The pics.
We want to see the goods. Where is the pic of the top? Have you listened on main system more?
Iam more than happy to talkabout it in the BA3 thread.
ok, lets stick to that
Nelson appears to sum top andbottomportion of PP Fe. Dont know why, and if you did the same to F5, you woyld find they are back to being similar again, in this respect.
maybe because in BA-3 FE the signal is summed into one, like a preamp (F5 jfets are not)
ok, lets stick to that
maybe because in BA-3 FE the signal is summed into one, like a preamp (F5 jfets are not)
Tinitus,
Go to the BA3 thread. Look up Generg. He specifically addresses the issue after building his. You are probably right and I am wrong. What you say makes sense. Shows my ignorance. I concede.
The same gain like Botte between x8 and x9... for the unbalanced version
Bas,
On my end, it is saying the video is private.
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Tinitus,
BA3 thread
thanks for that redirect
seems the guys worked it out, in the end, 30db, and what the boss said (Nelson)
cheers
Fixed. It is now public.Bas,
On my end, it is saying the video is private.
Basman,
WRT the noise you're experiencing... could it be your smallish choke is hitting saturation? Cuz your first cap is only 2uF (from memory) the PS behaves like a choke-in filter. Loading thoose 150uF pulls lots of current...
Perhaps you can experiment with a resistor of equal resistance in parallel with the choke to see what happen at half the power? Or replace it altogether
WRT the noise you're experiencing... could it be your smallish choke is hitting saturation? Cuz your first cap is only 2uF (from memory) the PS behaves like a choke-in filter. Loading thoose 150uF pulls lots of current...
Perhaps you can experiment with a resistor of equal resistance in parallel with the choke to see what happen at half the power? Or replace it altogether
Choke in general? Or the ones I have?they suck
I'll try Salas's suggestion first. Replace grid stopper carbon film with metal film.
... first cap is only 2uF (from memory) .......
ehh, with that small smoothing cap, are you not feeding your choke with ac ripple
I'll try withoutOK, but grid stoppers should ideally be neither magnetic nor reactive.
Maybe it's not the linestage at all. Since I can't hear the noise with headphones or on my computer room system.
I've been used to playing directly from my DAC to power amp. (Volume control digitally via my Squeezebox Touch)
Perhaps the gain of the preamp is now making the DAC (6N6P output stage) white noise audible?
ehh, with that small smoothing cap, are you not feeding your choke with ac ripple
An estimate:
An externally hosted image should be here but it was not working when we last tested it.
without the 2uF:
An externally hosted image should be here but it was not working when we last tested it.
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Maybe it's not the linestage at all. Since I can't hear the noise with headphones or on my computer room system.
I've been used to playing directly from my DAC to power amp. (Volume control digitally via my Squeezebox Touch)
Perhaps the gain of the preamp is now making the DAC (6N6P output stage) white noise audible?
Very likely. Not getting it on headphones is a strong hint it may be a push to source hiss. If you can FFT the chain rings you would see exactly. Are the big system's speakers highish sensitivity or horn even? Multiways with dedicated HF units?
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