Re: Packard Radios

Posted by BigKev On 2015/3/5 14:42:22

Howard,

That may be possible. I guess you could do it either way. My initial design is going to be a gut job since my radios are already DOA, and I just want to get the basic prototype working with the Packard controls. After I get all that figured out then I can figure out if it can colocate with the stock radio circuit.

Once I get more into the radio and see how the controls are wire up, then I will know what is possible. But technically you should be able to put a relay in the project that would cut the power to the existing guts when this is powered up. The trick would be to electrically isolate the two so there are no electrical/ground paths through the unused circuit, which could cause some with of feedback or a distortion in the control values.

But for people with DOA radios, or have converted to 12v, then this would be a much cheaper option that either repair or sending in out for conversion.

I know the volume and tone are pretty much POT controls, but I think the tuner is more than likely a coil & ferrite rod control to set the oscillation on the AM signal.

Since this is pretty much all solid state and microprocessor controlled circuitry, it should be pretty power efficient (3.3 & 5v). Only thing using any substantial power would be the AMP circuitry to drive the speaker(s).