The op amp circuit uses a tl071 connected as a voltage follower.
Ceramic cartridge amplifier.
And some players started using magnetic cartridges in the 1960 s.
Home preamplifier and tone preamp stage for ceramic phono cartridge.
Very old tube amplifiers 50 years old have had ceramic cartridge input which is very high input and accepts around 100mv signal level.
The last ceramic cartridge i had in my system was back in the sixties.
Magnetic cartridges cannot be used or have a much shorter lifespan in damp climes as condensation can erode the metal parts of the pickup.
The transition from ceramic to magnetic cartridge use generally took place during the 1970 s.
These two circuits have been requested for a violin pickup but could equally well suit a ceramic or crystal pickup.
I recently obtained two ceramic.
Mm s will typically be loaded with capacitive loading in the pf range.
Ceramic cartridge phono pre amp.
Free shipping on your first order shipped by amazon.
Get it as soon as fri sep 18.
Mm moving magnet cartridges are designed to play into 47k ohms or higher input impedance.
The type cartridge between it and my amplifier input which at the time was the high impedance grid circuit iirc of a 6j5 audio triode.
My design concept was to produce a circuit that would be compatible with the widest range of cartridges using the most commonly available and lowest.
It can run from a battery supply of 9v.
Vintage audio equipment may need the ceramic cartridge s higher voltage output.
Ceramic cartridges are used in environments which are easily disturbed and require the needle to stay in the groove.
Ceramic cartridges of capacitance 800 pf to 12 000 pf with output voltages up to 900 mv can be connected making it a very versatile circuit for a large range of cartridges currently available.
I upgraded this to a moving magnet and this type has been my prefered choice ever since.
But the nostalgic type players of today persist in using ceramic cartridges.
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