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In Reply to: Re: Complex music v. ? on ? and ? posted by BBeck on July 8, 2006 at 18:14:11:
answer some questions? If all else was kept a constant and a plate load choke of high enough inductance was used along with a coupling cap of high enough quality, it would seem to me that they would help with regards to the ideas you bring up (which I think sound very reasonable and likely). Of course the conclusions would be colored by the removal of DC current through the OPT.
Russ
Follow Ups:
Some people think that the DC current through the OPT actually is a desirable feature of a SET, despite the air gap and lower primary inductance. The DC magnetization moves the operating point of the transformer up the BH curve away from the flat spot around zero current into a more linear region where there may also be less hysteresis to confound the sound. The slope is no longer symmetrical, so any distortion will have a heavy 2nd harmonic component which is consistent with the overall SET theme. I'm no magnetics expert, so I hope others will elaborate.
Russ, you gotta remember that Parafeed still uses an OP TX, the turns ratio of which determines the plate load so there's no difference in this department.I've compared Parafeed on 845s ... almost exactly the same results when using the same load. In fact distortion was just a tad higher on Parafeed, and that was with a very good and very expensive plate choke and monster, hand-made 2kV PIOs!
Naz
I wanted that post back as soon as I hit the submit button. I hadn't logged in so I couldn't delete it. I was thinking like it was a normal RC stage and the choke would allow a more linear load line and the ability to swing more volts cleanly.
Russ
It's a bugger when that happens. Done it a few times myself but managed to delete the post and re-send. I probably grabbed it quickly ... been up at all hours here!Naz
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