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Sets, Parts and Service Information Wanted (private buyers only, no swaps) If you need help obtaining components, sets or equipment, post a message here. Private buyers only - no traders. No swaps.

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Old 13th Jul 2018, 5:07 pm   #1
Dorian27
Triode
 
Join Date: Jun 2018
Location: Carmarthenshire, Wales, UK.
Posts: 37
Default U17204/1 transistor or equivalent

Can any one tell me where I can get a transistor for my dansette amp it is a Z109 board and the transistor no is U17204/1 or can any one give me an equivalent no for one please many thanks dorian27
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Old 13th Jul 2018, 5:35 pm   #2
GeoffK
Hexode
 
Join Date: Mar 2016
Location: Essex, UK.
Posts: 459
Default Re: U17204/1 transistor or equivalent

This is a NPN driver transistor. BC107, BC108 or BFY50, BFY51, BFY52 are suitable replacements. Check the output transistors base bias current is set to correct value. If the driver transistor has failed then the cause should be investigated first as the driver is usually reliable, it is the output transistors that are more likely to fail. These can fail when the base bias variable resistor goes high resistance or open circuit.
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Old 13th Jul 2018, 11:10 pm   #3
Dorian27
Triode
 
Join Date: Jun 2018
Location: Carmarthenshire, Wales, UK.
Posts: 37
Default Re: U17204/1 transistor or equivalent

Thanks very much
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