Rewind Required: Volksempfganger VE301 DYN Mains Transformer - UK Vintage Radio Repair and Restoration Discussion Forum

RoundyMooney · 29th Dec 2024, 6:31 pm

Hi folks,

Looking to get one of the above rewound as it's tried to start it's own lightshow, even at 100v on the variac/dim bulb...I'm assuming the HT winding is the outermost as the other heater winding is fine, and mains current draw (i.e. primary) is steady.

It's for a paying customer who is happy to pay the going rate!

Not sure if Ed or Mike are still active in tis regard, and don't want to disturb them if not, so posting here in a more general sense.

Thanks in advance!

Station X · 29th Dec 2024, 8:55 pm

I've restored two of these sets.

Are you sure that there's no load on the HT winding, does it still overheat with the valves removed? The smoothing capacitor "block" in these radios can go short- circuit. The transformer is well constructed.

The rectifier valve can go short-circuit too.

RoundyMooney · 29th Dec 2024, 9:27 pm

Hi Graham-thank you as ever.

I fear not. All three smoothers replaced/restuffed, and the rectifier was out.

I have healthy heater voltage on the other winding.

There is significant evidence of previous exposure to moisture on the chassis. A lot of rust.

Having googled I see little talk of trafo failure which your experience supports.

Please see video:here.

RoundyMooney · 2nd Jan 2025, 7:58 pm

Just a quick bump on this-I have three audio output transformers from the spares pile to be done as well-so four jobs in total if anyone is willing.

Temporalnexus · 3rd Jan 2025, 8:15 pm

I know someone who has original spares for these.

Drop me a message and I’ll forward you his details

RoundyMooney · 3rd Jan 2025, 9:28 pm

Thanks Graham, Ed has been in touch and a rescue effort is imminent!

29th Dec 2024, 6:31 pm	#1
RoundyMooney Tetrode Join Date: Apr 2007 Location: Cork, Ireland Posts: 90	Rewind Required: Volksempfganger VE301 DYN Mains Transformer Hi folks, Looking to get one of the above rewound as it's tried to start it's own lightshow, even at 100v on the variac/dim bulb...I'm assuming the HT winding is the outermost as the other heater winding is fine, and mains current draw (i.e. primary) is steady. It's for a paying customer who is happy to pay the going rate! Not sure if Ed or Mike are still active in tis regard, and don't want to disturb them if not, so posting here in a more general sense. Thanks in advance! __________________ Putting the smoke back into antiquated "junk" since 1977

29th Dec 2024, 8:55 pm	#2
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 22,760	Re: Rewind Required: Volksempfganger VE301 DYN Mains Transformer I've restored two of these sets. Are you sure that there's no load on the HT winding, does it still overheat with the valves removed? The smoothing capacitor "block" in these radios can go short- circuit. The transformer is well constructed. The rectifier valve can go short-circuit too. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

29th Dec 2024, 9:27 pm	#3
RoundyMooney Tetrode Join Date: Apr 2007 Location: Cork, Ireland Posts: 90	Re: Rewind Required: Volksempfganger VE301 DYN Mains Transformer Hi Graham-thank you as ever. I fear not. All three smoothers replaced/restuffed, and the rectifier was out. I have healthy heater voltage on the other winding. There is significant evidence of previous exposure to moisture on the chassis. A lot of rust. Having googled I see little talk of trafo failure which your experience supports. Please see video:here. __________________ Putting the smoke back into antiquated "junk" since 1977 Last edited by RoundyMooney; 29th Dec 2024 at 9:41 pm.

2nd Jan 2025, 7:58 pm	#4
RoundyMooney Tetrode Join Date: Apr 2007 Location: Cork, Ireland Posts: 90	Re: Rewind Required: Volksempfganger VE301 DYN Mains Transformer Just a quick bump on this-I have three audio output transformers from the spares pile to be done as well-so four jobs in total if anyone is willing. __________________ Putting the smoke back into antiquated "junk" since 1977

3rd Jan 2025, 8:15 pm	#5
Temporalnexus Octode Join Date: Sep 2005 Location: Welshpool, Powys, Wales Posts: 1,398	Re: Rewind Required: Volksempfganger VE301 DYN Mains Transformer I know someone who has original spares for these. Drop me a message and I’ll forward you his details __________________ *33, 45, 78, around and around they go...*

3rd Jan 2025, 9:28 pm	#6
RoundyMooney Tetrode Join Date: Apr 2007 Location: Cork, Ireland Posts: 90	Re: Rewind Required: Volksempfganger VE301 DYN Mains Transformer Thanks Graham, Ed has been in touch and a rescue effort is imminent! __________________ Putting the smoke back into antiquated "junk" since 1977