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'81 GS550T ignition replica for a few euro !

  • Thread starter Thread starter kokar
  • Start date Start date
Matchless said:
Pete,
The trick is to keep the left and right hand shakes synchronised and heavily rely on the following, these fit over my glasses! ;)
attachment.php
Click to expand...

Aaaah I see! I always wanted one of those when I was doing a lot of electronics fiddling... I noticed they come in very handy!
 
Kokar, just ran in to this, Amazing work mate!!!:clap:
i was wondering about the R/R? any luck with that? my is on its way out and i dont want to spend $100 for something that i could possibly do myself for $20, Thank You :)
 
Kokar,
I hope you are still watching this thread. I have not tested my ignitor, but sat down with a multimeter to do some bench tests on it just to make sure I did not mess anything up. I could not measure any voltage on the 2SK163 (I used a BS170) except the +12V rail on the Drain pin. Can you recall if you did any voltage readings on it and what they were?
I am not so familiar with using a FET in that sort of configuration.
Thanks.
 
the specs for the 2SK163

2SK163 MOSFET transistor datasheet. Parameters and characteristics.

Type Designator: 2SK163

Type of 2SK163 transistor: MOSFET

Type of control channel: N-Channel

Maximum power dissipation (Pd): 400mW

Maximum drain-source voltage (Uds): 50V

Maximum drain-gate voltage (Udg):

Maximum gate-source voltage (Ugs):

Maximum drain current (Id): 30mA

Maximum junction temperature (Tj): 150?C

Rise Time of 2SK163 transistor (tr): 9mS

Drain-source Capacitance (Cd), pf:

Maximum drain-source on-state resistance (Rds), Ohm:

Manufacturer of 2SK163 transistor: NEC

Package: TO-92

Application: AF low noise amplification



BS170 MOSFET transistor datasheet. Parameters and characteristics.

Type Designator: BS170

Type of BS170 transistor: MOSFET

Type of control channel: N-Channel

Maximum power dissipation (Pd): 0.83W

Maximum drain-source voltage (Uds): 60V

Maximum drain-gate voltage (Udg):

Maximum gate-source voltage (Ugs):

Maximum drain current (Id): 0.5A

Maximum junction temperature (Tj): 150?C

Rise Time of BS170 transistor (tr):

Drain-source Capacitance (Cd), pf:

Maximum drain-source on-state resistance (Rds), Ohm: 5

Manufacturer of BS170 transistor: FAIRCHILD

Package: TO-92

Application: Trough-Hole MOSFET

the cross reference page...

http://alltransistors.com/mosfet/cr...&id=0.03&tj=150°C&fr=&cd=&rds=&mnf=&caps=TO92
 
Kokar,
The problem was that I could not find a supplier for the 2SK163 so tried the BS170 and now have no voltage at the FET output.

Do you know if the out put voltage on your FET was 4V7 as per the zener voltage?

If so I can try using the LM2931 which is a 5 Volt regulator for automotive use. It is also a TO92 type. I just need to be sure on the exact purpose of the 2SK163.

Thanks for coming back.
 
Matchless said:
Kokar,
I hope you are still watching this thread. I have not tested my ignitor, but sat down with a multimeter to do some bench tests on it just to make sure I did not mess anything up. I could not measure any voltage on the 2SK163 (I used a BS170) except the +12V rail on the Drain pin. Can you recall if you did any voltage readings on it and what they were?
I am not so familiar with using a FET in that sort of configuration.
Thanks.
Click to expand...

look the image

igniter.jpg


i think that the BS170 is ok for the job
 
Thanks, I have ordered some 2SK163 Fets just in case. Will do some more testing in the mean time.:)
 
Last edited:
Kokar,
I have received the 2SK163 Nfets and they work.:)

I measured 3.7V there, the BS170 does not seem to work, but I will play with them a bit when I have some time.

I did briefly try the LM2931 which gave me a perfect 5V on that rail, but that was just to satisfy myself:)

Just thought I should post this in case someone else needs this info.
 
Someone here selling working igniters for an 81 GS550TX? I can't tell with all the tech talk :P
 
these days I make a modification to the original schematic of igniter and i used FET instead ntarligiton transistors.
the FET have very low resistance when is ON so that we have better SPARK
 
kokar said:
these days I make a modification to the original schematic of igniter and i used FET instead ntarligiton transistors.
the FET have very low resistance when is ON so that we have better SPARK
Click to expand...
So, are these n-channel (mos)fet's ?
 
kokar said:
these days I make a modification to the original schematic of igniter and i used FET instead ntarligiton transistors.
the FET have very low resistance when is ON so that we have better SPARK
Click to expand...


Very interesting! Have you got it running with the FETs? Tell us more!
 
Sorry, I'm Looking for the dimesions of this board. Could anyone who has one of these let me know?
 
Noob Questions

Noob Questions

I have a failed igniter box on my 1980 GS450L. I am considering building one based on your design. I am very mechanically able, but a bit nooby with electronics. I think I could pull it off, but I need a bit more information. I understand that "R" components are resistors, and "C" components are capacitors, but what are the other parts? The photo I got off the thread of the PC board is too small for me to read all the component numbers, and it looks like some of the parts aren't numbered; could you clarify and post a larger picture?

Sorry for being a simpleton, but I would like to see if I could get enough info to build one with my somewhat limited knowledge.

G
 
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