SHIELDED BROWNING-DRAKE

Radio Record, Volume I, Issue 45, 25 May 1928, Page 13

SHIELDED BROWNING--DRAKE

The following list will ve a good guide, but a turn or two more and less should be also tried-the object is to use as few turns as possible without losing volume, and that is why the impedance of the yalve should not be too high, ; Primary Impedance. turns, 20,000 maeneeeeureeaeeaev ue 22° 18,000 eeuseccrcecvesee 20 16,000 Serer ereeneeuses 16 314,000 eevee eee aeerseeerae 15 12,000 Seer tereeeevaeee 14 10,000 @eeeteereataseseeas 13 A FINAL NOTE. FINAL advice to constructors is to buy good components-any make that has quality and is of the correct value. Some constructors appear to go and buy, say, variable condensers, with little care as to the value of their eapacity, and then comes along a letter of inquiry as to how the wrong valves can be worked in. Such tacties will not suit this receiver very well, so make sure of what you want, and save the dealer the trouble of guessing for you. The list given last week will be found a good guide with approximate prices, and all required yalues of condensers, etc. Note that if the absorption control of tickler is to be adopted, instead of a tickler knob, a carbon rheostat will be required, giving a maximum of 50 ohms. The writer feels confident that those who put the necessary care into the sonstruction of this receiver will have 1 unit that they will be very pleased ‘o possess, and. one with which some , 00d long-distance work will be per4ormed. Last week, in the section dealing with the R.F. transformer, what should hi.ve been the fourth line appeared as ths sixth. Yonstructors are asked to note that thé height of the panel is 84 inches, as stated in the first column and in list. Bight inches appeared on the diagram in error.