PCBs for Aleph 2, Aleph 3, Aleph 4 and Aleph 5 amplifiers - Page 2 - diyAudio
Go Back   Home > Forums > Commercial Sector > Swap Meet

Swap Meet Sell your stuff here, who knows, some other fanatic might be interested!

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Closed Thread
 
Thread Tools Search this Thread
Old 29th April 2002, 08:47 PM   #11
FBJ is offline FBJ  United States
diyAudio Member
 
Join Date: Mar 2002
Location: USA
I second that BrianGT!
 
Old 2nd May 2002, 11:42 AM   #12
diyAudio Member
 
Join Date: Mar 2002
Location: CROATIA
kasra,

I used Fisher 2 X SK 102 heatsinks with height of 32 cm, per one channel of Aleph 2 amplifier.



/K.K.
 
Old 7th May 2002, 09:27 PM   #13
diyAudio Member
 
Join Date: Apr 2002
Hi Kristijan,

What is the quallity of your PCB for Aleph 5 amplifier ?

Is there silkscreen on component side ?

When you will finish PCB for Aleph P 1.7 preamplifier and what size it will be ?


---
Strobo
 
Old 8th May 2002, 12:05 PM   #14
diyAudio Member
 
Join Date: Mar 2002
Location: CROATIA
Hello Strobo,


The Aleph 5 and the rest PCBs are made of 1,6 mm fiberglass base with Cu-50 mikron + Pb track overlay, two sided dark-blue soldermask, drilled, and with white component overlay.

The all PCBs are single sided.

-------

Actually, I finished PCB for Aleph P Version 1.7 and the size is :
215 mm x 125 mm (8,5 in x 5 in).

The PCB layout is similar to other PCBs that I designed on my homepage, and it is very simetrical.

There is one PCB for two channels, like for Balance Line Stage.


Regards,
Kristijan Kljucaric
 
Old 8th May 2002, 01:21 PM   #15
diyAudio Member
 
Join Date: Apr 2002
Hi Kristijan,

What is the two sided dark-blue soldermask ?

Also, I checked your homepage and I didn't find pcb for
Aleph P 1.7 preamp.
When it will be posted ?


By the way, your Aleph amps pcbs looks unbelievable !!


---
Strobo
 
Old 8th May 2002, 03:49 PM   #16
diyAudio Member
 
Join Date: Mar 2002
Location: CROATIA
Hello Strobo,

If you look at the bottom of the PCB (track side) you will see that some PCBs have green color over the tracks.
This is soldermask.

Instead of green, I use blue soldermask.

At my PCBs, the soldermask is double sided, one layer is on the track side of the PCB, and other layer is on component side - before white component overlay.
I use it on the component side just to get better contrast of white silkscreen (component) overlay.

----------

The Aleph P 1.7 preamplifier will be posted at: http://web.vip.hr/pcb-design.vip in a couple of hours.


Regards,
Kristijan Kljucaric
Attached Images
File Type: jpg aleph-p.jpg (80.4 KB, 1178 views)
 
Old 24th May 2002, 02:39 PM   #17
diyAudio Member
 
Join Date: May 2002
Hello Kristijan,

I like very much yours PCB layouts and it seems that they really are state of the art.

But, I dont understand what is the Pb track overlay on your PCBs and what it serve for ?
 
Old 25th May 2002, 08:03 PM   #18
diyAudio Member
 
Join Date: Mar 2002
Location: CROATIA
Hello,


You asked me a question that I don't know to answer very well on english.
But, I think you will understand.

The Pb track overlay on the mine PCBs is a tin layer of Pb/Zn over the Cu tracks.

I think that the right word on english would be - Tinplated.

I enclosed the picture, and like you can see, the silver look of the pads are achived by tinplating.
The all tracks are tinplated, even under blue soldermask.

Tinplating serve for protection from the oxidation of the Cu tracks/pads, thus for improved joints when soldering and lovering the joint resistance.
Also, there is much less risk for cold joints.


Hoped I answered your questions.



Regards,
Kristijan Kljucaric
 
Old 25th May 2002, 09:26 PM   #19
diyAudio Member
 
Join Date: Mar 2002
Location: CROATIA
Well, it seems that I forget to attach the PCB picture,
but here it is.
The picture is not of a very high quality, but I hope that you can
clearly see the tinplated pads.
Attached Images
File Type: jpg pcb.jpg (14.3 KB, 1056 views)
 
Old 31st May 2002, 09:28 AM   #20
diyAudio Member
 
Join Date: May 2002
Thank you Kristijan,

You explained that to me very well.
Now I understand everything about your PCBs.
Well, almost all.

At Passdiy gallery I founded your SIGMA 6 preamplifier.
Why you used the separate PCBs for the left and right channels ?
Why the PCBs in your SIGMA 6 preamplifier are not silkscreened ?
 

Closed Thread


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aleph (Single Ended) + Larvadin (no Memory Distortion) = Ultimate Aleph? tiefbassuebertr Pass Labs 19 25th January 2014 02:15 AM
First version Aleph 0 (Null, ZERO, O, Os, 0s) versus later Aleph versions tiefbassuebertr Pass Labs 13 27th April 2012 02:13 AM
First version Aleph 0 (Null, ZERO, O, Os, 0s) versus later Aleph versions tiefbassuebertr Pass Labs 0 6th August 2009 11:11 AM
WTB: Aleph-mini PCBs and transistor set for Aleph 30 needtubes Swap Meet 4 6th November 2005 06:29 PM
Trade Aleph X PCBs for Aleph P 1.7 PCBs highbias Pass Labs 0 27th September 2004 05:59 PM


New To Site? Need Help?

All times are GMT. The time now is 02:22 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2