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(one more) ALEPH P 1.7 clone

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#621
Boards are ready - all in gold plated version. One stereo set (2xAP + 2xPS) cost is 15 euro.

Please contact me for detail (shipment costs will depend from country) and remember to put your nick in message subject 😉
 

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#627
Hii Jleman,

i hope you didnt late to have aleph 1.7 PCB
for 1 set preamp (2board + 2psu) = 15 euro
postage for indonesia : 8 euro

for quick order, you can contact veteran by email
(click his name in this thread and choose send email)

Pinkmouse give you exchange rate website to calculate
how much to buy 1 euro, pay with can $ (kurs)
- 15 euro : 21.7 CAD $ ( 1 CAD : 0.691 Euro )
- 15 euro : 20.53 US $ ( 1 US : 0.73 Euro )

If you use paypal you can transfer direct by euro
so they will charge you by canadian $ then 😀
 
#628
SRMcGee said:
suggestions.
Click to expand...

Scott,

bare in mind that NP favors simple and dislikes integrated stuff.
The voltage regulator section for the signal part of the P1.7 is just a single mosfet that is set by a string of zener diodes, it's operating decent because of the 20 volts drop from 80Vdc unregulated to 60 Volts.

A drop of 20 volts allows a multi-stage regulator, which is what the competition are using for their top level products.
A "general" approach is to put the rectified current through a CLC(or CRC), followed by one or two LM317/337 regulator stages.
The pre-cleaned stuff is then fed into a shunt style last stage regulator.
At the Blowtorch thread you can see how it looks like, Mr Perez (aka JustcallmeDad) posted some schematics.
(somewhere between page 50 and 65, provided my memory hasn't blown from coke abuse)
A single design has another CRC stage added between the ones mentioned.

Best mains transformer type before the regulators is not a toroidal but a block type, and preferably a split bobbin model.
Those are "oldfashioned" transformer types, the primary and secondary windings have their own section on the transformer core, not wound on top of eachother like regulars.
A split bobbin transformer is better at keeping the garbage out.
New, it seems they're hard to source at the moment, Digikey carries the ones favored by Mr Curl only up to 36Vac models.
There are a bunch of other transformer manufacturers who do the split winding types.
Overhere, they are easy to DIY with a transformer assembly package.
 
#629
jeffry_widjaja said:
Hii Jleman,

i hope you didnt late to have aleph 1.7 PCB
for 1 set preamp (2board + 2psu) = 15 euro
postage for indonesia : 8 euro

for quick order, you can contact veteran by email
(click his name in this thread and choose send email)

Pinkmouse give you exchange rate website to calculate
how much to buy 1 euro, pay with can $ (kurs)
- 15 euro : 21.7 CAD $ ( 1 CAD : 0.691 Euro )
- 15 euro : 20.53 US $ ( 1 US : 0.73 Euro )

If you use paypal you can transfer direct by euro
so they will charge you by canadian $ then 😀
Click to expand...


Thanks for the help, much appreciated. I have emailed him no response, but that might mean he is busy sending out your boards 🙂 I hope to get this project too!
 
#631
What is mean ?

Hii kraljmatjaz
That is mean you can buy this aleph 1.7 😀
Kidding of course ! Dont be to serious :hot:

1. You can click to page 25
2. Look the post from veteran
3. Theres email coloum below hes posted
4. Klik email
5. Say : BOMB ! 😀 (No need to follow this instruction)
6. tell him you want to buy 1 sets stereo Aleph 1.7 PCB
7. ask him how much cost for shipping
8. ask him how you can pay him (PCB=15 Euro+shipping)
9. If you dont have paypal so you must transfer

The other way
Look the steps 1-2
3. Klik The Veteran name
4. Look CONTACT VETERAN : click "click here to email veteran"
than follow instruction no 6-9

Hope you got the PCB, Good luck
 
#632
Thank you for the instructions, but it is not so simple. Since i only have a few posts, i am not allowed to see other members e-mail details, so i cannot contact Veteran.
Could you send me his e-mail adress (in private), if that's allowed?

Regards,
Boris
 
#638
Jacco:

Thank you for the insight and information! Sorry about the delayed response, but I've only just arrived home from holiday; my wife and I had taken the kids to the Yucatan peninsula south of Cancun, but we felt the need to leave before Hurricane Dean presented itself (I wonder how the kids will fare).

I'll try researching my options, but may send you an email looking for further advice, if you don't mind.

Regards,
Scott
 
#639
I wonder if anyone still have matched mosfet for P1.7. Otherwise, I might need to match myself (first time). My question is what current I should use to match them for P1.7? 70 mA? I assume we should use the current at which the amp operate. Thanks for your advice.
 
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