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Yaesu FT 736R Power Supply Tip


Staff member
Apr 6, 2005
Sierras Near Yosemite National Park
If your integrated power supply makes an audible noise when like a big hungry bee, especially when the output power is at a value from medium to maximum.

When you switch off the radio, the power supply sounds like a "zip, zip, zip"...

If so, please check the coil L2 on the primary side of it.
L2 should have a DC resistance of about 27 ohms. If not, the wire inside is broken and the power supply isn't working correctly.

Be shure that you have unplugged your radio from mains before dismantling!!! High voltage on the primary side of the power supply, be careful!!! When the supply is open, check the capacitors also like described in other modifications.


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