What can I build with +/- 60v rails?

[6L6]

Hello!

A buddy of mine gave me a pair of plate amps with very nice transformers in them, they are 49v-0-49v and probably 200-300VA each.

Can an Aleph or some other Papa amp be run on +/- 60v? Or is there something else to consider?

Are there any major disadvantages to this? (other than more expensive capacitors?)

 

[lanchile]

HPA-nxV300 380 watt MOSFET Audio Amplifier Module

I am sorry, I did not see this was pass labs section and you were looking to build one class A amplifier.

 

[6L6]

No problem! It's a neat design... the modules are kinda expensive.

 

[elizard]

How about an Aleph 1.2? Real beast, runs on 60v rails.

I take that back. Just realized how undersized your transformers are for a 1.2

 

[6L6]

I don't think there is enough current capability in the transformers. They are 300va or so.

 

[Roscoe Primrose]

Are they 50-0-50, or are there actually two secondaries that you could run in parallel? 60V or so would be perfect for DeLite....

Or, do they have dual primaries that you could run in series to get 25-0-25?

Roscoe

 

[6L6]

Single 120v primary and 49-0-49 secondary. Not a dual secondary.

DeLite, although interesting, is completely impractical due to hot lightbulbs sticking out the top... Toddler-proof it isn't.

 

[Roscoe Primrose]

DeLite, although interesting, is completely impractical due to hot lightbulbs sticking out the top... Toddler-proof it isn't.

Treat it as an educational opportunity.

DeLite style amps can also be built with resistors on heat sinks, but they don't look as cool...

Roscoe

 

[jazz]

Hi,

How about the CAS-1 or 2?

Joris

 

[Nelson Pass]

Can an Aleph or some other Papa amp be run on +/- 60v? Or is there something else to consider?

There is a version of the F5 Turbo that could do that.

 

[6L6]

YEEHAW!!!!!!!!!






As long as I don't need much more than approximately 500VA total, I know what I will be making!

 

[ramallo]

hehe, I have another donut waiting for........ (45V+45V 1200VA)

 

[Roscoe Primrose]

Don't forget, you can also use those transformers to get a single +60V rail, which ought to work just fine for most of the Zen variations as long as you've got enough heat sinking...

Roscoe

 

[tinitus]

As long as I don't need much more than approximately 500VA total, I know what I will be making!

be prepared for the beast of a hundred fets and monster heatsinks

 

[boywonder]

I'd like to build an F4.......

Not to thread-jack, but I have a similar question.......

I have one of Nelson's toroids that he was giving away at BA2 (he showed up with a truckload of them).

It's got dual 0-115VAC primaries, and dual 45V/6.6A secondaries.

If I wired the primary in series to get 22.5V out of the secondaries, is that too much V for an F4 build? If it requires lots of mods, I'll just find a dual 18V 300-400VA transformer.....

 

[KatieandDad]

60-0-60 is getting quite high for Class A - But still doable with huge heatsinks.

My Aleph 4 runs at 48-0-48 and does get QUITE WARM.

You might be able to produce an Aleph Turbo with 60-0-60V

Might be better to decide what you want to build and sell the traffos and buy the ones that you need.

 

[CanAm Man]

YEEHAW!!!!!!!!!






As long as I don't need much more than approximately 500VA total, I know what I will be making!

Darn it, 6L6 (Jim)........ It appears you've given Papa Pass ANOTHER OPPORTUNITY to taunt us, about the pending F5 Turbo...

(Nine days......but who's counting???? )

 

[Roscoe Primrose]

Any thing in the standard Zen/FirstWatt line, if you use a variac