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Television Interference Handbook Send to Television Interference Handbook Send to to determine the correct physical line lengths. Fig, 3 shows two practical examples of both a tuned circuit and stub type combiner which can be used to couple 20 and 40 meter transmitters to a single antenna for simultaneous transmission. The tuned circuit combiner of Fig, 3 (A) is shown as it might be used in a coaxial cable transmission line system of any impedance. The transmission line from each transmitter...

Info

. . iiv d.F. . i - - ' 'i- > b i i. - t i, .*iL I. - -v ' s . -. - i.'*. Hiram, a Basse tl Hound Dawg, originated by Don WA6PIR, art by XYL Maxine. ta ** a + *TfVVIVVViJ _ . j Ir . . r I ---------- . - - . - H I i ------ - 1 . - * . v * - - - , i1-'1 -' *r ri il ( -1 . 4irt*jf-tritl ir- *P fr** I r r . -.I - -m k-1 * - i -1 t - - -I*-- - - f. ________ pis -**-* t t* , , '- 'FIT t - J ti LiTtm ti-iH - - . t.n iii -Tin i-**- ----- . . HI-, T-'iriM t > . i iisiiijiv -riti > - Ii JUtlM li---...

New Meter Fm Transceiver

Frequency 143-149 MHz Number of channels 5 Supplied with 146.94 simplex, 146.34 .94 (same plug in crystals as SR-C826M) R.F. Output I watt minimum Sensitivity belter than 0.4 Audio output 500 mw Meter monitors battery voltage on Current drain 400 maTx, Size, 8 h high x 3 wide, x IV deep Weight 24 oz., less Options externa mic,or mic-speaker, stubby flexible antenna, desk top charger leather case. Consider the new VHF-FM hand held Transceiver hy Standard Communications Corp., with ex elusive...

Vhf Fm Frequency Decals

Peel off & stick on. i .00 postpaid. Check or money order. Electronic Systems, Inc P.O. Box I 1208, 1518 Gregg St., Columbia SC 29211. RADIO-TV SHOP SELL Retirement. All instruments, parts, hand tools, Sams Fotofacts, books, Caddy I-Com & 2-way. Have names Simpson, Precision, Sprague, Seeo, Sencore, Jackson, Paco. Check VA for funding. BARGAIN. Must sell before MAY 72. FONE 814-652-5 126 day only. Dick Myers, 122 W. Main St., Everett PA 15537, (very old wireless...

Standard Communications Corp

California 90744. (213) 775-6284 James J Wensfcus, Jr. K2BEH 329 Ballad Ave. Rochester, NY 14626 James J Wensfcus, Jr. K2BEH 329 Ballad Ave. Rochester, NY 14626 Teletype Repeater TT-63A FGC is an inexpensive and widely available piece of surplus equipment. Although many amateurs have purchased this unit, problems in getting it into operation have resulted in most i f-63As gathering dust on a shelf or filling up useless space in relay racks. (Il has a neat...

Amateur Radio Extra Class License Study Guide

A The Novice Class License Study Guide has not yet bee n published In 7 3 or in any other magazine. This book contains all the basic technical information need to pass the Novice License with flying colors, . .and is invaluable as a basic text for understanding the General Class Study Guide. Profusely illustrated and so clearly written that just reading it is enough to permit most applicants to pass their exam. 3.95 value. B The 73 General Class Study Guide has helped tho u sands to easily pass...

Drm Amateurband

The dotted lines show the current distribution on a full length vertical antenna A and various forms of physically shorter, inductively loaded antennas, produce the current distributions shown in Figs. 1C and ID. Various points can be advanced for either top or bottom loading. Top loading has the advantage that the greatest current flow will take place in the metal rod section of the antenna and, therefore, less I R losses will take place in the loading inductor on top. Bottom loading...

Wjk

USABLE SENSITIVITY 0,5 uv or less for 12 db S1NAD AUDIO OUTPUT 2.0 watts with less than 10 2295 N.W. 14th St. Miami, Fla. 33125 Ph 633-3261 This is an amateur model of the very well known Simpson Model 1 marine transceiver, a four channel 150 MHz FM transceiver. The amateur who is looking for an American built unit of exceptional quality would do well to take a close look at the Model A. Some of the features which make this transceiver so interesting to the...

Rectifier Information

Hams working in RTTY, FM, and those experimenting with logic may find a new Motorola silicon controlled rectifier useful in low power switching. detection and sensing, and control functions. These units draw very little current from the circuit and are less than one tenth inch in diameter Write to the Technical Information Center, Motorola, Inc., Semiconductor Products Dir Box 20924, Phoenix AZ 85 036 and ask for info on their Mlero-T MCR051 through 054 series, A new air-eooied, 3 kW...

Npn High Power Uhf Transistors

TO-5 - 709C Operational Amp . 7 IOC Differential Amp . , , , 3 71 IC Memory, Sense, Amp . TVR-2000 H power 723 iD P gt 741C Freq Comp, 709 ' 74SC Freq. Adjustable 741 709-709 Dual 709Ts DIP . . . 749-749 Stereo Preamp DIP . S3.00 1.00 l.OO 1,00 3.75 3.95 2.50 2.50 4.00 5 50 5.50 Stale Jfilp 2nd choice, Dual In Line, TO-5.

Dx Chart

You will use this DX chart eve day that you are on the air. That's guarantee. This is the fastest way find the angle to swing that bea hese charts are made by a compul and are custom made for your o lt tion. The angle and distance to all the countries of the world are on t chart. This chart should cost you S but it doesn't . . . send only S4 a thank your lucky stars that there is ham who is offering this service mc for fun than profit. Lucky for you wt1 still have atlas These are not cheap...

Highsensitivity Wideband Receiver

COMMUNICATIONS BUG DETECTION SPECTRUM STUDIES 38-1000 MHZ AN ALR-5 Consists of brand new tuner converter CV-2 amp 37ALR in original ftictory pack and an eXC. used checked OK amp grtd main rccriver Fi-4 44 modified for 1 20 v, 50 60 Ei , The tuner covers the range 111 4 bands each band has its own Type N Ant, input. Packed with each tuner is Lhe factory inspector's checkout sheet. Thi one we opened showed SENSITIVITY 1.1 uv at 38.4 mh OM lt it 133 mh . 5 at 538 mh , 4' at 77H mhz, 7 at 1 ghz....

For High Frequency Receivers

Hen today's oldtimers were learning the code in the 20s and '30s, they copied a lot of it on the medium-frequency shipping band. Today's communication receivers seldom cover the broadcast band, let alone frequencies below 530 kHz, There are many interesting signals to be heard on 500 kHz passenger liners, cargo ships, coastal stations, commercial traffic, ship position reports and weather bulletins. he MCW signals on these frequencies pack a distinctive punch fellow ex-marinc radio operators...

Balanced Bridge Modulator

Simple Synthesizer

Circuits aire superior to pentagrid or triode mixers and their solid-state counterparts, since only audio is present in the output, A pentagrid mixer product detector would have the two rf carriers present in the output, which could produce a little distortion or noise, Going back to the mixers, in the original superheterodyne circuit, the local signal came from a vfo. In dual-conversion receivers, a crystal oscillator is used. In the more sophisticated receiver, they use a synthesizer. A...

Digital Multimeter

Triplett. after all these years of being first in the meter biz, has come out witli a digital v-o-m Billed as a 2 digit meter, the last figure tells you whether the number is above or below five. The price is 2 centibucks, which makes it a little high for the average ham shack and probably of more interest for lab or service shop use where the time saved fey using this meter could eventually pay for it. Triplettr Bluff ton OH 4581 7 will be delighted to tell you all about it and ecstatic if you...

Frequency Marker Deluxe

100 kHz markers have been around for a long time, but they are inadequate to meet the demands for band edge marking and calibration with todays split up ham bands. How many operators know for sure exactly where the 3KZ5 band edge really is Or 14275 Large scale integrated circuits make a low cost relatively frequency marker possible today which starts at 400 kHz, splits that to 200 kHz, 100 kHz. 50, . 25 10. . and even 5 kHz Data Engineering Inc. has announced just such a unit and is marketing...

Editorial By Wayne Green

A call from W7DXX got the juices boiling for a ten meter link channel between FM repeaters around the coimtry, or even around the world. As a result I have ordered a lhtie ten meter KM rig which we will be setting up in conjunction with WAIKGO to send and receive on 29.68 MHz wilii tone access from the 19-79 two meter service. When six meters opens up I have a great time through W1ALE in Concord, N.H., which has a 52.525 MHz function connected to its 46 -94 operation. Ten should be even more...

Mew Frequency Synthesizer In The Works

Vanguard Labs is hard at work on their frequency synthesizer for FM and you should see announcements soon tor a transmitter model with output on y, 12 and MHz lor two meter transceivers and hitting every 10 kHz for around SI 00. f his one will operate over a I0,jt temperature range. Andre will have one for 0 to 70 C for around SI 50.

Robot Model 70 Sstv Monitor

High Sensitive Tuner Schematic

The signal diode on the indicator input point A of the schematic diagram should Fig, 2. Tuning indicator displays. The no-signal state is shown in A. B shows presence of a steady L2 kHz signal C is a 15 Hz flickering to indicate thaf the SYNC signal is in tune. be connected to the high side of the SYNC gain control R1 of the MacDonald circuit . High voltage for the indicator is taken from the same voltage as that supplied for the I2AX7 limiter. With a 1200 Hz test signal connected to the input...

Ada

I, I , T. 1J r H' .n -' ll IP - -- t r H H .U'L'. i' I Jl- I . ' gt gt . ,, 11 II.J L d' I nil I , I F' ,. ' r, I 'I.HH' d.rr.F . , , i . i I I . d' , i rm 1 1 - i, . i- i J h I d I b'ld- ' H -l.il l-l .,', ,d''dd l. . I , , r , . t V' . .it.tti-.--' . .j ' lt . mi In . d i t ., r ij i III I 11 -J J 11 Id JJ. illlILl Mi, IT -in c r in llim. II -'i TJ1 . I .r . tv._ _ xi ' . . E 1 , I - - - n uli'.d it, FVFl . j r.i -H ' . . - - li 11 F-t- gt X .uIHtK, t 11 Peace Through Victory, originated for...

Motorola Volt Xtal Oven

Vi tb . 1.00 RCA 12 VOLT XTAL OVEN -ship wt. V lb. 3,50 GE 12 VOLT XTAL OVEN-ship wt, 4 b. 3.50 4 COND. MIC, CABLE - Coil Cord - 2 shielded 2 unshielded - 30 retracted 15' extended ship wt. 2 lb 6.50 BRUSH 4 CHANNEL CHART RECORDERModel RD2341 with DC Amplifiers and cables-ship wt 75 lb 250,00 See other ads for our IC prices and write for our catalog. Slop in and see us when you re in St. Louis. SOLA CONSTANT VOLTAGE TRANSFORMER, type CV, 22-962 5E93, 1000 Va, 108-132 volts input, 118...

Fm Repeater Handbook

K6MVHL Book is required for all repeater operators and must reading for all FM'ers. Only complete book on the subject. It is also one of the best selling books in amateur radio todav. THE BEST OF FM A huge selection of FM Journal's finest technical and conversion articles, never before reprinted in any other magazine. The concluding segments of those c o n tr oversial t CHRONICLES Selected FM editorials to show a broad view of the problems faced by FM'ers. This book comprises Volume II of the...

Freck Radio Supply

38 Biltrnore Ave,, Asheville, N.C, 28801 Large Stock of Used Equipment. FREE list upon request. We stock Collins Drake Galaxy Kenwood Signal One Swan Tempo Hy-Gain Newtronics Several Others, Tenny Freck W4V L Sandy Jackson Mgr. Harvey Nations W4VOV arprox 60 mh-65 turns no. 14 awg 2-j 2 m dia, arprox 60 mh-65 turns no. 14 awg 2-j 2 m dia,