Re: MAC11b ECU Trials & Tribulations

["Mike Rosoft" <mike_rosoft@email.msn.com>]

Dear Doug & Igor,

    I've also looked into the 'swap senario' and found that the NEC part
(2SC 2334) has the following specs:
NPN silicon, TO-220 (case style),
    (1) 150V Collector-Base,
    (2) 100V Collector-Emitter,
    (3) 7V Emitter-Base,
    (4) 7A Collector Current,
    (5) 40W Max Power Dissipation,
    (6) 5MHz Max Frequency,
    (7) 40(min)/200(typical) Current Gain,
    (8) 3A Bias Current for gain.

The TIP41C (Philips/various) has the following specs:-
NPN silicon, TO-220 (case style),
    (1) 100V Collector-Base,
    (2) 100V Collector-Emitter,
    (3) 5V Emitter-Base,
    (4) 6A Collector Current,
    (5) 80W Max Power Dissipation,
    (6) 3MHz Max Frequency,
    (7) 15(min)/75(typical) Current Gain,
    (8) 3A Bias Current for gain.

Igor's 2SD866B (Matsushita/Panasonic):-
NPN silicon, TO-220 (case style),
    (1) 130V Collector-Base,
    (2) 80V Collector-Emitter,
    (3) 7V Emitter-Base,
    (4) 7A Collector Current,
    (5) 40W Max Power Dissipation,
    (6) 15MHz Max Frequency,
    (7) 60(min)/260(typical) Current Gain,
    (8) 3A Bias Current for gain.

My .02c worth - go with Igor's Part! this particular transistor (2SC2334)
has quite a high current gain for a power device, using a TIP41 could let
you down in a big way.

P.S. if Igor could email me the ECG cross reference, I'd like to scan
through. Not seen ECG parts over here!

Mark
88 200T still running smoooooooooth!


-----Original Message-----
From: four.rings@MCIONE.com <four.rings@MCIONE.com>
To: Douglas Hurst Quebbeman <dougq@iglou.com>
Cc: quattro@coimbra.ans.net <quattro@coimbra.ans.net>
Date: Tuesday, December 30, 1997 5:00 PM
Subject: Re: MAC11b ECU Trials & Tribulations


>Douglas Hurst Quebbeman wrote:
>
>> So, I put back in the salvaged ECU, but oops, I think I bent that
>> transistor a little too far, yup, snapped off an NEC C2334
>> into my pissed-off fingers.
>>
>> The little bugger crosses over to a TIP 41C, but wouldn't you
>> know it, NO electronics stores open Friday or Saturday other
>> than ReamMe O'Shack, for whom a TIP 41C is a special order
>> part.
>
>Doug,
>
>I am looking into my faithful bible, "Philips ECG Semiconductor
>Replacement Guide", which has never ever let me down.
>
>C2334 crosses over to ECG54 (TO-220, high speed, NPN, Si, f=70Mhz,
>gain=100)
>TIP-41C crosses over to ECG331 (TO-220, high speed, NPN, Si, f=3Mhz,
>gain=40)
>
>I think you need an ECG54, not ECG331 (or TIP-41C).
>
>I ransacked my stash of transistors here at home and found one D866B,
>which also crosses to ECG54. E-mail me your snail-mail address and I'll
>Scotch-tape it to a postcard and stick into envelope and mail it to you.
>Also, If you wish, I can make copies of my ECG, NTE and SK
>Cross-references on 3.5" floppies and mail them to you as well. Sure
>beats leafing through a dog-eared paperback catalogue.
>
>--
>Igor Kessel
>'89 200TQ -- 18psi (TAP)
>'98 A4TQ -- FINALLY!
>Philadelphia, PA
>USA
>
>