RCI 2995 DX Max PCB Voltage?

nomadradio said:

14 Volts DC.

This is a little like "how many horsepower can I get from my 2-liter 4-banger?"

Depends on how long you want it to last before it croaks.

Higher supply voltage will goose the wattmeter a bit, but never enough for anyone at the other end of the conversation to tell any difference at all. The stress it places on the components will shorten the service life.

When the old-style linear-regulated power supply would fail, it would pump 24 Volts into the radio and especially the computer/display board. The computer was often the first casualty. Can't get the older versions of that board any more. This particular risk prompted our policy that any of those radios we service gets the power supply upgraded to a switchmode brick. Has all the protection circuits that the old linear supply did not. The ones sold as "12 Volt" usually turn up to 13.5 or so. Plenty enough to make the radio perform as intended.

73

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nomadradio said:

Post Script:

You wouldn't take a 5-Amp mobile radio and power it from a 30-Amp power supply with no fuse protection, would you?

Sure enough this is what the factory sold you. Or sold the original owner. But the mobile-radio circuit board at the heart of this base station has no separate protection from a big power supply.

This fix is a mandatory item on any radio like this that we see.

We sell this solution as a magnificently-overpriced fleabay sale item.

73

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