Hello all,

@wings

as Im this week on vacation Im working all the days on my TPU power supply. In this moment I dont have anymore my "old" power supply but I can say that I followed exact SM words where he describes how to build a tube power supply. I wish I could use a 5U4 tube but I have to wait.....

The point is in mixing a 5VDC from the heater and the plate voltage. Im building this with a EZ 81 rectifier tube. I hope it will work. Hmmm....not so sure.

Otto

hi


Tubes gives good current hmmmm........

Quote from: otto on March 10, 2009, 06:05:48 AM
Hello all,

you really think its only a oridinary power supply.

Its OK but then you can answer me my question:

Why is my my output electrolytic capacitor slowly charging?? The voltage rises from 0V to 4V.

The power supply is disconnected from the wall, the oscillators are disconnected from the wall.

Is it the tube or my copper core??

Otto

PS: yes, this is normal.

my be the radioactive effect of the filament - thoriated tungsten ?


nice information on RCA tube here:

http://www.tech-systems-labs.com/books/rca26.pdf


more :

http://www.tech-systems-labs.com/books.htm

@otto
Have you seen this?
http://www.overunity.com/index.php?topic=6970.msg162847#msg162847

Quote from: otto on March 09, 2009, 02:20:01 AM
Hello all,

thanks Bruce for the schematic. This schematic is very important!!!

I used a EZ 81 rectifier tube but its a wrong tube!! Im waiting for my 5U4 tube that I have ordered.

Now, electronics experts, show me what is sooooo special with the 5U4 tube. Im not so clever.

Otto

EZ81 - the two anodes around the central cathode
http://r-type.org/exhib/aam0049.htm

5UGB - two ribbon filaments coated with oxide in series two plates
http://r-type.org/exhib/aaq0051.htm

http://r-type.org/exhib/aaa0504.htm

http://r-type.org/pdfs/5u4gb.pdf