Thread: Bush A.C.91
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Old 20th Jun 2017, 9:48 pm   #143
DonaldStott
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Location: Glasgow, UK.
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Default Re: Bush A.C.91

Some preliminary readings after a hard day at work and other challenges!

Valves removed.

Auto-transformer 250v tap to ground : 203 ohms

Output-transformer with speaker wires disconnected.

Primary : 549 ohms

Secondary : can't get a reading!

Surely this hasn't gone open circuit as well - what could have caused that?

Before disconnecting the speaker wires when I measured the Primary the speaker did crackle a bit. The speaker itself is measuring 3.3 ohms.
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