Quote:
Originally Posted by FloridaBoy
I *think* the PSE amps are directly heated rectifiers only. Analog? Straitwire?
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They can run either directly or indirectly-heated rectifiers. The noise floor is slightly higher with indirect. I run direct ones nearly all of the time, but did test out my indirect rectifiers, as noted earlier.
All of my 274B / 5U4G type rectifiers sound the same to my ears too. I must have 7 or 8 of them. I use them interchangeably in my amps, selecting one over another solely for aesthetic reasons. I like big rectifiers when I run big power tubes and use smaller ones with smaller power tubes.
The old vintage "used but still good" ones that I picked up for $5-$10 each sound the same as more highly sought-after ones which sell for $100+.