I looked again, yes...the height is 6cm. Sorry.
But my 4x6 pcb will not fit standing upright with covers on. It is just slightly too large...maybe less than a mm. Perhaps the pcb could be trimmed or sanded a little. But yes, height is 6cm, not 4cm. I was mistaken.
But my 4x6 pcb will not fit standing upright with covers on. It is just slightly too large...maybe less than a mm. Perhaps the pcb could be trimmed or sanded a little. But yes, height is 6cm, not 4cm. I was mistaken.
I have a 600R Beyerdynamic T1, and it's doing very well with the F5X-HA (which has very similar sound characteristics with the F5-HA).
The key differences between F5-HA and F5X-HA, apart from obviously more complexity and power consumption, are
-- double the output voltage swing for same rail voltages
-- double the (differential) input impedance
-- double the output impedance for same bias (as seen by the phone)
-- much much reduced even harmonics when using perfectly matched (left to right) FETs
Patrick
-- double the output voltage swing for same rail voltages
-- double the (differential) input impedance
-- double the output impedance for same bias (as seen by the phone)
-- much much reduced even harmonics when using perfectly matched (left to right) FETs
Patrick
A few more points to remeber :
-- effective useable voltage ~ Rail-4V.
-- heat dissipation for a F5X-HA ~ doubles, so heat sinks to suit.
-- heat dissipation per TO220 < 4W
-- lower dissipation => less DC drift.
Patrick
-- effective useable voltage ~ Rail-4V.
-- heat dissipation for a F5X-HA ~ doubles, so heat sinks to suit.
-- heat dissipation per TO220 < 4W
-- lower dissipation => less DC drift.
Patrick
Thats good EUVL. see x, you should listen and buy the PCB or kit or whatever is being sold if you want 'that improvement'.
> you should buy the PCB or kit or whatever is being sold if you want 'that improvement'
The vero board (pdf file in Post #1) is free and anyone can build in no time, as the two recent examples have shown.
No need to buy anything.
http://www.diyaudio.com/forums/atta...561d1427197670-f5-headamp-f5-headamp-vero.pdf
Patrick
The vero board (pdf file in Post #1) is free and anyone can build in no time, as the two recent examples have shown.
No need to buy anything.
http://www.diyaudio.com/forums/atta...561d1427197670-f5-headamp-f5-headamp-vero.pdf
Patrick
> So a F5X-HA with 11v rails can swing approx same as a F5-HA with 18v Rails?
In theory yes.
Patrick
In theory yes.
Patrick
All the same, if some one needs to match the 'improvement' in sq, i guess they would need to buy.
Also, if only vero layout is shared, for a modern, common diyer, who can only build with1$ PCBs, there appears to be no option, other than making pcbs from the 'vero equivalent' layout posted by other dime-a-dozen layouters🙂.
signing out,
prasi
> the 'vero equivalent' layout
Cannot be further away from the Vero layout.
People who understand PCB layouts of high bandwidth circuits would know.
Patrick
Cannot be further away from the Vero layout.
People who understand PCB layouts of high bandwidth circuits would know.
Patrick
Prasi,
Thanks for the layout! Looks great - these will help me make it look a little cleaner than my veroboard. Appreciate you taking the time to make it.
Thanks for the layout! Looks great - these will help me make it look a little cleaner than my veroboard. Appreciate you taking the time to make it.
I would argue that the veroboard layout is actually "better", although a little bigger. Resistors are kept closer to mosfet pins, traces are generally shorter on the veroboard layout. But having a pcb might be easier for some people so it's a nice option.