Eseco Speedmaster A50

[Bill Burk]

Arrived quickly, but my daughter tells me I must report the poor packing. I don’t want to because the darn thing works! Soon as I replaced the cord and confirmed no short I plugged it in and all the lights came on and the sensor responds to light.

Serious smoke residue (probably a fire salvage), but that’s all cleaned up and ready to put back together.

Working on grounding now.

 

[Kino]

Nice! Cleaned up fine! Keep us informed!

 

[gone]

Any landing is a good landing in the parcel delivery game.

 

[Bill Burk]

Inside the front. That big aluminum can is the “sensitivity adjustment. I don’t know if it’s all potentiometer or a smaller one in a big shield.

All the electronics are “floating”. There’s nothing inside touching case ground. But the case is grounded now, ground reaches the probe as well.

 

[Kino]

That's great! Reminds me of a friend's story; His father was working on an old 1960's TV, powered up and with the back off. He touched something that he shouldn't have and was blown back about 3 feet. When my friend reached his father, his quote was, "Son, I taste Copper".

Good idea on the ground...

 

[Bill Burk]

Here’s what the light detector looks like. Photomultiplier tube (PMT). There is a labyrinth behind the grid. These “dynyodes” amplify the light as it goes through

.

 

[mshchem]

SO COOL, LOOKING FORWARD TO UPDATES MORE PHOTOS.

Eseco had an amazing system, I've never used but looks amazing. Everything tied together. I have a roll paper easel from these guys.

 

[Chan Tran]

I don't see where they get the high voltage. I think PMT needs 1000VDC to work.

 

[ic-racer]

RCA Photomultiplier Handbook; answers all one's PMT questions...

http://www.decadecounter.com/vta/pdf/RCAPMT.pdf