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Old 13th Dec 2021, 11:23 am   #66
ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
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Default Re: Grundig TK27 - Low audio output

Quote:
Originally Posted by Phantomrose1999 View Post
So it looks like the head is constantly connected to the amp, even without the play being pressed, and i know it should not do this.
So far as I can make out, looking at the schematic the head is connected to the amplifier without start being selected and any signal from the head will find it's way to the audio output stage, eg: for head tracks 1-2 >> at1,4 & at1,5 >> EF86 >> ECC81 >> so10 >> so8 >> at3,5 >> EL95.

But...

Without start being selected the tape recorders loudspeaker should be muted due to the switch contacts of st3 which should closed and the output to the radio socket should be disconnected because the contacts of st1 should be open.

Lawrence.

Last edited by ms660; 13th Dec 2021 at 11:31 am. Reason: punct.
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