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Old 22nd January 2004, 03:22 PM   #11
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Old 22nd January 2004, 08:22 PM   #12
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Unhappy DIDN'T DO ANYTHING

It just fell off
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Old 22nd January 2004, 08:24 PM   #13
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Old 22nd January 2004, 08:25 PM   #14
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O.K.
Hi!

I didnt do it..... He said....

Well if I get this right the schematic might look like down below for it. Please correct me if I am wrong (especially the red marks).... Thanks...
Also say what could be done like in Gainclone style if it would be possible because this amp looks like it could...
Also I have found some differences on the original board of the sound system so that would be the second schematic.

I have a question.... My friend heard about my amplifier problems ( I was asking him if he knows where to find datasheets etc.) and he gave me for a couple of cap's a pcb from an old Revox amplifier with an toroid transfo. The pcb contains 2 chips TDA1514A. What should I do. Which amplifier is better?
TDA1514A is mono 50W amplifier but it is very cheap (6$ or so) and RSN is not so cheap (70$ or so). Which one would sound better that is the question now.
Ofcourse there are some sentimental reasons to use RSN chip because my girlfriend says:" What have You done to my stereo she didn't saw what I did to mine....
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Old 22nd January 2004, 08:27 PM   #15
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and the another one- from the old stereo
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Old 22nd January 2004, 09:16 PM   #16
Netlist is offline Netlist  Belgium
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Default Re: DIDN'T DO ANYTHING

Quote:
Originally posted by sparkle
It just fell off
10 X LOL

What a nice picture
I never saw a big chip open like this. Quite impressive.
You might take care, something tells me strange chemicals could be exposed now.

I could try and dig a bit deeper to find more info on that chip but looking at the present state I got the feeling it became quite useless.
Here's one advice: Find the beautiful Gainclone threads, print the nicest pictures (on high glossy paper of course), sit down, relax and show them to your girlfriend, let her choose a model and promise her to build one.
Warning: You could have a hard time with Peterís art.
I know very little about Gainclones, but who says those trafo's are no good? LM3875: Supply: 20-84V. Looks like any trafo could be used.

/Hugo
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Old 22nd January 2004, 10:28 PM   #17
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What about TDA1514A chip. I have 2 of them in an old revox and I could dig them out.....
Yes yes- the LM3875 or LM1875 was my second choice- well maybe the LM1875 was my second choice...

The RSNxxxxx chip was working until the stereo went dead (I meen CD changer went dead).... I think I would give it a try and connect it in the air and see what happens.... I will let You know....

IF You wish I could send You some more pictures I have in greater resolution from that chip........

p.s. picture is from revox board


edit: I found some informations about TDA1514A - don't bother )
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Old 23rd January 2004, 08:39 PM   #18
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by the way - I have started (after some thinking) to work on a RSN module....
BC mannufacturer was buyed buy Vishay and new owner turned down all the semiconductor production so thats why there are no datasheets- among all other reasons
have fun
daniel
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Old 28th January 2004, 02:00 AM   #19
Alex S is offline Alex S  Singapore
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sparkle,
very nice pics you've posted! Much appreciated.
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Old 28th January 2004, 05:57 AM   #20
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Default HI!

More to come when I'm finished- unfortunately my time is very short for DIY audio these days ........
regards
daniel
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