Show edited by 0 douglas editor of 0 radio merchandising izing dj p 10 turns A LA A lp 1 l showing how a modified inductively coupled honeycomb receiver may q ba constructed by the beginner tile the oliree honeycomb coll regenerative receiver 1 h considered artong adiong radio fans to be one of the lest best types of sets seti for tile the beginner who contemplates going from the crystal detector to a tube sot set A slight blight modification of this circuit Is shown in the dlug ram rain it will be seen that two variable controls are eliminated by substituting a fixed primary coll coil coupled to the secondary and thereby doing away with tile the primary yarl variable ablo condenser la in this manner tile lie honeycomb set Is made to tune extremely sharp ond and easy to adjust the primary coll cell Is made by wrapping 10 turns of no 22 dac copper magnet wiro wire in a circle and tying it to tile the secondary honeycomb colt coll of 30 or CO 00 turns this outside colt coll should be wound in the same direction ns as the secondary to which it la Is fastened the plate coll cell which la Is another lioney honeycomb comb of about CO 50 or 75 turns Is connected in series with the plate plata of the die detector tube and the telephone receivers around the era and tile n B battery the usual phone condenser Is connected this conden iser Is v important as it will assist in regeneration regener ailon the secondary coll coil to which tho the primary Is fastened must bo be shunted ly by a good variable condenser the letter better the condenser the sharper the tet will tune and the louder the stations will come in the movable or rotor platea ot of tile the variable condenser of 0 the 21 or 23 plate typo type connect to the battery side of the circuit this will help to body capacity effects the stationary plates connect with the grid condenser if the condenser Is of 0 the metal end type the rotor plates will connect to tha ilia battery side aide of tile the circuit and caba capacity city effects will he be entirely eliminated the grid condenser la Is of the mica type ranging from to the condenser should be shunted with n grid leak of approximately 2 ni eg it if tile the set qu eals too much try another value of f grid leak in tuning this circuit circele the tube la Is lighted end burped up to tha ills usual brightness the plate coll coil Is placed close to tile the secondary colt coll while chile tile the yar variable lable condenser across the secondary Is slowly moved back and forth this will pick up the the stations within the range of tle tile receiving set more blocs careful adjustment Is necessary to clear up the music or voice and this la Is lip by moving the plate coll coil to or from the secondary jelt jf it tsi Is found that the set act tunes a little broad on local stations the ole coll coil should be Rd with less I 1 turns I 1 if six turns are placed on the primary it will tune a groat great deal sharper than with ten turns but there will be a slight in algar strength this makes tin in ideal receiving set and Is a capable of picking up distant stations station for the higher wave lengths around meters the secondary feconda fy coll boil may be increased to an L 75 new york I 1 |