Dansette Major Restore - Page 4 - UK Vintage Radio Repair and Restoration Discussion Forum

Amxen50 · 23rd Jul 2017, 7:33 pm

hopefully this is all correct

Edward Huggins · 23rd Jul 2017, 8:19 pm

Looks like you have replaced the 3 in one capacitor with 2 new (black) caps. The only other cap that would need replacing is that for the tone control. Have you powered this up yet?

ms660 · 23rd Jul 2017, 8:21 pm

Which one is supposed to be the cathode bypass capacitor?

Lawrence.

ms660 · 23rd Jul 2017, 9:02 pm

If the red tag is supposed to be wired up as the HT reservoir capacitor and the yellow tag wired up as the HT filter capacitor then it looks as though all the electrolytics are connected up wrong.

Lawrence.

Amxen50 · 23rd Jul 2017, 10:51 pm

The 22uF at 25V the small one on top would be the filter capacitor is connected to the bottom

The top pin on the 32 32 is neutral so I've just connected the neutral end of the 22 to there. Then back to the board.

Amxen50 · 23rd Jul 2017, 10:59 pm

this may be a better shot

Amxen50 · 23rd Jul 2017, 11:07 pm

Quote:

Originally Posted by Amxen50

the 22uf at 25v the small one on top would be the filter capacitor is connected to the bottom

top and middle both connected to 32 and the bottom connected to the 22 25v ( small on top. all neutrals connected together at some point.

is that correct?

thanks mick

ms660 · 23rd Jul 2017, 11:31 pm

All connected wrong so far as I can make out from the photo's (see post#24 & #25) Don't apply any power.

Lawrence.

Amxen50 · 24th Jul 2017, 12:27 am

oh i think i see it. the middle connector want to be the small 22uf resistor, not the bottom connector,

ms660 · 24th Jul 2017, 10:08 am

So far as I can make out all the electrolytics are connected wrong.

Referring to the 1st photo in post#24 and looking at the photo in post#66 where the wires enter the board, the four holes that the wires from the electrolytics go into....

The top right blue wire is in the correct hole BUT on the print side of the board it should also be connected to pin 4 of the valve socket by using a bridging wire.

The brown wire from the +ve of the cathode bypass capacitor (the small single can) should go into the bottom right hand hole.

The blue wire from the red tag (HT reservoir) of the large electrolytic should go into the top left hole.

The blue wire from the yellow tag (HT filter) of the large electrolytic should go into the bottom left hole

Lawrence.

Amxen50 · 24th Jul 2017, 6:27 pm

Thanks for taking the time to reply Lawrence . I will rewire as your instructions

ms660 · 24th Jul 2017, 6:49 pm

No problem, just to be clear again, refer to the 1st pic in post#24....

The top blue circle point is the connection to the large can electrolytic capacitors -ve tag and the small can electrolytic capacitors -ve lead, also from that blue circle point you should connect an insulated jumper wire from it to the blue circle point on the right which leads to pin 4 of the valve socket.

The top yellow circle point should be connected to the red tag on the large electrolytic can.

The bottom yellow circle point should be connected to the yellow tag on the large electrolytic can.

The yellow circle point on the left should be connected to the +ve lead of the cathode bypass capacitor (the small single can electrolytic)

Lawrence.

23rd Jul 2017, 7:33 pm	#61
Amxen50 Retired Dormant Member Join Date: Jun 2017 Location: Bradford, West Yorkshire, UK. Posts: 29	Re: Dansette Major Restore hopefully this is all correct Attached Thumbnails

23rd Jul 2017, 8:19 pm	#62
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,327	Re: Dansette Major Restore Looks like you have replaced the 3 in one capacitor with 2 new (black) caps. The only other cap that would need replacing is that for the tone control. Have you powered this up yet? __________________ Edward.

23rd Jul 2017, 8:21 pm	#63
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Major Restore Which one is supposed to be the cathode bypass capacitor? Lawrence. Last edited by ms660; 23rd Jul 2017 at 8:44 pm.

23rd Jul 2017, 9:02 pm	#64
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Major Restore If the red tag is supposed to be wired up as the HT reservoir capacitor and the yellow tag wired up as the HT filter capacitor then it looks as though all the electrolytics are connected up wrong. Lawrence.

23rd Jul 2017, 10:51 pm	#65
Amxen50 Retired Dormant Member Join Date: Jun 2017 Location: Bradford, West Yorkshire, UK. Posts: 29	Re: Dansette Major Restore The 22uF at 25V the small one on top would be the filter capacitor is connected to the bottom The top pin on the 32 32 is neutral so I've just connected the neutral end of the 22 to there. Then back to the board.

23rd Jul 2017, 10:59 pm	#66
Amxen50 Retired Dormant Member Join Date: Jun 2017 Location: Bradford, West Yorkshire, UK. Posts: 29	Re: Dansette Major Restore this may be a better shot Attached Thumbnails

23rd Jul 2017, 11:31 pm	#68
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Major Restore All connected wrong so far as I can make out from the photo's (see post#24 & #25) Don't apply any power. Lawrence.

24th Jul 2017, 12:27 am	#69
Amxen50 Retired Dormant Member Join Date: Jun 2017 Location: Bradford, West Yorkshire, UK. Posts: 29	Re: Dansette Major Restore oh i think i see it. the middle connector want to be the small 22uf resistor, not the bottom connector,

24th Jul 2017, 10:08 am	#70
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Major Restore So far as I can make out all the electrolytics are connected wrong. Referring to the 1st photo in post#24 and looking at the photo in post#66 where the wires enter the board, the four holes that the wires from the electrolytics go into.... The top right blue wire is in the correct hole BUT on the print side of the board it should also be connected to pin 4 of the valve socket by using a bridging wire. The brown wire from the +ve of the cathode bypass capacitor (the small single can) should go into the bottom right hand hole. The blue wire from the red tag (HT reservoir) of the large electrolytic should go into the top left hole. The blue wire from the yellow tag (HT filter) of the large electrolytic should go into the bottom left hole Lawrence. Last edited by ms660; 24th Jul 2017 at 10:15 am.

24th Jul 2017, 6:27 pm	#71
Amxen50 Retired Dormant Member Join Date: Jun 2017 Location: Bradford, West Yorkshire, UK. Posts: 29	Re: Dansette Major Restore Thanks for taking the time to reply Lawrence . I will rewire as your instructions

24th Jul 2017, 6:49 pm	#72
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Major Restore No problem, just to be clear again, refer to the 1st pic in post#24.... The top blue circle point is the connection to the large can electrolytic capacitors -ve tag and the small can electrolytic capacitors -ve lead, also from that blue circle point you should connect an insulated jumper wire from it to the blue circle point on the right which leads to pin 4 of the valve socket. The top yellow circle point should be connected to the red tag on the large electrolytic can. The bottom yellow circle point should be connected to the yellow tag on the large electrolytic can. The yellow circle point on the left should be connected to the +ve lead of the cathode bypass capacitor (the small single can electrolytic) Lawrence.