High Frequency Boost?

[parrydave]

Hi John,

I read in your other post (Audiophiles forum) that the analogue output from the SB3 were greatly improved by using the Tent XO. Thats got me thinking about this as an analogue only mod. How simple a job would this be? And what would be your recommended route?

Presumably I'd have to put the Tent XO in an external box with suitable power supply. There's no way the Tent could live inside the SB3 and use existing power feeds? Or would this negate benefits?

I am already planning a few other analog mods, including upgraded internal supply caps etc.

Interesting stuff!

[JohnSwenson]

It MIGHT be possible to squeeze a Tent clock into the SB3, they are not very big, it depends on how much space there is between the board and case. Putting a board with a low noise regulator and a Tent clock into the SB3 would be a VERY good thing to do. I think some of the modders already do this. Remember there are two crystals, a 12.288 and a 11.2896. If you just want the improvement on ripped CDs its fine to just replace one and leave the other.

My experience is that doing just this without any other changes will improve the sound quite a bit. Of course upgrading the analog section will be even better.

John S.

[tingtong5]

I'm also considering slaving my DAC clock to the SB3 (removing the onboard 11,28 MHz crystal). However the clock output of the Tent XO in my DAC is 5V. Can I simply use a resistor voltage divider or would thsi screw up the low jitter output of the XO ?

Regards,

Ronald

[Jitterbug]

John mentions elsewhere that he uses low impedance resistors in a divider to do just this 50R & 25R. I'm in the process of doing the same thing - just waiting for my X03 to arrive

[tingtong5]

John mentions elsewhere that he uses low impedance resistors in a divider to do just this 50R & 25R. I'm in the process of doing the same thing - just waiting for my X03 to arrive

Very interesting :-)
So how will you get the master clock to the SB3 then. Using 75 Ohm coax? If so the resistor divider would terminate this coax in an incorrect way (not 75 Ohm) at the DAC.

And by the way , I am also waiting for my 11,28 MHz XO to arrive :P

[Jitterbug]

I use one of Guido's XO-DACs on my DAC so will just run the tent link to that, to keep the clocks in sync. The two clocks may well be overkill but I already had the X0-DAC before I thought of reclocking the SB.

[tingtong5]

I use one of Guido's XO-DACs on my DAC so will just run the tent link to that, to keep the clocks in sync. The two clocks may well be overkill but I already had the X0-DAC before I thought of reclocking the SB.

I see.. I guess this is indeed the easiest and best method of doing it! Still I like to try first using only one clock (saving me quite some money :P).

Let us know how it sounds ! :-)