[TR] Yeah, I know, the Overdrive...Again....
Tom Walling
pdqtr6 at comcast.net
Sun Jul 23 16:55:04 MDT 2017
Relays are a switch. They use low power to operate an electromagnet which closes the contacts for a higher powered circuit, thus saving the smaller switch you used to energize the relay. Here's the Wikipedia explanation: https://en.wikipedia.org/wiki/Relay
Cars built back when your TR3 was don't have diodes anywhere in them. Heck, even the radios were tube-type not the new-fangled transistor kind.
> On July 23, 2017 at 5:38 PM TERRY SMITH <terryrs at comcast.net> wrote:
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> So the overdrive worked great on the day after I adjusted the linkage. The next day, slipped in and out. Fluid is topped off and am using Redline MT-90 per all recommendations. The fuse is NOT blown, but when I test, I get no clunk of engagement nor snap from disengagement. I've checked and rechecked all the wires leading in the system. Joints are soldered, solid and insulated (shrink tubing).
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> Except.
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> The relay. I didn't even know I had one. Leastwise, I'd forgotten since I first wired the thing a dozen years ago.
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> Relays are simple mechanisms. Looks like a resister, maybe a diode in there. But diodes blow and resisters can die.
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> Just curious, though. It's been 50 years since I was working on comm/nav electronics on F4-Phantom jets so am not clueless, but definitely rusty, about electronics. Are simple relays more or less bullet-proof, or do they have some sort of reputation I'm not aware of....????
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> Thank you, everyone,
>
> Terry Smith, '59 TR3A, A-Type OD, TS 58667
>
> New Hampshire
>
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