Show U by 0 1 a to vilt r of limit at handi row bof r 4 all 4 aj ai r by placing binding welding pot posts as shown on one or both R F stayed can bi be film ron ith tile avile rf r local I 1 a ox a rulf rule ct c tile in with newl itis in amile ili inic and one or more stages i f antill 11 i fr frai ui my ny nm nin could be dixi aped A mi tin and cowl go 0 I 1 mull results still integ tit irly it in dot MX 1 il I bralit lr grutle e it to ti up tip p tiny nr or in a radio f y elf cult to control flip ml rule stores bat but in a neutro lne circuit this till can tie done without of try rile accompanying diagram show shows the flip method need used two extra bieling pert are re empl employed end ond are connected to tile middle tap on tile lie of jie hp neutro formers as 01 shon these bind ing pola posts may be placed on a sep separate arute parts needed for flexible coupler specifications for construction of attachment for experimental work by B PETER MOMBELLO most varlo couplers on the market today are not very flexible and their decree degree of selectivity cannot be varied to obtain the tile best results from every hookup the varlo coupler described below ie Is the best that can be made today purchase hoote the following parts one half pound of no 22 D Q C wire one hard bard rubber tube 8 inches long and nd 4 inches in diameter one S 3 inch rotor ball till this should be in the form of a sphere and not a tube one hollow brass shaft A inch ID in diameter 1 inches long one quare square brass nut bolth ft ath 14 inch threaded bole hole one eollo brass rod 2 24 inches loni long 4 liri 0 0 0 0 0 0 1111 lilt to alth ath thread at one end to fit at bras brass nut lint two dinall brass sprints springs inch ion long to fit ct shafts four mall small brass breas wood screws two braes bran strips with small boles holes it at each end and larce large bole hole in middle to at shaft shafts I 1 the above must be fol coed lowed or r it will be b impossible to con attract the varlo coupler on the 8 inch tube sl ind 80 tarns turns of to 0 o 22 D C Q nire ire taking off a tap every 8 tarns tums for 04 64 turns and then a tap off every second turn for ie 10 turns starting U inch away from one end of the tube as shown in pic FIC 1 A quarter of an inch anny from thin this winding drill a hole bole on each side of the tube to at it the shafts specified spec ined A 4 J WOO rl it Z quarter of an n loch away from these two tuo bobes and directly above them drill two other boles holes and so on to the top of the tube as shown in irk FIs fig 1 the ile stator Is completed cample ted OB on the ball the hollow shift shaff Is 1 pushed through so that when the Tario coupler Is assembled this brass tube will come flash flush with the outside of the hard rubber tube this Is clearly elearly shown in fie 2 and ie is very important the brass strip ij Is then to the tb wor ball and bd the shaft ui I 1 nril rill her strip it tined on it tip e reir if of tile danet on conrd rd or anu tip tit pla e 1 ill 11 ri artly v fly on hie tile fro fn nt tit of the lint ea 1 I 11 II ci lip Rit linna to tit elther ol 01 leits I 1 esix IID the defector de fifon fetor tor nion nione or oils on stage of fr finny ny nii nihill ill n iny be 1 d tic TI e ground it Is ileayn left in tile lie i dional binding petits it it ight I 1 e v pre enil ferni ie to tins a point match on the flip rap of lilt in innel for lilts till irie puri i instead Ini tenil of flit lie wilding lilt tm pm ia in this way any ane of breque nry may I 1 be cui cut nut out by a turn of tie switch an I 1 it would mould be ile to change chance the anie liall from front one bin line ling post to anothy r solder soldered etl to it the flex dox ihle ible rotor leads uru art run through this tube the bruxy 1 nut into which the flip solid brass Is to ie le strewed li Is then pushed into the flip wood mood I 1 tall all which mint must he ile pro loudly cut to hold it ahe I 1 he nin ant 1 is tinned and the brass bruss strip soldered to it and held down dod by screwing it to the rotor this title inel iasi strip Is on the outside refer to fie fig 3 now on the ball wind every tarn tum aal s M 0 4 pus possible to get et it on with no a 22 D C U wire ire but be sure that the two tides sides are bu lanced with an filial equal num ber her of turn turns for proper of the tile set aft afterward emard this completes the rotor the solid rod ie Is unscrewed ed from the rotor the rotor hall ball Is placed into the rotator tube and anti the hollow shaft curry ine ing the leads Is pushed through the tile lowest liole hole then the solid rod Is in seated in the opposite hole from lie the outside of the tube and into the nut in its former po petition the brass springs are placed on both sides to keep itie rotor in the renter center refer to fig Z 2 the completed Is now hooked up in the sit act the tho set Is tried for a few davs and the reul results ts noted carefully then the rotor Is removed and placed into the tile text two tuo holec 11 farther further anny from the win ling re will curtly increase nc rence the inie rotor Is again changed anti then again brain until all the holes have been tried and the best ones for each particular kind of work have been found this experimentation necessitate ps long leads from the rotor and the bind ing posts on the pans parts to which the leads are connected this varlo coupler Is so 0 o flexible that for distance nork mork the very top hole holet give the best result results and all other have their advantages lown down to 0 o flit th very bottom hole which Is supreme for the local locals the change changes take les than thou the be new york globe cabinet protect protects coils from dut dust and moisture dont ext the and con det denser liters of your radio sel jo dut ane an moisture if it you are dost af or say ing yourself a lot of rouble and an norance I 1 arv ery often they arc are reAp reft pun bit ble for the roni emilen lener ter 11 stort 1 I ort circuited keep art p all coll collit and nn den denar cohered A gnp way waky to 16 be hp itura un of doing thie this Is I 1 in to the file in a a cabinet thoe tho e ft nho ho havi hay their net vet in a q a cabinet nil profit b by keep keeping liar it there blany nidin blasts last during the cour coura of heir their ex 11 with this thing in an I 1 hat that neglect this point with ith the he nult that the set may be out of if its cabinet tor for a week A eek or more while mille this roay may not seem so 90 long loor it lif really tong enough to allow a sufficient clent amount of tit moisture and dust to collect on the flit various parts pans to as tn to do a good deal of honn harm if it you are ping going to allow your colls coils to become moisture booked they might just as an viell ell be wound etith iab non tion insulated teft sire 1 1 Is an ex cellene conductor of the very weak elec electrical triest eur current rents that are fire floqui through the set do not tap coil coils to in this day of improved tuners it 11 would be laell ell for toe the fan tan to know hat that a lapped coll coil la in far for from efficient tapping 0 coll coil introduce introduces what I 1 IF known as deed dead end loss into I 1 the cir cult cull thil lou lots Is detrimental to th tn operation of i a receiver celver rt and can b be eliminated initiated easily A coll call should ba b used without tips taps and a good low loss condenser employed to obtain a Is av length va rution A it 16 1 al I 1 I ft |