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41Hz forum dump
41Hz forum dump
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Old 3rd May 2016, 10:58 AM   #21
peranders is offline peranders  Sweden
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41Hz forum dump
It seems that the 41Hz is hacked. Sad.
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Old 20th May 2016, 03:37 AM   #22
Scratchy is offline Scratchy  Canada
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I sensed the writing on the wall and used the Firefox Scrapbook plugin to grab a copy of much of the 41Hz website including some forums back in 2012.
Let me know what you are after exactly (I don't really have much on the AMP15-ps xp).
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Old 22nd May 2016, 07:17 PM   #23
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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41Hz forum dump
Shall I try to call the owner of 41Hz. He lives in Stockholm and should be too hard to find.
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Group buy: DCT03 DC trap for big toroidal transformers. Sign up for interest HERE. 73 pcb's in order. 73 paid.
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Old 23rd May 2016, 03:43 AM   #24
luka is offline luka  Slovenia
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41Hz forum dump
Quote:
Originally Posted by Scratchy View Post
I sensed the writing on the wall and used the Firefox Scrapbook plugin to grab a copy of much of the 41Hz website including some forums back in 2012.
Let me know what you are after exactly (I don't really have much on the AMP15-ps xp).
Do you have anything about amp2 and amp7?
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Old 23rd May 2016, 04:52 PM   #25
Scratchy is offline Scratchy  Canada
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Yes I have everything on AMP2 - I started building a bridged version of an AMP2.
I bought 2 boards, one for each channel. 1 board is partially completed.
1st photo is the spreadsheet I made with parts placement & optimization calculator.
2nd photo is fitting of board in a Bryston 4B amp case.
The last photo is an AMP2 in a 1U case that V-bro made & sold.

For AMP7 I only have the design note.
I do have some TruePath dox which I believe is the predecessor to the Amp7. This includes some of Audiophools optimization notes.

I'm not sure how much I can post here without copyright infringement.
Some of the files were restricted to customers that actually purchased the kits.
It would be good to find out the status of 41Hz & if Jan has indeed shut down for good.
Attached Images
File Type: jpg AP1040007.JPG (436.2 KB, 238 views)
File Type: jpg P1040029ab.jpg (69.1 KB, 235 views)
File Type: jpg ptjhx.jpg (74.7 KB, 238 views)

Last edited by Scratchy; 23rd May 2016 at 04:55 PM. Reason: typos
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Old 23rd May 2016, 05:05 PM   #26
luka is offline luka  Slovenia
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41Hz forum dump
Quote:
Originally Posted by Scratchy View Post
Yes I have everything on AMP2 - I started building a bridged version of an AMP2.
I bought 2 boards, one for each channel. 1 board is partially completed.
1st photo is the spreadsheet I made with parts placement & optimization calculator.
2nd photo is fitting of board in a Bryston 4B amp case.
The last photo is an AMP2 in a 1U case that V-bro made & sold.

For AMP7 I only have the design note.
I do have some TruePath dox which I believe is the predecessor to the Amp7. This includes some of Audiophools optimization notes.

I'm not sure how much I can post here without copyright infringement.
Some of the files were restricted to customers that actually purchased the kits.
It would be good to find out the status of 41Hz & if Jan has indeed shut down for good.
Bridging amp2... interesting. I don't think there is simple way as with amp7, it there? I have instructions for amp2 ver. 1.0T, is that the same as yours?
I have everything from amp7
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Old 23rd May 2016, 05:52 PM   #27
Scratchy is offline Scratchy  Canada
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Hi Luka,

Yes, I have Amp2T Rev 1.0 as well.
Here are the 2 Bridging docs for the Amp2 as well as my notes on the schematic:
Attached Images
File Type: png AMP2-bridge.png (62.4 KB, 231 views)
File Type: jpg Bridging-doc.JPG (101.3 KB, 229 views)
File Type: jpg AP1040019.JPG (402.8 KB, 46 views)
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Old 23rd May 2016, 06:40 PM   #28
luka is offline luka  Slovenia
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bridging on amp2 as I remember has to be done off the board, as is, you can't do it on pcb itself, correct?

Ah still remember the day, when I was at that stage, 2x
did you solder of thermal paste it?
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Old 23rd May 2016, 07:36 PM   #29
Scratchy is offline Scratchy  Canada
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If you look closely in the 3rd pic above, you can see the jumper I added to bridge it (yellow insulated)
In photo 1 soldered a copper sheet under the chip.
In photo 2 you can see the heat sinks I bought to stick on the chip
In photo 3 you can see the on-board MC7805 voltage regulator chip I added.
Sadly it has been sitting unfinished like this for the last 6 years.
Now that I am retired I plan on finishing these off as a winter project.
Attached Images
File Type: jpg heat-slug_copper-sheet.JPG (329.4 KB, 37 views)
File Type: jpg BCC9 BGA Memory Heatsinks.JPG (12.5 KB, 27 views)
File Type: jpg P1030991.JPG (271.5 KB, 22 views)
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Old 24th May 2016, 03:29 AM   #30
luka is offline luka  Slovenia
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41Hz forum dump
Quote:
Originally Posted by Scratchy View Post
If you look closely in the 3rd pic above, you can see the jumper I added to bridge it (yellow insulated)
In photo 1 soldered a copper sheet under the chip.
In photo 2 you can see the heat sinks I bought to stick on the chip
In photo 3 you can see the on-board MC7805 voltage regulator chip I added.
Sadly it has been sitting unfinished like this for the last 6 years.
Now that I am retired I plan on finishing these off as a winter project.
I see the jumper... to bad it is not jumper like with amp7, that could be call modding.. in any case, you can't do it very fast if you wanted to, but didn't ever look into it, what would it take.

I don't know why do you need CU sheet under the chip, it will raise the chip and make soldering harder, I wouldn't use it (I can see it is very slim)

First time I soldered it, it was the best, 2nd time I used thermal past, not as good, but still good enough. For top heatsink I use U shaped Al profile, nothing special.

If you will need any help or advice, come and find me!
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