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Old 8th May 2006, 06:10 PM   #121
jleaman is offline jleaman  Belgium
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Default Re: Speakers

Quote:
Originally posted by ACK2005
You may need high efficient speakers to match this amp...

Are you talking to me ?
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Old 8th May 2006, 06:43 PM   #122
Tyimo is offline Tyimo  Hungary
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Hi Mad!


I meant this resistor:

"...You can adjust the
gain of the circuit arbitrarily by adjusting the value of R15 without
affecting the quiescent DC values of the circuit. As you decrease the
value of R15 to 0 ohms, the gain will approach 50 (34 dB). As you
increase the value of R15, the gain decreases, with 430 ohms giving 10 dB of gain...."

Now I have 124 Ohm like in the schematic.

Quote:
I encourage you to try the BZLS
I am in the middle of the listening test with my BOSOZ too.

Greets:

Tyimo
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Old 8th May 2006, 07:24 PM   #123
Mad_K is offline Mad_K  Norway
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Sorry, i was thinking BOZ. If you want to improve the BZLS, put in a active CCS. Just lower R15 if you need more gain, otherwise just leave it as is
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Old 9th May 2006, 09:07 AM   #124
Mad_K is offline Mad_K  Norway
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Default Professional SEWA PCBs?

Jason ( jleaman) wants to have professionaly made SEWAr1 PCBs. I have made a pcb layout for prototype production, and I will run this if there is some interest. I've managed to make a nice single sided board, plated through holes, soldermask and silkscreen. Board Size is only 25x80mm. The cost will be 10$ per board. I will only make 8 boards on this proto-run, and then build/test it. Jason wants a pair, so for now there will be only 2 pairs available. If there is continued interest I will have some more boards made.
Post here or email me directly if you are interested.
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Old 9th May 2006, 10:15 PM   #125
jleaman is offline jleaman  Belgium
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Default Re: Professional SEWA PCBs?

Quote:
Originally posted by Mad_K
Jason ( jleaman) wants to have professionaly made SEWAr1 PCBs. I have made a pcb layout for prototype production, and I will run this if there is some interest. I've managed to make a nice single sided board, plated through holes, soldermask and silkscreen. Board Size is only 25x80mm. The cost will be 10$ per board. I will only make 8 boards on this proto-run, and then build/test it. Jason wants a pair, so for now there will be only 2 pairs available. If there is continued interest I will have some more boards made.
Post here or email me directly if you are interested.

Good job. I can see this project going under toe. SOME ( i say openly ) may want a psb for a Psu. I'll design that if you are ok with that. We can talk more.

Jase
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Old 10th May 2006, 01:06 PM   #126
Mad_K is offline Mad_K  Norway
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Default Update

As it turns out, my PCB supplier will not deliver single sided boards with plated through holes, only double sided. I am in the process of redesigning the layout for a 2-layer board, gold plated, green soldermask on both sides and white silkscreen on top. I want to take advantage of this, and use some SMD parts (0805 and SOT-23). This will be a better performing board, a little smaller 25x53mm, but some are reluctant to do SMD soldering. I can now get the price down to 7USD per board. How do you feel about this?

From this proto-batch there will be 5 pcb pairs available. jleaman and Jack C. have expressed interest, and if they are up to some easy SMD soldering, I have 3 pairs available.
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Old 10th May 2006, 01:27 PM   #127
squadra is offline squadra  Netherlands
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I would like to have a pair too, I am very curious about the sound of Single Ended Solid State
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Old 10th May 2006, 01:41 PM   #128
Ryssen is offline Ryssen  Sweden
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I´ll try a pair.Just tell me how.
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Old 10th May 2006, 02:18 PM   #129
Mad_K is offline Mad_K  Norway
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If jleaman and Jack C. still wants a pair each, we can proceed and order the boards
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Old 10th May 2006, 03:54 PM   #130
jleaman is offline jleaman  Belgium
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They look really good mad_k SMD my fav.. I'll buy a pair.
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