Continuity Issue

H

hankspencer

Member
Working on a JCM800 clone and am running into a weird continuity issue in testing. I am getting continuity between ground and both the tip and sleeve on the speaker output. Does anyone see any glaring issues? I'm sure that I am missing something dumb but would like some extra eyes to take a peek. Thanks!
 

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Isn't that to be expected, given the output towards the speaker have a very low impedance, like 4 or 8 ohms? I never built an amp, so I might be wrong. But if there's just 4 Ohms or 8 between your DMM pins it might just start beeping.
 
I just pulled the cable out of my speaker (amp was off) and measured sleeve and tip for continuity. DMM started beeping and showed 4 to 9 Ohms resistance.
 
Also, anything attached directly to a transformer will usually not give you useful continuity readings.

* same for electric motor windings, though they don’t come up quite as often in pedals/amps;)
 
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