Pictures of your diy Pass amplifier

[Marra]

Thanks Walter unfortunately neither RS or Farnell have anything like those on there sites.
Really nice build by the way.

[Bonsai]

Originally Posted by WalterW

And some more pic's of the finished F5......

The last foto is my next project: the F5 Turbo v2 with bigger Austerlitz KS300.6 heatsinks, 2sj201 / 2sk1530's and I want to do the EUVL trick with the extra 5 Ohms resistor in the 2SJ74's source. Also truing to build the chassis myself with the heatsinks I have. So again a lot of work to come...

Thanks again for all your knowledge

Wow, that is a great build! Congrats

[jacco vermeulen]

Originally Posted by WalterW

dickbest

Dick is a fun guy.
In the early days of his shop, he told me I offered way too much for his parts, so he charged me half.

(excellent looking project, nice to see the babies nested, and so quick)

[bcmbob]

Originally Posted by WalterW

Hi Bob,

...........
But I'm planning on building new speakers myself, .............

Cheers, Walter

Since you are going to build, let me suggest you take a look at the "Sunflowers". They are premium output devices at a very reasonable cost. I've built around fifteen different designs over thirty years and I most likely will stop with these.

[WalterW]

You're correct AudioSan! 3U300 with alu backplate and 10mm frontplate... Just enough cooling for a F5.
Heatsinks get around 48 degrees Celsius at 1.3 Ampere bias.
I tried to bias them at 1.75 Ampere each, but that was too much for the heatsinks...

[WalterW]

Thanks Bob, done some reading, I like the Sunflowers... but they are way to big for my livingroom, the WAF is too low
I need some small high quality speakers...

[bcmbob]

I had the same problem several years ago, so I traded my WAF in for a pair of Kliscphorns. Seems to have worked out just fine.

Wont go off topic any more after this, but the Overnight Sensation have a great reputation. Same designer.

[omishra]

I built this Pass F5 turbo V2 for a friend, biased 0.55A/device on 33V rail. Caps are 4 X 15000µF /rail making total 120,000µF/channel . Toroidal trafo 4 X 24-0 secondaries for transformer making total 1KVA and PCB designed by me for 15 people in Indian forum GB.
Aluminum box is handmade using hacksaw, power drill and set of files; except anodizing.

image913h.jpg image918r.jpg image919s.jpg

More coming in F5 Turbo builder's thread.

[R-K Rønningstad]

Originally Posted by omishra

I built this Pass F5 turbo V2 for a friend, biased 0.55A/device on 33V rail. Caps are 4 X 15000µF /rail making total 120,000µF/channel . Toroidal trafo 4 X 24-0 secondaries for transformer making total 1KVA and PCB designed by me for 15 people in Indian forum GB.
Aluminum box is handmade using hacksaw, power drill and set of files; except anodizing.

Attachment 330517 Attachment 330518 Attachment 330519

More coming in F5 Turbo builder's thread.

Is the mains transformer located underneath the large capacitors' PCB?

[omishra]

Originally Posted by R-K Rønningstad

Is the mains transformer located underneath the large capacitors' PCB?

Yes, those power filter PCBs are elevated above transformer. There is 3/4" gap between transformer and PCBs.