Bush DAC90A live wire? - UK Vintage Radio Repair and Restoration Discussion Forum

poorcol1964 · 10th Dec 2018, 8:02 pm

Hi just need to know which wire input is LIVE.

Red or yellow/red?

Nuvistor · 10th Dec 2018, 8:14 pm

Quote:

Originally Posted by poorcol1964

Hi just need to know which wire input is LIVE.

Red or yellow/red?

If that’s the mains lead it appears to have been replaced by one with none standard colours.

Use a multimeter to trace the live wire, don’t guess, better still put the correct lead on the radio.

If it’s not the mains lead, more information and photo may help.

poorcol1964 · 10th Dec 2018, 8:22 pm

in the chassis back of the mains pins ? see photo

McMurdo · 10th Dec 2018, 8:23 pm

The DAC90A should have a reversible mains connector, so might be wise to mark its orientation if you plan on doing anything with the back cover off and dont want the chassis to be live

Station X · 10th Dec 2018, 8:34 pm

SET NOT CONNECTED TO MAINS SUPPLY.

Connect a meter on ohms range one lead to chassis the other to each wire in turn. The wire with the LOWEST resistance to earth should be connected to the NEUTRAL pin of the mains plug.

poorcol1964 · 10th Dec 2018, 9:38 pm

thanks ,

G6Tanuki · 10th Dec 2018, 9:48 pm

Quote:

Originally Posted by poorcol1964

Hi just need to know which wire input is LIVE.

Red or yellow/red?

It doesn't matter: as designed they had a reversible power-input connector and would frequently have been connected to unpolarised mains-outlets (including bayonet lightbulb-sockets) so will work 'either way round'.

[Always treat the chassis as live, irrespective of what the supply wiring is doing!]

Stuart R · 11th Dec 2018, 8:37 am

One of the two DAC90As I have here has a red/yellow mains lead under the black jacket, so could they have left the factory like that?

(Are we talking the plug-in mains lead colours or just the under-chassis wiring colours?)

SR

AC/HL · 11th Dec 2018, 4:07 pm

Under chassis according to post 3

poorcol1964 · 11th Dec 2018, 4:29 pm

sorted now , all working apart from 1 bulb holder .
have changed the speaker and bulb holder wires
possibly bad connection between the layers ?

10th Dec 2018, 8:02 pm	#1
poorcol1964 Retired Dormant Member Join Date: Oct 2018 Location: Norwich, Norfolk, UK. Posts: 19	Bush DAC90A live wire? Hi just need to know which wire input is LIVE. Red or yellow/red?

10th Dec 2018, 8:22 pm	#3
poorcol1964 Retired Dormant Member Join Date: Oct 2018 Location: Norwich, Norfolk, UK. Posts: 19	Re: Bush DAC90A live wire? in the chassis back of the mains pins ? see photo Attached Thumbnails

10th Dec 2018, 8:23 pm	#4
McMurdo Dekatron Join Date: Jun 2009 Location: Staffordshire Moorlands, UK. Posts: 5,271	Re: Bush DAC90A live wire? The DAC90A should have a reversible mains connector, so might be wise to mark its orientation if you plan on doing anything with the back cover off and dont want the chassis to be live __________________ Kevin

10th Dec 2018, 8:34 pm	#5
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Bush DAC90A live wire? SET NOT CONNECTED TO MAINS SUPPLY. Connect a meter on ohms range one lead to chassis the other to each wire in turn. The wire with the LOWEST resistance to earth should be connected to the NEUTRAL pin of the mains plug. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

10th Dec 2018, 9:38 pm	#6
poorcol1964 Retired Dormant Member Join Date: Oct 2018 Location: Norwich, Norfolk, UK. Posts: 19	Re: Bush DAC90A live wire? thanks ,

11th Dec 2018, 8:37 am	#8
Stuart R Heptode Join Date: May 2011 Location: Letchworth Garden City, Hertfordshire, UK. Posts: 693	Re: Bush DAC90A live wire? One of the two DAC90As I have here has a red/yellow mains lead under the black jacket, so could they have left the factory like that? (Are we talking the plug-in mains lead colours or just the under-chassis wiring colours?) SR Last edited by Stuart R; 11th Dec 2018 at 8:40 am. Reason: Afterthought...

11th Dec 2018, 4:07 pm	#9
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: Bush DAC90A live wire? Under chassis according to post 3

11th Dec 2018, 4:29 pm	#10
poorcol1964 Retired Dormant Member Join Date: Oct 2018 Location: Norwich, Norfolk, UK. Posts: 19	Re: Bush DAC90A live wire? sorted now , all working apart from 1 bulb holder . have changed the speaker and bulb holder wires possibly bad connection between the layers ?