Yaesu FT-2900R Getting Lower Voltage Than Supplied

Submitted ⁨⁨3⁩ ⁨hours⁩ ago⁩ by ⁨timkenhan@sopuli.xyz⁩ to ⁨amateur_radio@lemmy.radio⁩

Hi everyone, is there a Yaesu rig user in the house?

I just got this beat up FT-2900R for cheap. It had a bunch of problems that I managed to fix, but one remains without a solution in sight.

For now, almost everything works normally, except for the fact it’s showing considerably less voltage than the supply. During the start-up, it shows the voltage exactly as supplied only for a brief moment (long enough for me to read it) before droping around 3-4 volts. As the result, my transmit power gets cut-off due to the low voltage.

I even tried changing all the thru-hole caps, to no avail.

Not sure if this matters, but I’m powering it with a Meanwell style SMPS.

Anyone familiar with this issue?

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Comments

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Buelldozer@lemmy.today ⁨33⁩ ⁨minutes⁩ ago
I’d guess that either your supply can’t deliver the 15 Amps the radio needs or the radios internal voltage regulator has a problem.

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alt_xa_23@midwest.social ⁨1⁩ ⁨hour⁩ ago
Have you verified it isn’t a power supply problem? If you have a battery handy, that’d be an easy way to check. I’d also measure the voltage at the radio’s power port.

I’m not very familiar with yaesu rigs, so I don’t have any ideas on the radio side.

Good luck

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