I am searching for a strobe light for my Micro Seiki DDX-1000. According to the parts list part designation is "NL-77". I was checking the archive of this forum and it looks like that this part is NLA. Does anybody have an idea how to fix this or even found a new source for this neon light? The light is internally pulsed so a direct hook up of the light to line voltage and -frequency is not possible here.
You can make this DIY strobe - it works with LEDs and short pulses - it will be a good sharpness. I did it myself. LED color - of your choice. I soldered it to a small PCB and put it inside TT - instead of neon.of course in your case it will take a little ingenuity to make it look beautiful.
link:
DIY Strobe - Turntable Timing Light | Vinyl Engine
link:
DIY Strobe - Turntable Timing Light | Vinyl Engine
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Even easier 10Pcs Red Neon Light Lamp On Off DPST Rocker Switch 3 Pin 10A/250V 20A/250V AC high quality|Switches| - AliExpress I robbing the switch on the lamp
Thank you both for your responses.
i agree with you Osscar: An LED solution would be next best thing after finding the original bulb. My only concern would be to get a coherent light as the original bulb is quite long...KAB: I was thinking about that as well but the current bulb is powered by an internal circuit with approx. 60-70V DC so I am not sure if the bulb you suggested would work.
Meanwhile, I found a smaller bulb on eBay which I ordered. I guess I nee to experiment and improvise, and if all fails I will replace it with the above LED solution.
Thanks again!
i agree with you Osscar: An LED solution would be next best thing after finding the original bulb. My only concern would be to get a coherent light as the original bulb is quite long...KAB: I was thinking about that as well but the current bulb is powered by an internal circuit with approx. 60-70V DC so I am not sure if the bulb you suggested would work.
Meanwhile, I found a smaller bulb on eBay which I ordered. I guess I nee to experiment and improvise, and if all fails I will replace it with the above LED solution.
Thanks again!
Remove the resistor from an ordinary neon lamo, and replace it with a lower value, that is enough for you to use it in the turntable.
Regular neon lamps need 60-70 volts, the drop from mains is done by a series resistor, which also acts as a current limiter.
So check your circuit, maybe the resistor is still fine.
If not, replace resistor with same value.
Or change to a bright focussed LED...
Regular neon lamps need 60-70 volts, the drop from mains is done by a series resistor, which also acts as a current limiter.
So check your circuit, maybe the resistor is still fine.
If not, replace resistor with same value.
Or change to a bright focussed LED...
Thanks. I will do that once I receive my replacement bulb. I am hopeful to find a solution here...
> NLA
=No Longer Available??
NL77LA may be scarce, but the basic NE-2 is still available.
https://www.amazon.com/s?k=neon+bulb
Yes, electrically it is "just a neon". The schematic is drawn to confuse, but it is a 130VDC source, a 22k resistor, a neon, and a transistor to make it flicker.
=No Longer Available??
NL77LA may be scarce, but the basic NE-2 is still available.
https://www.amazon.com/s?k=neon+bulb
Yes, electrically it is "just a neon". The schematic is drawn to confuse, but it is a 130VDC source, a 22k resistor, a neon, and a transistor to make it flicker.
Attachments
PRR: Thanks - yes I meanwhile found a source for the NE-2 ("A1A") and I am going to try that. The one I ordered is probably too small. I want to replicate the coherent light source of the original bulb which is pretty big.
Update: I got lucky - the bulb is ok. The two capacitors C4, C5 were bad. After replacing them, the strobe is back to its former glory. Thanks again to all.
check out post #17 under