12-07-2019, 08:10 PM
The audio output transformer on my 40-180 looks like it's been getting rather warm so I decided to replace it as long as I'm recapping the set. I went with a Hammond 125C universal push pull transformer but I'm not sure that I understand the wiring diagram correctly. It appears that I would connect the secondary to pins 4&6 to get 12,800 impedance with an 8 ohm speaker.
The existing transformer appears to only have one primary wire coming from the power transformer. The Hammond has 3 wires on the primary side, a red, a blue, and a brown wire. Not sure how that works ?
Here's a link to the transformer; http://www.hammondmfg.com/125.htm
And the schematic info; http://www.nostalgiaair.org/PagesByModel...013332.pdf
The existing transformer appears to only have one primary wire coming from the power transformer. The Hammond has 3 wires on the primary side, a red, a blue, and a brown wire. Not sure how that works ?
Here's a link to the transformer; http://www.hammondmfg.com/125.htm
And the schematic info; http://www.nostalgiaair.org/PagesByModel...013332.pdf
