Tech Talk

Pye Black Box All Transister
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Return to top of page · Post #: 1 · Written at 5:49:30 PM on 7 January 2020.
	Rastas Location: Tailem Bend, SA Member since 6 January 2020 Member #: 2400 Postcount: 3
I have a Pye Black Box All Transistor on the bench. I've fixed the amp stage and the record player, but has not sound on the radio. The only service info I've been able to find is a 3 page circuit, component layaout and an enlargement of the label that is inside the units. All 3 are for a TS1 Mk3. My unit is either a Mk1,2,4,5 or 6. Not a 3 as the component values and layout are incorrect. Does anyone have a circuit for any version other than a Mk 3. Cheers

Return to top of page · Post #: 2 · Written at 6:38:01 PM on 7 January 2020.
	MonochromeTV Location: Melbourne, VIC Member since 20 September 2011 Member #: 1009 Postcount: 1182
I know of three circuit versions. Does this Black Box have germanium or black Fairchild silicon transistors?

Return to top of page · Post #: 3 · Written at 8:49:50 PM on 8 January 2020.
	Rastas Location: Tailem Bend, SA Member since 6 January 2020 Member #: 2400 Postcount: 3
The Detector Diode is an OA90. Nearly all transisters are 2N4121 Geraniums. And between the 2nd IF and the 2nd IF AMP is an AB7103 Zener Diode. Hope that helps. Cheers

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