You are taking offence that I question if you know what EQ is or a phono stage is after posting this:
"Oh yes,don't use any EQ or even any gain! don't be so touchy and I still think Stanton will know,probably forgotten!, more about reproducing mono and stereo than you,just saying they advised a far simpler solution,how many records play mono vertically??"
A good many of us here are aware that most MM (and MI and variable reluctance) cartridges require ~30 dB of gain at 1 kHz to get to line level and equalization to complement the record EQ and convert the velocity response of the mag cartridge to an amplitude response.
All designs are a compromise to optimize the goals of the designer. If I were working for Stanton (or any other cartridge manufacturer) and my boss came to me and said I need a circuit which can be implemented on our existing products by our customers at little cost or effort there is little doubt that I would say just put the channels in parallel. Does it work? Fairly well. Is it optimum? Not really, for the reasons ld outlined.
ld put his coils in series to address the issues he stated in the parallel approach. He is not the first to do that or the only one. The person who provided a 3 mill stylus for my Sonus cartridge is a big proponent of the series connection.
Joe pointed out how the series connection will raise the output impedance of the cartridge and cause capacitive loading of the cables and preamp to be an issue. ld then pointed how he mitigated that issue.
Now my goals.
1. accurate summing of the channels for mono
2. ease of switching from lateral to vertical
3. load on each channel of cartridge the same as the stereo phono stage it was designed for
4. Choice of play back EQ
5. Easy switching from mono to existing stereo phono stage.
6. Ability to switch from left channel, right channel, or the sum when in mono
I think my design addressed all of the above goals.
Am I as smart as the Stanton Engineers? Who knows.
Am I a reasonably competent engineer? Well I hope so. I do have a BSEE and now have for the most part retired after a career of designing RF and analog circuits. I have been an audiophile for most of my life and have designed several amplifiers and preamps for my use.
steve195527 wrote: ld wrote:
steve195527 wrote:....considering the signal quality to start with
Then, you do not know mono.
You are mostly trolling, steve195527. Which is a pity because this thread has some good content IMO.
not trolling at all,but when your friend takes the hump and asks do I know what equalisation is or even a phono stage??doesn't that sound rather childish?And you take the hump because I point out you history with a certain other member and accuse me of trolling,unless of course you regard trolling as somebody not thinking you are 100% correct?seems rather odd