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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 12th Nov 2017, 2:14 pm   #21
TonyDuell
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Default Re: Dansette Challenge 100 Switches

One possible problem is that while the 3 tags for the variable resistor part are arranged in a standard way, the 4 for the switch are not. Different manufacturers arranged the switch in different ways.

So you can transfer the 3 leads for the volume control part over to the new potentiometer without problems. For the switch, before wiring it, you need to turn the spindle so the switch is 'on' and use your multimeter to find how the tags are connected. There should be 2 pairs of 2 tags where the 2 tags in a pair are electrically connected by the switch, but the 2 pairs are isolated from each other.

It is _essential_ that you wire the mains cable so that the 2 do not go to the same 'pair'. Otherwise the switch will short the mains when it is turned on!. Then connect the 2 wires to the rest of the record player to the remaining tags, if you know which one was originally the live wire (connected to the live wire of the mains cable via the original, broken, switch) then connect that to the other tag of the 'pair' that you connected the live wire of the cable to on the new switch.
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Old 12th Nov 2017, 2:48 pm   #22
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Default Re: Dansette Challenge 100 Switches

Hi Hoddbod.

If you are struggling to make sense of the connections then for safety you may wish to have someone sort it out for you. No point putting yourself or others in danger.
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Old 19th Nov 2017, 11:46 am   #23
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Default Re: Dansette Challenge 100 Switches

Hi.
I replaced the pot with one from Bowood Electronics, complete disaster. I wired it correctly but when switching on just blows mains fuse. What is the voltage on this replacement, I assumed 240 volts
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Old 19th Nov 2017, 11:56 am   #24
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Default Re: Dansette Challenge 100 Switches

Most pot switches of that type are rated for mains voltage.

Photo's of switch showing wiring etc.....?

Without the wiring info it makes it difficult as I can't find a schematic for your record player.

Resistance measurement across the output of the switch?

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Old 19th Nov 2017, 11:59 am   #25
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Default Re: Dansette Challenge 100 Switches

Extract from the circuit diagram for the 14-3 Amplifier, which I assume is the correct one?

Did the player work before the original switch broke?
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Old 19th Nov 2017, 12:59 pm   #26
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Default Re: Dansette Challenge 100 Switches

Quote:
Originally Posted by Hoddbod View Post
I replaced the pot with one from Bowood Electronics, complete disaster. I wired it correctly
It's possible that the position of the terminals of the new switch are not in the same place as the original. You should have checked the switch before connecting the wires. I think you may have wired it so the switch is across the mains and it will short out the mains and blow a fuse when you switch on.
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Old 19th Nov 2017, 1:01 pm   #27
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Default Re: Dansette Challenge 100 Switches

Quite possible and will damage the new switch.
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Old 19th Nov 2017, 1:13 pm   #28
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Default Re: Dansette Challenge 100 Switches

Only a picture of the wiring to the mains switch/volume control will enable us to progress this fault.

The ball is firmly in the OP's court.
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Old 19th Nov 2017, 3:31 pm   #29
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Default Re: Dansette Challenge 100 Switches

Hi.
yes the on of switch was different from the original. I wired it wrong and it displayed the exact symptoms described. Is the switch u/s or will it still work if i wire it correctly.
Thank you for your help.
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Old 19th Nov 2017, 3:33 pm   #30
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Default Re: Dansette Challenge 100 Switches

You will have to test the switch by putting a meter on ohms range across each pair of contacts. They should show open circuit with the switch off and short circuit with the switch on.
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Old 19th Nov 2017, 5:47 pm   #31
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Default Re: Dansette Challenge 100 Switches

Hi. With switch on i get 1.2 ohms is that ok
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Old 19th Nov 2017, 6:12 pm   #32
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Default Re: Dansette Challenge 100 Switches

Probably with a bit of luck, what was the fuse rated at that blew?

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Old 19th Nov 2017, 6:17 pm   #33
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Default Re: Dansette Challenge 100 Switches

A bit worried on what’s being measured, if it’s across live and neutral it’s rather low.
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Old 19th Nov 2017, 6:19 pm   #34
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Default Re: Dansette Challenge 100 Switches

I was hoping he had disconnected it from circuit

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Old 19th Nov 2017, 9:18 pm   #35
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Default Re: Dansette Challenge 100 Switches

Does Hoddbod mean that he checked across each pole of the switch -i.e. between the supply & load side of Live and Neutral. If that is the case then of course a reading of 1.2 ohms, some of which will be the resistance of the meter's test leads, is what's to be expected. As Lawrence says I hope this test was performed with the player unplugged from the mains
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Old 20th Nov 2017, 11:36 am   #36
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Default Re: Dansette Challenge 100 Switches

Hi it was unplugged from the mains. It would help if there was a wiring diagram enclosed with the item.

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Old 20th Nov 2017, 12:09 pm   #37
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Default Re: Dansette Challenge 100 Switches

Are you referring to the player or the new switch?
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Old 20th Nov 2017, 12:11 pm   #38
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Default Re: Dansette Challenge 100 Switches

The switch will be wired as shown in the circuit excerpt by Station X in post# 26. This is(was) the standard way to wire double pole mains switches in valve radios & record players. With the switch closed (i.e. ON) there should be continuity between (a) the Brown mains lead and the connections to the mains transformer & motor, and (b) between the blue mains lead and the other side of the connectios to the two components. If by any chance an old type mains lead is fitted, the corresponding colours are Red(L) & Black(N). The resitance between Live and neutral with the switch ON will be fairly low due to the resistances of the Transformer Primary and the motor.
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Old 20th Nov 2017, 12:17 pm   #39
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Default Re: Dansette Challenge 100 Switches

You will contintue to struggle with this unaided so you must allow us to help you.
1: Post a photo of how you wired up the switch. Already suggested.
2: Or seek the direct help of a local Member from this Forum (there a Section here for this). Already suggested.
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Old 20th Nov 2017, 12:28 pm   #40
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Default Re: Dansette Challenge 100 Switches

Hodbod.

As has been advised in several posts we need a picture of the switch and its wiring so we can identify wire colours, wire functions and the tags on the switch.

Without this it is nigh on impossible to help you with what should be a simple task.

You'll find details of how to post pictures in the forums in this thread:-

http://www.vintage-radio.net/forum/s...ad.php?t=77650
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