Radio Technique

Radio Technique George M Myers RECENTLY son Christopher came problem wire broken Multicon plug Kraft switch harness Ob viously hed lose available day flying week visit favorite Kraft fixer Danny Neger Patchogue Hobby Cen ter Patchogue NY little tugging pins found possible slide plastic body plug along wires shown photo damage much worse expected three wires broken set about making repairs Since Multicon pins staked onto wire proper fix ould get some new pins strip wire stake new pins place neither new pins nor staking tool substituted drill some solder 1 Pull wires through plastic body shell direction pins 2 Cut wires flush point enter pin 3 Drill out rest wire staked metal using number 72 drill pin vise depth 3/16 crossdrilled hole located purpose making sure wire way pin 4 Cut wires coming plastic body shell same length Push back sulation about /s tin wires 60/40 Rosin-core solder heat will cause insulation move back another 1/16th Use minimum solder sure diameter tinned wire will fit pin solder doesnt wick up inside insulation will cause stiff spot precipitates another failure 5 Slip pin inside 3/32 diameter aluminum tube have dented 5/16 end keep pin disappearing inside Slide tinned wires pin sweat-solder to pin heating aluminum tube done keep outside pin collecting solder would cause difficulty try push back plastic body shell 6 Do same other wires 7 Press pins back plastic body shell restore tension pins adjusting slot double-edged razor blade necessary 8 Install plug system check performance exposed pin can gripped carefully pair pliers purpose removing body shell concealed pin driven Out pushing straight pin wire side straight pin will have pushed through insulation about 1/16th body shell damaged insula tion will have cut away making repair Repairs Deans connectors used Ace R/C Inc Citizenship Radio Division Curtis Dyna Products Corp Pro Line others little difficult due need replace shrink tubing serves strain relief wires can make things simple procuring Radio Shack item 278-1627 before need repair simple matter pulling pin male female out plastic body shell wire side making repair re-inserting pin shrinking down tubing heat solder ing iron important thing remember slide heat-shrinkable tubing over wires before soldering World Engines several others use special plugs own type Most World Engines particular have solder cups pins makes pin removal service unnecessary big problem shrink tub ing dont have take another look preceding paragraph expect column will published midwinter great time servicing radio equipment Vibration will fracture strands wires one deep inside shrink tubing insulation usually within /s solder joint pin dont take opportunity inspect next season will fracture few Eventually will start getting interference broken ends make break contact comes crash right middle sum mer can avoid grief simply feel ing wires lumps soft spots bending pulling lightly single wire system leaves case enters plug repairing damage find have lose trouble ad dress 70 Froehlich Farm Rd Hicksville NY 11801 February 1976 9 Before after connector repair Erratic operation led search broken lead after pulling pins out shell two damaged leads also revealedcareful checks much order Ralph Whites Fliteglas Mustang P-51D Tangerine ready go flight line 1975 Nats Engine running wing flaps down position Van Putte photo