RCI 2995 DX Max PCB Voltage?

[HavaV10]

Have a 2006 model RCI 2995 DX Power Supply is bad and going to put in a HP 75 amp PSU. What is the max voltage these radios can handle? Mine has the Toshiba 2290's in it. I just need a idea on what to set the power supply voltage to. Thanks for any suggestions.

 

[Amperex]

Here is info. http://www.rrcom.com/dustin/RCI-2995DX New Power Supply Upgrade.html

Meanwell 30 amp 15 volt power supplies will fit, low cost from Amazon vs article using a 40 amp power supply. Most adjust voltage to 14 volts DC.

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[HavaV10]

great thanks going with a HP hstns-p11 PSU in my 2995 DX.

 

[nomadradio]

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

 

[HavaV10]

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

thank you sir

 

[nomadradio]

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

 

[HavaV10]

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

HP 75 amp didn't work so well in my 2995. Ran way to hot and was heating up the whole radio. So installed a new LRS-600-12V power supply runs much much cooler. So far the 2995 is working fantastic. Set at 13.8V

 

[nomadradio]

That power supply is still about double what the radio needs. No way it will ever come close to breaking a sweat.

73