Chris
Emo VIPs 
Posts: 424
|
Post by Chris on Feb 9, 2021 10:45:24 GMT -5
My latest video on the DIY HiFi Life Channel covers the VTV Purifi Amplifier. Stay tuned for my next video where I show how to upgrade this amp as well. Like and Subscribe is always appreciated.
|
|
|
|
Post by leonski on Feb 9, 2021 23:25:02 GMT -5
I went to original bench results. OK.
Now, the real question is how does this amp do in to a REAL speaker load? Let's say 45degree capacitive .....or inductive.....take your pick.
Will one of the options allow the use of 'standard' pinout OpAmps? I'd start with a set of OPA2134, but that's just me.
|
|
Chris
Emo VIPs
Posts: 424
|
Post by Chris on Feb 17, 2021 10:41:11 GMT -5
My latest video.
VTV Purifi Amplifier - Input Buffer Upgrade
|
|
|
|
Post by leonski on Feb 17, 2021 14:48:59 GMT -5
IMO? One fine way to test opamps without all the other circuittry is to use a CMOY headphone amp. This is a very simple DIY requiring only the ability to read a circuit layout diagram and solder. Parts might cost 20$ these days. It has a single socketed dual opamp, so it takes seconds to swap. tangentsoft.net/audio/cmoy/The simplicity of this circuit helps isolate differences in opamps. And if you read thru the docs, you'll see a large number of possibles. First up? I'd improve the PS which will also improve battery life. |
|
