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In Reply to: RE: Choke Saturation posted by Triode_Kingdom on May 09, 2017 at 06:46:39
Jack
I have measured the current going into the choke and out of the choke at idle as well as with full power driven by a 1khz signal into the amp.The choke saturates and becomes somewhat magnetic but not only that,its effective filtering is almost non-existent vs a resistor in its place.In the Dyna Mk3s,they do better as far as filtering but where that choke would work well is an ElCheapo where the total circuit draws 100ma or less.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 05/09/17Follow Ups:
"The choke saturates and becomes somewhat magnetic but not only that,its effective filtering is almost non-existent vs a resistor in its place."
So you compared the amplitude of 120 Hz ripple at the input and output of the choke? You did this both at idle and at full power? Just want to understand how the test was performed.
--------------------------
Buy Chinese. Bury freedom.
Chokes with DC flowing through them do get magnetic...it is afterall a single coil, forming an electromagnet. It is decidedly unclear how the saturation status was measured...:)
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
A Triad C-24X ($9.81) costs less than a "Dynaclone" C-354 ($23.95). The C-24X is the currently recommended part, for "El Cheapo" builds.
Eli D.
Edits: 05/09/17
The St.70 is very cramped for space. Best to use it as a monoblock chassis. Remove an OPT, put an end-belled Hammond in its place. Put a pair of damper diodes in place of the EL34's on that side( 1.2A 6AX4's will do *JUST* fine ). No more pushed over the edge 5AR4's need be acquired...:) and the OE PA060 will support a single channel quite well. Use the C354 to decouple the filter stage used by the split-load PI...or what ever the third stage filter is feeding.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
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