dual audio inputs to speaker

[kk4lgt]

Hello,
I have a redio that outputs two separate outputs, one for upper sideband and on for lower sideband. Would a diode in each output to the speaker keep them isolated and allow it to work. The outputs are only used one at a time, not simultaniously.
Thanks Stan/kk4lgt

[fourfathom]

No, diodes will cause terrible distortion (I used to put a diode in my guitar amplifier output as a cheap fuzzbox).  Do these outputs drive a speaker directly?  If not, you can use a resistive combiner between the outputs and the amplifier, say a 100 Ohm resistor in series with each output, then connected together at the amplifier input.   Even if the radio outputs each drive their own speaker (?)  you can try using 10 Ohm resistors for the combiner, and there should be no ill effects.  Make sure the resistors can handle the power though.

What kind of radio has separate USB and LSB outputs?  Never heard of this, and don't understand why you would want to combine those outputs.

[kk4lgt]

Thank you for your help. The radio is a r-1051b /urr receiver from the USN. The speaker output is 60ohm and I have a 60 to 8 ohm transformer on the lsb output right now feeding a small amp. Looking not to spend the money for another 60 to 8 ohm transformer and amp for usb.

[TimFox]

See  https://antiqueairwaves.com/nlee/r-1051_index.html

"USB" and "LSB" refer to the upper and lower sideband of a surpressed-carrier AM transmission.
"SSB", commonly used by amateur radio operators and others, uses one or the other of the two sidebands around a (missing) carrier frequency.
The two 600 ohm outputs on the back can be used for the two channels in the "ISB" (independent sideband) mode with different information on the two sidebands.
https://en.wikipedia.org/wiki/Independent_sideband.

Note that the two audio outputs are 600 ohm, not 60 ohm.
600 ohms is a common impedance level for audio line outputs.