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6th February 2007, 01:36 AM
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#1 |
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diyAudio Member
Join Date: Oct 2006
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WTH -- UL back to triode connection
What in the world....
Have a ST70 with kevinkr's driver. Was originally hooked up in triode mode. Had nice looking square waves after some tweaking (under a previous thread). NO problems. Out of curiosity, I connected things in Ultralinear (only the left channel), just to hear the difference. No big improvement, so I went back to triode. Now, square waves look like this. Sorry for the blurriness, but you get the picture. What happened? Doublechecked I put the 100 ohm resistor back - from pins 3 to 4. UL tap is connected to pin 6, which has no internal connection. ???????? |
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6th February 2007, 02:11 AM
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#2 |
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diyAudio Moderator
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What's the frequency? If that's 100 Hz or less, you're seeing the normal LF rolloff.
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“Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache |
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6th February 2007, 02:42 AM
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#3 |
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diyAudio Member
Join Date: Oct 2006
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HAHAHAHA.
No, it's 1kHz, and I had a major brain fart. Yep, it's LF rolloff. I have a 80Hz 6dB filter on the input, and forgot to inject after it. Sorry for wasting your time. Doggone, you are quick and accurate, SY. |
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6th February 2007, 02:59 AM
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#4 |
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diyAudio Member
Join Date: Sep 2006
Location: Pleasant Hill, CA
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I thought you've fried your output tranny.
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