Hello,
Was sorting my tube collection yesterday and realised I have a whole bunch of EN91 thyratron tubes, I've been thinking of making a tube PSU that can deliver ~200mA at 150-200V and most of the diodes I have are not up to it. The EN91 can handle 500mA which would be great, but I'm not really sure how I'd use a thyratron for a simple rectifier, either full wave or bridge type.
Tried searching around but all I find are references to grid controlled rectifiers where you need to build a little magic box that will tickle the grids just right somehow, but no practical circuit for making this.
Found an old thread here where Hg thyratrons were used for full wave rectification, but they were using the grid instead of the anode and looking at the EN91 datasheet, it seems like it would not like that very much. At least that's my take on it, maybe I'm wrong 🙂
Any got any knowlage on this topic? Maybe I'm not finding any info because it's not a good idea and nobody has done it 😛
Was sorting my tube collection yesterday and realised I have a whole bunch of EN91 thyratron tubes, I've been thinking of making a tube PSU that can deliver ~200mA at 150-200V and most of the diodes I have are not up to it. The EN91 can handle 500mA which would be great, but I'm not really sure how I'd use a thyratron for a simple rectifier, either full wave or bridge type.
Tried searching around but all I find are references to grid controlled rectifiers where you need to build a little magic box that will tickle the grids just right somehow, but no practical circuit for making this.
Found an old thread here where Hg thyratrons were used for full wave rectification, but they were using the grid instead of the anode and looking at the EN91 datasheet, it seems like it would not like that very much. At least that's my take on it, maybe I'm wrong 🙂
Any got any knowlage on this topic? Maybe I'm not finding any info because it's not a good idea and nobody has done it 😛
Have a look at the PY500A, max average current 440mA, max peak current 1000mA.
I'm sure those are great, but I don't have over 20 of those just laying around in a box already 🙂
But on the other hand £5 buys a lifetime supply, and you don't need to introduce other complexity.
I mean the PY500A is cheap, but not THAT cheap.
Best I could find was an auction for three sitting at €10 when taking a quick gander at the market, and I don't plan on getting of the ride within the lifespan of one set 😄
Either way I am interested in using these as rectifier tubes as I find that an interesting topic I couldn't find anything solid on