[smeggy]

yeah, plain old AC from a rat shack transfo

Runs lubberly too. Now they just increased our hours to 10 a day plus Saturdays and two hours a day in traffic.... Bleh, I needed something to keep me sane.

Well dogpoo! I was just looking at the prices for them thar toobs... erm, I'll stick with what I have for now

 

[looser101]

Quote:

Originally Posted by smeggy /img/forum/go_quote.gif Well dogpoo! I was just looking at the prices for them thar toobs... erm, I'll stick with what I have for now

You don't need the DR's just get some Sovtek 6H30s (and a bigger transformer

). Looking good!

 

[smeggy]

How much bigger we talkin'?

Pair of supertubes about $100+

 

[holland]

sovtek 6h30 ~$30 each.
EH 6h30 ~$35 each.

 

[looser101]

2A @ 6.3VAC
or
1A @ 12.6VAC

 

[sachu]

I would suggest a bigger transformer smeggy....like at least 4A @6.3VAC.

You need to run that delay board as well. It is very useful i tell you.

 

[digger945]

I bought my Sovtek 6h30's for $25 each on ebay, and used the live search discount to make it about $85 for a quad shipped back last year.
I am currently powering the heaters on the two tubes in the EHHA boards with a 1800mA Radio Shack wallwort. Got it on sale for $1.97.

 

[smeggy]

I keep forgetting I have a honking big variable output transformer I bought for my T-amp. Perfect!

Hmm, I'll look into the tubes. Are they bigger than the teeny things that come with it?

 

[dBel84]

roughly the same diameter but twice the length ..dB

edit - you could use a switcher smeggy

 

[smeggy]

Cool, I don't wanna redrill the tube holes

What's a switcher?

I just went down to look at my transformer and it's a 2 amp 1-12V DC regulated supply. Dunno if that'd do the trick with those tubes.

 

[dBel84]

"Heater... 6.3V, 0.9A (.825 nominal spec)"

so your 2A tranny will just do the trick if run in series at 6.3V. If you are running them in parallel then you have some headroom.

I switcher is a switching supply (DC) which are usually used for laptops, hard drives etc - but this is no longer relevant

..dB

 

[smeggy]

Ah, switching power supply! I get ya

Thanks, the PSU only hits 6 or 12v, not 6.3 etc. Hopefully it won't matter too much.

 

[smeggy]

So I've secured a pair of EH 6h30pi golds for $30 and I also read that the 6n6p is essentially the same tube, any thoughts? I have a bunch of those here if it would work the same with my big transformer.

Also, trying to follow to many threads I lose track of what's what. So is there a way to increase the bass presence (fullness) by adjusting feedback or changing resistors with the EHHA? I'm looking for a slightly thicker, more solid sound. The bass is nice and deep but feels less full than the beta and if I can find a way to add mass to the sound I'd be extremely happy.

 

[looser101]

6N6P should work but it's at it's low voltage limit. Doesn't hurt to try. 6H30 is a bit better suited for lower voltages.

For reference

 

[dBel84]

Smeggy, for OL gain try the following

remove resistors R22 and R23 - give that a long listen, then replace them with 10K ( or anything above 10K but aim for 10K ) finally try 300K and see which sound sig you like the most. this will give you extremes of OL NFB vs stock recommendations ( 33K )

..dB