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A place to discuss member's DIY audio projects & post pictures/schematics. NOTE: There is a limit of 2MB per attachment, and a maximum of 3 attachments per message. If you need to post more than 3 attachments, just add another message.
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another phono preamp

April 2nd, 2017, 11:53 am

this is from http://www.psaudio.com/article/39395/
I believe its a pretty standard circuit.
PS Audio made it very simple to get pcb and parts. designed to run on 9 volt batteries. I had ps laying around so I used it, running at 14vdc
Still breaking in and sound pretty good
this is MM only. I am using it with a SUT so gain is at minimum, loading 47k
chips are OPA2134 in first stage and LM4562 in 2nd stage

Re: another phono preamp

April 3rd, 2017, 1:08 pm

It will be interesting to bring to a shoot-out and compare it to other pre-amps. Maybe I can build my pre-amp and compare with yours!

Re: another phono preamp

April 3rd, 2017, 3:29 pm

time to put it in a nice box. As of now it will not replace my tube preamp I built six or seven years ago, but go on the shelf as a spare. It was a Transendent Sound kit. It uses the Russian 6C45pi in first stage and 12AX7 in second.
I keep looing for a better preamp but have not found it yet. It needs a PS upgrade of a larger B+ transformer and more dampening in the case.
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