Radio Broadcast (May-Oct 1925)

RADIO BROADCAST ADVERTISER 165 RADIO 103 South Wabash Ave. EQUIPMENT Chicago, 111. Parts for Laboratory Model Super-heterodyne Price Each 2 Silver .0005 Low Loss Condensers No. 301 2 4" Moulded Dials — -Tapered Knobs. 1 U. S. L. d\ Ohm Rheostat 1 U. S. L. 240 Ohm Potentiometer . . 7 Insulated Top Binding Posts 1 Carter 102A Jack 1 Carter 101 Jack 1 Silver No. 21 0 Charted Transformers 1 Silver No. 21 1 Charted Transformers w/Condenser 1 Silver Oscillator Coupler No. 101 .. 7 Benjamin Spring Sockets (199 or 20IA?) 1.00 2 Thordarson 3^:1 Audio Transformer 1 On-off Switch $4.50 1.00 1.00 1.50 .05 .80 .70 8.00 8.00 2.50 4.00 .60 3 .5 MFD By-pass Condensers 2 .00025 Mica Condensers with Leak Clips 2 .002 Mica Condensers 1 .000025 Balancing Condensers 1 5 Meg Ohm Grid Leak 1 1 Meg Ohm Grid Leak 1 7 x 24 x iV' Bakelite Panel. Drilled, Grained, and Engraved (Specify with or without meter hole.) 1 7x23x5nOakBaseBoard, Bus-Bar, Spaghetti, Screws, Nuts, Solder.Lugs Price Each .90 .45 .40 1.50 .50 .50 7.00 1.50 Complete Parts for Silver Super-Laboratory Model— Total $63 . 60 Laboratory Model Blueprints .50 Silver Supers Consistently OutPerform All Others! The Seven-tube Silver Superheterodyne designed by the famous radio engineer, McMurdo Silver, Assoc., I.R.E., is acknowledged the last word in super design. Its range is from 500 to 5,000 miles with loud speaker volume, when operated on a small loop. These records are not unusual, but are typical of the results reported daily by enthusiastic Silver Super fans. The Silver Laboratory and Portable supers ca.n be put together and operated by anyone by simply following clearly explained . directions and drawings. No matter what results you have achieved with any other receiver, the Silver Super will consistently surpass them, in Summer as well as in Winter! Parts include the famous Silver TwoTen and Two-eleven charted transformers. Super Results with the Four Tube Knockout THE famous Silver Four-Tube Knockout will positively give the same results on a seventy-foot antenna as any super will give on a loop! In every instance fans who have built the "Knockout" voluntarily support these claims. The Knockout is the ultimate in four-tube radio design. It consistently brings in coastto-coast stations on loud speaker, and its simplified wiring makes it easy for the nontechnical fan to build. It is equally easy to operate, and stations can be logged permanently. Parts shown at the right include the famous Silver condenser and R. F. coupler and Antenna coil. Send To-day for McMurdo Parts for the "Knockout" „ . , s Price Lech 2 Silver .0005 Low Loss Condensers No. 301 $4.50 3 4" Moulded Dials— Tapered Knobs 1 . 00 1 Howard 6§ Ohm Rheostat 1.10 6 Insulated Top Binding Posts .05 1 Carter 102A Jack 80 1 Carter 101 Jack 70 1 Silver Low Loss Coupler No. 105 5.00 1 Silver Low Loss Antenna Coil No. 205 2.50 4 Hoosick Falls Panel Mounting Sockets .60 2 Thordarson 3 J: 1 Audio Transformers 4.00 1 On-off Switch 60 1 .00025 Mica Condenser with Leak Clips 45 1 .002 Mica Condenser 40 1 .0075 Mica Condenser 75 1 2 Meg Grid Leak 50 1 7 x 24 x 3/ 1 6 Bakelite Panel, Drilled, Grained and Engraved 7 . 00 Bus-Bar, Spaghetti, Screws, Nuts, Solder, Lugs, Etc 1 .00 Complete Parts for Silver 4-tube * 'Knockout"— Total $44 . 40 "The Four -tube Knockout Receiver," a Booklet by McMurdo Silver, explains the Construction and Operation of this Set in Detail Price 25 Silver's Free Book, "The Why of Silver Circuits" ^ Tested and approved by Radio Broadcast ^