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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: After all the theorising, some practical input..... posted by Mark Kelly on January 26, 2004 at 14:46:49:
Mark,Just read your post to my question farther up the page. I spent a good part of the day today listening to music and measuring square waves with a variety of loads on the input transformer. I agree with your assessment 100%. Totally unloaded gave a nice sound and sense of air, but it was bright. Too low of a loading was dull. The switchable load sounds like a good idea to match source material and mood. What it came down to was a tie, soundwise, between the 47k secondary load I had started with and a 500 ohm resistor in series with the primary as suggested by VoltSecond in the post below. They both gave the same square wave response and about the same insertion loss. When I put a 1 megaohm rheostat across the secondaries the square wave response at attenuated levels was far superiour with the 500 ohm series resistance.
Thanks
Michael
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- We meet again - marnold 16:48:34 01/26/04 (0)
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