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FERNSEH · 2nd Jul 2018, 1:35 pm

I mentioned in post No.35 that there has been three attempts by Decca to effect a system switch actuating circuit.
The attachment shows my interpretation of the switch circuit in the Decca we are currently discussing. In the Trader service sheet 1656/T260 for the DR101 the circuit diagram shows us that a smoothing choke is disconnected leaving the other energised. In the diagram that accompanies this post a choke is shorted out leaving the other energised.
The circuit of the switch circuit in the earlier DR31 is also attached with this post. How does it work?

DFWB.

2nd Jul 2018, 1:35 pm	#39
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Decca DR101 dual standard TV I mentioned in post No.35 that there has been three attempts by Decca to effect a system switch actuating circuit. The attachment shows my interpretation of the switch circuit in the Decca we are currently discussing. In the Trader service sheet 1656/T260 for the DR101 the circuit diagram shows us that a smoothing choke is disconnected leaving the other energised. In the diagram that accompanies this post a choke is shorted out leaving the other energised. The circuit of the switch circuit in the earlier DR31 is also attached with this post. How does it work? DFWB. Attached Thumbnails Last edited by FERNSEH; 2nd Jul 2018 at 1:50 pm.