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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: Good idea: 5V4 nt posted by mobiasloop on December 13, 2014 at 07:34:56:
I'm not sanguine about using a 5V4. Check the data sheet out. Current capability is 175 mA., which should be enough for the power amp, but may be problematic if ancillary equipment's B+ is to be provided. Another thing to watch out for is the small 1st filter cap. value limit.
A 5AR4, like the 5V4, draws only 2 A. of heater current, but like the 5U4, the type is good for 250 mA. Also, the 1st filter cap. limit is greater than that of a 5U4. Therefore, the 5AR4 is the vacuum rectifier type I'd look at, IF a change was to be made.
If either rectifier with a cathode sleeve is installed, B+ has to be taken from pin 8, not pin 2. Both the 5V4 and the 5AR4 will raise the B+ rail voltage, with the 5AR4 raising it more.
Eli D.
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- RE: Good idea: 5V4 nt - Eli Duttman 13:07:10 12/14/14 (0)
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