music, guitars & other obsessions

Output Transformer Comparison

There were some recent discussion on the quality of the output transformer – vintage vs. modern, etc. It’s often been said that vintage Partidge OPT was hard to beat, but is it true? Pulling data from a couple of sources, I came up with the following comparison chart, it is pretty clear that there is indeed some truth to the Partridge’s legend… -3 dB at 80kHz!

OPT Comparison

OPT Comparison

Sources:

1) Transformer Shootout- Hammond vs Magnequest vs Dynaco vs HW

2) Partridge technical datasheets

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