does imply something of what it will do
based on what other rigs' NBs do (unlike AUX I/O ;^).

Then there would not need to for the ever repeating
defend-the-NB thread here, usually starting with somebody
wondering in a post if their recently completed NB works as it
doesn't seem to behave as they expected it to (read last
sentence of last paragraph again).

73, VR2BrettGraham



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