| Electronics > Beginners |
| Identify giant transformer from 1978 tape reel |
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| MarkF:
I found a RTT-116 transformer on eBay. It only has one primary winding. So, we can not use it as a wire color reference. I am beginning to think @soldar is right... BLK and BRN for 120V BLK and VLT for 220V BLK and GRY for 240V |
| 6PTsocket:
--- Quote from: MarkF on May 03, 2019, 10:48:16 pm ---Close. Hers has two extra wires (purple and black). Maybe two primaries for 120V or 240V operation? pg.59 says power transformer part no. RTT-115 --- End quote --- The AC line in Japan is 100 volts so one extra primary tap might be for that. I recall Japanese hi fi equipment that had a 100 volt tap for domestic consumption Sent from my SM-G900V using Tapatalk |
| MarkF:
Thanks. I thought there was another standard voltage that I've seen as selectable on some equipment. (i.e. 100VAC / 120VAC / 220VAC / 240VAC) |
| schmitt trigger:
You are correct. 100 VAC is the household voltage in Japan. |
| MarkF:
A little bored. So, I thought I would summarize our findings. It hasn't been obvious but the BLU to YEL winding could be used for another 30VAC. |
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