Other than brightness, some have observed mechanical 'singing' coming off
the larger tubes, like IN-18s. If the multiplexing frequency is too close
to the mechanical resonating frequency, of the tubes, you may hear the tube
buzzing. That usually can be remedied by altering the frequency. And
On Thu, 20 Sep 2012, threeneurons wrote:
Other than brightness, some have observed mechanical 'singing' coming off
the larger tubes, like IN-18s.
This is the most annoying thing about multiplexing. You can hear the in-18
tubehobby kit singing from across a room.
Anyone delling direct drive
On Wednesday, September 19, 2012 6:39:22 PM UTC-7, dr pepper wrote:
So why is multiplexing a bad idea, and static displays make tubes last
longer?, does multiplexing accelerate cathode poisoning or something?
I have 3 or 4 prototypes I've put together and they all use
multiplxing, even
You forgot the other pro's:
- reduced power consumption
- dramatically increased tube life at equal cathode current.
--
The point is that there isn't a right answer or a religious opinion.
To multiplex or not is really a design decision which should be made
based on your product
Hi there,
On Thu, 20 Sep 2012, threeneurons wrote:
Other than brightness, some have observed mechanical 'singing' coming
off
the larger tubes, like IN-18s.
This is the most annoying thing about multiplexing. You can hear the
in-18 tubehobby kit singing from across a room.
might also be
I've definitely used a few inductors that buzzed nastily before. The
sound of a coil contracting around a ferrite repeatedly.
That's one advantage of using one of those ugly acrylic box cases. :)
Great at noise dampening.
-Adam
On 9/20/2012 11:24 AM, jb-electronics wrote:
Hi there,
On Thu,
The ringing is coming directly from the tubes.
-Dan
On Thu, 20 Sep 2012, Adam Jacobs wrote:
I've definitely used a few inductors that buzzed nastily before. The sound of
a coil contracting around a ferrite repeatedly.
That's one advantage of using one of those ugly acrylic box cases. :) Great
You forgot the other pro's:
- reduced power consumption
- dramatically increased tube life at equal cathode current.
-Adam
Right you are! :))
Here's a few more to support your posts:
- Less weight.
- Fewer calories.
- Smaller Carbon footprint.
Although in fairness, since were
That was my point, really, I was trying to stay in the same reference
frame as your post. Given equal cathode current in both cases, the
multiplexed device will have lower brightness and greater tube life.
Given equal cathode current, the direct driven device will have higher
brightness and
On Sep 20, 11:24 am, jb-electronics webmas...@jb-electronics.de
wrote:
Hi there,
On Thu, 20 Sep 2012, threeneurons wrote:
Other than brightness, some have observed mechanical 'singing' coming
off the larger tubes, like IN-18s.
This is the most annoying thing about multiplexing. You can
I have a multiplexed Z566M clock and it makes quite a lot of noise. I think
tha the noise is produced by the cathodes, because they arent completely
fixed in place by the spacer rings, so they tend to buzz when they are
multiplexed. Thats just my guess though.
On Thursday, 20 September 2012
I reckon I am quids in here - I am 62 years old - and have had at least 2
direct drive clocks (Mike Harrison design) running continuasly for over 20
yrs now - I can't see any deterioation in brightness. But maybe my eyes are
not as good as they used to be. I have built a 6 digit multiplexed
Does this mean that I have more time too?? This is definitely good news
John as I'm over 60. Lets celebrate, I want a beer LOL Ira.
On 9/20/2012 2:13 PM, John Rehwinkel wrote:
I reckon I am quids in here - I am 62 years old - [...] I reckon the clocks I
make now (given the average
The noise made by coils may easily be reduced by the use of PlastiDipR
eric
_
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of kay486
Sent: donderdag 20 september 2012 22:57
To: neonixie-l@googlegroups.com
Subject: [neonixie-l] Re: Why is multiplexing
Well it seems my original post caused some interest.
I was aware of the brightness issues, its a similar story with leds.
I've messed around with 4 or 5 types of tube but never got any audible
sounds from them, I have with switching supplys, but later designs I
use are 30kc and up, I've just been
On Sep 20, 5:07 pm, Tidak Ada offl...@zeelandnet.nl wrote:
The noise made by coils may easily be reduced by the use of PlastiDipR
I don't think I'd use PlasticDip. It has a distinct solvent odor.
We used to use beeswax for flyback transformers. Give that a try.
Terry
--
You received this
I've also seen hot-glue used, especially if the potting is to lower RF
noise.
I'm a big fan of hot glue. I don't know where I first heard the
expression Non-conductive solder, but I've latched onto it happily.
I also like that it easily dissolves in acetone.
-Adam
On 9/20/2012 6:33 PM, Terry
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