Modifying a First Act MA104

[Enzo]

Well it could be anything in the circuit.  The 10 year old thread is about an MA104, and you have a MA007.  Are they the same inside?  I don't know.  Can you post a schematic?

[Jazz P Bass]

In all probabilty, if the amplifer worked before you 'modded' it and now it does not work, then you did something wrong.I would suggest that you go back and check your work.

[mark999]

Comparing MA104Final.png with the non-final image (from the other forum, via archive.org), it seems a byte (0d) got deleted in the PNG header. After inserting it, I'm able to open the schematic.

Code Select Expand

diff -uw <(hexdump -C MA104Final.png|head -n1) <(hexdump -C MA104Final_fixed.png|head -n1)
-00000000  89 50 4e 47 0a 1a 0a 00  00 00 0d 49 48 44 52 00  |.PNG.......IHDR.|
+00000000  89 50 4e 47 0d 0a 1a 0a  00 00 00 0d 49 48 44 52  |.PNG........IHDR|

So if anyone still cares about this amp's schematic, the file can be fixed.

I would attach it here but don't see a button that'd allow me to attach a file - maybe because I'm new?

[g1]

I would attach it here but don't see a button that'd allow me to attach a file - maybe because I'm new?

If you are using the 'quick reply' box at bottom of page, click on the 'preview' button and you will be given options for attachments.