Re: Modern replacements / xref for deflection transistors

Got looking around and see Mouser can get the CEN-U07 (Central
Semiconductor version that replaces the MPS-U05, MPS-U06, MPS-U07 and
NTE-188) and the CEN-U57 (Central Semiconductor version that replaces the
MPS-U55, MPS-U56, MPS-U57 and NTE-189). Good news is they're less than $2
each, bad news is you have to order 500 (because Mouser doesn't stock them
and they come in boxes of 500 from Central).

I would be willing to make the order, anyone interested? Price would be
higher ($4-5 each in small quantities, discount for 50-100 piece lots).
These sell on Ebay for around $10 each, very hard to find there, saw some
the other day in a Ebay store, but a normal search doesn't work

.

On Fri, Nov 23, 2012 at 1:27 AM, Ian Eure <ieure@mac.com> wrote:

> 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.
> ---------------------------------------------------------------------------
> ** Unsubscribe, subscribe, or view the archives at
> http://www.vectorlist.org
> ** Please direct other questions, comments, or problems to
> chris@westnet.com
>

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Wed Nov 28 01:51:31 2012