1 to .001 microfarad were going to be the big problem, other components could be made fairly simply.The vacuum tubes, themselves, were not hard to build, just tedious. They used the same filament, a carbon fiber, as was used in the light bulbs. Now that they had collected elemental mercury at the sulfur mines, it was possible to build an effective vacuum pump, and they could use the "getter" principle to eliminate the last of the air in the glass envelope. The first tubes were very crude, but did work, so it took only about a year from start to finish to have a working prototype voice transmitter. Doug went for FM for its simplicity and inherent noise cancellation, so a lot of problems were solved before they ever cropped up.The other big project was a fixed wing aircraft. The airships had a lot of inherent problems that would disappear with fixed wings, but the planes were harder to design and build. Doug saw a long term continuing need for the airships, but he wanted the higher. Care for some?" Ruth asked Rene."I'd love some," answered Rene."How about the girls? I've got some Coke." Okay. But just a little bit."For the next half-hour or so, the two women sat at the kitchen table, chatting about the neighborhood as Ruth told Rene about the other neighbors, sharing all the gossip she knew. After awhile, they began to talk about themselves. It turned out that, like Rene, Ruth was also divorced, starting over again after a marriage that had managed to last almost 16 years. As they talked, Rene looked about the kitchen, admiring how nicely the room was decorated."I love the way your house looks. Such warm colors." Thank you," said Ruth. "I'm pleased with how it's all turned out. It was a lot of work, but it was worth it. Say, would you like to look at the rest of the house?" I'd love to," replied Rene. "Now you girls behave yourself down here while Mommy looks at the rest of Miss Ruth's house." If it's alright with you," said Ruth, "the girls can play out back..
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