Philco 48-1001 - 1948 vintage

[Pete Deksnis]

Originally Posted by Dave A

Mine is set for Philadelphia in the day. Ch's 3, 6, 10, 12. And 12 did not appear for long after this set was mfgd but the tab is there. A later addition?

And if anyone has a spare Philco 4-pin connector available, let me know.

Dave A

IIRC, as a driving-age teenager I saw channel 12 when it was commercial. That had to be between 1955 and the middle of 1957, although my mind may be transposing this with Newark's channel 13 as it also began as a commercial station before becoming the PBS' WNDT in 1962. In the summer of 1950 when we got our first TV, Philadelphia had only 3,6, and 10, so based on my memory anyway, it must have been added.

That 4-pin antenna connector is similar to the one used in a CT-100, although it uses only two wide pins. If it's compatible with your Philco, I can send you one.

Pete

[Don Lindsly]

Channel 12, in that era, was originally WDEL-TV with most programming originating from Wilmington. It transferred to new ownership as WVUE - The Broader View. It later went dark and returned to the air as an educational station with the transmitter relocated to the Phila tower farm in Roxborough.

Philco engineers believed fine tuning was unnecessary because its early TVs had an AFC circuit using voltage derived from the audio detector. The tuner oscillator should be set using a DC voltmeter in the AFC test jack. Set for 0 volts or just a touch negative since they tend to drift positive.

The fine tuner will not affect the sound detector voltage polarity on later TVs using intercarrier sound, so Philco reverted to traditional fine tuning.

That's a great example of an early TV.

Don