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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: OPT for 2A3/300B design posted by masterofdisaster on July 10, 2011 at 19:37:15:
5K is often chosen over 3K for more damping control. For the 300B, many people prefer the 5K option over 3K.. Keep in mind that the 5K load also permits the 45 - which you might not want to try with a 3K load.
I've always been impressed with the Parafeed output stage for extended bass performance... In many cases, you can convert an air gapped transformer into duty as a plate choke - and add the parafeed capacitor and transformer after the fact. I've done with with both my 845 amp and an 811A prototype and I did notice in each case that the bass performance was more impactful and controlled.
I have a 6W 845 amp - fixed bias - 6.6K load, front end is IT coupled. I can piss off neighbors will all my 6W in my urban neighborhood on 98dB eff Klipsch RF-3s. I reckon with your K-horns that you would be more than happy with a 300B... After all, the prices on 300B vs. quality 2A3 are not that far away from each other.
I'd def. do fixed bias too....
-- Jim
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Follow Ups
- RE: OPT for 2A3/300B design - Jim Doyle 20:42:48 07/10/11 (2)
- RE: OPT for 2A3/300B design - GTCharlie 20:32:48 07/11/11 (1)
- RE: OPT for 2A3/300B design - masterofdisaster 20:13:17 07/13/11 (0)
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