Dansette Major. - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Station X · 19th Jun 2019, 10:39 am

Fine. I've asked the OP whether there's an output transformer on the PCB in case it's been nicked.

george1960 · 19th Jun 2019, 11:22 am

I've taken a better picture of the board .

Station X · 19th Jun 2019, 11:29 am

That's good. I can see two transformers, but no valve!

Check that mains voltage is reaching the primary winding of the larger mains transformer via the two wires from the off/on switch. These wires should be terminated on the same tags of the off/on switch as the cable or wires feeding the deck.

ms660 · 19th Jun 2019, 12:28 pm

Just an observation....So far as I can make out from the photo's, the bottom left hand tag of the mains transformer is for the heater, the middle is common (ground) and the right hand one is for the HT to the rectifier, the top two tags are the primary.

I remember those rectifiers from my R&TV servicing days as selenium subs, REC50 series? or something else?

Lawrence.

Station X · 19th Jun 2019, 12:34 pm

Quote:

Originally Posted by ms660

Just an observation....So far as I can make out from the photo's, the bottom left hand tag of the mains transformer is for the heater, the middle is common (ground) and the right hand one is for the HT to the rectifier, the top two tags are the primary.

Lawrence.

I agree. Let's not forget that the original problem was that the white wire (heater) from the mains transformer went nowhere. If it hasn't been reconnected correctly that might account for the valve not lighting up.

We need some feedback from the OP regarding voltages on the primary and smoothers.

Edward Huggins · 19th Jun 2019, 1:25 pm

Quote:

Originally Posted by ms660

I remember those rectifiers from my R&TV servicing days as selenium subs, REC50 series? or something else?

Lawrence.

This suggests the original contact-cooled rectifier has been replaced with another device and a series resistor. I must say, the wiring looks very untidy.

vidjoman · 19th Jun 2019, 2:38 pm

And that wax capacitor needs changing as that can drag down the HT or short out the transformer depending on which actual version of the amp is fitted.

george1960 · 19th Jun 2019, 3:00 pm

Quote:

Originally Posted by Station X

That's good. I can see two transformers, but no valve!

Yes I had removed the valve at the time

Station X · 19th Jun 2019, 4:10 pm

I'd like to see the player working with the minimum of component changes before the OP embarks on any component replacement or rewiring.

george1960 · 19th Jun 2019, 8:51 pm

Quote:

Originally Posted by vidjoman

And that wax capacitor needs changing as that can drag down the HT or short out the transformer depending on which actual version of the amp is fitted.

First job I done was change that

Station X · 1st Jul 2019, 2:03 pm

Looks like another record player thread has bitten the dust. I hope the same fate didn't befall the player.

george1960 · 1st Sep 2019, 8:05 pm

Transformer is definitely shot .posting pictures. The black cables on the transformer are completely broken and very brittle. Almost break up in your fingers

Station X · 1st Sep 2019, 8:19 pm

It looked perfectly good back in post #1.

Does the primary winding have continuity? It could be that just the insulation has crumbled leaving the wires intact.

george1960 · 1st Sep 2019, 8:27 pm

There is continuity on one winding nothing on the other .because the view wasn't very good on post 1 that's why you thought it looked ok .

Station X · 1st Sep 2019, 8:33 pm

The transformer has three windings. Which one has no continuity?

It's immaterial, but it would be nice to know.

george1960 · 1st Sep 2019, 8:38 pm

I'm not to sure but need to know where to get a replacement

Station X · 1st Sep 2019, 8:43 pm

If you're not sure which winding lacks continuity I can't see how you can be sure that you're actually testing across the correct tags which Lawrence identified back in post #24.

I'll take it from you that the transformer is bust though.

You'd best contact Ed Dinning. He should be able to rewind it for you.

george1960 · 1st Sep 2019, 9:00 pm

I just want to get another one.

Station X · 1st Sep 2019, 9:39 pm

I see you have a wanted thread here:-

https://www.vintage-radio.net/forum/...d.php?t=159108

Edward Huggins · 2nd Sep 2019, 9:24 am

Quote:

Originally Posted by george1960

I just want to get another one.

It's not easy to replace these. Most possible replacements may be too big and quite expensive. This will mean re-siting them within the cabinet away from the chassis and, as a result, there will be long stray wiring. Best to get rewound

19th Jun 2019, 10:39 am	#21
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. Fine. I've asked the OP whether there's an output transformer on the PCB in case it's been nicked. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

19th Jun 2019, 11:22 am	#22
george1960 Pentode Join Date: Apr 2016 Location: Southampton, Hampshire, UK. Posts: 103	Re: Dansette Major. I've taken a better picture of the board . Attached Thumbnails

19th Jun 2019, 11:29 am	#23
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. That's good. I can see two transformers, but no valve! Check that mains voltage is reaching the primary winding of the larger mains transformer via the two wires from the off/on switch. These wires should be terminated on the same tags of the off/on switch as the cable or wires feeding the deck. Attached Thumbnails __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

19th Jun 2019, 2:38 pm	#27
vidjoman Dekatron Join Date: Jun 2013 Location: East Sussex, UK. Posts: 3,326	Re: Dansette Major. And that wax capacitor needs changing as that can drag down the HT or short out the transformer depending on which actual version of the amp is fitted.

19th Jun 2019, 4:10 pm	#29
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. I'd like to see the player working with the minimum of component changes before the OP embarks on any component replacement or rewiring. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

19th Jun 2019, 12:28 pm	#24
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Dansette Major. Just an observation....So far as I can make out from the photo's, the bottom left hand tag of the mains transformer is for the heater, the middle is common (ground) and the right hand one is for the HT to the rectifier, the top two tags are the primary. I remember those rectifiers from my R&TV servicing days as selenium subs, REC50 series? or something else? Lawrence.

1st Jul 2019, 2:03 pm	#31
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. Looks like another record player thread has bitten the dust. I hope the same fate didn't befall the player. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

1st Sep 2019, 8:05 pm	#32
george1960 Pentode Join Date: Apr 2016 Location: Southampton, Hampshire, UK. Posts: 103	Re: Dansette Major. Transformer is definitely shot .posting pictures. The black cables on the transformer are completely broken and very brittle. Almost break up in your fingers Attached Thumbnails

1st Sep 2019, 8:19 pm	#33
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. It looked perfectly good back in post #1. Does the primary winding have continuity? It could be that just the insulation has crumbled leaving the wires intact. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

1st Sep 2019, 8:27 pm	#34
george1960 Pentode Join Date: Apr 2016 Location: Southampton, Hampshire, UK. Posts: 103	Re: Dansette Major. There is continuity on one winding nothing on the other .because the view wasn't very good on post 1 that's why you thought it looked ok .

1st Sep 2019, 8:33 pm	#35
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. The transformer has three windings. Which one has no continuity? It's immaterial, but it would be nice to know. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

1st Sep 2019, 8:38 pm	#36
george1960 Pentode Join Date: Apr 2016 Location: Southampton, Hampshire, UK. Posts: 103	Re: Dansette Major. I'm not to sure but need to know where to get a replacement

1st Sep 2019, 8:43 pm	#37
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. If you're not sure which winding lacks continuity I can't see how you can be sure that you're actually testing across the correct tags which Lawrence identified back in post #24. I'll take it from you that the transformer is bust though. You'd best contact Ed Dinning. He should be able to rewind it for you. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

1st Sep 2019, 9:00 pm	#38
george1960 Pentode Join Date: Apr 2016 Location: Southampton, Hampshire, UK. Posts: 103	Re: Dansette Major. I just want to get another one.

1st Sep 2019, 9:39 pm	#39
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: Dansette Major. I see you have a wanted thread here:- https://www.vintage-radio.net/forum/...d.php?t=159108 __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.