[Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200

[mark krawczuk]

hi, i just went out in the cold shed, and on page 96 of the gregorys manual. 
it even  says it sa  power transistor .....

mark k



----- Original Message ----- 
From: "Mike" <niche at iinet.net.au>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, May 17, 2006 9:00 PM
Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200


> At 07:14 PM 5/17/06, you wrote:
>>hi,   you sure it isnt a  powr transistor  ?
>>
>>cause  in the manual  i am pretty sure it tells u how to check it, and it 
>>mentions  c,b and e ?
>
> Yeah these are external reference pins which one can use to make
> "some" tests however,  the reason its more than a power transistor is:-
>
> a.  It has a back emf zener or MOV inherent in the package
> b.  The input (b) has a pre amp of sorts, its input current is far
>     less than any npn power transistor for activation.
> c.  The input of a normal power transistor pulls as much current
>     as it can into a voltage drop of one diode, the RB30 device
>     can accept a variable 3 to 10v input without pulling more than
>     a few milliamps and still function.
> d.  There is an input zener of sorts as well around 12 to 14volts
> e.  Its Vsat is about one to two times a diode drop higher than
>     a properly biased power transistor. This may be part of the
>     coil back emf snubbing, I'm not sure but its not power transistor
>     behaviour as a general rule etc.
>
> Having said that, there may be more than one type from the
> last 25 years. All the units I have seen have an input voltage
> much higher than a diode drop for fully on operation.
>
> btw: I'm interested which manual are you referring to ?
>
> Rgds
>
> mike
>
>
>
>>mark k
>>
>>
>>----- Original Message ----- From: "Mike" <niche at iinet.net.au>
>>To: <diy_efi at diy-efi.org>
>>Sent: Wednesday, May 17, 2006 4:54 PM
>>Subject: Re: [Diy_efi] RE:Ignition amplifier Bosch 0-227-100-200
>>
>>
>>>I'm doing an uprated RB30 ignition module and toyed
>>>with doing a dwell adjust, worked out an easy way to
>>>do it along with auto retard for turbo boost, but decided to
>>>keep it simple so first one will go out on market only
>>>as upgrade with a couple of diagnostic functions. The old
>>>unit by Nissan/Hitachi looks like a transistor but is an
>>>IC in a To-3 can with back emf control but loses 1.5 to 2v
>>>saturation plus it has a slightly variable response time.
>>>Depending on how things go I might add a timer-control
>>>chip to provide some dwell adjust for ECUs that dont offer it,
>>>mine at present does its the Skyline/RB30 ECU with Bosch/Hitachi
>>>innards...
>>>
>>>Rgds
>>>
>>>mike
>>>
>>>
>>>At 01:16 AM 5/17/06, you wrote:
>>>>Guys,
>>>>
>>>> thank you for help.
>>>>
>>>> My problem is that I have to use ignition amplifier that can control 
>>>> dwell. My ECU is not doing it, it only signals when the amplifier can 
>>>> start charging coils and when the spark should be fired.
>>>>
>>>> I hoped I could find one that has more than one end stage in the same 
>>>> package... and 0-227-100-200 was my candidate, as it was used even back 
>>>> in 80ies... but it seems like it isn't. :(
>>>>
>>>> I guess I would have to use 4 single amplifiers then...
>>>>
>>>> Thanks,
>>>> NG
>>>>
>>>>Send instant messages to your online friends 
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>>>
>>>
>>>Regards from
>>>
>>>
>>>Mike
>>>Perth, Western Australia
>>>VL Commodore Fuse Rail that wont warp or melt !
>>>Twin tyres for most sedans, trikes and motorcycle sidecars
>>>http://niche.iinet.net.au
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>>
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>
> Regards from
>
>
> Mike
> Perth, Western Australia
> VL Commodore Fuse Rail that wont warp or melt !
> Twin tyres for most sedans, trikes and motorcycle sidecars
> http://niche.iinet.net.au
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