Re: Modern replacements / xref for deflection transistors

Bill:

Thanks for this info. Have been meaning to do this myself and was going
to cross-reference your site before I got started but just haven't found
the time to do it. I'm printing this stuff out to include in my binder.

Pat

On 11/23/2012 2:38 PM, wboucher6@cogeco.ca wrote:
> Regarding replacing MPSU57 with MPSA56, it would be much better to use MPSW92R...
> http://www.digikey.com/product-detail/en/MPSW92RLRAG/MPSW92RLRAGOSCT-ND/1967202?cur=USD
>
> however, an ideal replacement (much closer equivelency) component would be the ZTX753...
> http://www.digikey.com/product-detail/en/ZTX753/ZTX753-ND/92510
>
> The NPN compliment to this would be the ZTX653...
> http://www.digikey.com/product-detail/en/ZTX653/ZTX653-ND/92504
>
> A good sub for MPSU07 is MPSW42G...
> http://www.digikey.com/product-detail/en/MPSW42G/MPSW42GOS-ND/1482545?cur=USD
> Also, the MPSU10 can also replace the 07.
>
>
> A good press-on heatsink for the newer parts is here:
> http://www.digikey.ca/scripts/DkSearch/dksus.dll?WT.z_header=search_go&lang=en&keywords=HS251-ND&x=19&y=21&cur=USD
>
>
> Bill Boucher
> http://www.biltronix.com
>
>
>> From: Ian Eure <ieure@mac.com>
>> Date: Fri, Nov 23, 2012 at 2:27 AM
>> Subject: VECTOR: Modern replacements / xref for deflection transistors
>> To: vectorlist@vectorlist.org
>>
>>
>> I managed to fry a G05 board pretty well. I swapped this working board into
>> a dead monitor to test, turns Q608 & Q709 had been swapped and R718 caught
>> fire. Also as it happens, someone had replaced F700 on this deflection
>> board with a 10A fuse, so while F600 blew and the Y section is likely fine,
>> a bunch of stuff in the X section got fried.
>>
>> It looks to me like R718, R713, Q705, and Q706 at least are dead.
>>
>> Q705 is just a 2N3906, which I can get anywhere, but Q706 looks harder to
>> come by. While I was digging around the internet, I found this incredibly
>> great list of V2000/G05 transistors with some cross references:
>> http://westnet.com/~chris/arcade/g05_transistor_list.pdf Unfortunately,
>> this list is a good 13 years old itself, so the parts it suggests are
>> obsolete as well.
>>
>> I went looking around and MPSU57 is long discontinued, as is SK3200 and the
>> "upgrade" NTE50 part. NTE189 is the modern replacement for NTE50, but seem
>> to be extremely expensive ($30) when they can be found at all. I found some
>> folks saying they had successfully substituted MPSA56 for MPSU57, as well
>> as MPSA05 for the MPSU07 at Q607/Q707.
>>
>> Has anyone successfully substituted those parts? Looking at the datasheets,
>> it seems like the tolerances are somewhat lower, so I was hoping someone
>> could point me in the right direction. I have a few boards I want to work
>> through, so having some of these on hand will be a big help.
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Received on Fri Nov 23 15:49:45 2012