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-   -   Factory Built F4 -double transformers (https://www.diyaudio.com/forums/pass-labs/232909-factory-built-f4-double-transformers.html)

6L6 27th March 2013 03:59 PM

I'm thinking ImPasse -- I have a bunch of really premium 6SL7 and 6DJ8 laying around unused, as well as a suitable power transformer, etc... :cool:

Manolo47 -- what are you using as a preamp into your F4?

Mr. dB 27th March 2013 05:14 PM

Quote:

Originally Posted by Zen Mod (https://www.diyaudio.com/forums/pass-labs/232909-factory-built-f4-double-transformers-post3429648.html#post3429648)
two xformers in one C bank ?

hardly any improvement

put second Graetz + C bank , and make double mono

then you'll have improvement


ECO-S1EP153BA Panasonic Electronic Components | P6890-ND | DigiKey


but - be aware that DC voltage will rise slightly (less sag due to less load per xformer) , so with 25Vdc caps , you're there , in danger zone

Whatsa "Graetz"?

WalterW 27th March 2013 06:27 PM

hahaha, Google it... it's a rectifier bridge....don't tell ZM :p

Zen Mod 27th March 2013 07:57 PM

Quote:

Originally Posted by buzzforb (https://www.diyaudio.com/forums/pass-labs/232909-factory-built-f4-double-transformers-post3429844.html#post3429844)
Crank it up and add opa and you have something special. Even Mr ZM has funny per that would be great. Great customer device as well:devilr:

ZM likee OPA only as low level device , when space is of premium importance

in all other cases , ZM likee something as Brynhildr ( read - newest toy ..... accent is always on newest :rofl: )

buzzforb 27th March 2013 08:24 PM

Of course newest is best. I was referring to Pumpkin as funny pre.

Zen Mod 27th March 2013 08:35 PM

yeah

:Pumpkin: will drive F4 ;

two of them :rofl:

buzzforb 27th March 2013 08:38 PM

Real pre will drive 4.:tongue:

Zen Mod 27th March 2013 11:31 PM

well - with output swing of 70Vpp , pick your poison ......

:clown:

buzzforb 27th March 2013 11:39 PM

Why the name....Brynhildr?

Zen Mod 27th March 2013 11:43 PM

1 Attachment(s)
70Vpp is for :Pumpkin:

Brynhildr is ........ wakoo ZM's mind :devilr:


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