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A friend of mine called me up..he had just found out that if your sony doesn't have a phono stage you cannot use your TT..the cheapest stuff I know you can buy ready made is about $50..
I would be wiling to solder something together for him at less cost..
is there something around that works...so NO vishay, not silver teflon caps, no blessed wire from the Andes ... Do we hear sound? yes? then it works!
Just sound from that rock you drag through a vinyl valley..
all input is welcome!
Follow Ups:
..I have looked at the el cheapo..
it is near impossible the get in reallly dirt cheap..the guy is mostly baffled by the amount of time I spend on music (playing,listening..DIY stuff)..but finds it rather amusing nonetheless..
I think I will build a el cheapo for myself once I sort out the whole speaker thing..and the amp..aarrgh.
I would not bother to make a phono preamp that costs less than $50 to make. Why? Because you can buy used phono preamps that will be better for almost no money. It is one thing to be low in money, but why waste your time making 'junk'? A phono stage should be low distortion, low noise, and accurate. It is possible to get something almost right with some of the better IC's out there, but I would try to buy used equipment. I first recommend the old Dyna Pas-3 tube preamp. Had one for years! It's a little soft (hi TIM) and too noisy for many MC cartridges, but it is musical. One big problem with DIY phono stages is the precision of the EQ caps. They should be at least 2% accurate. Another is noise, and yet another is dynamic range. Ticks and pops are very high output, and should not clip the phono stage. The Dyna has good dynamic range, but it has very little output current, so it clips on fast transients, because the second stage cannot properly drive the RIAA network. It has an effective slew rate of around .5V/us. Still, within its limits, (MM cartridge) it can be pretty good.
<0>
I believe I saw a unit in Radio-Shack's catalog for ~$25.
D
Hi there,My good old "El Cheapo Phono Pre" can be dumbed down.... Just use decent Metal Film Resistors, Styren Caps and a OPA2604. You could make taht small enough to fit inside the sony unit, otherwise a simple LM317/337 PSU will do. At that however you may as well tell him to buy a NAD Phonostage....
The difference is not that big....
Later T
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