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Identify The Thorn (T.C.E) LOPT

 
In The Workshop
Last Post by Jayceebee 5 years ago
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 crustytv
(@crustytv)
Posts: 12218
Vrat Founder Admin
Topic starter
 

Have a rummage in the spares dept this afternoon and came across this B&W TV lopt a pattern part to Thorn spec. Looking to the Thorn lads John (jayceebee) & Jim (jcdaze) to help identify which chassis this is for. Without delving into countless manuals my gut is saying 1600 series. The LOPT looks new and is dated 3/6/1979.

tce1
tce2
tce3
 
Posted : 02/12/2020 3:09 pm
Topic Tags
T.C.E. Thorn LOPT Line output transformer
 Katie Bush
(@katie-bush)
Posts: 4858
Member Deactivated Account
 

Well, I'm out! - It's not even a jellypot!

 
Posted : 02/12/2020 3:30 pm
 jcdaze
(@jcdaze)
Posts: 174
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From a not very reliable memory I'm going to say it's for a 1690 series. Now I'm going to have find the manual to check that!

 
Posted : 02/12/2020 4:24 pm
Mikey66, Mikey66 and Mikey66 reacted
 jcdaze
(@jcdaze)
Posts: 174
Reputable Member Registered
 

I've been and found the circuit diagram covering the models below;

1690 12" models 3845,3848,6845,

1691 14" models 3840,3847,6840 ,

1694 12" models 3857,3858 

Originally a different transformer was fitted depending on whether it was a 12" or 14" model. A common transformer was then made available and it's pt. no. was 06D3-048-003. The pinouts are the same as the one you've got. 

 
Posted : 02/12/2020 5:04 pm
Jayceebee, Jayceebee and Jayceebee reacted
 Katie Bush
(@katie-bush)
Posts: 4858
Member Deactivated Account
 

Well now, could it be for Thorn 1615B (3852), as in the set that Mikey66 forwarded to me?

 
Posted : 02/12/2020 5:06 pm
 Katie Bush
(@katie-bush)
Posts: 4858
Member Deactivated Account
 

@jcdaze

Ah, right! I didn't think it was that tiny, and looking at the photos from the 1615B, this LOPT looks deceptively the same (more conventional) shape as the outline printed on the PCB - The LOPT is out of sight on the component side.

 
Posted : 02/12/2020 5:09 pm
 Jayceebee
(@jayceebee)
Posts: 2118
Prominent Member Registered
 

Late in the day and I wasn’t 100% sure but I would have said 1690/1, the grommet on the EHT lead gives it away I think. Locates on the heatsink around the line stage.

 
Posted : 02/12/2020 5:36 pm
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Topic Tags:  T.C.E. (1) , Thorn (72) , LOPT (7) , Line output transformer (2) ,

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