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
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
An externally hosted image should be here but it was not working when we last tested it.
No wonder.
1) lose the current source
2) feed it with a proper phase splitter
3) use a decent transformer. Crap tranny = crap sound
1) lose the current source
2) feed it with a proper phase splitter
3) use a decent transformer. Crap tranny = crap sound
Geek said:
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
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