Bride of Zen on a shoestring

[trigon]

Re: a couple of questions...

Peter,

I'm starting to gather parts for a BoSoZ, and I'm interested in your use of relays for signal switching. Any recommendations from relays you've tried?

Thanks,

Ren

Or even the schematic for relays PCB for signal switching????

Trigon

 

[Peter Daniel]

I don't have a schematic, only artwork which I posted earlier. It's pretty easy and you can figure it out. Here is a picture from my other preamp with similar relay switching. I'm switching both ground and signal. Recently I've read on Dynaudio preamp, and they have all the relays active all the time, except for the one which is switching the source. It seems like even better idea.

I pick my relays on sale, and always look for quality ones. Those I've seen in FM Accoustics equipment and since they Swiss made I thought they must be good.

The copper plate was a piece of scrap I had. Since the casing for preamp was done out of 1/16" sheet metal I wanted to reinforce the bottom were the transformer was mounted . It also provides the shielding for equipment which might be located below.

Anybody who wants to see my preamp which wasn't done "on a shoestring" can have a look here: http://www.diyaudio.com/forums/showthread.php?s=&threadid=3629&highlight=son+of+dork;)

 

[trigon]

Thank you Peter.


Trigon.

 

[AMPMAN]

single to balanced

ok i'll try again ,does anyone know how to get from rca plug to +/- input plus ground of one channel of a balanced preamp

 

[Peter Daniel]

Connect RCA plug to positive input on balanced BOZ, ground the negative input. You will have balanced signal on the output.

 

[jleaman]

what about mine


since i am building a aleph balanced pre amp the 1.7

will this work..


Input rca's ( from cd player.. )
out put to alephs Balanced plugs
out put to xover for subs then to amps via rca out..

will the amps be in balanced mode even though the cd player is rca non balanced in..

 

[jleaman]

Hey potter do you know any one that has build the aleph p 1.7 preamp and used kristians boards.. im having porblems designing a board for the psu and ect things..

can you help...
i may trade you a pcb laout for a some wet relays HIN HInt eheh

j'

 

[Peter Daniel]

Here is a layout. Just use positive side of power supply http://www.passdiy.com/pdf/balzenpre.pdf BBOZ and P1.7 are using very similar supply.

You preamp will work balanced with RCA input. So how we arrange relays shipping?

 

[jleaman]

Thanks how many do you want..

 

[jleaman]

what d you mean buy this..


Just use positive side of power supply.......... i dont get it...?

 

[Peter Daniel]

BOZ is using +/-60v supply, P1.7 only +60V.

6 would be nice

 

[AMPMAN]

balanced input

so how does p2 on the schematic control anything if both sides are at the same potential peter?

 

[Peter Daniel]

Re: balanced input

so how does p2 on the schematic control anything if both sides are at the same potential peter?

If they are at the same potential there is no signal coming out of a preamp. Then p2 doesn't control anything.

 

[jleaman]

Peter please email me so i can get your address of shipping..

thanks


Jason

 

[Coulomb]

Hello Peter, I too am trying to decide on a Preamp for the Aelph Amps. I am considereing the BSOZ and Aelph 1.7, any comments?

Do you prefer one over the other?

Anthony

 

[Peter Daniel]

I'm already building P1.7. Somebody who built both commented that P1.7 had more detail and he prefered it overall.

 

[Coulomb]

I'm already building P1.7

Thanks Peter, are you using PCB-Designs board?

I think maybe you have decided to go PTP?

Anthony

 

[Peter Daniel]

PCBs are for rookies, right Harry? This preamp ain't no shoestring either.

 

[Peter Daniel]

P1.7 is very easy to built p2p. And all the connections are very short, possibly better sound.

 

[Erlebo]

Peter,

you said that "The case was bought from my local Chinese store".

I'm looking for a case for my first DIY.

Can you tell me about this Ancient Chinese Secret? I want to get two cases of similar or better quality, but I don't know where to look.


Thanks,

Eric Le Bourhis