My Dream Aleph 2 Coming True

[JPDuarte]

Hello everybody of this wonderful forum, I started this project more or less 6 years ago and then stop suddenly , now I don't see the day that I finish it but I know is very close, but have some simple questions to finish it. Trans are Antek 1000v 2 x 37 secondaries and 6 x 68000uf caps. 1- Is 2.00mH 14 gauge fine ? Trans primaries has a pair of cable with 115 w red-black red-black , that means only one pair is to be use red-black. Sorry for this newbies questions but need to be 100 % sure. Thanks in advance. I'll post some photos through the entire building process. Thanks in advance. JP Duarte.
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[Zen Mod]

2mH , 14 Gauge ; what's Rdc of choke ?

you must use two 115V primaries in parallel , to have 1000VA power ;
be sure to connect them in phase


why text in bold ?

besides that - I hope that you are living in country with adequate mains voltage ( 115Vac ) ?

 

[Bill Fuss]

From my coil calculator, it will be around .3 ohms.

 

[JPDuarte]

Thanks both of you for your response, but when you say in parallel that means connecting both hot wires ( red-red) through AC inlet and both neutral wires (black-black) to the cold connector of Ac inlet, please clarify a bit about phase. Thanks again. JP Duarte

 

[Zen Mod]

it's easier to give us link to exact xformer datasheet on Antek's

 

[UKPD]

Hi JP,

That depends where where you are geographically

 

[Bill Fuss]

I've used quite a few Anteks. For 115V operation, connect red together and black together on the primaries.

Lately I have found the Anteks secondaries are not very well balanced, dual bridges are a necessity to keep them quiet.

 

[JPDuarte]

it's easier to gwww.antekinc.com/details.php?p=137ive us link to exact xformer datasheet on Antek's

here is the link, mine is customized to 2 x 37 , I hope this help, and by the way thanks again to take the time to help me. JPDuarte.

 

[JPDuarte]

Hi JP,

That depends where where you are geographically

I'm in USA.

 

[JPDuarte]

what about Phasing? More photos of the building process.

 

[JPDuarte]

I" founded this schematic. What do you guys think about this one.

 

[JPDuarte]

This the case.

 

[Gyuri]

This will be very beautiful.

 

[Zen Mod]

what about Phasing? More photos of the building process.

]
with phasing I meant on primaries phasing ; you solved that

I" founded this schematic. What do you guys think about this one.....]

good one

This the case. View attachment 190824

......

nice

I presume that you have a plan how to spread heat on all 4 sides of case ?

( grouped mounting of mosfets and heat spreaders in angles )

 

[JPDuarte]

Well, I'm planning to mount 3 fets on each heat sink and the rectifiers on the side panel and mounting everyone with Bergquist thermal pads K10 including the rectifiers. One question about the fets, do I have to use any kind of isolation like a plastic washer for the screws that hold the fet to the chassis?

 

[JPDuarte]

This will be very beautiful.

Thanks for your kind words.

 

[JPDuarte]

Here more photos including back panel.

 

[Zen Mod]

Well, ...... do I have to use any kind of isolation like a plastic washer for the screws that hold the fet to the chassis?

nope ;

take a good look at various pictures here ;

or go and pick large pics of FW amps - you'll see many useful details

FIRST WATT REVIEWS

 

[Mfly]

Very nice!

Where did you source the heatsinks?

 

[ggetzoff]

Excellent job on the case.

Antek toroids are an excellent value as well.