no bass makes pedro a whiny boy
 

Hi all,

Yesterday, I swapped out the 6J5 cathode follower that is my line stage for a push-pull stage based on a Schmidt phase splitter that drives cheap Edcor line transformers(see below and here) .

Well, it worked - sort of - but there is literally no bass. I bought the Edcors to try something like this as a proof of concept. Yes, they're cheap, but they're only driving my amp. Other than the transformers, is there anything that I might have done to cause this?

Could it be the highish Rp of the 6SN7? Would a 6BL7 be a better choice?

thx,

pete



http://home.ntelos.net/~pgudaitis/htdocs/6sn7_pp_ls.gif

No wonder.

1) lose the current source
2) feed it with a proper phase splitter
3) use a decent transformer. Crap tranny = crap sound

Hi,

Cheers,

Yes - wonder - stated specs: 20-30k +/-.5dB ...sounded like a 1st order x-over had been inserted@~200Hz

Current sink needed (see thread below).

Proper phase splitter (see same thread below).

thanks for the input

compact amp thread



ps - got some semblance of bass by upping current sink to 20mA.


pg