RCA RS177H just dosen't sound right! Caps? - Page 2 - diyAudio
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Old 6th May 2012, 02:54 PM   #11
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a 5Y3 will give you more B+ voltage. A 5AR4 will give you even more.
Perhaps the 5AS4 tube wasn't delivering enough voltage.
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Old 7th May 2012, 03:30 AM   #12
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Quote:
Originally Posted by Frank Berry View Post
a 5Y3 will give you more B+ voltage.
Perhaps. But, at 125mA maximum with cap input, it doesn't have the current capability for four EL84s at full power.
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Old 7th May 2012, 04:17 PM   #13
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Quote:
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Perhaps. But, at 125mA maximum with cap input, it doesn't have the current capability for four EL84s at full power.
You are absolutely correct. I wasn't thinking stereo. For some reason, I was thinking that this is a mono amp.
Scratch the 5Y3. 5AR4 would be a better choice.
Another advantage, the 5AR4 draws much less filament current.
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Old 8th May 2012, 02:54 AM   #14
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So the 5Ar4 would be a better choice than the 5U4?
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Old 8th May 2012, 03:09 PM   #15
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The 5AR4 has a much lower voltage drop than the 5U4.
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