[neonixie-l] Re: Clanging Nixies

2017-01-16 Thread MichaelB
yep, the clocks that do this have none of the fancy stuff either. Jeff 
Thomas clocks.

On Monday, January 16, 2017 at 4:19:30 PM UTC-8, gregebert wrote:
>
> I didn't add cross-fade, PWM dimming, or anything fancy to my clocks. Just 
> plain ol' direct-drive. No noises of any kind.
>

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[neonixie-l] Re: Clanging Nixies

2017-01-16 Thread gregebert
I didn't add cross-fade, PWM dimming, or anything fancy to my clocks. Just 
plain ol' direct-drive. No noises of any kind.

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[neonixie-l] Re: Clanging Nixies

2017-01-16 Thread MichaelB
No, I have both direct and muxed IN-18 clocks. The muxed ones don't do it. 
Nor do the direct drive clocks do it that have a cross fade feature, i.e. 
the newer PV clocks. 

Curious if your DD clock has the cross fade feature activated? This seems 
to have a bearing on if the noise is there or not.

On Monday, January 16, 2017 at 8:44:38 AM UTC-8, gregebert wrote:
>
> >All my IN-18 clocks clang.  Must be inherent to that tube.
>
> Are all of your IN-18 clocks multiplexed ?
> My IN-18 clock makes no clanging or any other audible noise. It's 
> direct-drive (non-multiplexed)
>

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[neonixie-l] Re: Clanging Nixies

2017-01-16 Thread gregebert
>All my IN-18 clocks clang.  Must be inherent to that tube.

Are all of your IN-18 clocks multiplexed ?
My IN-18 clock makes no clanging or any other audible noise. It's 
direct-drive (non-multiplexed)

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[neonixie-l] Re: Clanging Nixies

2017-01-15 Thread Greg P
All my IN-18 clocks clang.  Must be inherent to that tube.



On Sunday, January 15, 2017 at 5:06:47 PM UTC-5, MichaelB wrote:
>
> You know, I can't isolate which digits are doing it and when. It seems 
> very random which would make sense since I'm sure the the digits cool at 
> varying rates based on their size and shape.
>
> Don't get me wrong, it does not bother me, in fact. I kind of like. It is 
> very subtle.
>
> On Sunday, January 15, 2017 at 1:08:13 PM UTC-8, jf...@my-deja.com wrote:
>>
>> On my B7971 clocks, you can hear the tubes “sing” at the mux rate, and 
>> the “timbre” would change as the digits changed (the mux’ing also generated 
>> at lot of RFI).  I mentioned this many years ago when I said that they 
>> had been running 24/7 for over 30 years (now 40) with zero tube failures. 
>>  One other list member suggested that I might have been hearing the 
>> magnetostriction from the transformers in the SMPS, but I found this 
>> unlikely since I could isolate the sound to the tubes and because I had 
>> used linear power supplies.
>>
>>  
>>
>> BTW, is the “clanging” noticeably louder when multiple digits change 
>> simultaneously?  (On my computer, the clanging in the video is not 
>> synchronized with the changing seconds digits).
>>
>>  
>>
>> You might be able to reduce the noise by increasing the rise time of the 
>> current applied to the tubes.
>>
>

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[neonixie-l] Re: Clanging Nixies

2017-01-15 Thread MichaelB
You know, I can't isolate which digits are doing it and when. It seems very 
random which would make sense since I'm sure the the digits cool at varying 
rates based on their size and shape.

Don't get me wrong, it does not bother me, in fact. I kind of like. It is 
very subtle.

On Sunday, January 15, 2017 at 1:08:13 PM UTC-8, jf...@my-deja.com wrote:
>
> On my B7971 clocks, you can hear the tubes “sing” at the mux rate, and the 
> “timbre” would change as the digits changed (the mux’ing also generated at 
> lot of RFI).  I mentioned this many years ago when I said that they had 
> been running 24/7 for over 30 years (now 40) with zero tube failures.  One 
> other list member suggested that I might have been hearing the 
> magnetostriction from the transformers in the SMPS, but I found this 
> unlikely since I could isolate the sound to the tubes and because I had 
> used linear power supplies.
>
>  
>
> BTW, is the “clanging” noticeably louder when multiple digits change 
> simultaneously?  (On my computer, the clanging in the video is not 
> synchronized with the changing seconds digits).
>
>  
>
> You might be able to reduce the noise by increasing the rise time of the 
> current applied to the tubes.
>

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