Good day all
Has any one a good circuit to use to lift the heater votage of a concertina phase splitter in order to diminish the chaces of a heater /cathode break down, is this the best solution or are there other circuits to consider.
Acorn
Heater/cathode supply
- pre65
- Amstrad Tower of Power
- Posts: 21373
- Joined: Wed Aug 22, 2007 11:13 pm
- Location: North Essex/Suffolk border.
#2
Potential divider I would have thought.
Here is a calculator.
http://www.electronics2000.co.uk/calc/p ... ulator.php
Here is a calculator.
http://www.electronics2000.co.uk/calc/p ... ulator.php
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- Mike H
- Amstrad Tower of Power
- Posts: 20157
- Joined: Sat Oct 04, 2008 5:38 pm
- Location: The Fens
- Contact:
#3
I might consider split the lower concertina resistor into two, and tap it into there
Followed with a bit of an RC filter natch.
I presume concertina phase-splitter grid is DC connected to 1st stage anode? Sounds like it is
Followed with a bit of an RC filter natch.
I presume concertina phase-splitter grid is DC connected to 1st stage anode? Sounds like it is
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- IslandPink
- Amstrad Tower of Power
- Posts: 10041
- Joined: Tue May 29, 2007 7:01 pm
- Location: Denbigh, N.Wales
#4
Low current voltage divider as Phil says, get values to give you a mA or 2 ma . Put a suitable cap (100u, 220u ) across the lower resistor to get a low-Z AC ground, otherwise the electrostatic coupling onto the transformer winding will pull it around and put noise onto the filament & hence cathode .
Thanks for the resistors, Neil !
Thanks for the resistors, Neil !
"Once you find out ... the Circumstances ; then you can go out"
#5 Heater/cathode
Good -day
Thanks for the information lads.
Acorn
Thanks for the information lads.
Acorn