RCI 2990 Isuue

[Raccoon]

I have a friend with an RCI 2990 that has an issue which he can't figure out . So I thought I'd ask here , and see if anyone else might have any ideas as to what's going on with it .

He says that his 2990 works good on all the modes (AM,FM,USB & CW) like it should . But on Lower Sideband it has no receive ... it transmits fine on LSB , but it has no receive there.

Any ideas as to what might be causing this problem ??

 

[nomadradio]

D108.

It supplies power to the carrier oscillator in LSB receive.

73

 

[kc8mob]

D108.

It supplies power to the carrier oscillator in LSB receive.

73

Man you were Johnny on the spot with that one. That's great!

I have a collection of original RCI 2950/70s and if they take a dump beyond my ability then it's great to know there are some well versed, educated types around here

 

[Raccoon]

Thanks Nomad , I let him know and he said he's going to check it out . I'll let you know how he made out once he gets it done .

 

[Groundhog KSS-2012]

They are a good looking radio but, I've never dealt with one.

 

[nomadradio]

It's a 2950 radio. Add an amplifier, bigger speaker, 2 analog meters and more knobs. The original power supply was suicidal. The regulator would fail and pump 20-plus Volts into the radio. Would typically croak the computer chip that you can't buy, and other stuff besides.

We won't work on one without upgrading the power supply to a chinese switchmode "brick". They contain protection from current overload and from over voltage.

One more protection issue is a fuse for the radio chassis. You wouldn't hook up a 5-Amp mobile radio to a 25-Amp power supply without a fuse, would you? That's what the factory sold you.

This is the other mandatory upgrade for this model before we'll send it home.

73