Quartz Crystals For Every Service

AH crystals made from Grade A imported quartz - tound and etched to exact frequencies. Unconditionally guaranteed Supplied in Pin spacing fa Pin diameter ,093 MADE TO ORDER CRYSTALS * . . Specify holder wanted 1001 KC to 1600 KC .005 tolerance_____ 4.50 ea- 1601 KC to 2500 KC .005 tolerance________ 2.75 ea. 2501 KC to 9000 KC .005 tolerance _ --- 2.50 ea. 9001 KC to 11,000 KC .005 tolerance 3.00 ea- Amateur, Novice, Technician Bond Crystals .01 Tolerance , . . 1.50 e*. 80 meters (3701-3749 ICC)...

Electronics Exhibit

Occupying many thousands of square feet. Included is a working model of the ''Oscar satellite that made communications history. Also National Aeronautical and Space Administration display of our first man-carrying satellite, Friendship Seven. causes of television interference (TVI) often are two-man jobs the amateur sometimes needs help from the owner of the TV set, who obviously can't be of much help unless he knows something about the problem. In the early days of radio, both amateur and...

Top Kilowatt Linear

Fan cooiing 3 5-50 hy. swinging choke 4. 8 oiMilled fitter capacitor 5, Two SfiGA's 6 gt Monitor scope o level control 7, 1500 v. Power transformer 8. Internal RF 9. Loading control 10- Band switch, 80 through 10 meters and High Voltage interlocked switches 12. High Voltage 13. Power pilot light 14. Relative Power sensitivity control switch with Grid, Plate, Relative Power, and High Voltage 16. Tuning control with band markings 17. Meter ufd. 2 KVt utput with shielding 11...

Surplus Radio Conversion Manual Volume

This book fltvas circuit diagrams, photos of most equipment, and rather good and complete conversion Instructions for the following BC-221, BC-342, BC-312, BC-348, BC-412, BC 645, BC-946B, 5CR-274N 453A series receiver conversion to 10 mater receivers, SCR-274N 457A series transmitter conversion to VFO , SCR 522 BC 624 and BC 625 conversion to 2 meters , TBY to 10 and 6 meter , PE-103A, BC-1068A M61A receiver to 2 meters, Surplu tub index, cross index of A N tube vs....

Fm

Specify crystal type and freauericy when ordering. Specify crystal type and freauericy when ordering. m - 1993 kc 2Q0 - 9999 kc I00G0- Am k 15000 20000 fcC ttpt j'hj jtjl Not fvaiiatJlt Nni jtv jrabi-e BO G-SmWS he iOOOO - IWOif J.C 1 - E IS999 999 amp C 10 - 1199 mc 15 - 999 nc 30 - 59.93 mc Allow three eg four - _iy processing Allow three eg four - _iy processing When you design or build . . . combine International crystals and crystal switches. Switches available from 3-position to...

Maverick Ii With Power Monitor

I Saifte as above but with 6 meter power indicator I calibrated in watts output. Supplied with 6 foot cable which plugs into reccptical on filter I Indicator Size 4 by 4 by 4 Slant Face. Reads 0-50. 0-400 watts. I A narrow band-pass fifter with 6 mc pass band and 146 mc center frequency. Less than 1 DB insertion toss, Ai least 35 DB attenuation of I harmonics out of pass band. Handles up to 185 watts PL 80 THRU 10 METERS SECOND HARMONIC FILTER

Mc Band

Paul M Wilson A W4HHK 226 Pelerson Lake Road Collierville, Tennessee PHE 420 mc band is located near the low frequency end of the UHF portion of the radio spectrum, and is equal in size to all of the radio spectrum lying between the lowest radio frequency used and the high end of the ten meter band. Think about that for a moment . . . all of the amateurs operating on all the amateur bands from 160 through 10 meters could operate on the 420 mc band, and with much less QRM. Of course the range of...

Info

Grid Leak Bias

The second change provides proper grid bias. The 6DQ5 requires approximately 70 volts on its grid, where the 6146 likes 45 volts. Since the 6DQ5 draws little grid current more on this later , grid-leak bias is impractical. Battery bias is recommended. Lift the ground end of the existing grid resistor from ground and connect it as shown in Fig. 2. At any convenient location, install two 30-volt hearing-aid batteries connected in series to provide 60 volts. Ground the positive terminal, and...

Additional Information On Request

Band, I1 he third harmonic rf present when the the two meter transmitter is operated could damage the diode mixer or rf amplifier tube in the 432 mc converter. One solution to this problem would be the use of a control system so that the 432 antenna relay operates when either the 144 or 432 mc transmitter is operated, Diode mixers require relatively little injection for good mixing. For a converter with a 50 mc first if the oscillator injection string might be as follows a third overtone...

Wyd

They are quite necessary, so don't eliminate them or you'll have an unstable VFO for your efforts. After all the holes have been drilled, bend up the two ends to form i tie chassis. Make sure you bend them the right way or you'll have a nice conversation piece. The Nuvistor sockets are placed in their respective holes, and the tabs bent over and peened with a drift punch. Wiring the nuvistor stages themselves is very easy as all parts go point to point. The bandswitch is another matter. he task...

Model Fi

Nuvistor Projects

Five separate filters housed in one package and I selected by a front panel switch. Each filter is tuned for maximum attenuation of the second harmonic for that particular band. Sccond Har- I monic Attenuation 35 DB. Handles up to 1 kw. Size 5 by 6 by 4. The above filters are available in single band I packaging for each band. Specifications are the I same as F810. Size 5 by 2 by 3 AMATEUR NET 7.65 Write for complete brochures. I See your local dealer or order direct from . I Depot Square amp...

Power Booster

6dq5 Amplifier

WOULD you like to increase the rf power output of your transmitter by 35 percent for less than 6 If you're now using a rig in the 3Q-to-90 watt class, with either an 807 or a 6146 as the final amplifier tube, and operating in the 3-30 mc range, you can do this or at least approach this performance increase simply by rewiring the final-amplifier socket to accept Before you rush out to buy the bottle, though a word of caution this trick works only for the low-frequency gang- The 6DQ5 will not...

1

And- f you want general coverage with that Some thing Extra H DB choice but the RW 8 versatile HQ-145X Top features include dual conversion from 10 to 30 MCS Range , crystal filter slot selectivity, continuous tuning from 540 KCS to 30 MCS, improved noise limiter, and high precision crystal controlled channel for use at any point within the entire frequency only 269 range just to name a few. Amateur Net i . . y . y . - - - gt - 1 'AAV. . . . . . . vv'.v. v v THE rig they are using on eception...

Ameco Nuvistor

Over 20 db gain plus a lower noise figure, 2 tuned chts, SCW4 Ntmstor completely neutralized. Noise figure is 2.5 dt gt 50 mc 3 0 db 144 mc aod 4.0 do 220 mc. Power reQuirements 100-150 v. S ma, and 6.3 v, at .13 amps. Specify frequency desired. Also available for 27 mc lt 19 OG Citizens band. Mod. PV, wind amp tested JIO-JJ a compact, fully transistorized code generator that combines all of the desirable features of electronic sending with arstmct ve dot dash control to...

Summer Callbooks

The SUMMER issues of the CALLBOOK are now on sale at your favorite radio parts store. Be sure to ask for your copies of the latest edition. Or order direct by mail from the publisher United States Section, per copy 5,00 plus for Foreign Section, per copy 3.00 plus 25 for All countries outside U.S.A. mailing, 4844 Fullerton Avenue, Chicago 39, Illinois, Dept. ST-6 r have always been too proud or too Scotch to A purchase a store bought transmitter or even a store bought exciter. Likewise I have...

Coaxial Ughtning Arrester

MODEL LAC-1 with one mate and one female Type 83 connectors install directly to equipment, PI ICE J3.95 NET n MODEL LAC-2 with double femaie Type 83 connectors for in-the-cable initaflotion. PRICE 4.45 NET MODEL LAC 2N with double female T pe N connectors for commercial in-thccoble installation. PRICE 5.95 NET BLITZ-BUGS provide lightning protection for amateur, cirizen-bond, two way ond all other coaxial cable systems. See Your Distributor or Write for Catofog Change crystal frequency with...