Jason's Phase Linear P3600

Got correct power supply voltages accross all op-amps, +14.2, -14.1 Missing some gain. Max out is 450mv, should be north of 2 volts..
 
FR curve...


Nav, Joe, or Jer, to fix this response I would have to take C106,206 to .68uf, correct?
 

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  • PL 3600 schemo Pg 1.jpg
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  • PL 3600 schemo Pg 2.jpg
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  • Jase's 3600 FR-Table.jpg
    Jase's 3600 FR-Table.jpg
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Last edited:
Minimum input level for rated output is 150mv, I only had 40mv. Rated output is now 2.1 volts... Distortion sweep coming up...
 
Everything is groovy except for the bass response....it would be nice to have the FR curves match the amp. The amp will not do 10hz if the pre-amp won't....
 
laatsch55 said:
Minimum input level for rated output is 150mv, I only had 40mv. Rated output is now 2.1 volts... Distortion sweep coming up...
Click to expand...

Did you swap out the caps? What was loading down the input voltage to the opamp?
 
laatsch55 said:
Everything is groovy except for the bass response....it would be nice to have the FR curves match the amp. The amp will not do 10hz if the pre-amp won't....
Click to expand...

What did the 3300 II do at the low end? If you could flatten our the bottom end that be would awsome. I'm assuming that's why you were asking about the cap value change.
 
laatsch55 said:
FR curve...


Nav, Joe, or Jer, to fix this response I would have to take C106,206 to .68uf, correct?
Click to expand...

First had to flip the schematic over, was getting a stiff neck :-)

Yes C106 at least 0.33uF and C107 to 47uF with a 0.15uF film bypass across it as well.

Those appear to be the frequency response bottlenecks.
 
:angry1::stfu::stfu: both of ya!! THD & N coming up. Things look great if we could get the low end fixed up. Yes Nav, that's the one. :-o:-o Love ya ....both...
 

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  • Jase's 3600 THD & N Graph.jpg
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  • Jase's 3600 SNR and crosstalk.jpg
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Ah Joe thanks!! I'll get right on that!! 22's to 47's with a bypass and thge .15 to a .33 could the .33 be mylar, may not have a .33 in poly.?
 
laatsch55 said:
:angry1::stfu::stfu: both of ya!! THD & N coming up. Things look great if we could get the low end fixed up. Yes Nav, that's the one. :-o:-o Love ya ....both...
Click to expand...

Dyam, the PL700 power amp has better signal to noise than the pre does :-)
 
Gepetto said:
Dyam, the PL700 power amp has better signal to noise than the pre does :-)
Click to expand...


Yep, wondered if you were going to notice that, but of course you would. Now you can puff up and go sideways Joe. out SNR'd a pre!!
 
laatsch55 said:
Ah Joe thanks!! I'll get right on that!! 22's to 47's with a bypass and thge .15 to a .33 could the .33 be mylar, may not have a .33 in poly.?
Click to expand...

Anything north of 0.33 up to 1uF in the C106 location should do Lee.
 
Hookay, gimme 20 min and I;ll rerun the FR. This is the fun stuff!!
 
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