synrad rf60 power supply

[javanam]

I have a synrad rf60 power supply that inside has something like glass bulbs that emit violet light light like plasma when laser pulses.
bulbs have 2 wires that are shorted and the 1 wire is soldered to pcb(excited by rf ? not dc)
The problem is that not all these bulbs light some not glow up like the are burned or not working..
What these bulbs do? Are the bulbs the problem or maybe the rf stage like rf transistors driving them?
Laser emits but i think not at full power or not stable.

[mixedgas]

Bulb is not bulb but argon filled calibrated spark gap to protect output.


If one needs parts, it is https://www.photovac.com you should contact.

Steve

[javanam]

Spark gap with only 1 pin ? Because these bulbs have 2 pins but are shorted and soldered together at the same point to pcb.
Spark gap doesn't need 2 pins ? How the protection works ?
PSU has 4 pairs push-pull rf transistors for driving each output and 4 bulbs 1 bulb per pair of push pull rf transistor.
PSU has 2 outputs so 16 rf transistors and 8 bulbs.
In output 1 the middle 2 bulbs don't light and in output 2 the far right bulb doesn't light.
So the psu has 5/8 of his power due to burned rf transistors or the problem can be only the bulbs ?
If remove these bulbs that doesn't light i will get 8/8 of power ?

Can these be like these https://hackaday.com/2021/10/24/the-...as-a-new-trick ?

[mixedgas]

It is either a spark gap (all electrodes used) or capacity coupled on one side and lights when RF high field is present.

Argon suggests it's a spark gap.


Neons used to be used with one electrode grounded to glow in a high RF field in vacuum tube transmitters.

One or the other.,

Steve

- - - Updated - - -

It is either a spark gap (all electrodes used) or capacity coupled on one side and lights when RF high field is present.

Argon suggests it's a spark gap.


Neons used to be used with one electrode grounded to glow in a high RF field in vacuum tube transmitters.

One or the other.,

Steve

[mixedgas]

Link:

neon.pdf

Link to signalite book:

ACDSee 32 print job

Links:

General Electric - Glow Lamp Manual 1966.pdf

[javanam]

2 electroctrodes are connected together so it is not a spark gap.
It is indicator for HF RF but the probem is the lamp of the RF stage ?
I have an oscilloscope and i will try to measure if i have output in these 3 push-pull pairs of RF transistors if i have output
or if it is only the lamp faulty due to lacking inert gas or something else...

If i change the electrolytic caps RF PSU will be need tuning again ?

laser is synrad 57-1 and PSU is RF-60 not 57 both

[javanam]

I have changed the non working lamp with the working and now glow so the lamps are faulty.
Probably they have lost inert gas.
Where can i find replacement ?

[mixedgas]

You are looking for NE2H

Steve