04-22-2014, 11:52 PM
I used my LCR meter to look at the 3537 transformer used in Philco 111. The Table on Chuck's website does not list inductances.
The primary inductance is about 25H, +/- 2H at 1000Hz.
The one half secondary is 93H to 100H, which makes the full one about 180 to 200H.
The leakage inductance is 165mH.
This makes the primary and leakage data closest to Hammond 124B.
Of course there is the discrepancy of 1:4 for Philco and 1:3 for Hammond's turns ratios.
The primary inductance is about 25H, +/- 2H at 1000Hz.
The one half secondary is 93H to 100H, which makes the full one about 180 to 200H.
The leakage inductance is 165mH.
This makes the primary and leakage data closest to Hammond 124B.
Of course there is the discrepancy of 1:4 for Philco and 1:3 for Hammond's turns ratios.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
