Sir Steve . . . . .

I feel sure that the old style of mini-ovaloid-black connector plug which RCA used to use, is that to which
you are most assuredly referring.

Here in this units application, you can see it being used both for low level audio ( phono cart input) as
well as its outputting for an intermediate level audio.

Also, the keying of the center ground pin, such that it was a bit off center. As is being easily discernible on the unused tape input jack.

Color coding of red for right channel and clear for left channel.

And, Warren, upgrade that "Ortoponic" up to the full fledged Orthophonic High Fidelity

Seems like the best sounding little unit around that timeframe was the RCA unit I have shown at the bottom,
even though its electronics for the amp was no more than a simple AC-DC amplifier.

In my personal estimation, it was the Bose "Soundwave" of that time frame in a small unit.

However, the speakers that they chose, along with utilization of two spatially dispersed hard cone tweeters, certainly helped in the overall sound
performance of the unit.

(Didn't go for those stick legs, however , with the possible one aspect of making them tolerable, was the their choice of gold
for their color.)


Visual References:

. . . . . 73's de Edd