schematic a370

lt cdr data · 23rd December 2003, 06:25 PM

anyone seen a site with this, saw one with a audio research d400, but can't find now, any pointers welcome..thanks

lt cdr data · 27th December 2003, 06:40 PM

bump!

lt cdr data · 27th December 2003, 08:39 PM

sorry can't edit....I mean musical fidelity A370...help...thanks

A 8 · 28th December 2003, 11:13 AM

Input stage

A 8 · 28th December 2003, 11:16 AM

Output stage

lt cdr data · 28th December 2003, 01:21 PM

hi thanks, its quite close, but not quite the one I saw, almost there!

A 8 · 28th December 2003, 04:20 PM

That is the schematics for the P140/270 and 370 designed in back in -85.

lt cdr data · 28th December 2003, 04:25 PM

The one I saw had two transistors as the driver stage, and 5 pairs of paralleled mosfets at the output. It is very similar though.It was definately a MF a370.
A few transistors in the opamps power supply line, too. It is possible it was revised slightly, as there were 3 versions of the A370.

brikman · 16th January 2004, 10:19 PM

A schematic was posted to this site some time ago, use a Google search on MF A370 to pick it up.

Does anyone know whether the J83 and K226 devices used in the A370 are still available?

Has anyone any more details on these devices which I assume are Mosfets?

Regards

Marcus (First Post!!)

lt cdr data · 7th April 2004, 10:10 PM

Found it and saved it to my hard drive, interesting design, don't fully understand the VAS stage, and the transistors in the opamp stage, but yes, mosfets.

Try searching on the web for them, or ring MF, or the manufacturer of the fets.

23rd December 2003, 06:25 PM	#1
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	schematic a370 anyone seen a site with this, saw one with a audio research d400, but can't find now, any pointers welcome..thanks

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27th December 2003, 06:40 PM	#2
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	bump!

27th December 2003, 08:39 PM	#3
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	sorry can't edit....I mean musical fidelity A370...help...thanks

28th December 2003, 01:21 PM	#6
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	hi thanks, its quite close, but not quite the one I saw, almost there!

28th December 2003, 04:20 PM	#7
A 8 diyAudio Member Join Date: Mar 2003 Location: Gothenburg	That is the schematics for the P140/270 and 370 designed in back in -85.

28th December 2003, 04:25 PM	#8
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	The one I saw had two transistors as the driver stage, and 5 pairs of paralleled mosfets at the output. It is very similar though.It was definately a MF a370. A few transistors in the opamps power supply line, too. It is possible it was revised slightly, as there were 3 versions of the A370.

16th January 2004, 10:19 PM	#9
brikman diyAudio Member Join Date: Jan 2004 Location: Detached house	A schematic was posted to this site some time ago, use a Google search on MF A370 to pick it up. Does anyone know whether the J83 and K226 devices used in the A370 are still available? Has anyone any more details on these devices which I assume are Mosfets? Regards Marcus (First Post!!)

7th April 2004, 10:10 PM	#10
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	Found it and saved it to my hard drive, interesting design, don't fully understand the VAS stage, and the transistors in the opamp stage, but yes, mosfets. Try searching on the web for them, or ring MF, or the manufacturer of the fets.