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jon · Post by **jon** » Mon Dec 30, 2013 3:24 pm

I'm putting together a "parts bin" 5e4a super with some tweaks. I'm wavering on the power tubes should I run:

6973's
7591a's
6v6gt's
6aq5's

The amp will be fixed bias with 370-375vdc on the plates. The OT is 20w @ 9k 8ohms.

Don't worry I'll post pics once the panels arrive from bnp.

Reeltarded · Post by **Reeltarded** » Mon Dec 30, 2013 3:31 pm

I vote 6v6s.

10thTx · Post by **10thTx** » Mon Dec 30, 2013 7:13 pm

I like 6AQ5's but would NOT want them to have over 305v on them.

6V6's sound quite reasonable.

So, you may need to rule those out.

With respect, 10thtx

galtjunk · Post by **galtjunk** » Tue Dec 31, 2013 9:33 am

I have an original with 6v6's and it sounds great.
I think it is a better sounding amp than the 5f4.
I have a friend who wanted more power so I built him a 4 holer using 6v6's.
It sounds great too.

jon · Post by **jon** » Tue Dec 31, 2013 11:46 am

I've built quite a few clones of the 5F4 and 5E4A over the years for people. It is always the one I seem to go back to for some reason. I agree the 5E4a is the best sounding one of the bunch.

matt h · Post by **matt h** » Tue Dec 31, 2013 5:33 pm

(deleted)

jon · Post by **jon** » Tue Dec 31, 2013 5:45 pm

PT came from an RCA 416 movie projector and is rated at 210-240ma at 140V, 6VCT @ 2.5A. Technically speaking I could run the screens at 195-200V and the plates at 385V.

Reeltarded · Post by **Reeltarded** » Tue Dec 31, 2013 5:55 pm

10thTx wrote:
6V6's sound quite reasonable.

So, you may need to rule those out.

With respect, 10thtx

That made my face hurt ,

jon · Post by **jon** » Fri Jan 03, 2014 7:49 pm

And the winner ended up being 6V6's with the option of 7591a's

The Amp Garage

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