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Transistor help needed

Posted: Sun Oct 30, 2016 8:26 am
by Gazbo
Hello again Gentlemen.
(and Ladies - should there be any !)
Right. I have started the tiger 1 (early HL) turret corrections.
Cupola reposition sorted - check!
Hatch stop fitted - check!
Pistol port re-orientated - check!

Whilst turning the Mantlet to the correct way up, during it's rebuild, the tiny inline transistor, connected to the larger of the two L.E.d.'s has broken off, flush with it's body.
(yes-it's Kaput ! it won't solder - I tried. It's totally frazzled now anyway !) Could anyone tell me what the values should be for this item, so I can buy a replacement please.
(The colour bands were/ are unreadable on mine - so I'd no way of I.D.-ing it.
Had they been readable, I wouldn't have bothered to attempt a repair - and would have simply bought another and replaced it anyway.
So the transistor has now gone from a light grey, with illegible markings, to a burned brown, with no markings !) If I can find out what it should be - I'll order a replacement, I just didn't want to guess, and bust/ overload anything else.
As always - your advice is greatly appreciated.
Thanks in advance.
Gazbo.

Re: Transistor help needed

Posted: Sun Oct 30, 2016 10:02 am
by Raminator
It'll be a resistor, not a transistor. I haven't got one to check directly, but a standard red LED running off a 5V supply (which I assume is what the tank's electrics will be supplying to the gun, better to check it than taking my word for it) would need about 180 ohms to drop it to its working voltage.

Re:resistor help needed

Posted: Sun Oct 30, 2016 11:58 am
by Gazbo
Thankyou Raminator.
I'm a mechanical Engineer, so this Electrical gubbins is, although I have been known to tinker, outside my comfort zone. (Yes. Sorry - I meant to say Resistor ! haha. Standing corrected.)
Problem with testing at the minute, is that the tank is completely stripped for re-spray and weathering. so to re-build to get a volts reading is going to be a bit of a pain. then I'd have to strip it again to replace the resistor anyway. I will see if there is a way to test volts, without a full re-build.
(Unless anyone else knows this figure for definite ?)