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Leon Crampin · 2nd Nov 2019, 4:55 pm

The switch puts a resistor in series with the capstan solenoid when it's fully engaged. This allows a high pull in current without overheating the solenoid in use. The other contacts probably actuate the muting relay so that the amplifier is enabled only when the tape is running at the required speed. It's a very long time since I worked on these splendid machines.

Leon.

2nd Nov 2019, 4:55 pm	#20
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,870	Re: Grundig TK920 3D Exploding Caps The switch puts a resistor in series with the capstan solenoid when it's fully engaged. This allows a high pull in current without overheating the solenoid in use. The other contacts probably actuate the muting relay so that the amplifier is enabled only when the tape is running at the required speed. It's a very long time since I worked on these splendid machines. Leon.