[Patrick Turner]

On Sep 30, 11:47*am, "Ian Iveson"
wrote:
"Ian Bell" wrote:

It likely depends on how close saturation is to 20Hz, *at
the signal level the OPT is likely to encounter*. If you're
willing to use feedback, and the signal is small, you may be
OK. An appropriate filter at the input should make
saturation impossible.

Patrick'll be along in a tick.

That Patrick fella might say "try for as much Lp as possible, and make
sure Fsat at 1kHz clipping level with load of 4x Ra or higher is below
20Hz. "

Sometimes this means you must buy a 10W OPT rated for 10k load and
-1dB at 20Hz - 20kHz.

The use of a genteel little tube like EL84 in triode, or a 6A3 should
give real music with no bad sonics.

Patrick Turner.




Twice the plate load? It *is* the anode load isn't it? 2 to
3 times ra, depending on whether you want power or fidelity
respectively, broadly speaking.

There is a tradition of not caring about head amps...as if
they are add-on extras to the main system. These days, they
quite often *are* the main system.

Ian