New Super-Het.

Radio Record, Volume II, Issue 14, 19 October 1928, Page 2

New Super-Het.

ee Armstrong’s Latest. According to advice from America a further patent of considerable interest has been issued to Mr. BH. H. Armstrong, the inventor of the superhetero(lyvne receiver. The new patent is designed greatly to reduce the size of the receiver, and it is stated that it will permit of a reduction of three

UBLELERELGLEPEUS LOL EL ELE EDEL ELA ST SURE a eee sete esererns PPSISPSL Sse esereressreryeeseseeeneeeee valves in the set without any loss of efficiency. The "ull details of the improvements covered in the patent have not yet been made available, but according to brief reports the first valve in the receiver is made to perform the function of the frequency changing oscillator as well as the first detector. By other improvements it has been found possible to use only one intermediate amplifier between the first and second detectors, so that only three valves are required up to the secon. detector. In many cases it is stated that a fourth valve as a low frequency amplifier is all that is necessary to complete the receiver, and that two will give full loudspeaker volume from very distant stations. Thus Mr. Armstrong’s new superheterodyne receiver will have only four or five valves, instead of six or eight.