Thanks Marcel, seems this is a well worn coat. Active input resistance seems like a great way to cheat the source for BJTs, wanted to do the same for above
They will be fighting each other when they have unequal offset voltages, using separate feedback networks can solve that.
Thanks Marcel, its quite interesting the number of tricks one can try out to achieve similar performance to Pearl3
There are a couple of solid reasons why the above OPA828 phono preamplifier is superior probably even superior to the schematic in first post with no feedback jfets. One could replace the pearl3 front end with this and see how they like it
Pearl3 is in stock, its a deal that's hard to beat
https://diyaudiostore.com/products/pearl-3-phono-preamplifier
https://modushop.biz/site/index.php?route=product/product&product_id=971
https://guides.diyaudio.com/Guide/Pearl+3/28
https://diyaudiostore.com/products/pearl-3-phono-preamplifier
https://modushop.biz/site/index.php?route=product/product&product_id=971
https://guides.diyaudio.com/Guide/Pearl+3/28
Cy-XXI KIT is also in stock, with better freq resp, lower noise and lower price
https://imrad-com-ua.translate.goog..._sl=ru&_x_tr_tl=en&_x_tr_hl=ru&_x_tr_pto=wapp
How we going in https://www.pcbway.com/project/shareproject/Groove_Phono_MM_MC_preamp_90fa1c54.html
Show interest here
Show interest here