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Repair of 1963 Gretsch 6161 amplifier. |
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The amplifier came to the workshop with the following error message! "The amplifier stopped playing and then there came smoke out of it". I found quite quickly a diagram. |
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The amplifier came on the workbench, it is slightly spoiled by its nearly 60 years. |
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The amplifier was opened and troubleshooting could begin. |
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It is a "US" model, so the importer had mounted the "Step Down" traffo at the bottom. |
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It was connected through the amplifier's internal switch and fuse, so the original traffo had no fuse. |
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The tubes were removed and I tried to measure some voltages I could not measure anything on the 5 volt winding. Shortly after came a strange bubbling sound from the transformer and it was very hot. |
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A new transformer was ordered from "Classic Tone" in the US. |
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The transformer is connected and a 2 amp. fuse is inserted to the transformer's 115 volts primary side. |
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After a check of all cables. I first mounted the rectifier tube and could be measured high voltage. |
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Then I mount the other tubes and measured the correct voltage on all tubes. |
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The amplifier is finished and sounds like a '60s tube amp should sound. |
