CS-660 On-off pot replacement

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Willalindsay1984
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CS-660 On-off pot replacement

Post by Willalindsay1984 » Tue Jun 18, 2019 8:36 pm

Hello folks

I am unable to part with my trusty Cs660, which I have had since new at the age of 17 in 2001, I have found so many historic relics over the years and it holds a lot of sentimental value. Recently the on off switch began to work intermittently, until the other week it just will not switch on. I have desoldered it. It says it was produced by Omeg and is a 47KA pot. I've spent a few hours looking for a replacement, I have found a replacement which i think is the same as the one I have removed, upon researching the original, it appears to be a Dpst type, double pole single throw, is has four connectors to the rear which are soldered to wires, and three soldered to the pcb board.

https://cpc.farnell.com/omeg/pc16eco-b4 ... EML007-005

Do yous think I have the right one?. I have just ordered it.

Many thanks


Will



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Re: CS-660 On-off pot replacement

Post by Porker » Tue Jun 18, 2019 8:43 pm

Looks like the right one. The main difference with potentiometers apart from the resistance which is correct is whether they are linear or logarithmic the 'A' means linear so should be OK.
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Re: CS-660 On-off pot replacement

Post by Willalindsay1984 » Tue Jun 18, 2019 8:58 pm

Thank you Porker, I can blow a sigh of relief, for a while I thought it was the battery connectors, I changed those and still had the problem. I'm pretty sure it is the on off switch, I'll be glad to keep it going another 20 years hopefully. I'm going to upgrade at Christmas to a 4 or 5 mxi, very excited, I don't think it would choose any other brand tbh, years of service.

Many thanks.

Will

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Re: CS-660 On-off pot replacement

Post by sweepstick47 » Tue Jun 18, 2019 9:41 pm

Hello will, And good on you for getting stuck-in ::g

Before fitting the replacement, it may be worth giving the original 'pot' a squirt of 'switch cleaner, a ploy I've used many times to resurrect a dodgy 'pot'. It's perhaps also worth mentioning, (due to it's long term use) that the original may have a worn carbon track. An effective solution can be effected by restoring the track's carbon surface by going over it with a soft pencil e.g.(6B).

Hope your replacement is the correct one resolving the problem and allowing another 20 years use. Good Luck ::g Regards ss47
A disservice is no service at all.

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Re: CS-660 On-off pot replacement

Post by Willalindsay1984 » Tue Jun 18, 2019 11:28 pm

Hi Ss47

Many thanks for that tip, something I would never have thought of. My real problem started a few weeks ago, when the switch was working intermittently, I sprayed some switch cleaner on the pots, and from then it stopped working altogether. I disassembled the on-off pot there, there was a lot of black gunk on the tracks and on the small brass contacts. I cleaned it all off, reassembled and sadly. O luck, I also tried the pencil method and no luck, I was pretty hopeful it would have fired up, I'm hoping it is not soemthknf else on the pcb, eek. Fingers crossed the new switch will work, I will keep you all updated. Thanks so much.

Will

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Re: CS-660 On-off pot replacement

Post by andy fraggle » Wed Jun 19, 2019 8:47 am

I will ask our customer service department to see if we have any laying around.

Andy fraggle

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Re: CS-660 On-off pot replacement

Post by Willalindsay1984 » Wed Jun 19, 2019 9:50 am

Many thanks Andy, that's very kind of you, it will be great to keep the old girl going.

Many thanks

Will

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Re: CS-660 On-off pot replacement

Post by andy fraggle » Thu Jun 20, 2019 8:12 am

If you want to send me a PM with your name and address I will get one sent out in the post to you.

Andy

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Re: CS-660 On-off pot replacement

Post by sweepstick47 » Thu Jun 20, 2019 8:20 am

andy fraggle wrote:
Thu Jun 20, 2019 8:12 am
If you want to send me a PM with your name and address I will get one sent out in the post to you.

Andy
Top man Andy ::g ::g ss47
A disservice is no service at all.

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Re: CS-660 On-off pot replacement

Post by andy fraggle » Mon Jun 24, 2019 11:25 am

The new control potentiometer should be sent out today.

Andy Fraggle

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Re: CS-660 On-off pot replacement

Post by Willalindsay1984 » Mon Jun 24, 2019 7:54 pm

Thank you very much Andy, can't wait to get it and get it up and going again.

Many thanks and best wishes

Will

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Re: CS-660 On-off pot replacement

Post by Blackadder43 » Mon Jun 24, 2019 8:02 pm

I have to doff my cap to Andy and cscope
They have always been so helpful with folk and their machines here

I started this hobby in the very early 80's and i am sure as eggs is eggs that my first machine was a cscope
Great company ::g
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Re: CS-660 On-off pot replacement

Post by andy fraggle » Wed Jun 26, 2019 4:31 pm

We do like to try and keep as many older detectors going as possible, especially these days when we are in such a heavily dispoable way of life.

Andy Fraggle

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Re: CS-660 On-off pot replacement

Post by Willalindsay1984 » Thu Jun 27, 2019 12:23 pm

Thank you Andy, you are a man of your word. Enough spares to keep it going for 40 years I hope. This detector has helped me find so many interesting finds over the years, and in one case, changed a small piece of history, I will post a bit more detail later. I have always used it to find aircraft crash sites from the second world war, each time, it has never failed to find an aircraft that has been buried beneath a grassy field, for more than 70 years. I am going to upgrade to a 4 or 6 mxi this Christmas, but I will be letting my daughter use the Cs660 with me when she is a little older, it has so much sentimental value. Thbak you very much. I will post pics and vid when I get it up and going.


Cheers

Will

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