Unnecessary complications in a tube colour tv

[zeno]

In the olden days everyone used a different formula to
figure watts. The cheaper the unit the more exaggerated
the claim. Electrophonics were often 200W "peak music power".
Probably more like 5W per channel. IIRC in the late 70's
rules were passed standardizing things to RMS power.

73 Zeno

[dieseljeep]

Originally Posted by zeno

In the olden days everyone used a different formula to
figure watts. The cheaper the unit the more exaggerated
the claim. Electrophonics were often 200W "peak music power".
Probably more like 5W per channel. IIRC in the late 70's
rules were passed standardizing things to RMS power.

73 Zeno

They used to rate it by IPP. Instantaneous peak power.
It was rated at 100 watts, but it only had output transistors, similar to SK3004.

[zenith2134]

I have some early solid state Lafayette and Pioneer gear which states audio power in "PMPO", Peak music power output.

[zenith2134]

Back to TV discussion, I've seen many over-designed sets. With tubes, the color demod circuitry can be a pain to trace out and repair. but the power supplies. I notice that as TVs got lighter over the years, the switching supplies got more complicated in general. No longer do we see a big transformer with secondary taps and smoothing capacitors connected to diode rectification. Sonys had a lot of proprietary ICs in the Trinitron PSUs which made the set BER for the consumer. Shame to junk a set when the tube is still in good shape.