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DIY & Tutorials
DIY For Audio
relay advice
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<blockquote data-quote="handsome" data-source="post: 48243" data-attributes="member: 772"><p>ahaaa! why are you using two shunts per input? surely the attenuation of one should be sufficient? I am unsure of the JFET on resistance. </p><p></p><p>For me, with valves, my concern is would be with the other series 47ks being grounded when an input is selected. paralleled that would be approx 10k input impedance, a bit lowish if one is using valve sources. then there is the loss of SNR through input attenuation. Does one really need the summer? surely you could just hang a (largish) volume control at the end?</p><p></p><p>slightly off topic but what do you use to measure your designs (besides spice)? i am looking to get some test equipment</p></blockquote><p></p>
[QUOTE="handsome, post: 48243, member: 772"] ahaaa! why are you using two shunts per input? surely the attenuation of one should be sufficient? I am unsure of the JFET on resistance. For me, with valves, my concern is would be with the other series 47ks being grounded when an input is selected. paralleled that would be approx 10k input impedance, a bit lowish if one is using valve sources. then there is the loss of SNR through input attenuation. Does one really need the summer? surely you could just hang a (largish) volume control at the end? slightly off topic but what do you use to measure your designs (besides spice)? i am looking to get some test equipment [/QUOTE]
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DIY & Tutorials
DIY For Audio
relay advice
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