MPP

Salas · 2012-09-04 11:40 pm

There is a snap-in F&T that I got in many pins, some are NC for stability, that has no back screw. Same internals I presume.

Joachim Gerhard · 2012-09-04 11:50 pm

I did not search very eagerly, there is more at Distrelec.

Salas · 2012-09-05 12:08 am

They should be doing the job well in any form obtainable. Very decent brand.

Joachim Gerhard · 2012-09-05 12:46 am

OK, we will use F&T.

RCruz · 2012-09-05 10:29 am

Joachim Gerhard said:
It could start with this transformer. Simply rectified it has too much voltage. We can drop the voltage in resistors or we can use coils. One transformer is enough for both channels but 2 can be used for double mono.Transformateur R-CORE à fixation sur châssis 30VA - 2 x 24V - Transformateurs R-CORE pour châssis

Very good and inexpensive... I use the same.

Joachim Gerhard said:
This rectifier diode is hopelessly over dimensioned but hyperfast and soft recovery.
Other like Fairchild make similar products.http://www.hifituning24.de//downloads/hfa08tb60.pdf

My first choice for rectifiers also

Joachim Gerhard said:
I would vote for a passive solution with coils.

Yes, passive is the way to go IMO gyrators can kill dynamics if not perfectly dimensioned.

RCruz · 2012-09-05 3:06 pm

I am collecting parts for my R3 build... Does anybody know about these caps ? https://www.distrelec.ch/ishop/Datasheets/jiEMZ-B33063B_de.pdf

Are they ok for the riaa filter ?

Joachim Gerhard · 2012-09-05 4:49 pm

KP is usually a film and foil polyester.

Joachim Gerhard · 2012-09-05 5:03 pm

No, they are PP, film and foil. Look good.

MiiB · 2012-09-05 6:09 pm

Those were the ones we used in the OLD LA-Audio days for the Riaa filters...

RCruz · 2012-09-05 7:32 pm

MiiB said:
Those were the ones we used in the OLD LA-Audio days for the Riaa filters...

Nice to know that... I need those exactly for that purpose.

PS: Did you receive my PM ?

Joachim Gerhard · 2012-09-05 7:32 pm

Then they must be good. Still have around an LA Audio tube power amp that sounds decent considering that it is 20 years old. I always come back to it for reality check.

pdul · 2012-09-09 7:34 pm

Will MJE 15032/33 be ok as the powertransistors in the Paradise?

Would be nice, since i have a good handfull of those in stock.

Joachim Gerhard · 2012-09-09 7:44 pm

When the footprint is the same they will work.

pdul · 2012-09-09 7:49 pm

Ok

Thats a very low demand.

pdul · 2012-09-09 7:50 pm

Thanks

Joachim Gerhard · 2012-09-09 7:52 pm

Base, Emitter and Collector should come out of the correct pin. I know, this is pathetic but Japanese transistors often have another Pin Out. On Semi uses the European system i think.

pdul · 2012-09-09 8:51 pm

They are On Semi, and they are BCE like tip31, so the pinout is ok. It was more the other specs i was unshure of

pdul · 2012-09-09 8:57 pm

I have another question. What if the chokes are connected on the primary of the transformers instead of the secondarys. Wont it have the same efect on RF filtering?

Joachim Gerhard · 2012-09-09 9:02 pm

I have shown a circuit how to connect the Telamas correctly.
As ripple filters after the bridges they are more or less useless.

Joachim Gerhard · 2012-09-09 9:06 pm

You can find the circuit in post 7192. They belong behind the transformer and before the bridges.

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