Transformer Secondary Test 3.5V instead of 3.3V on Terminal 12 and 13

Jimb0 · 3285

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Offline Jimb0

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on: May 09, 2018, 10:52:27 AM
Hi. I'm currently performing a secondary test on the transformer for terminal 12 and 13. The manual says its suppose to read 3.3V AC. I'm getting 3.4V then it goes up to 3.5V. I double checked the wiring and made sure it was for 120V outlet.

Is this normal?
« Last Edit: May 09, 2018, 10:54:27 AM by Jimb0 »


Offline Jimb0

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Reply #1 on: May 09, 2018, 10:59:52 AM
I checked the other measurements as well.

I'm also getting 3.5 on 11/14 

6.6v on 9/15                 6.3v normal
168v on 20/19              161v normal


Offline Jimb0

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Reply #2 on: May 09, 2018, 11:12:57 AM
N/m. I see that there is a +-10% next to each voltage. Doh!


Offline Doc B.

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Reply #3 on: May 09, 2018, 11:49:51 AM
You didn't post your measured AC mains voltage. It's probably a little higher than 120V. Small variations there will cause small variations on the secondary readings.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

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