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Old 12th Oct 2019, 3:33 pm   #21
Join Date: Nov 2016
Location: Budapest, Hungary
Posts: 354
Default Re: Vintage Radio and Phonograph cutter schematic

Lawrence, a million thanks for this. Where did you get this manual? Looks like original one in pristine condition. This is fantastic and helping me heaps.

Really, thank you so much for sharing this.

With regards the cutter head, so the cutter head needs no DC that is why the 0.1uf is there and the AC comes from the 6v6GT plate / transformer primary.

Got it.

I am just playing with a thought in case the crystal head is gone which most likely will be a case, to rebuild tha cutter head with a piezo speaker element. But that I think from that output will not be possible but maybe a 4 ohm output from the secondary windings.. uuuh.. i am going to far here i guess..


PS: sems that the cathode bypass capacitors are also higher...instead of 10uF they are 20uf here.....such a great service manual !

Last edited by Levente; 12th Oct 2019 at 3:38 pm. Reason: missing
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