Has anyone done an F5 with a 12 vdc power supply?

[gcb34]

I want to be sure my amp is 2 wpc. Will 12 volts do that for me?

 

[seanvn]

That's an F6 on that one.

 

[h_a]

Well, I wouldn't go lower than 12 V; you might also think of lowering the bias current if you require your amp to dissipate less heat.

Hannes

 

[juma]

I want to be sure my amp is 2 wpc. Will 12 volts do that for me?

12V wouldn't be feasible for big HEXFETs used in standard F5 (parasitic capacitances play crazy at such a low Vds).
I did try the low-power version of F5 and the best way to do it (IMO) with +/-12V is to use two pairs of 2sk2013/2sj313 per channel (buzzforb and Zhou Fang have them for sale) as output devices, biased at 400mA per MOSFET.
I routinely omit protection circuit (Q5, Q6) but if you intend to keep it, R17-R20 should be recalculated (F5 manual explains how).

 

[6L6]

If I may ask, why do you want it to be exactly 2 watt output?