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Audio and Video Talk
Vinyl
I finally took the vinyl plunge
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<blockquote data-quote="gbyleveldt" data-source="post: 54519" data-attributes="member: 122"><p>Thanks, not too sure about that though <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> </p><p></p><p></p><p></p><p>The TPA6120 performs better in inverting mode than it does in non-inverting. The catch is that you need to drive it from a very low impedance source, so no volume pots then. If you do want a volume pot, like I wanted here, you need to use a buffer stage between the pot and the TPA. I just slapped in an OPA2134, I've not had too much time to roll a few opamps in there yet, it's actually very good the way it is already. </p><p></p><p>I do think the phono pre can do with a fair amount of tweaking still. I've got a few of those OPA637's lying around that I used in this, but I'll try a few other configs as well. It is better to use FET opamps here (as there's not too much bias voltage available for using bipolar opamps) so that kinda limits the scope a little.</p><p></p><p></p><p></p><p>And you're a saint, huh? ;D</p></blockquote><p></p>
[QUOTE="gbyleveldt, post: 54519, member: 122"] Thanks, not too sure about that though ;) The TPA6120 performs better in inverting mode than it does in non-inverting. The catch is that you need to drive it from a very low impedance source, so no volume pots then. If you do want a volume pot, like I wanted here, you need to use a buffer stage between the pot and the TPA. I just slapped in an OPA2134, I've not had too much time to roll a few opamps in there yet, it's actually very good the way it is already. I do think the phono pre can do with a fair amount of tweaking still. I've got a few of those OPA637's lying around that I used in this, but I'll try a few other configs as well. It is better to use FET opamps here (as there's not too much bias voltage available for using bipolar opamps) so that kinda limits the scope a little. And you're a saint, huh? ;D [/QUOTE]
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Audio and Video Talk
Vinyl
I finally took the vinyl plunge
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