Two questions regarding the Porta Tube.
1. Has anyone seen anything indicating whether it benefits from any 'burn in' period and, if so, what was the recommended 'burn in' time?
2. For those that have experienced it, can you make a comment on whether, like some full size tube amps, it appears to improve in SQ after a warm up period?
Looking forward to any genuine replies (Please don't turn this into a diversion about whether 'burn in' or 'warm up' are valid concepts or...