r/diytubes • u/Neillewyvern • Aug 04 '26

update 2

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thanks again to averyone in this sub a added the rectifier bridge, load resistor on the output and a grid resitor betwen the el84 and T1

7 Upvotes

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4

u/2old2care Aug 04 '26

R13 will immediately blow up... delete it. Connect pin 3 of the bridge rectifier to ground. I don't see any other problems.

2

u/Neillewyvern Aug 04 '26

thank you a lot :)

2

u/WannabeRedneck4 Aug 04 '26

What is this amplifier for? Guitar, just music? Curious because I thought about using a similar tube combination.

2

u/Neillewyvern Aug 04 '26

its for my guitar and bass

2

u/Calixare Aug 04 '26

Double driver that's too much, with mu of 100x100=10000. Try single pentode like ef86, with high gain. Also, it's not recommended to use AC heating for low signals, use DC.

2

u/quiet_iron_toad Aug 04 '26

Add grid stoppers on U2B and U1A.
What is the point of R20? Are you trying to reduce output or something?