Re: Modern replacements / xref for deflection transistors

Hi,

Central use to stock them 4-5 years ago.

Mark

On 11/28/2012 08:52, Rodger Boots wrote:
> For what it's worth, I've ordered these. Now to see if Central will
> make them. Central is one of those companies like Lansdale or
> American Microsemi that make obsolete parts, usually from the
> origional masks after original companies quit making the parts.
>
>
> On Wed, Nov 28, 2012 at 12:51 AM, Rodger Boots <rlboots2@gmail.com
> <mailto:rlboots2@gmail.com>> wrote:
>
> 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
> <mailto: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
> <http://westnet.com/%7Echris/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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>
>

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Received on Wed Nov 28 11:52:17 2012