1DIFFQC amplifier

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OnAudio

OnAudio

Member
Joined 2011
Hi Toni,

Here we go. You will need to get some spice libraries from the respective manufacturers websites as they hold copy right. On-semi Fairchild etc

kind regards,

Harrison.

astx said:
Dear Harrison,

thank you for providing asc files for testing. On opening it there are many missing symbols. Are you able to provide it too (except Cordell-Models.txt which are to be downloaded from Bob's homepage)?

Thx, Toni
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OnAudio

OnAudio

Member
Joined 2011
Hi Alex. Remember this.:D Your quite the crafts man
 

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jkuetemann

jkuetemann

Member
Joined 2010
Progress...

Almost fully stuffed, save for the MPSW42. Local retailer didn't have that and I'm not too keen to order the two I need from my regular sources due to shipping costs. It might run the 2N5551 a little hot but is it a passable substitute? Any other suggestions for the MPSW42?
 

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OnAudio

OnAudio

Member
Joined 2011
Hi Jason,

Beautiful.:D

The 2N5551 with some sort of heat sink will work. Try to get the MPSW42 though;). Will check for alternatives, the last time I did that was one year ago:). Might find new transistors on the market.

kind regards,

Harrison.

jkuetemann said:
Almost fully stuffed, save for the MPSW42. Local retailer didn't have that and I'm not too keen to order the two I need from my regular sources due to shipping costs. It might run the 2N5551 a little hot but is it a passable substitute? Any other suggestions for the MPSW42?
Click to expand...
 
OnAudio

OnAudio

Member
Joined 2011
Hi Jason,

Looked around for substitute. Not much has changed in the last one year concerning transistors. There were new types but the case style was more surface mount.

You could use BD139(but ensure the rail voltage does not exceed +/-40), MJE340 etc.

kind regards,

Harrison.

Service Note
The 2N5551 (with heat sink) and MPSW42 need to be checked for replacement when servicing a blown out output stage.
 
jkuetemann

jkuetemann

Member
Joined 2010
Well, thanks to the kindness of Harrison I now have two fully stuffed boards aside from the heat sink mounted transistors which are waiting patiently for me. I just need to decide which of my available heat sinks to use and which orientation I'd like to mount the boards in.
 

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OnAudio

OnAudio

Member
Joined 2011
Looking forward to your review and analysis ;) .

As Evette put it :D

"The bass takes you to the center of the earth and the highs put you on cloud 9. You,ll end up listening to your whole collection of music again. If You built anything in life please put this amp on top of your list.
This amp can really swing the current. "


kind regards,


Harrison.


jkuetemann said:
Well, thanks to the kindness of Harrison I now have two fully stuffed boards aside from the heat sink mounted transistors which are waiting patiently for me. I just need to decide which of my available heat sinks to use and which orientation I'd like to mount the boards in.
Click to expand...
 
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