Have you removed the bypass caps and/or GNFB already?

--
Sander deWaal
"SOA of a KT88? Sufficient."

The Devil said:

Have you removed the bypass caps and/or GNFB already?

Yes. I didn't have time to do it last weekend. I performed the surgery
yesterday morning. I don't like the results.

I *so* told you to do it the weekend before this, when some planets (
I forgot which ones, note, as I modified my ouia board into an 11
dimension chessboard) were aligned.

Anyway, the next opportunity will be 25 sept. 2017, according to my
Fraud and Snake Oil Almanac. Keep that in mind, note.

I'll be reversing the mod
during the week, when I have time. I think it's likely the output
impedance is too high, so I'll probably just reconnect the feedback
loop and see if things improve, leaving the decoupling caps off.

Removing the caps rises the Ri of the output tubes, while the
impedance of the speaker reflects back more into the amp.
That's why sometimes removing the GNFB loop is helpful as well.
Apparently, the Maggies are flatliners, they benefited enormously from
this mod.

You still have 2 other options: either reconnect the loop, or put the
caps back in there and keep the loop removed.

--
Sander deWaal
"SOA of a KT88? Sufficient."