Its nearly alive...

[Jye]

Hi everyone,

All I have to do on the weekend is connect the power supply and finish of the back plate. I will post some pics of the inside and how it sounds then.

Cheers
Jye

 

[Jye]

The back (bit of a poor pic)

 

[Jye]

one more

 

[Jye]

and the pic

 

[Jye]

.

 

[officeboy]

That’s very nice looking, hope it sounds as good.

The feet are very interesting, are they drawer handles cut in 1/2?

 

[Jye]

The feet are very interesting, are they drawer handles cut in 1/2?

Thanks officeboy

They are hooks turned upsidedown, I picked them up from Bunnings (a Australian hardware store).

 

[GregGC]

Very clever! Like it.

 

[matjans]

i doubt whether you really need that biig heatsink (doesn't hurt though )

 

[Jye]

Its a bit of an over kill , but it will allow me to add more channels at a later date.

 

[Jye]

Well here it is, the P/S got connected on the weekend with only the small problem of me using fast blow instead of slow blow fuses (that was a frustrating half an hour ) Turning it on there are no pops or crackling and with no humming at all

I have to say this was a well worth while project, and in performance it beats the hell out of my Sony amp, especially in the lower frequencies

 

[Jye]

.

 

[soundNERD]

what are all of those chips between the 2 transformers?

 

[chris ma]

what are all of those chips between the 2 transformers?

The process the A/C and turn it into D/C
Chris

 

[li_gangyi]

in short...a discreet rectifier bridge...he probably used HexFred's or something...

 

[Upupa Epops]

Win against Sony amps are not problem - they are crazy . But crazy too is to see this approximately 300 VA trafos without any protection on DC side - it is " small handgranat " .

 

[sandro600]

Win against Sony amps are not problem - they are crazy . But crazy too is to see this approximately 300 VA trafos without any protection on DC side - it is " small handgranat

could you elaborate on this for us Upupa ?

Is an 160 VA power supply that is often recommended for GC
just a mere stun grenade by comparison ?

What sort of protection on the DC side do you recommend ?

Cheers

 

[elizard]

Win against Sony amps are not problem - they are crazy . But crazy too is to see this approximately 300 VA trafos without any protection on DC side - it is " small handgranat " .

Most people who built gainclones (me included) have no protection on the DC side.


Those transformers looked quite beefy at first sight! (pictures can decieve quite easily!) and i was gonna comment on it, but 300VA is not crazy huge. Still, plenty enough for a GC.

Good job by the way.

 

[Nuuk]

I would be more concerend about the signal carrying wires lying on top of a transformer and then passing immediately underneath all those diodes!

 

[carlosfm]

I would be more concerend about the signal carrying wires lying on top of a transformer and then passing immediately underneath all those diodes!

And it seams they are not shielded cables.
An L-shaped aluminium bar at the back, near the chips would be nice.
And it would hold the volume pot, with a tube extension to the front.