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Another project - Philco Tropic 42-788
#30

Good news: The wiring is nearly complete!

[Image: http://www.philcoradio.com/images/phorum...88_038.jpg]

[Image: http://www.philcoradio.com/images/phorum...88_039.jpg]

Everything is now reconnected save for the audio output transformer and one capacitor.

And that leads me to the not-so-good news...the audio output transformer has one half bad primary. Icon_sad I could have sworn that I tested both sides of the primary, as well as the secondary, before removing it...Well, that's the way it goes.

Rummaging around through my stash of stuff, I found a good push-pull output from a Philco 46-1226. It doesn't match exactly, but may be better than nothing right now. It is intended for use with push-pull 6K6G tubes, and the 42-788 uses push-pull 6V6G tubes.

(I just remembered that I have a 53-960 parts chassis, and if its audio output tranny is good, it may be a better match for the 42-788. I'll have to do some further research on that.)

Nevertheless, I installed ten of those bayonet base LEDs with flexible leads, sold by Pinball Life. Having connected an AC cord, I left most of the tubes out of the set and fired it up.

[Image: http://www.philcoradio.com/images/phorum...88_041.jpg]

[Image: http://www.philcoradio.com/images/phorum...88_040.jpg]

[Image: http://www.philcoradio.com/images/phorum...88_042.jpg]

The light moves as the band switch moves, illuminating only the selected band on the dial.

So this is encouraging. Tomorrow, I will install an audio output transformer...and I just might give the radio its first trial run. Icon_think

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
RE: Another project - Philco Tropic 42-788 - by Ron Ramirez - 01-22-2015, 09:37 PM



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