The high octane phono preamp

Ok have built and listened to this thing for about 2 hours. All comments are based on a DL103R into cinemag SUT then into high octane un-enclosed. Good news is that after about 15-20 min I stopped being critical and was tapping foot and singing along. Ivor is right this is a very good sign for sound quality. I do notice the things others have heard with the bass and treble. I will be trying some of the mods i've read about to correct these issues.
Question: using an MC as source does the capacitance at the input matter? I can't seem to here a difference between any setting. If this is true could I not replace the capacitors with different value loading resistors for the MC cart?
I here very low level of hum coming from the sub but won't worry about that until after I get it in a shielded enclosure.
Great preamp so far. Current pre is a bottlehead with the CCS upgrade. Definitely sounds different.
 
If I remember correctly, that cap shapes the highest frequency roll-off, so more rounds the edges while less introduces overshoot. The circuit should work though.

If you have 5.6pF at hand, why not simply add another 5.6pF in parallel?

the transients will become deformed with parallel capacitors.

We hear the time and level shifts as hf dirt.

this is due to coupling and overall LCR limits of each cap being fully engaged through the given transient expression.

some mistake it for signal.

single best cap is the way to go.

Realistically, this is why we never use paralleled capacitors in a high voltage and high wattage RF power line buffer, or filter, as the result is predictable: fire.
 
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the transients will become deformed with parallel capacitors.

We hear the time and level shifts as hf dirt.

this is due to coupling and overall LCR limits of each cap being fully engaged through the given transient expression.

some mistake it for signal.

single best cap is the way to go.

Realistically, this is why we never use paralleled capacitors in a high voltage and high wattage RF power line buffer, or filter, as the result is predictable: fire.

Sorry this is BS. In an audio amp paralleling 2 5.6pF caps to get approx the desired value has no downsides. There is no way parallel caps will deform the transients. You need to read some textbooks on paralleling caps.

Also, paralleling caps is done in RF work. Good decoupling requires it and it does not result in fire as you suggest. I know because I worked commercially for a time in RF communications.
 
In theory somewhere in the GHz those 5.6pF caps are resonating, if they are not fully damped at that point by parasitics, but that is way waaaaaay under the BJT's transition time, they basically just act like rocks at that frequency. Decoupling capacitors are another story.