"Yves Monmagnon" wrote in message
...

"jim" wrote in message
...
Don't want to get into the valve/silicon, which is best, debate. You
makes
yer choices and that's OK by me. It's all down to the schematic and
what
you believe in....

I use silicon. Don't need a heater and low voltage drop...... IN4007 ?
..

Me too ! Just shunt each diode with about 1000 to 2000 pF (2000V) ceramic
cap.
Some use a "snubber" (around 0.01 to 0.1 µF in serie with 100 to 500 Ohms)
accross the
HV winding, not tested.
I was annoyed with spikes noise in a phono preamp before I do that.
UF 4007 seems OK w/o caps.

keep seeing it on schematics .... what's wrong with BY127 ? ....seems
to
have a better spec.. or .. I now use encapsulated industrial
bridges....
About 1" square. Bolt down solid to the chassis with a 1/4" nut and
bolt,
have four Lucar/spade connectors.... cost about £2 and are rated at
1500
PIV at 35 AMPS !!!

They don't get very warm with 500mA through them , so a heat sink is not
an
issue !!

Any comments ?

Kind regards
jim

Eh, salut , Yves.... L'Ardeche.... eh... mon dieu !

Now using 4 pin industrial silicon bridges. No caps across them. 10H
500mA 50 ohm LC choke smoothing with 0.22uF 1500v polypropylene snubber
caps either side of the choke joined together and taken down to earth
followed by 2 x 470uF 450v caps in series with 220k balancing resistors
across them.... This does everything I need
best wishes mon ami
jim