'81 GS550T ignition replica for a few euro !

[pete]

Pete,
The trick is to keep the left and right hand shakes synchronised and heavily rely on the following, these fit over my glasses!

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!

[Crazy_Russian]

Kokar, just ran in to this, Amazing work mate!!!
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

[Matchless]

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.

[kokar]

the price for the FET 2SK163 is too small, http://www.ebay.co.uk/itm/2SK163-Tra...ht_4679wt_1202

i don't know if the BS170 is 100% compatible

[kokar]

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/crsearch.php?&struct=MOSFET&polarity=N-Channel&pd=0.4&uds=50V&udg=&ugs=&id=0.03&tj=150%C2%B0C&fr=&cd=&rds=&mnf=&caps=TO92

[Matchless]

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.

[kokar]

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.

look the image



i think that the BS170 is ok for the job

[Matchless]

Thanks, I have ordered some 2SK163 Fets just in case. Will do some more testing in the mean time.

[Matchless]

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.

[vintshave]

Someone here selling working igniters for an 81 GS550TX? I can't tell with all the tech talk :P

[Matchless]

Someone here selling working igniters for an 81 GS550TX? I can't tell with all the tech talk :P

I think this was only a DIY thread on how to build your own.

[kokar]

I think this was only a DIY thread on how to build your own.

1000% correctly !

[kokar]

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

[tom203]

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

So, are these n-channel (mos)fet's ?

[Matchless]

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

Very interesting! Have you got it running with the FETs? Tell us more!