I run my B15 with one of these:
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It's something you might want to consider as well. The WS1 will give your amp a bit of a stronger sound and feel, more presence and punch than a tube rec. and your power transformer will run cooler - well worth the $20 investment. They also have a WZ34 which simulates the sag by dropping the voltage like a 5ar4 tube does, I've got one of each so I have options. Even if you use a tube most of the time they are still handy to have around in case your rectifier tube fails.
...and be sure to stop by the Portaflex club, all you could ever want to know about those amps and more:
http://www.talkbass.com/forum/f15/jess-olivers-legacy-ampeg-portaflex-club-part-10-a-951349/
[Invalid or Expired Link Removed]
It's something you might want to consider as well. The WS1 will give your amp a bit of a stronger sound and feel, more presence and punch than a tube rec. and your power transformer will run cooler - well worth the $20 investment. They also have a WZ34 which simulates the sag by dropping the voltage like a 5ar4 tube does, I've got one of each so I have options. Even if you use a tube most of the time they are still handy to have around in case your rectifier tube fails.
...and be sure to stop by the Portaflex club, all you could ever want to know about those amps and more:
http://www.talkbass.com/forum/f15/jess-olivers-legacy-ampeg-portaflex-club-part-10-a-951349/