Don¡¯t expect miracles with the NB ! It works on some noise and some it just don¡¯t care! I would eliminate all noise in and around house first!
I run a Timewave dsp599 ( works on audio ) which makes the radio much better to listen to.
My R4C I don¡¯t have a NB in it the first IF is to narrow for stock NB to work but using the Timewave , lightning isnt to bad and I don¡¯t make any rf noise in house or if I do I can turn that light off Hihi
73s Byron AC9PA
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On Apr 11, 2021, at 11:20 AM, wb6ogd <garywinblad@...> wrote:
?The Drake blanker is very effective... Like Richard says it works great on ignition noise.
Back in the day it made the difference between being able to hear a station or not.
Now a days, there isn't much ignition noise anymore so it really doesn't do much.
73,
Gary
WB6OGD
On 4/11/2021 7:36 AM, Richard Knoppow wrote:
I can talk about the R4B. The blanker works fine on ignition noise, which was what it was mostly designed for but does nothing for the grinding line noise that is much more common. I tested it using a Tektronix pulse generator. It does work but is not like the blankers found in some more modern receivers. The idea of the blanker is to prevent pulse noise like ignition noise from causing the AVC to reduce sensitivity. It also does not affect the sort of noise a conventional noise limiter of the sort found in boatanchor receivers will take out but the usual series valve limiter does not work for CW or SSB. I think there are after market noise removers that work pretty well.
On 4/11/2021 5:09 AM, David Lipson via groups.io wrote:
Hi
I,ve been trying to use my r4a recently. The pulse noise has been strong, and the blanker does not seem to be helpful. IS the experience of others similar?
73s
David
N9pvf
