The Birmingham age-herald., 1922-08-06

 ters from our readers. We want to see how much this page is enjoyed and we also want to have any sug- gestion you want to make about 1t. If you have nc suggestion to make. let US near from you as to what kind of set you have, whether you made 1t or not Tell us what stations you are hearing Let us have any news you want printed. We are trying to help the boys of this city who have sets to cooperate with each other through these columns. Take ad- vantage of this radio page.
 Rufus Jones, who lives on Fifteenth stret, Norwood, tells us that he re- | ceives local concerts over his crystal set each night Rufus is one of the boys who takes advantage of The Age Herald demonstrations each Sat urday.
 Joe Noble, who is also one of The Age Herald radio pupils. has crystal set. Joe lives on Eleventh avenue, north.
 We have a question from some one who just signed K. Y. N. Sounds like broadeasting station. doesn't it?) The questions reads more like rid dle than a radio question. It is as follows: If a two-stage amplifier smplifies t50 times, how many times will q noe stage amplifier amplify? The answer sounds as mixed up | as the question, but I hope the one who asked 1t will understand. 1t ! a two stage amplifier did amplify 1 150 times, one-stage amplifier would amplfy fraction over 1923 l times, that is if both of the stages 1 increased the current sent into the l primary of their respective trans l former proportionally, but really q ! tw O. stage amplifier does not amplicy | 150 times, but onely 100 times. This changes the whole thing. The way l we find that a two-stage amplifler amplifies 100 times is from the two amplifiers separately. They are l each supposed to increase the volume l 10 times of that which comes into i the respective steps. Then we have l the following: A one-stage amplies
 
 I times when this current goes into the second step and that is increased I 10 times, making the current that | comes from the second stage of 1 amplification 100 times the original ! current from the detector. K. Y. N /, also had some questions about hook ! ups" etc, which we will answer fl he will repeat his question and send a self addressed, stamped envelope 1 Artman Snow, whose name has been mentioned on this page before for 1 having a vacuum tube set. has added 1 two stages of radio frequency ampli- 1 fication to his set which is growing very rapidly Artman is getting to- 1 gether the parts for an Armstrong i super-regenerative set which was | fully described on this page a short i while ago. We will be very glad indeed to hear from Artman when ht makes this set as to the results he | gets, etc. We would also appreciate 1t greatly if any of the other read CTS would let us know how they ar. l coming with their Armstrong super regenerative set, if any of them are making them.
 MT. Rhodes Boykin of the Kirk | patrick Sand and Cement company l has constructed for himself a very sensitive receiving set. This set has one stage of radio frequency, -nd I two stages of audio frequency ampli- 1 fication. The set uses the standard ] regeneratve hook up." having a | variometer in the plate circuit. There is variable condenser in series with l the aerial and one shunted across the seeondary of the vario-coupler. Thi. | hor set receives stations from all parts l of the country.
 Idora Park, an amusement park in California, has the worlds largest | loud speaker, which in operation may be heard over an era of 2s square miles. The horn is 35 feet in length and 12 feet square. Il | took 1000 feet of aeroplane spruce ito build this enormous loud speak CT, which was made by the Magma vox company.
 Gerald Permett, BIO Georgia street, south. has a crystal set an, is one of the many boys who at tend the Saturday radio school dowr here at The Age Herald every Satur day morning.
 T. O. Smith, who is another of Tn, Age Herald pupils, tells us that h. has crystal set.
 Billy Brubb. who has been men tioned on this page before, has add ed to his crystal set a double slid, tuning coil. which he made himself Billy lives in Highland Park.
 Buck Harris, who lives in High land Park. has a crystal set whici he built
 William Marsh has crystal SC which does not work as it should If William will bring his set dowI to The Age Herald next Saturda, morning at Il o'clock, we will b
 very glad to fix it for him. Thi also applies to any other boys wh, are having trouble with their sets
 It does not make any difference, what kind of set you have or wha is the matter with it, we will b. very glad to help you with it. with out cost to you.
 Many of you fellows who had set little while before the flood o radio hit the country, no doubt ha, loose coupler set which was high enough wave length instru pept fo catch Nor Ar1ir r