"Huh?"
"Sure. Before these darned things will work, this in-phase anode must be right on the beam. That means that you'll require a feed-back circuit from the final stage to feed the in-phase anodes. Could be done without detection, I suppose."
"Well, for one thing, we're going to get some amplification if we change the primary anode—so. That won't permit the thing to handle any power, but it will isolate the output from the input and permit more amplification. Follow?"
"Can we try it?"
"As soon as I get Terran Electric's permission."
"Here we go again!" groaned Walt.
"Yeah," said Don to Barney, "now you'll see the kind of birds you sold your gadget to."
They found Kingman and Farrell in conference. Channing offered his suggestion immediately, and Kingman looked it over, shaking his head.
"It is not permitted to alter, change, rework, or repair tubes owned by Terran Electric," he said.
"What are we permitted to do?" asked Channing.