Show united state states vacuum tube rube bet best while it IJ Is true that american made v a aum tubes are as so cum c jm pared with european the fact remains re agns that our tabes tubes are far more desirable destra tle than the usual run of european tubes says the scientific ameri amert can call our tubes have better and neater and their they run more uniform as regard regards perform ce in fact for a given 1 degree of amplification it will be found that lees less american tubes will w 11 be required to do lie the same work than if european tubes were usail |