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In Reply to: RE: Hammond Data - free lunch with Graetz Choke in? posted by andy evans on September 10, 2016 at 02:55:36
What am I missing here - the bridge with choke input seems to have the highest "average volts" output in terms of efficiency.
Follow Ups:
Hello Andy,
Why are you messing around with a 332 Ohm Ohm High Voltage secondary, in audio applications?
WHY waste your time, and your energy??
Jeff
This is a preamp with an 01A tube, which has a 3mA operating point.
What advantages would low DCR transformers and chokes have at 3mA?
This isn't an amplifier.
What advantages did I find this week, when I went from a single 12 AWG wire feeding a 12AX7 at 0.6 mA, of current, the Driver tube in a two stage SET 45 amp,changed to .....a DOUBLE 12 AWG wire, feeding the same 0.06 mA. load, over a UNDER TWO INCH LENGTH.
NIGHT and DAY, a 20% improvement in amp's listenability !! A 70 percent improvement in color, tone, timbre. A 25% improvement in the low end and maybe 10% better dynamics.
In the " after " photo, shown first, you will see two yellow 12 AWG wires connecting to the top od a RF choke, hidden in heatshrink ( blue and red shrink). These two yellow wires are coming off a WIMA DC LINK 50 uF cap, fed by two ( longer yellow wires, also 12 AWG ).In the lower " before" photo, you will see bare 12 AWG wire, feeding two Blue heatshrunk RF chokes, in the same amp, a SINGLE bare 12 AWG wire span, short.
The RF chokes, hidden in heat shrink, are LOW in DCR , uHY rated, BTW, under 1 Ohm, over 1 A. current rated.
So you see, Andy, you and almost everyone else in AUDIO, are unaware of the consequences. A preamp should have the power transformer of an amp, and a GOOD low DCR B+ filter. WE have a LONG way to go in audio and tube audio understanding, world-wide. The TRUTH needs to be known and discussed .
This I write to people with open minds, open ears, who LISTEN and trust their DIY work !!
Jeff Medwin
Edits: 09/11/16 09/11/16
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