I have an amplifier for scrap/salvage. The output devices are C4689/A1804. Any suggestions for a re-use?
The only other thread I found listing them ws as possible devices for a Leach.
Thanks for any help.
The only other thread I found listing them ws as possible devices for a Leach.
Thanks for any help.
Hi,
did you find the Toshiba datasheet?
120V, 8A, 70W, 30MHz,
good SOAR upto 65Vce
good gain if O grade rather than R grade.
Tosh suggest good for 55W into 8ohm. Asking a lot and needs restrictive protection.
I suggest 2pair could do about 65W into 8r from +-40Vdc.
3pair about 95W into 8r from +-47Vdc.
May also do as a high duty driver for a multiple pair output stage driving into low impedance (2ohm).
The Leach clone uses 3pair. This would be just 210W of device which would be similar to 1pair of MJL4302 (230W)
did you find the Toshiba datasheet?
120V, 8A, 70W, 30MHz,
good SOAR upto 65Vce
good gain if O grade rather than R grade.
Tosh suggest good for 55W into 8ohm. Asking a lot and needs restrictive protection.
I suggest 2pair could do about 65W into 8r from +-40Vdc.
3pair about 95W into 8r from +-47Vdc.
May also do as a high duty driver for a multiple pair output stage driving into low impedance (2ohm).
The Leach clone uses 3pair. This would be just 210W of device which would be similar to 1pair of MJL4302 (230W)
Andrew...thanks!
I could not find the data sheet. Do you have it in PDF or otherwise...a link?
I have two pair from an old stereo. Maybe I will just reverse engineer and break the thing down to a cleaner-looking and slightly upgraded amplifier of the same type? That is unless there are suggestions of schematics about?
Also, any objections to bass guitar amplifier use?
Thanks!
I could not find the data sheet. Do you have it in PDF or otherwise...a link?
I have two pair from an old stereo. Maybe I will just reverse engineer and break the thing down to a cleaner-looking and slightly upgraded amplifier of the same type? That is unless there are suggestions of schematics about?
Also, any objections to bass guitar amplifier use?
Thanks!
Hi Cro,
you need to learn to Google.
Search for 2sa1804 and up comes a whole series of possibles,
here's the one I used.
http://www.datasheetcatalog.com/datasheets_pdf/2/S/A/1/2SA1804.shtml
Only two pair hardly seems worth the effort of designing an amplifier around them.
you need to learn to Google.
Search for 2sa1804 and up comes a whole series of possibles,
here's the one I used.
http://www.datasheetcatalog.com/datasheets_pdf/2/S/A/1/2SA1804.shtml
Only two pair hardly seems worth the effort of designing an amplifier around them.
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