self cancelling indicators (reed switch in speedo)

[robin]

Just buggered my speedo reed switch, so my indicators have stopped self cancelling, anyone had any luck in replacing the little reed switch?

any idea where to get a replacement what type it is?

[thehut]

i wondered what that was and how it works myself

[cb250g5]

I'm not sure on sizes, but something like

www.ebay.co.uk/itm/Reed-relay-SPST-NO-30W-Magnetic-Relay-2-7-x-20-5-200VAC-for-rails-models-robots-/160860909151?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item25740eae5f

should do it.

There isn't really types of reed switches, afaik, they are all just 2 strips of steel in a glass tube where magnetism brings them together to make the contact.

I changed thousands of them in the 80's, in electronic telephone exchanges. They used to stick closed.

[robin]

cb250g5 Thanks for that information and the link, I have changed a few in my time too, I was just asking if anyone knew an exact part number so I could match current and volts. The link you sent is spot on for size, 20.5mm x 2.7mm

I Have just been to my local Maplin store, their part No. N30AD (£1.70ish) is close enough to the physical size for the job, it has to fit inside the holder, soldered in place and ticking away like a good'un when I spin the front wheel.

Next time I work on the speedo, I will pull the reed switch out trying to keep it level and square as it pulls out of the housing, I managed to flex the holder and cracked the glass envelope, that's why it stopped working.

Many thanks for the replies.

Robin

[rich]

Robin, did you get hold of a switch? Just asking as I found one in my box of old bits of loom and would gladly pop it in the post if it helps

[robin]

Nov 7, 2013 17:54:47 GMT 1 rich said:

Robin, did you get hold of a switch? Just asking as I found one in my box of old bits of loom and would gladly pop it in the post if it helps

Thanks for the offer Rich, but all sorted with the part from Maplins, works fine now...