70's Dumble Indicator Lamp Assembly Part #?

[rccolgan]

Hello all! My hunt today is figuring out what indicator light assembly part number (or lead to information) for my SSS #004 clone I built. Here is some pictures for reference:

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So far I've stumbled upon Dialight 81 series neon lamp assemblies which looks pretty similar. Here is the data sheet http://www.dialightsignalsandcomponents ... at/53D.pdf

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I'm looking to the forum to understand:

• Did Dumble use these Dialight 81 series neon lamp holders? or is the indicator lamp for SSS #004 different?

• What role does the internal resistor play with the Dialight Neon holder. Brightness?

• What voltage tap did Dumble use for these type of indicators? 6.3v heaters, 120AC?

I believe Dumble amps eventually changed over to LED's but I'm going for the purist point of view for my 70's style.

Thanks in advance!

[martin manning]

Neon indicators are typically powered from the line since a neon bulb needs around 70V to glow. The resistor is required for current limiting.

[rccolgan]

Neon indicators are typically powered from the line since a neon bulb needs around 70V to glow. The resistor is required for current limiting.

Thank you, Martin. That helps clear that up a lot. I'm continuing to dig. I thinkkkk I can get a T-3 1/4 bayonet socket with an incandescent bulb along with the blue lens cap from above. No messing with resistor values and might be just as bright as a Fender jewel. Will let everyone know what I find.

[rccolgan]

Alright.. I believe I'm 98.999% sure I tracked down (and confirmed via purchasing) what indicator lamp lens that Dumble used for SSS #004. I am still unsure what bulb socket was used based on the very blurry gut shot, but I have a pretty good idea how it is visually put together.

Blue Dialight/Dialamp 135 series lens caps. The data sheet says 9/16 27 threads for the cap BUT I found that standard Fender type T47 T3 1/4 bayonet style sockets are 9/16 24 and the Dialight 135 lens screws in securely without any indication that the threads are cross threading.

https://www.mouser.com/datasheet/2/109/ ... 265505.pdf
135 – 32xx – 003

I picked up a NOS Dialight T3 1/4 socket (95 series) https://www.mouser.com/ds/2/109/07D-55744.pdf but there is an extra flange on the outside that doesn't quite look right when I compared to pictures of #004. I found https://www.amplifiedparts.com/products ... relampable and will be using this one instead of a standard Fender bulb holder.

Some pictures of the combination of parts I picked up.

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[Mr. dB]

Neato. Thanks for doing the legwork and sharing your results.

[rccolgan]

Neato. Thanks for doing the legwork and sharing your results.

I’m happy to grow the knowledge base as much as I can. We all get better that way. Looking forward to whatever investigation I go on next in the land of amplifiers.