Re: [neonixie-l] Re: Homebrew high voltage nixie power supply

[Bill Notfaded]

Sounds great!  I have some 18v supplies as well.

Bill

On Sat, Sep 21, 2019, 7:13 PM Kevin A. 
wrote:

> And to be clear, it does run at 12 volts as well. However, the controller
> will turn the HV off at around 110-130 milliamps as the inductor duty cycle
> approaches 100%.
>
> On Saturday, September 21, 2019 at 10:07:07 PM UTC-4, Kevin A. wrote:
>>
>> Update:
>>
>> A quick test shows that the 40 watt version works! It turns out, however,
>> that 12 volts in is a bit too low for this design at this power level. By
>> upping the input voltage to 24 volts (which is reasonable - there are
>> plenty of cheap 24 volt wall warts as well), the design functioned as
>> intended (all components within rated spec at 24 volts as well). Output
>> across a fixed 876 ohm load settled at 179 volt ~201 milliamps for a 24
>> volt 1.65 amp input, which translates to 91% efficiency. There really isn't
>> any practical benefit to running at 12 volts with double the input current.
>> Efficiency would drop and heat would increase throughout the circuit to
>> attain the same power.
>>
>> If any clocks or systems out there need a lower operating voltage and you
>> want to run off of one power input, I can add 24 volt breakouts for your
>> own DC-DC converter. A second option would be to build in a second switcher
>> to step the input 24 volts down to an adjustable voltage between 1.2V-24V.
>> This is fairly straightforward using a controller like the LM2576T-ADJ. It
>> will, however, increase size and cost (current size is 3.3 inches x 2.1
>> inches).
>>
>> I want to perform some thermal testing when I have access to my infrared
>> camera this week as well. I did some poking around to see what was warm
>> after the supply was turned off. As expected, the transistor and diode did
>> produce some heat, but they were only warm to touch. My 100 watt load
>> resistor, however, was getting pretty warm!
>>
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[neonixie-l] Re: Homebrew high voltage nixie power supply

[Kevin A.]

And to be clear, it does run at 12 volts as well. However, the controller 
will turn the HV off at around 110-130 milliamps as the inductor duty cycle 
approaches 100%. 

On Saturday, September 21, 2019 at 10:07:07 PM UTC-4, Kevin A. wrote:
>
> Update:
>
> A quick test shows that the 40 watt version works! It turns out, however, 
> that 12 volts in is a bit too low for this design at this power level. By 
> upping the input voltage to 24 volts (which is reasonable - there are 
> plenty of cheap 24 volt wall warts as well), the design functioned as 
> intended (all components within rated spec at 24 volts as well). Output 
> across a fixed 876 ohm load settled at 179 volt ~201 milliamps for a 24 
> volt 1.65 amp input, which translates to 91% efficiency. There really isn't 
> any practical benefit to running at 12 volts with double the input current. 
> Efficiency would drop and heat would increase throughout the circuit to 
> attain the same power. 
>
> If any clocks or systems out there need a lower operating voltage and you 
> want to run off of one power input, I can add 24 volt breakouts for your 
> own DC-DC converter. A second option would be to build in a second switcher 
> to step the input 24 volts down to an adjustable voltage between 1.2V-24V. 
> This is fairly straightforward using a controller like the LM2576T-ADJ. It 
> will, however, increase size and cost (current size is 3.3 inches x 2.1 
> inches). 
>
> I want to perform some thermal testing when I have access to my infrared 
> camera this week as well. I did some poking around to see what was warm 
> after the supply was turned off. As expected, the transistor and diode did 
> produce some heat, but they were only warm to touch. My 100 watt load 
> resistor, however, was getting pretty warm!
>

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RE: [neonixie-l] Re: OT : Natsemi clock module data wanted

[Dave ZL3FJ]

 

Thanks very much- every little bit helps.

Cheers

Dave B, NZ

 

From: 'orange_glow_fan' via neonixie-l [mailto:neonixie-l@googlegroups.com] 
Sent: Sunday, September 22, 2019 12:58
To: neonixie-l
Subject: [neonixie-l] Re: OT : Natsemi clock module data wanted

 

data sheet for the MA1026..not sure if it will help much

 

 

 

 


On Sunday, September 15, 2019 at 2:46:15 AM UTC-4, Dave Brown wrote:

Subject line sez all- I DO have the 1977 databook that covers some of these 
but not all.  It covers the following-  MA1002, MA1003, MA1010, MA1012, 
MA1013. 
 These modules are based on the MM5313, MM5314 etc  series of clock ICs but 
are a separate set of modules with added support circuitry  around the clock 
IC. 
 So, I'm looking for data on MA modules NOT listed above. I understand 
some MA modules include other functions beyond the basic clock function. 
 Thanks 
DaveB, NZ 



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 .

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RE: [neonixie-l] FS: IN-12, IN-14 and other

[Michail Wilson]

I want….

 

IN12B - 22 pcs. for $2 ea.

IN14 - 16 pcs. for $5 ea.

IN14 used - 22 pcs. for $3 ea.

IN15B - 107 pcs. for $1 ea.

Sockets for IN12, IN15 - 50 pcs. for $0,5 ea.

 

Free shipping?

 

Michail

 

 

 

 

 

From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On 
Behalf Of  ??
Sent: Saturday, September 21, 2019 1:11 PM
To: neonixie-l
Subject: [neonixie-l] FS: IN-12, IN-14 and other

 

Sale:

IN8-2 - 5 pcs. for $8 ea.

IN12A - 31 pcs. for $2 ea.

IN12B - 22 pcs. for $2 ea.

IN13 - 3 pcs. for $3 ea.

IN14 - 16 pcs. for $5 ea.

IN14 used - 22 pcs. for $3 ea.

IN15A - 101 pcs. for $1 ea.

IN15B - 107 pcs. for $1 ea.

Sockets for IN12, IN15 - 50 pcs. for $0,5 ea.

LC-531 - 1 pc. for $4

LC-531 used - 1 pc. for $2

Z570M used - 2 pcs. for $4 ea.

Z573M used - 29 pcs.for $3 ea.

Z5810M - 1 pc. for $4

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 .

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[neonixie-l] FS: IN-12, IN-14 and other

[Юрий Овчинников]

Sale:
IN8-2 - 5 pcs. for $8 ea.
IN12A - 31 pcs. for $2 ea.
IN12B - 22 pcs. for $2 ea.
IN13 - 3 pcs. for $3 ea.
IN14 - 16 pcs. for $5 ea.
IN14 used - 22 pcs. for $3 ea.
IN15A - 101 pcs. for $1 ea.
IN15B - 107 pcs. for $1 ea.
Sockets for IN12, IN15 - 50 pcs. for $0,5 ea.
LC-531 - 1 pc. for $4
LC-531 used - 1 pc. for $2
Z570M used - 2 pcs. for $4 ea.
Z573M used - 29 pcs.for $3 ea.
Z5810M - 1 pc. for $4

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Re: [neonixie-l] Re: B5971 Graduation Cap PCB

[Mahdi Al Husseini]

Thanks bill!

On Fri, Sep 20, 2019 at 7:07 PM Bill Notfaded  wrote:

> You got it that's going to be the coolest grad cap ever Mahdi!!!
>
> Bill
>
> On Thu, Sep 19, 2019, 3:13 PM Mahdi Al Husseini 
> wrote:
>
>> Thanks Martin! And sure thing Bill, I only need one grad cap! Cover the
>> shipping and I’ll send you an unassembled board with a parts list for free
>>
>> On Thu, Sep 19, 2019 at 3:28 PM Bill Notfaded 
>> wrote:
>>
>>> I've got some B-5971's Mahdi... any spare boards there???  You know I'd
>>> be in.
>>>
>>> Best Regards,
>>>
>>> Bill
>>>
>>> On Thursday, September 19, 2019 at 9:48:10 AM UTC-7, Mahdi Al Husseini
>>> wrote:

 Something different, but still fun. This was the first go around, and
 not yet assembled, as you can see. Uses B5971s. 8266 connects to local wifi
 and allows me to pass display data over an app on my phone. Final product
 to be used for a 2020 Spring graduation. Will post documentation once I get
 a chance to write it up!

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>>> .
>>>
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Re: [neonixie-l] Re: Scored a neat power supply today... and some nixie I can't find datasheet for... NL-919

[Bill Notfaded]

Yeah it was an awesome find for sure and if you guys knew the price I paid
you'd freak!  I've seen it sell for almost a G before but I paid less than
an order of magnitude less!!! So psyched!

Bill


On Sat, Sep 21, 2019, 4:40 AM Tomasz Kowalczyk  wrote:

> Wow! This power supply is neat. I play with vacuum tube amplifiers too and
> this has almost the specs I would ask if I was to order a custom one for
> amplifier doodling! Great stuff.
>
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[neonixie-l] Re: Scored a neat power supply today... and some nixie I can't find datasheet for... NL-919

[Tomasz Kowalczyk]

Wow! This power supply is neat. I play with vacuum tube amplifiers too and 
this has almost the specs I would ask if I was to order a custom one for 
amplifier doodling! Great stuff.

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