I use the NTE50's. Havent had any of them fail yet. I think the other
T092 transistor could use an upgrade also, though.
Andrew
> The MPSU57 can be replaced with NTE189 or NTE50 (TO-202 package). NTE50
> can be bought at frys.com. I haven't found a source for the NTE49's,
> but Bob Roberts has both the MPSU07 and MPSU57 listed on his parts page
> (including the TO-202 package versions) so you may want to email him.
> They're not cheap.
>
> -tn
>
>
> On 4/9/2011 7:40 PM, David Shoemaker wrote:
>>
>> I found a update / repair guide for the WG6100 on
>> http://www.pinrepair.com/video/wg6100.htm but it was last updated in
>> 2000 and it mentions some parts that are now no longer available.
>>
>> In particular it recommends upgrading the MPSU07 with NTE49. Neither
>> of which is actually still in production.
>>
>> The net mentions a CENU07/57 replacement but that is also discontinued.
>>
>> Looking over my vectorlist archive I see suggestions of:
>>
>> MPSU07 -> ZTX653 or TIP32C
>>
>> MPSU57 -> ZTX753 or TIP41C
>>
>> But nothing was definitive in those discussions (primarily about the
>> speed of the TIP's and the 1W base limit of the ZTX part).
>>
>> So is there a "new" version of the update guide out there which covers
>> the modern replacements? Or has anyone done long term testing of
>> either the ZTX or TIP solutions?
>>
>> Thanks,
>>
>> David
>>
>
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Received on Sun Apr 10 09:31:12 2011
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