Set:. 2900 WESTON INSTRUMENTS The newly expanded CROWN SERIES distinguished by handsome, functional design Weston's Crown Line represents the ultimate in meter design, performance and readability, The series now includes a 4.5·inch group 01 D.C. instruments . .. both A.C. ond D.C. types in the 2.l-inch group. Their striking cases will enhance th e most modern ponels or electronic equipment. Clear plastic covers and exceptionally long scales aHord unmatched readability, with excellent natural illumination from top, front ond sides. Confusing shadows are eliminated. In poorly lighted areas, one bulb mounted above th e instrument furnishes adequate illumination. Th e neutral tone of the multi -prism front is designed to complement test equipment or panels of any color. CORMAG@ mechanisms eliminate the need for external shielding; they can be closely grouped on magnetic or nonmagnetic panels without special adjustments or danger of intereffects. Scoles ore exceptionally long for the (ose diameters; 5.3 inches for the 4.S-inch models, up to 2.5 inches for the 2.5·jnch model s. Bollistic characteristics ore greatly improved. SPECIFICATIO NS MECHANISM-Model, 1721 / 172 2/ 1741 Mod el 172A-Movo ble iron vone. (Ofe magnet mo¥ing <oil type. ACCURACY _D.C. inslrumon h ore with ± 2 Y. 0 1 fu ll sc a le va lue, Model 1722 reclifier typ o 0 -( indrumenl is with in ± 3% of full I(ole whon u led on s ine wov e 60 cycle lource 0 1 norma l ro om lemperotu re 01 25 "C. Mod el 1724 a·c inllfumen l II within ± 2 % 01 full $(ole value. CASE -Crown shope with molded Bakelite bale a nd clea. plol lic co ve r. MOUNTING- Models 1721 / 1722/ 1724-lnte rcha ng ea ble wi th ony 2. 5" Mil Spec imtrumenl, in cluding the ilul h round Bake lite <aliI Weslon 506 Seliel. Madel 1741_fou. #6·32 mo unt ing studl in flan ge. Co nfo.ms 10 ASA 09.1 · 1955 for 4'/,' pane l in slrumen t. TERMINALS-8·32 BC .adi with nuls and wOl hen . POINTERS_Lan<e type, block finil h. SCALES-Modell 172 1/ 1722- f ul l 2.5" panel instrum ents) 100 · arc. Model 1724_ 2.2 5" long. 90 " arc. Mode l 1741-5.3 " long. 100 · arc. lo ng_liang II. Ihon mal t 3V3" ZERO CORRECTOR-Screwdrive r type. 360 · 'ololion . SHielDING-Modell 1721 / 1722/ 1471_CORMAG@ mechoni l m. Model 1724 is unlhielded . TYP ICAL D-C MODel 1721 · 1741 VOLTMETERS_I , OOO Ohms Per Volt S<ole Di v. P,ice Range 1721 1721 1741 $ 17 . 50 S12.75 '0 12 .75 17. 50 75 12. 75 17. 50 75 12 . 75 17. 50 300 60 13 . 25 18.00 lB . 50 "0 '0 AMMETERS Range Sca le Di". Price (Self· Contoined) 1721 1721 1741 $ 12. 25 $ 17 .00 3 60 12. 25 17. 00 12 . 25 17.00 10 12. 25 17. 00 '0 Elliernal Scale Scale Oiv. Price Shunt Type 1721 1721 1721 1741 50 MV 100 ampi 50 $ 12. 50 $17.25 50 MY 150 amp. 75 12.50 17.25 50 MY 200 ompi 40 12 . 50 17.25 MILLIAMMETERS Appralt. Re i . Scale Oiv. Price Range 172 1 1721 172 1 1741 80 $12 . 25 S17.00 • 8 12. 25 17.00 .0 1.1 12. 25 17.00 '0 20 12.25 17.00 I.' '0 2 12.25 17.00 '0 12. 25 ' 00 17.00 '0 0.5 .0 12.25 17 .00 '00 300 0 .33 12.25 17.00 500 0.2 12.25 17 .00 1·0· 1 12.25 17 .00 , "' ."" " • " " , ,.,. , ,. • " .,.,. The' MASTER-2 4th Edilioll Page 902 RANGES MODEL 1724 A-C VOLTMHER 25-125 CYCLES MICROAMMETERS Appralt. Re s. Scole Oiv. Prke Ra nge 1721 1721 172 1 1741 20 5500 $22.25 $31.00 18. 25 25.25 " 00 .00 1230 15 . 25 2 1.00 '0 200 600 12. 75 17 .50 '0 230 12 .75 17 .50 'CO 1230 50·0·50 15 . 25 21.00 " " , Rang e " "" , "' Range Scal e Oiv. ." " " " P,ice $ 18 .75 18 .75 18. 75 18.75 18.75 18. 75 75 '0 75 .0 300 " 0 ,• .,. .,. '0 "'0 ,.0 ApPlolt. Rei . Scale Oiv. 50 ,. . ApPlolt. Res. Scale Oiv. 2,000 7" '0 Range 2• , .0 Pdce $ 18. 75 18. 75 Price $21 . 25 18.75 . 30 30 '0 Approlt. Ohms/ Volt 10 10 27 " " 70 130 260 260 Price $16.00 16.00 16.00 16.00 16.00 16.00 16.50 18.00 20 .50 A-C AMMETER 25-500 CYCLES 3 MICROAMMETERS Rang e 200 '00 30 '0 300 MllLI AMMETERS Ra nge "50 30 '0 15 30 80 RECTIF IER TYPE A· C MODel 1722 VOL TMETERS_ I ,OOO Ohms P.. Volt Scale Oiv. Scale Div . ,. ,. '0 30 '0 ApP lolt . Re, il. Ohms 0.125 0 . 035 0 .0 165 0.002 0 .001 Price $16.00 16.00 16.00 16.00 16.00 A-C MILLIAMMETER 25-500 CYCLES Range 15 ,. . 00 '00 Scale Div. .0 '0 ,.,. Appro .... Rel;l. Ohms .00 82 21 0 . 65 Price $ 16.00 16.00 16.00 16. 00 PRICES SUBJECT TO CHANGE WITHOUT NOTICE Use Index ( ps . 2) fo r Quick. Easy Location of ALL Products N" Copyright by U. C. P., I",. Sec:. 2900 WESTON INSTRUMENTS 201/301 PANEL INSTRUMENT SERIES Th e Wes ton 301 l in e -famous an d tru l le d throu g ho u t industry for ma ny ye ars-h oI unde rg o ne imporlant change I. The J l!J _ inch in strume nts look differe nt , are more vers oille, work be tter and longer. And now [I si ster line of 2 1h-inch In l lrumenls hCl I bee n introduc e d-th e 201 Gr o up-ma tc hin g th e 301 in s tru me nt s in a ppeara nce a nd incorpOfo lin g the lome new fe atures. Th o re nown e d Wes ton CORMA G@ me chan ism is now slond a rd eq ui pme nt . .. pe rmils mo un ti ng on mag ne tic o r no n ma gne ti c pane ls, ci oll! 10 o th e r in s trume nts, w il ho ut speci al adjuslme nls . II make s th e "301 " a nd " 20 1" imm un e 10 th e c ff e d s 0 1 stray mo gn e tic fi e ld s. Ba lli s tic ch a ract e ris tiu oro impro ved; even critica l damping con be obta in ed . New , mod· ernist ico ll y styl e d Bo ke lite coscs- round or rec tangular-ore sio ndord . These caSel a re in terchangeable for A. C. and D.C. mode ls. MODELS 201 /3 01-D.C. VOLTMETERS MODEL 204 / 304 SER IES_A. C. VOLTMETERS Approx . 1000 Ohms/ Va ll Price Ohms/ Vall Scal e Oi.... Sca le Oi.... Prico 30' 204 / 304 20' Ra nge 204 /3 04 Rango 20 1 201 ' 01 '0 1 $18 .50 $17.50 1. 5 1 '0 20 50 $ 14. 25 $15.25 18.50 17 . 50 1.5 '0 75 14. 25 1S. 25 '0 18 .50 17 .50 10 5 50 .0 14 .25 15 .25 '0 18. 50 17.50 10 10 50 5 25 50 14.25 15 . 25 18. 50 17.50 15 8 ' 0 14 .25 ' 0 15. 25 '0 lB .50 17 .50 27 30 10 20 '0 50 14 . 25 15. 25 18 .50 17.50 50 50 15 75 14.25 '0 15 . 25 18 .50 17.50 70 80 '0 60 '0 14 .25 15 .25 '0 19.00 18 .00 115 26 130 50 25 50 14 .25 15.25 19 .00 18 .00 130 150 80 '0 14.25 15 . 25 ' 0 '0 20.00 19.00 220 25 250 100 20 50 14. 25 15.25 20.50 19.50 260 150 '00 '0 75 14 .25 15.25 '0 22. 00 22. 00 260 50 500 200 14 .75 '0 ' 0 15 .75 ' 00 .0 14.75 A. C. AMMHERS - 25·5oo CYCL ES '0 15 .75 500 25 50 Appro x. Resis. 15 . 25 16 . 25 Price 50 Sca le Di.... Oh ms 20. 25 Ran ge 204 / 304 ,204 / 304 20' '0' MODelS 201/ l 01 _ D.C. MI LLI AMMETERS $18. 00 $17 .00 0. 125 1 50 App. 18 .00 App. Res is. 17.00 0.035 2 '0 Scal e Oi v. 18 .00 Res is. 17.00 Ohms 0 .0 165 Price '0 RCln ge 201 17 . 00 l B.oo 20 1 0 .002 '0 1 20 1 50 5 ' 01 '0 1 1 20 50 18 .00 100 17 .00 0 .00 1 88 $ll.75 $14 .75 10 50 1.5 75 18.00 17.00 '0 88 0.001 '0 13.75 14 .75 10 '0 2 l B.oo 17.00 ' 0 '0 13.75 0. 00085 '0 14 .75 '0 '0 18 .00 60 17.00 ' 0 0 . 00072 '0 I l .75 14.75 50 50 5 25 50 6 8 Il .75 14.75 MILLI AMMETERS A. C. 10 20 50 2. 5 1.5 I l.75 14 .75 Approx. Res is. 15 75 1.5 2 .5 '0 I l .75 14 .75 Price Scal e Oiv. Ohms 10 40 2.5 2. 5 '0 13. 75 14.75 204/304 Rang e 20 4/ l 04 20' '04 60 2.5 '0 2.5 '0 13.75 14.75 $17.00 $18 .00 .00 15 '0 50 25 50 2 2 13.75 14 .75 17.00 lB .oo 82 50 50 100 20 50 1 1 Il .75 14.75 18 .00 21 17 . 00 100 50 150 75 0 . 66 0 .66 ' 0 I l .75 14 .75 18 .00 0 . 65 17.00 50 500 200 '0 0.5 0.5 '0 I l .75 14 .75 20B THE RM O SERIE5- TH ERMO· AMM ETER 60 ' 00 0 .l 3 0 .3l '0 I l .75 14 .75 Price Ra nge Sco le Oi .... .... Price Sca le Oi Ran ge 500 25 50 0.2 0 .2 13.75 14 .75 $29.00 $29.00 40 1 20 8 800 40 40 0 . 12 0.1 2 I l .75 14.75 29.00 20 1.5 29.00 10 1000 '0 20 50 0.05 0 .05 Il .75 14. 75 29.00 40 29 .00 15 2 ' 0 1-0·1 40 40 ' 0 Il .75 14 .75 29 .00 10 40 29.00 50·0 -50 50 '0 50 2 2 13. 75 14 .75 5 25 29 .00 100· 0· 100 40 40 1 1 Il .75 14 .75 THERMO . MILlI AMM ETER MOD ELS 201 / l01_ 0 . C. AMMETERS App. Res is. Scale Sco lo Oi... Price Ohm s Price Range Oi .... Rong o 20 1 '0 1 101 $3l .00 '0 1 5. 2 100 20 1 20 50 $ 13.75 $1 4.75 5 .2 ll .OO '1 15 20 1.5 75 '0 13.75 14 .75 5. 2 ll .oo 120 '0 2 40 40 I l .75 14. 75 1. 8 33 .00 ' 00 '0 60 '0 I l. 75 14. 75 ll.OO 25 1.J 500 5 25 50 I l. 75 14. 75 Squared Go lvanom e te r wit h uniform 100 di... ision scale . 'Current 10 20 50 13.75 14.75 MODE L '08 SER IES- THERM O·AMMETER 15 75 ' 0 14.75 15 .75 Sco le Oi .... Price Sca le Oiv. Price Ra nge Ran ge '0 .0 ' 0 14 .75 15 .75 $lO.oo 50 1 50 $30.00 5 50 25 50 14.75 15 .75 lO.OO .0 lO.OO 8 1.5 '0 5· 0-5 50 14 .75 l O.oo 40 10 50 2 30.00 10·0 - 10 40 14.75 30 .00 60 2.5 50 30 .00 15 15·0·15 .0 15 .75 30.00 20 .0 30 .00 20· 0.20 ' 0 40 15 .75 40 30.00 4 30· 0·30 60 15. 75 50-0-50 THERMO· Mlll IAMM ET ER 50 15.75 App. Res is. Price Scale Oiv. Ran ge MO DELS 201/ 30 1_D .C. MICROAMMETERS $66 .00 85 50 t 10 Scale Oiv. 66 .00 40 22 t 20 201/ 301/ Approx. Res. Price 66.00 50 5 t 50 Range 206 '06 201 206 201 206 34.00 8 100 50 '06 10 20 50 4500 4500 $J UO $32.00 34.00 5.2 'li S 50 20 '0 1520 5500 1520 26 .00 $24 .15 21.00 34 .00 5. 2 120 .0 JO JO 60 1520 5500 152Q 25.00 23 .00 26.1111 l4. oo 5. 2 75 150 50 25 50 4150 1140 4800 1140 19.75 24.110 211. 75 24.00 l4.00 40 200 2.7 100 20 50 870 660 1230 600 16.15 22.00 11.15 22.00 2.4 34 .00 60 300 200 40 40 600 14.25 600 15.25 22.00 34.00 500 50 1.J 500 25 50 160 230 14.25 15.25 f or rOl1ges o f 100 MA o r highe r, expa nded sca le (On b. fUrni Jhed at 00 50-0-50 20 50 870 16.25 17.15 "'0 addi tio nal S8.00. 100·0· 100 40 600 600 14.25 15.25 t Va cuum The rmocouple lype 500·0-500 20 50 100 88 13 .75 14.15 'Current Squared Gal vanometer wit h ul1 iform 100 division 1(0 10 , , , • " " "V , , "" , " , , '01 " "" "" " PRI CES SUBJECT TO CHANGE W ITHOUT NOTICE Copyright by U . C. P., i ll,. Usc l odex (P&:. 2 ) {or Quick, Easy Loadon or A ll Products N~ Th~ MASTER - 24 th Edition Page 903 Sec. 2900 WESTON INSTRUMENTS PANEL INSTRUMENT SERIES, CONT. 20'2 / 302 RECTIF ieR TYPE A.C. SERIES A.C. VO LTMETER 1000 Ohm s/ Vol' 5co1e Oi,... , 2000 Oh ms / Vb ll Scole Oi.... Price 202 Rang e '02 5 10 '0 50 50 IS 75 '0 50 100 '0 50 50 20.25 ISO 75 20.25 21.25 '00 '0 20.75 21 . 75 $20. 25 20.25 20.25 20.25 20.25 20.'25 Range '02 $21 .25 21.25 21.25 21 .25 21.25 21 . 25 21 . 25 I I.S , 5 10 IS 20 2 '02 75 '0 50 50 '0 50 50 ISO '02 $20.75 20.75 20.75 20.75 20.75 20.75 20.75 50 75 '0 50 100 Pr ice 20.75 20. 75 Scal e DiY, 0.5 50 50 40 50 I 2 5 $2 1 .75 21 .75 21 .75 21 .75 21 . 75 21 .75 21.75 21 .75 21 .75 21 .75 20.75 75 Ronllo Scole Oi .... Ran ge 100 50 40 '0 50 200 '00 500 A.C. MllllAMMETERS Appro ... R'n ;t . Ohms "2 1030 $20.25 470 20. 25 270 20.25 ISO 20.25 A .C. MICRO AM METERS A ppro ... R(ull. Ohms 202 3400 $24.00 2400 22 .75 2000 22 . 75 10JO 20. 25 Pric(I '02 $21 . 25 21 .25 21 .25 21 .25 Price '02 $25 .00 23 .75 23 .75 21 .25 NEW 1751 SERIES An imporlont new addition to th e Wn ton ponel ins tru me nt line. Not eworth y feo lurn in dude on 011Boke,ile co n with 910$1 wi ndow . .. the Westo n CORMAG@ n lf.shi e ld ed mec hon lsm ••. 4 " lon9 scole. Me thod of moun lln9 conforms to ASA C39.1-1955 fo. 4 V2" pone l inlhume nll. TYP ICAL RANGES D· C MODEl 175 1 Ro ngo fSe ,f'co ntoined ! , I 5 10 External Shunl Type 50 MV 50 MV 50 MV A· C MILLIAMMETERS I Sco le Oi.... 50 Appro. , Res. 470 5 50 150 Ronge Price $22.75 22.75 D·C AMMETERS Scole Di v, 50 '0 50 50 Scolo 100 150 200 Scale Div, 50 75 '0 Rang e 1 5 10 20 50 Prico $16. 25 16.25 16, 25 16, 25 100 200 '00 500 Price $16.25 16.25 16,25 D.C MILLIAMMETERS Approll. Scol e Div, Res. 8B 50 8 50 50 1.1 40 1.1 50 2.0 50 1 40 0.5 0.33 '0 50 0 .2 Price $16, 25 16.25 16.25 16,25 16 .25 16,25 16,25 16,25 16,25 D-C VOlTMETERS 11000 Oh ml per Valli Sca le Pr;c.. Diy . Ran g .. $ 16 .75 50 5 16.75 15 75 16 .75 50 '0 16.75 150 75 17.25 '00 '0 D·C MICROAMMETERS Appro". Scot" Diy. Prlco Ran ge Rei. 4700 $22.25 50 50 '19.25 1230 100 50 40 16.75 200 '00 16. 75 50 230 50. RECT IF IER TYPE A-C-M OD El 1752 A-C MICROAMMETERS Apprax . Scato Price Diy. Ran ge Res. 525.25 40 2400 200 22. 75 750 500 50 A- C VOlTMETERS 11000 Ohms pe r Volll 5colo Price Div. Range $22.75 50 5 22. 75 75 15 22. 75 50 50 22 .75 75 150 22 _75 ,0 '00 MARK II ANALYZER Th e ne'" th in. line Mark II il a high ly se nsil iye and e xtr e me ly ru gged val l·ohm· mil1iomm e le, de signed fo r a wide ran ge of a ccura te test mea sure men l$ in th e o lee tra nic fi e ld. famou s CORMAG@ mechonlsm proteeh the in· strum e nt againJ! fahe readings duo to magnetic distu rban ces. Eleelro l latic shie lding auure l eccu- ,ole meo su,o monh 01 high d · c vollages. Fuses in Ih e low ohmmeto r circuits proyen t bu,nou t if volt· ag os are mi stakenly app lied. Interchangeable parh etiminato all nee d fo, parh le leclion in the evont replocemenls a re over necollory. Th e break. proof case will withstand droppIng and thu s e liminate th e maior SOllrce of repaIr and maintenance costs, FEATURES • Modern Th in-line De sign • Sp ring Bock Je we ls for Maximum Sho ck Resislance • Fused Resis tan ce Rang es • Tran , il Swilch Po s llian to Dam pon Movement DurIn g Tra nspor tot lon Mode l 980 Mark II Prke $44 .5 0 C ombination prate clive front cove r and t ilt s land __ .. __ .... __ ..... __ .... _ ... _ .... $5 . 50 • FlIlIy Insul a ted Craalcproof Case • Single Seleclor Knob for all Functions a nd Rangel • Wide Ang le Scal e fo r Maxim um Visibi lity • Precision Componenls-No Pa rh So lection Required S P ECIFICATIONS Aceu roq: 2°t.., d ·c; 30/0' o ·c. Sca le l eng th, 4 . 63" Ra nges: D. C Va lls, 1. 6, 8 , 40, 160, 400, BOO, 4000 . . . at 20,000 ohms/ Yo II. A-C Valls: 1.6, 8 , 40, 160, 400, 1600 •• _ ot 1,000 ohms/ yoll. DB Ra nge: ":'15 d b 10 + 54 db fin six rangesl . D-C Milliamperol: 1. 6, 8, 80, 8 00. D·C Microa mpe reS! 8 0. Full Scale Ce nter Scalo Ohms Ra nge 1,000 R, I 25 10.000 R x 10 25D 100,000 2,500 R x 100 megohm s 25 ,000 R .. 1,000 10 megohms 250,000 R x 10,000 • Single Boord El ched Wiring Circuit for Easy Malnlenance • Sialic Sh ielded for Aceurat& High Vollag& MOaSliremen t • A_Way Combination Tilt Siond and Prolocliye CO yo. Ayailable CO le: Block molded HYCAR, with carrying strap_ Break. res istant . Panel : Block mold ed HYCAR with e ngfayed whi le markings . Sile: 6.25" x 7.50" x 2.25". Approx. We ighl : 2. 5 Ibs. Ohms: Four dec(lde ,anges: 1 K 10 10 meg filII scale: 25 ohms 10 250K center scole. High Vo llo ge Probes, High yo ltage probes are ava ila ble for mea surin g high yollage s up 10 20 ky (II 50 microampe,es or lou. Probes hO YG mUlliplier resl slors encased in insu lated handles. Mullipliers are ra ted wilh a fla sh yolloge of 30 kY o PRICES SUBJECT TO CHANGE WITHOUT NOTICE T he AfA STER - Pag e 904 2<1eh Edidon Use Index ( pg . 2 J fo r Qu ic k. Easy LOCluion of ALL ProductS Nee Co/lyrig')I by U . C. P., i nc_ Sec:. 2900 4 'I." PANEL INSTRUMENTS D·C MILLIAMMETERS Range MODEL 961 MODEL 961-D-C INSTRUM ENTS Raled accura cy 2')'0 of full scale-Scale 3.17" (BO.3 mm)-Pe rmanent Magnet Moving Coil Ra nge 1 O-C VOLTMHERS Scale Div. P.rice $34.25 2 40 34.25 3 60 34.25 5 34.25 50 7.5 75 34.25 10 50 34.25 15 75 34.25 25 34.25 50 30 34.25 50 34.25 50 80 40 34.25 100 50 35.00 130 65 35.75 150 75 35 .75 200 40 36.50 250 50 38.00 300 60 38. 75 500 41.75 50 5elt·contained ranges Jlsted have sensitivity of app ro_ima tely 200 ohms per volt up and including 200 volh; higher rangu a re 1000 ohms per volt. 50 '0 Sca le Div. I 3 5 10 25 30 50 100 200 300 500 50 60 50 50 50 50 50 50 40 60 50 MODEL 963-THE RMO AMMETERS Appro •. Res. Rated accuracy 2% of full .•• Thermocouple type. Price $34.25 34.25 34.25 34.25 34.25 34.25 34.25 34.25 34.25 34.25 34.25 '0 7.3 2.' 1.25 1.0 2 I 0.5 0.33 0.2 frequency errors len thlln 2')'0 up to 6S mega.cycles. Amps. O·C AM METERS Scale Div. Price I 1.5 2 3 50 75 40 60 $34. 25 34.25 34. 25 34.25 Range Scale Oiv. Prico 50 50 50 50 $34.25 34.25 34.25 34.25 5 10 25 50 Regularly supplied with self·contained shunts up to and inc lud ing 50 a mperes, but can be sup· plied wit h external 50 mv shunts and 5 loot lO.065 ohm) leads. O_C MICROAMMETERS Approx. Range Sca le Oiv. Res. Ohms 30 60 1600 50 720 75 75 450 100 50 250 200 40 <00 300 175 60 500 50 SO . Price $50.00 48.25 48 .25 48.00 38.00 38.00 38.00 MATCHED A-C AND D-C PORTABLE INSTRUMENTS MODEL 433-A-C INSTRUMENTS Scale Length 4. 04"-Accurocy within J/.. of 1 % - Movable Iroa Type - Shielded Case Sile 5 -1/ 16 " x S1/.. " x 3 1/.. " -Welght 21/2 Ibs.-Hand Collbroted Mirror Scol es Bakelite Case with Carrying Strap . Note: These Instrumenh a re calibrated for use in a ho ri zonta l position. A-C VOLT~ETERS Ma de with single, d ouble and triple ranges. Fo r use on frequencies from 25 to 125 cycles. Range Pri ce 10, 30, 50, 75 $ 85.75 10/ 5, 20110, 30/ 15 87.25 450/ 300/150 103.75 600/300/150 103.75 750/300/150 103 .75 A-C MILLI AMMETERS Made in single and double ranges only, for use on frequencies Irom 25 to 500 cycles. Range Price IS, 30, 75, SOD $ 79.25 300/150 91.75 A-C AMMETERS Made in single, double an d triple ranges for use on fraquencies from 25 to 500 cycles. All instruments have two binding posts; double and triple range instrumants are provided with a range selector switch. Range Price I, 1.5. 2, 3 $ 80.75 15, 25, 30 80.75 2/1. 5/2.5, 10/5 93 .75 1/1.5/0.75, 5/2.5/1, 10/5/ 1 131.75 20/5/2, 30n .5/l. 50/20/5 131.75 • • • Scale 3.17" POWER CO NSUMPTI ON: I to 4 amperes Incl. varies from 0.2 to 0.4 wlltt per IImpere. Appro~. 5 amperes lind above-Q.2 watt per ampere. Ranges above 25 milliamperes are shunted and have II drop of appro_imiliely 100 millivolts. Range ~cale MODEL 432-0-C AND SINGLE PHASE A-C WATTMETERS Double voltllgo and single or double cur· rent ranges. solf·conta ined up to 300 vol ts ond 5O.omperes, frequ encies from 25 to 125 cycllll. El ectro~ynamometer Type Accuracy 112 ~ I ' '-0 ___ Scale Length 4.04' Case Site 5-h ' It SV.. " x 31j.. " __ Wt. 31j.. Ibl:. Normal Volts Normo l Amps Price 150/ 75 .1 $173 .75 Double Current Ronges 300/ 150 5/2.5 173.75 Scale Div. Price Amps. 1 50 $43.00 5 1.5 75 43.00 6 2 <0 43.00 2.5 50 43.00 10 3 60 43.00 15 4 40 43.00 20 The ronges are all self·conloined. • Scale Oiv. Price 50 60 <0 50 75 40 $43.00 43.00 43.00 43.00 43.00 43.00 Through the Ille of ~pec i olly controlled chorocleristics, thermo ammeters clln be supplied to meet the special requiremenh of the FCC for lintenna amme ters, MODEL 962-TYPE 30 VU METERS Model 962 VU Meters are availa ble with II choice 01 two scales. Type A streues t he lavel in VU and is used largely in monitoring wi re lines. Ty pe B emphasizes per cent uso of transmitter output and is the standard fo r broadcast service. Scale backgrounds dra buff coiolld . Sccde A or B.. ..... Model 962-$55.50 MODEL 931-D- C INSTRUMENTS Scale Length 4 .04" -Accurocy wi thin '/2 of 1 "/0 Core Magnet Moving Co li Type. Case Sizo 5-1 /1 6" x S1/4 " x 3 V.. .. -Wei.ght 2 Ibs. Hand Calibrated Mirror Scoles Bakelite Case wit h Carrying Strop. Note: These instruments lire calibra t ed for Ute in a hori zontal position. D·C VOLTMETERS Price Net Price 5,000 Ohms 1,000 Ohfns Por Volt Por Volt Rang e $ 89.75 $ 78,25 1. IS, 50 103 .50 92.25 300/150/3 103.50 92.25 750/300/150 O_C AMMETERS Price 5 79.25 I , 1.5, 1, 5 92.25 10/15/3 92.25 50/20/5 Self·contalned up to 50 amperes inclusive, but can be supplied with eKternal SO mv shunts and 5 It. leads. O_C MILL1AMMETERS Range Price 15. ISO 5 76.25 1500/lSO/ 15 89.75 15/ 1.5/.15 101.25 Single ra nge Milliammeteu with ranges above can be supplied with exttrna l 50 mv shunts and 30 ma are shunted and hllve a drop of SO mv = 5')'•• D-C MICRO AMMETERS H' hR' ta nc~ ,--low Resistance---. Range 'Ap ~?ox. OIlS Approx. Price Res. Ohms Price Res. Ohms $103 .50 10 2300 101. 25 490 $101.25 100 2000 89.75 60 89.75 200 600 84.75 15 PRICES SUBJECT TO CHANGE WITHOUT NOT ICE Use Index (pg. 2) for Quick, Easy Loca!ion of ALL Products No. The MASTER-24!h Edition Poge 905 Sec:. 2900 WESTON INSTRUMENTS · MODEL 1477 ELECTRONIC MILLI-VOLT/ AMMETER This yersatile Electronic Millj·YolI / Ammeler providc" in (I single, compact, light· weight unit measurement and amplifi cation of a wide span of doc curren l and volloge rang es. Tho Weston Mo de l 1477 uses a unique electronic servo-amplifier whose oltlreme high gain, cOlJpled .... ilh lull leedbock, providos a ccuracy an d dability wilhout the od.,.eno affech resulting from vorig iiOll1 of line vollage or frequency, condition of omplifier lubos or olher variables. No medlonkal switches or choppers ore usod. Th o device is (I true doc metor wilh zero.drift comporoble 10 (I typicol permanent mognet movjng coil lrnlrumen!. II offers Ihe advantage of enonliolly zero power- drain from the loure6 being meosured, ond combineli thi li with power·goin suificientto liupply 1 ma output to drive its oWn inditoti ng me ter , and any edernal lood of 5000 ohms or len . The power output is oYailoble att er minol s in th e bock of the unit. The indicating instrument, incorpo rating the fomous Weston se tf-shielded CORMAG@ mechanism which permits it< u <e in do.e p 'o>< imiry to m09n.t i" Ii. ld , without offec!ing o ccu.oey, knife .edoe point", ond mirror seol", 011 cern · bi ne 10 provide dependoble performo nce a nd unmotched Visibility. Cotib(otion is dependent only on precision resistors in th e ronge stnndord. No tube le lettion is neeeuory when 'eplocements o,e needed. Neither input or oulpul need be IIrounded, but if gro undinll is desired, either side or some in termedin Is point con be grounded. Output polarity may be se lected 01 will. • Since zero·drifl is dependenl only on position of golvonomster coil, lanll -lim e drift can be moinroined to less than 2 microvolts afler a few minules warm_up lime. • Gain stab ility and output linearity are both within 0.1 % 01 (onoe s obove 1 mY or 200 /.10. • Resolu tio n capability i5 within 2 microvolh o r .02 microomperes. • Adjustable to zero· leI! or zero·cenler. • • SPECIFICATIONS Ranges, 10- 20-50- 100-200·500· 1000 mic roa mperes. 1-2-5 -10-20-50- 100-200-500-1000 millivolts. Accu racy, 2% on lowesl current and lowest potential ran ge. 1 "10 o n a ll others. Instrument Scale: mirror, 7. 12" long i black and red pri nti ng o n white dial. Approx. Sil:e: 7 J4" wide x 6%" high x 4%" d eep. Appro:.:. Weight: 5% Ibs. Power: 105·125 valls a·c 50·1600 cycles, 35 wal ls internall y fused. Ampli fier Compone nt : Weston Model 1411 INDUCTRONIC® DC Am· pl if ier. Model 1477 -Price . ................................................................ $355.00 SUPER-SENSITIVE ANALYZER MODEL 779 ACCURACY: A.. C w ithin 3%; D-C within 2% to 250 volts; 3% on 1,000 volt ra nge. Size: 6 ~~" x 9 1/," X 47;''' ( 162 x 232 x 124 mm) Approx. Wt.: 6 lb. (2.72 kgs.) A compact 26 range ultra-sensitive analyzer with fi ve d ·c voltage ra nges at a sensitivity of e ither 1,000 or 20,000 ohms per volt . A-C tempe ra ture compensated; precision resiston throughout. Supp lied in a ru gged solid oak case with a removab le cover and convenient carrying handle. Test leads are prov ided. RANGES Current D·C O nly Volt, D_C 2.5 A-C 2.5 10 50 10 50 10 Ma 250 250 1000 50 250 Mo 1000 Decibels 14 to + 2* .1 Mo 1 M. 2 10 + 14 " + 12to + 28· + 26 to + 42t + 38 10 + 54tt Ma Ohms 0·3000 0·30,000 0·300,000 0-30 Meg (6 milliwalls, Amp 500 ohms, zero love I) * Subslantio lly flal to 10,000 cycles . -;- Substantially flol 10 3,000 cydes. tt Subs lonliolly flot to 1,000 cycles. 1 10 Model 779 Typ e 1 Price ..... _.... _..... $151 .25 Amp ............................ .................................. MODEL 799 INSULATION TESTER ACCURACY: Within W' of s cale length. Size : 7<6 x SI,~ X SCALE: 2.375 " (60.3 mm) 5" (86 x 133 x 127 mm) Appro x. Wt.: 3.8 Ibs. ( 1.7 kgs.) For leakage measurements up to 10,000 megohms at low vo ltage a t a maximum tes t potential 50 volts. Test leads, tubes, batteries and oak case arc supplied, RANGES : 0-10,000 megohms ( l ogarithmic scale) Price .......... _ ........... $86 .5 0 PRICES SUBJECT TO CHANGE WITHOUT NOTICE The MASl'ER-2 4th &lidon Page 906 Use Index ( p~. 2) fo r Quick. Ea.s~· Net Location of ALL Products Model 799 CO/JJ'r;gbt b)' U. C. P., ln~. Sec. 2900 WESTON INSTRUMENTS WESTON MODEL 981 PROPORTIONAL MUTUAL CONDUCTANCE TUBECHECKER FEATURES METER MEASUREMENT OF HIGH LEAKAG E RESISTANCE: Proyidu <1n accura te meter mealurement of leakage resista nce lIS high 4S 5 megohms between tube elements, thus be ing particularlv us.ful for TV servicing and TV line production a nembly. MULTIPLE SWITCHING f ACI LITIES: Protection against obsolescence is assured through the uso of nine single circuit, twelve position . selector switches. TWIN SECTION TUBES: Three toggle switches mob it possible to rapidly che ck a nd comp"r. the respective seelions of twin uletion tubes at only one setting of t he seleclor , .... itches. SINGLE SOCKET FOR EACH TUBe BASE REGARDLESS OF TUBE CONNECTION: Eliminates th e possibility of p lugg ing a tube into the wrong socket . Gm MEASUREMENTS: Gm measurements are made more accurately by using filtered d ·c plate. screen g rid and control grid pate n· tials. A precision volta ge divider network and selector switch allows a proportionate va lue of signal voltage to be chosen for testing tubes having t ra nscondudances up to 30,000 micromhos. ';1nal voltaqes of 5.2, 2.6, 1.3, il nd 0.65 volls peak·to·peak havi ng a requency of 5000 cycles a re provide d . ROLL INDEX CHART -A complete Hieing of lu be tes! dolo is ovoi loble 01 Ille fli ck of 0 finger by meons of on easy·to· read, buill· in ro ll chort. LEAKAGE TEST: The leakllge tests are performed a t a doc potentia l of 125 volh. For each numbered position of the LEAKAGE TEST switch, a specific tuba element is isolated and connected Into a series ohmmeter circuit conshtin~ of the isol a ted element, the 125 volt d ·c potential, /II current lImiting redstar, a millia mmete r, a nd all othe r eleme nh of the tube. SPECIFICATIONS VOLTAGE REGULATOR TUBES: A selenium redifie r supp ly furnbhes 200 volts d·c for testing of voltage regulato r tubes. FILAMENT VOLTAGES: .65, 1.1, 1.5, 2, 2.5, 0.6&, 3.3, 5, 6.3, 7.5, 10, 13, 20, 27.5. 35, '17, 70, 115. PLATE VOLTAGES: 9(), 130, 22D volts d·c; 22, «, 160 volts a·c. SIGNAL VOLTAGES: 5.2,2.6, 1.3.0.65 volts pea k·fo. peak. Gm RANGE: Up to 30,000 micromhos. POWER REQUIREMENTS: 100 to 125 volts, 60 cydes slnglo phase a·c, 30 wath . CAS E: Grey hammertone finish e d steel. SIZE: 17.50" .. 13.25" .. 6.00". WEIGHT: 23 1h Ibs. (1 0.7 Kgs.). SUBMINI ATURE TYPE TUBES: A 'IS volt potential source facilitates testing of subminiature t ubes. Model 981 Type 3A. ......... _............................ Price $283.50 Model 749 Miniature (lamp Volt·Ammeter Model 633 (lamp Volt·Ammeter and (lamp· Ammeter MODEL 633 Type VA-T Price Model 633 Type VA-I /lnc1. Potenlial l eods) - 1000/ 250/ 100/ 25/ 10 amperes o·c 700/ 350/ 175 vall S 0 · ( ... .......... .... $112 .50 Model 633 Typo A_3 - 2000/ 1000/ 500/250/100/ 50 amperes a .c ............................................................................................. $105 .25 Model 9958 , SO foot Extension Cable, Plug & Receptacle for Mode l 633 Types A· I, A·2, A-3......................................... S 72.00 l e ather Co,rying COle (Model 633 Types VA· I, A·I, A·2, A·3 ) S 13.50 l e alhe r Carry ing Case (Mode l 9958 - Coble. Plug and Re· ceplocl e) .............. _..................... _ ................ _.................... _.. _ S 22.50 light weig ht ond rugged pockel·sile in ~ trum en t for quick easy se ..... 'c' ng. Has self·shielded core magne l mec ha nism with Ipri ng ba cked jewel s, a nd sha ller· proof PleKiglas window. Only one scole for all range l and func tionl. Jaws toke up 10 I" rou nd, or P /. " x l/," re ctang ular conducto rs. fU in ished .... ilil teu leeds in scuff· proof case. Plug. In Ada pler a va ila ble for ma king bolh (Urre nt and voltage mea l ure· ments . .. has female recepta cles on balll lides fa, plugging in load wit h. oul distu rbing circuil be ing lelled . . . (anve nienl fo, lead inulion for vollage chech • . . se ..... es os 10 to 1 divide r for low curront mesau re. me nI, . RATED ACCURACY, (Model 749) ± 3% full scale dl!lIedion. RANGES , Current 300/ 1.50/ 60 / 30/ 15/ 6 ompore, a.c. VolTage 600/ 300/1 .50 vall$ a .c. Mode l 749 - $44.50 (omplete Plug.ln Adaptor - $4.75 Copy,ight by U. C. P., h ie. NOTE-M od e l 633 instrume nts may b e used lor continuous duty up to sao ampe res • Approximate Dimensions and Weights Mode l 633 Ty pes VA· I , A- I , A·2. A·3 .............. 13;DX4W·x2'h .. 3 1h Ibs. l oot her Carrying Caso (Types VA·T, A-I, A·2, A-3) .... T4V2"x5'h" x3%" 2'/.1 Ibs. Mode l 9958, 50 Foot Exlens ion Coble, Plug & Receptocle .......... .. 4'!.. Ibs . Leather Carrying Case (Model 995B-Coble, Plug & Re ce ptocle} 14"x81f2"x33/4" 4 \;4 Ibs. PricBl Subjoct To Change Without Notice. Usc Index ( Vg. 2) lor Quick. Easy Location of ALL Producrs Net The MASTER- 24rh Edition Pogo 907