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#1
21st June 2016, 01:40 PM
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WD SUT's
Hi all, I am still not completely happy with my SUT's from when Peter C was in charge, so I have done a few tests of my transformers and a Pickering step up amp. there are a few pictures, so follow the posts. Picture 0001 is direct connection from generator to scope, 0002 is the same but in auto mode.
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#2
21st June 2016, 01:44 PM
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Re: WD SUT's
Picture 0003 is one transformer, at 1000Hz, picture 0004 is at 10000Hz.
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#3
21st June 2016, 01:45 PM
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Re: WD SUT's
Picture 0005 is at 20000Hz, and 0006 is at 50000Hz.
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#4
21st June 2016, 01:49 PM
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Re: WD SUT's
Picture 0007 to 0010 are the SS Pickering, and as can be seen, the wave form is very little altered, compared to the transformers.
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#5
21st June 2016, 01:51 PM
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Re: WD SUT's
The sound of the Pickering is very very nice, why is the transformer distorting the signal?, any thoughts anyone. BOB
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#6
21st June 2016, 03:15 PM
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Re: WD SUT's
Hi Bob, they look good to me and the distortions are just limitations of bandwidth and phase shift which you'll find on TX coupled gear at high and low frequencies. When/if you set up Phono3S adjustable capacitors you'd use 1KHz SW and tweak for the cleanest corner. Pic 03 shows a little LF phase shift at 1KHz, 04 looks good for 10KHz, 05 shows a little HF roll off at 20KHz and 06 shows more HF roll off at 50KHz. Hopefully John will add/amend my thoughts. Did you check at lower F ?
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