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Author Topic:  sessions 400 power transistors
Jim Goins

 

From:
Michigan, USA
Post  Posted 8 Dec 2017 6:43 am    
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Does anyone know where to get some power transistors, original ones are, RCA 62188 what cross reference would work. thanks. Jim Goins. Confused
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Sam Marshall

 

From:
Chandler, AZ USA
Post  Posted 8 Dec 2017 9:06 am    
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Wow, RCA transistors! They have been out of that business for a long time.

A quick check on Google does not produce anything but there may be an NTE equivalent (or not).

Maybe Mike Brown at Peavey can help.

Best Regards,
Sam
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Jim Goins

 

From:
Michigan, USA
Post  Posted 8 Dec 2017 10:41 am     sessions 400
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Ok thanks Sam. I will keep trying. Jim.
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Dave Mudgett


From:
Central Pennsylvania and Gallatin, Tennessee
Post  Posted 8 Dec 2017 11:21 am    
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I also suggest contacting Mike Brown and/or Peavey service.

There is a Peavey transistor cross-reference list here - http://matthieu.benoit.free.fr/cross/competitive/Peavey_Transistor_Cross.pdf
Code:

ORIGINAL           62188   
IN-HOUSE
NUMBER

ALTERNATE          84140
IN-HOUSE
NUMBER

FIELD              2N3773
REPLACEMENT
NUMBER

ORDER              70484140
NUMBER

NOTES              NPN 140V OUTPUT


There's also this older SGF thread on the Session 400 power transistors: http://bb.steelguitarforum.com/viewtopic.php?t=213280

Even with all this info, I still suggest corresponding with Mike Brown.
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Jim Goins

 

From:
Michigan, USA
Post  Posted 8 Dec 2017 5:00 pm     sessions 400 transistors
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Ok, Thanks Guys, I contacted Mike Brown, he suggested I contact Grant Brown, electrical tec. again thanks for all the input, I'll get this old girl up and running soon. I hope!! Jim.
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Steven Paris

 

From:
Los Angeles
Post  Posted 8 Dec 2017 5:58 pm    
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The 2N3773 is the replacement transistor and is available here:
https://www.mouser.com/ProductDetail/ON-Semiconductor/2N3773G/?qs=sGAEpiMZZMshyDBzk1%2fWi%2fPUgtclNldlz27ZQ8uxym8%3d
A more robust replacement would be the MJ15003 (used in NV400):
https://www.mouser.com/ProductDetail/ON-Semiconductor/MJ15003G/?qs=sGAEpiMZZMshyDBzk1%2fWi%2fPUgtclNldlRd9fQeXRL0k%3d
or the MJ15024:
https://www.mouser.com/ProductDetail/ON-Semiconductor/MJ15024G/?qs=sGAEpiMZZMshyDBzk1%2fWi%2fPUgtclNldlWcmxVW0YXds%3d
_________________
Emmons & Peavey
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Ken Fox


From:
Nashville GA USA
Post  Posted 10 Dec 2017 8:23 am    
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Steve hit it on the head. I use the Motorola as well.
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