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Old 13th Dec 2021, 2:30 pm   #68
Phantomrose1999's Avatar
Join Date: Mar 2008
Location: Melbourne, Victoria, Australia
Posts: 261
Default Re: Grundig TK27 - Low audio output

Originally Posted by ms660 View Post
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.


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.

Would you have a clear scan of the switch bank locations please ? I only have a very poor German scan that is very blurred. I want to check the stated speaker switch
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