Sniffing around with E- and H-field probes, the largest contributor I can
find are fast edges going over SPI lines on ribbon cable between
multi-tube carrier PCB... quite obvious up to and beyond 1.5 GHz. I can see
the digit fade activity on the spectrum analyzer... Noise for the first
half
Luckily he refunded my money... I really should give him bad feedback but
he sounds like a noob.
Bill
--
You received this message because you are subscribed to the Google Groups
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to
Oscillations and switching signals are not enough on their own to create
RFI. They have to be radiated.
Shielding is a common way to reduce emissions (and also to reduce
susceptibility to incoming interference). I always use twisted-pairs for my
power cabling, and when I have to use ribbon
Naaa, it means he screwed up. He only had the one item listed.
It means, he wants $399 plus shipping for it. Not $1.
So, you can agree to pay $399 or cancel the winning bid.
Michail Wilson
206-920-6312
-Original Message-
From: neonixie-l@googlegroups.com
My three B7971 clocks all produced RFI in the AM and SW radio bands, and I
kept my radios at least 5m away. They were based on the CT7001 clock chip,
so the MUX rate was about 2 KHZ. The RFI (and the acoustic singing from
the tubes) seemed to change with the digits displayed. I assumed that
I have several AM and FM radios and I have not experienced any noticeable
interference from the various nixie clocks. On the other hand, I have experi nc
d quite a lot from various LED lights and laptops. All of it is typically short
range (several feet/meters).
This article discusses a radio
It means that he wanted to list "quite a few" items and had to use low starting
prices. I guess the one in question didn't get bidded-up. The aggregate list
value meant that he chose to risk not starting high.
Or am I missing a point here?
John k
-Original Message-
From:
Sigh, Tempest. "We" used to service some Tempest spec sites.
Btw, you need a security clearance to be able to access/read the spec too :-))
And, some of our guys just would not keep the spares cabinet locked.
I agree that shielding/filtering the supply is not impossible, but is so much
harder
You can always build a little tempest facility around it. Like a small Faraday
cage.
Bill
--
You received this message because you are subscribed to the Google Groups
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to
Got this from the guy:
New message from: zhch-12 (7)
hi,so sorry ,one thing to note is that because of ebay's restrictions on new
sellers, the maximum price of the articles published can only be $200, This
month's quota is running out.and the real price is $399.
What the heck does that mean?
10 matches
Mail list logo
