men rRF.orrxcv .iMri.irir.Ks 



Amim II iikn Willi Si;\ i:k.\i. Staci.s. "1"i;i;i) IV\( k" Ai 



195 



The i-xpt'rimenls so far have sliow ii, ili.it w iili mii- stai;i' cif ,iiii|)lil"ira- 

 tion ami witlt llu' ainpliCicT wurkiiii; into a dftcclDr tnla- witlidul 

 grid cdnilt'iiscr and leak, it is always jiossibk- to calculali.' iho amplitlca- 

 tion curve from the constants of the lubes and of the coils, ri'nardless 



Fig. 10 — Amplification Cur\'es of a Loosely Coupled Transformer Am(>lifi:;r Shnv 

 ing Effect of Coupling 



of whether the connection between liie amplifier .ind the detector 

 consists of a simple tuned circuit, a choke coil, two coupled circuits 

 or a loosely coupled transformer, the circuits being treated simply 

 as ordinary tuned circuits. 



Also the experiments have shown that a higher amplification can be 

 obtained in the .')(), 000 cycles region than around I .(MM). ()()() cycles, 

 as might be expected from formula 6. 



The next question is: What happens when more than one stage of 

 amplification is used? If, for instance, the amplification for one stage 

 is 10, will then the amplification for two stages be 100 or, in other 



