WS-19 transformer? - UK Vintage Radio Repair and Restoration Discussion Forum

llama · 27th Apr 2020, 11:07 am

Looking in my stash for an earpiece the other day I found an assembly I put together as a teen - an earpiece sunk into the end of a Hunts electrolytic case. Much to my surprise, there was also inside the little transformer shown. My suspicion is that I re-purposed a transformer from a stripped-out B-set from a 19 set but I have no recollection of using it. I do recall removing a B-set from a Mk II 19 set (like most other owners).

The wires are 2x black, 1x red, 1x beige, 1x cream. They may have contrasting additional colours in the insulation but the wax/varnish makes this unclear.

black to black: 6 Ohms
red to beige: 6.7 kOhms
cream: n/c

3.5cm wide, 3cm tall.

Any ID comments, please?
Graham

Orakle42 · 27th Apr 2020, 1:34 pm

Try T4A or T4B, colours are probably altered by the protective spay.
The "no connection" is a screen.

Orakle42

llama · 27th Apr 2020, 6:16 pm

Thanks for that. Yes, seems very likely. Wireless for the Warrior shows both and I think the numbering scheme means they are the same spec but used in different positions. WftW doesn't give the spec for a T4x but the resistances given would tally with a mic transformer.

I seem to recall that this transformer is prone to either green spot or burnt out fine-wire-gauge secondary due to leaky capacitors. I may need it at some stage to fettle one of my Mk IIIs!
Thanks again. Graham

27th Apr 2020, 11:07 am	#1
llama Octode Join Date: Jun 2006 Location: St Osyth, Nr Clacton, Essex, UK. Posts: 1,482	WS-19 transformer? Looking in my stash for an earpiece the other day I found an assembly I put together as a teen - an earpiece sunk into the end of a Hunts electrolytic case. Much to my surprise, there was also inside the little transformer shown. My suspicion is that I re-purposed a transformer from a stripped-out B-set from a 19 set but I have no recollection of using it. I do recall removing a B-set from a Mk II 19 set (like most other owners). The wires are 2x black, 1x red, 1x beige, 1x cream. They may have contrasting additional colours in the insulation but the wax/varnish makes this unclear. black to black: 6 Ohms red to beige: 6.7 kOhms cream: n/c 3.5cm wide, 3cm tall. Any ID comments, please? Graham Attached Thumbnails __________________ Half my stuff is junk - trouble is, I don't know which half! Last edited by llama; 27th Apr 2020 at 11:08 am. Reason: size matters

27th Apr 2020, 1:34 pm	#2
Orakle42 Pentode Join Date: Nov 2015 Location: Maidstone, Kent, UK. Posts: 131	Re: WS-19 transformer? Try T4A or T4B, colours are probably altered by the protective spay. The "no connection" is a screen. Orakle42

27th Apr 2020, 6:16 pm	#3
llama Octode Join Date: Jun 2006 Location: St Osyth, Nr Clacton, Essex, UK. Posts: 1,482	Re: WS-19 transformer? Thanks for that. Yes, seems very likely. Wireless for the Warrior shows both and I think the numbering scheme means they are the same spec but used in different positions. WftW doesn't give the spec for a T4x but the resistances given would tally with a mic transformer. I seem to recall that this transformer is prone to either green spot or burnt out fine-wire-gauge secondary due to leaky capacitors. I may need it at some stage to fettle one of my Mk IIIs! Thanks again. Graham __________________ Half my stuff is junk - trouble is, I don't know which half!