I have recently bought a Cambridge Audio A1 mk3 SE. My system consists of this, a Rega RP1 and some Wharfedale Diamond 9.1s. The amp doesn't have the phono stage card installed and they seem to be impossible to find.
I have checked the schematic on hifiengine and inside the box and it seems that it should be possible to design an build a phono stage to fit in the spot where the PM01 should go. Looking at the schematic I have decided the V2 connections seem most sensible (though they are pretty much interchangeable).
Here we see the power and ground at the bottom (+-28V) and signal at the top. Also there is a securing screw hole at the top.
I was going to base my design on this one. - DIY Phono Preamp : Recording Magazine -. Has anyone built a phono stage like this, any changes they recommend?
I want it to be reasonable quality (it's a cheap amp, let's not go crazy), easy to build and reliable.
I have checked the schematic on hifiengine and inside the box and it seems that it should be possible to design an build a phono stage to fit in the spot where the PM01 should go. Looking at the schematic I have decided the V2 connections seem most sensible (though they are pretty much interchangeable).
An externally hosted image should be here but it was not working when we last tested it.
Here we see the power and ground at the bottom (+-28V) and signal at the top. Also there is a securing screw hole at the top.
I was going to base my design on this one. - DIY Phono Preamp : Recording Magazine -. Has anyone built a phono stage like this, any changes they recommend?
I want it to be reasonable quality (it's a cheap amp, let's not go crazy), easy to build and reliable.
That circuit will work, but is probably not up to what the rest of your gear is capable of producing.
I would look at RJM Audio - Op amp Passive Phono Preamplifier
I would look at RJM Audio - Op amp Passive Phono Preamplifier
I much prefer the website you linked, the informations is much better laid out. On that page it recommends a simpler circuit for MM cartridges (I will not be using MC cartridges) as here RJM Audio - The Very Simple Phono Stage.
Is there any reason you suggested the first model?
Is there any reason you suggested the first model?
Did you get any further?
I found the same amp. in a skip, have powder-coated the top and front (to make my own faceplate markings) and wondered about the phono card.
Did you make it fit?
I found the same amp. in a skip, have powder-coated the top and front (to make my own faceplate markings) and wondered about the phono card.
Did you make it fit?
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