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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: What's the advantage? posted by 6AS7_6SN7 on September 28, 2009 at 23:43:08:
Seems a bit wasteful but I suppose the power supply is almost free ;)
You can obtain good performance from toroids running single ended or push pull . Balancing push pull , all that is required is a bypassed CCS in each cathode . For single ended I've used a 50VA 230:9+9 using one of the secondaries as an offset winding . The offset winding is driven by a high impedence DC source such as a choke or ring of two CCS (chipregs are no good) . This can also be used to power the filament , in my case I ran a 6B4G at approx 40mA , the offset being achieved by the 1A filament supply in conjunction with the 25:1 turns ratio . The 50VA toroid could take around 3-4mA before saturating . Alternatively valves with greedier filament such as 2A3 can be catered for by adding a tertiary winding
Al
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- RE: What's the advantage? - Al Noakes 10:49:43 09/29/09 (0)
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