Rosco65 |
04-11-2017 09:44 AM |
Quote:
Originally Posted by Analog Addict
(Post 841201)
That question was asked in that other audio forum, and Dennis told me that it was that you're still retaining the sound of the 45 tube, while a 2A3 amp, despite being two 45's in the same bottle, sounds different. I also have a 2A3 amp, and it's just not as sweet as a 45 amp or the PSE 45 amp. Kinda makes me wonder what a PSE 71-A amp would sound like?...:scratch2:
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I've never heard a PSE 45 amp but had a direct-couple 45 amp (Rankin Bugle circuit) about 20 years ago. I loved that amp into a pair of DIY 94 dB Cabasse two-ways, though they did run out of steam a little early with only 1.5 watts.
One of my current amps is a 421A SET. The 421A/5998 is a IDHT that is essentially two tubes in one bottle. I use a single tube powering both channels putting out about 4-4.5 wpc. electrically it is a bit like a 2A3 but sounds much closer to a 45 in character.
This is a 6SL7 > 421A amp that is really easy to drive (0.5v for full power), is super quiet and has great bass with Hashimoto output transformers. I would really like to hear it in a head-to-head with a PSE 45 amp. Unfortunately, PSE 45's are as rare as hen's teeth.
That being said, I wouldn't recommend designing around the 421A. It is no longer in production and the headphone gys have driven up the price of tubes. However, with only three tubes per amp (5Y4GT, 6SL7GT, 5998/421A) the total tube cost is less than some rectifier tubes.
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