How stupid is this idea (P-P Phono)?

[mashaffer]

The context of this idea is a dedicated mono phonograph system using a push pull amplifier. The idea is to combine the phase splitter with the initial phono preamp stage. The idea is illustrated here using pentodes for high gain but one could of course use triodes or some sort of totem pole of triodes to reduce noise.

 

[piano3]

Can't see your images. A phono cartridge is already a balanced device. Why would you need a phase splitter?

 

[mashaffer]

I have never seen a turntable with balanced outputs before. Are you suggesting that one could rewire the TT to have a balanced connection to the amp?

The circuit pictured is a LTP with the RIAA network wired between the inverting and non-inverting outputs.

 

[mashaffer]

It is quite possible that this a "Just because you can doesn't mean you should" situation.

 

[leadbelly]

1) I can't see your pictures either.

2) Balanced TT and balanced preamp discussed here countless times.

3) A single ended RIAA network wired between PI outputs won't work.

 

[mashaffer]

BTW, there was some extraneous bits in there that came from cutting from another schematic and the RIAA values were not recalculated. This example of 12AT7 cascode with 12AX7 second stage cleans that up a bit.



Of course at this point we have lost any real simplification.

 

[mashaffer]

1) I can't see your pictures either.

2) Balanced TT and balanced preamp discussed here countless times.

3) A single ended RIAA network wired between PI outputs won't work.

Thanks will try some more searching.

 

[scott wurcer]

I have never seen a turntable with balanced outputs before. Are you suggesting that one could rewire the TT to have a balanced connection to the amp?

Very easy with most TT's. I did mine in 5min. People are scared off because technically it voids the warrantee in most cases.