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illrrrrrrW - Free and Open Source Software
illrrrrrrW - Free and Open Source Software
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Photos I and 2 show the meter built in<br />
a Bakelite box with aluminum pan el. I have<br />
measured the resistan ce of a loading coil 01<br />
a new Hustler mob ile antenna and compare<br />
d it to my old beat-up one. I planned<br />
to bu ild a dipole out of th e two of them<br />
and wan ted to be sure everything was<br />
okay. Resistance of the probes I used was<br />
O.2n, by shorting th em together, the total<br />
reading (p robes + coil) was l. On . Therefore<br />
the coils were O.8n.<br />
Other uses will suggest themselves. I<br />
hope you will find thi s novel instru ment as<br />
useful as I have.<br />
~O~<br />
OWW-WiTEi<br />
II , . .<br />
. . .W3YCZ<br />
la tio n . Application notes and d ata shee ts are<br />
ava ilable from the m a n ufac t urer . Prices range<br />
fr o m 81.50 t o 56 .5 0 in small q u antities. E ast r o n<br />
Corp., 25 L o c u.st sr., H aver hill M A 0 1830<br />
Doubte -batanced MI C Mixers<br />
Cerasea l series , a ceramic case enclo ses t h e u nit's<br />
active la yers. A thin epo xy coating is a pplied t o<br />
the finished u.uf f or add itional prot ec t io n , Use o f<br />
the ceram ic cas e , which is f o rm ed as an integr a l<br />
par t of t he capaci tor b efore firing, results in the<br />
prod uetio r. of a truly solid-state ca pa citor t ea t u r<br />
m g monolithic construction comb ined w it h co m <br />
pl e te her meticity fo r u se in aerosp a ce :hcomputer,<br />
and milit ar y ap-pli cations. A ero uo x vcrp. , N ew<br />
B ed ford MA 02 74 1.<br />
Amat eur R adio V aractors<br />
A new family of high Q vara ctors fo r a mateur<br />
ra d io se r vice in a p plication fro m i-f ' s up thro ugh<br />
450 MHz. These varactors n ow mak e pr actical<br />
ve r y compact equipm ent by re pl acin g m echanica l<br />
tuning wit h elec tronic tuning. Ama t eur u se s<br />
incl ude AFC. in cremental tuning of transceive rs,<br />
remote cont rol, and SIm plified frequency m odu-<br />
FEBRU A RY 19 71<br />
A n e w series of double-balan ced Ml C (micro <br />
w a ve integrated ci rcuit) mix ers combines low <br />
noise performance and wide bandwidth. T he<br />
mi xer -preamplifier (ill ustrated) provid es m ultioctave<br />
b andwid t hs, lo w 1M distort io n , a nd b eamle<br />
ad Scho ttky d iodes. Avai lable w it h hybrid Ie<br />
pre amplifiers as well as d iscr ete com ponent u ni ts.<br />
RHG Electronic s L a b o rato ry, I nc., 94 -,U ilbar<br />
Blud . , F armingdale N Y 11 7 35 .s,<br />
1 9 71 Te ch nical and Scientifi c<br />
Boo k Ca t alo g Availab le<br />
An SO-page ca ta log describ es over 650 h ardb<br />
ound an d paperback boo ks w hic h cover vir t u<br />
all y ever y t ech nical and sci ent if ic discipline.<br />
Special sectio ns in the catalo g feature "do-Ityo<br />
urself" t itl es a nd amate ur rad io pub lica t ions.<br />
Vocational educa tors and ind ustrial t ra ining d irectors<br />
will fi nd t extbooks, in structor's guid es,<br />
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" T e xt a nd Training Materi al s for In-Pla nt a nd<br />
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availab le fre e fro m T h o m as J . E ast w o o d , D irector,<br />
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B9