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Posted: 2/3/2020 5:34:22 PM EST
[Last Edit: 2/4/2020 7:19:12 AM EST by Leopold1]
Hi,

I want to install a Katod EPM101G-01-11 with manual gain into a PVS14 housing. The tube has three connections, where as the middle one is the manual gain tab. How do I connect it to the pvs14 board so that I can use the manual gain?
At the moment I shorted the negative and gain tab on the tube so I get 100% luminosity at the moment.

Thx!!
Link Posted: 2/4/2020 3:38:17 AM EST
if you allready shorted those 2 to get max gain then try a 200 ohm (like pvs14 gain pot ) across to see if you can get a range of gain , if it works then you might get away with using the pvs14 gain knob directly
Link Posted: 2/4/2020 4:23:12 AM EST
Where should I connect the gain pad to? With a standard tube you've got the pigtail with the four pins. I assume one of those 4 pinsholes?

Also on de specsheet of the katod, a 50k pot is mentioned for the manual gain.
Link Posted: 2/7/2020 4:51:04 AM EST
Sorry to tell you but these 2 systems are not compatible. 3 contact PSU is a more modern design and use different shortage points and resistor values than MX11769 pigtail.
Link Posted: 2/14/2020 7:08:00 AM EST
[Last Edit: 2/14/2020 7:22:26 AM EST by Leopold1]
For those who are interested, I found a solution.
In order to make the variabal gain work on the Katod there needs to be a variabel resistor of 50k between the negative pad and variable gain pad of the tube.
The PVS 14 itself houses a 200k potmeter. So I connected directly the 200k potmeter between the pads. The only downside is that the range between min and max gain will only use 1/3 of range of the 200k potmeter. But it works prefectly.

Link Posted: 2/15/2020 8:59:55 PM EST
I wish your pictures worked lol.
Link Posted: 2/16/2020 3:35:37 AM EST
i looked at that pic - it worked a day or so ago
Link Posted: 2/17/2020 8:01:38 AM EST
[Last Edit: 2/17/2020 11:33:57 AM EST by Leopold1]
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