Powe supply for tubes

[KB3NOV]

Hi,
    I have not found a circuit like this and would like to know is theres anything wrong with my idea.

Picture a transformer with a FWB rectifier.
Now a C-L-C section. Next another SEPERATE L-C section
from the rectifier. The C-L-C would be TX power and the L-C section with a higher HY and lower MA rating to lower the output voltage for the RX. The TX would be QRP or 10W or so. Not high power. I also would use a circuit I found using a LR8N and a pass transistor to regulate screen voltage.

                            Thanks and 73,

                              Jennifer / KB3NOV

[HA5RXZ]

Sounds OK but I think you might be going the long way round.

HT supplies for tubes used to use big series chokes because the HV condensers were only available in low values. Typically you would see a 5H series choke with some paper capacitors either side to chassis. The whole thing formed a low-pass filter which would not let mains hum through.

We now have some great high voltage capacitors available and that big choke is no longer needed. A quick glance at my Mouser catalog shows values up to 450 volt 3,300uF. Hook one of these across your full wave rectifier and it would probably do the job.

HA5RXZ

[KB3NOV]

Hi,
   Thanks for the answer. I have decided to go with a single filter section, instead of two seperate. I found on the web a site  DUNCAN AMPS. There is a free program called  PSUDII. It is to figure power supplys.
I found a supply on a web site that the person is knowledgable, and put in their parts specs. The program
was VERY close to what they said it would put out.

The program is nice. Find out before buying the wrong parts. I ran a simulation using a CLC 47uf-5hy-450uf
filter section. It had ripple, and really stressed out the parts on start up. I have decided on clclc.
47uf - 5hy - 47uf - 5hy - 47uf. The loading on parts much less, and the ripple...what ripple .

This program is really neat. Shows a lot. And at a price any cheap ham is looking for...FREE .

                      73,

                     Jennifer