HICKOK

Curve Tracer Featuring Exclusive INiSTA-BETA display There s no faster more accurate way to test semiconductors in or out-of-circuit than with the Model 440 it generates instant scope displays showing the exact performance of any diode, transistor or FET over its entire operating range. From these actual characteristic curves you can quickly test, identify evaluate, ctassify and match devices . . find substitutes , . iroubleshoot defective modules on the bench or production lime . . . and...

Info

Gives ideally shaped receiver bandpass for reduced adjacent channel interference. Get on 2 with the 202. for only 179.95 HW-202 shown with optional Tone Burst Encoder installed. Neat mobile mount, supplied with your hit, attaches under your car's dash, Remove two Knurled screws, unplug two cables, and the radio and Eim-bat mount cart be quickly removed fur sale keeping. Open design makes the tiW-202 easy to build (shown with encoder board Instated). Nine built-in adjustments let you align...

Arrl Election

One of the California club news letters had a good deaJ of info on a contesi for Director between Doc Gmelln and Bill EiteL I hated to see amateurs faced with a choice there as both are fine men , . . Doc has been at the ARRL Director biz for years and knows his way around he is a tremendously likeable bouncy guy with a fantastic sense of humor and a bright inquiring mind. Bill Eitel. recently retired from Eimac, by far our foremost manufacturer of powef tubes for hams, has something Tha is...

Be my guest

Visiting views from around the world Early one morning 1 was watching the tube. They had a program on tailing about communities who jot Federal money and some good hut ion by banding together and legislating I got to wondering if we hams couldn't do something like that. No big national organization was telhng these commumtjes what they needed. The ideas cam irom the r gt eoo e who were going to be affected by the changes. The program told about a beautiful wooded area which was just sitting...

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Note Cut off pin 4 of ICs 2 and 3 SN7490 . rf voltage with an rf diode voftmcter at pin 11 of IC14t It the rf voltage is low or unstable, i recommend that you change the value of the base resistor of transistor Q3 or the transistor itscfi. Unstable or low rf voltages e.g,, under 2 V will result in unstable or no display of the measured value of capacity, So gel it to work one hundred percent. This is probably the only difficult part of the whole instrument. The rf output from 1C14A is...

Gated Rainbow

Gated Rainbow Generator

Only our unique MOS LSI circuit-y can give you tnese nine, stable, FCC Specification signals .r io tmalj dnd ru ed a unit. It has everything you ever wanted. It does everything you'll ever need. The snrmll-cube Model 246 Deluxe Color Bar Generator with advanced soiid state circuitry provides 16 stable patterns including a gated rainbow for testing aligning collor circus. I ts threegun killers with piercing clips let you selectively kill the red, biue and green gun grids in the set you're...

Suggestion

11 there is a nam who has a General ttckei for above J and wants to help others here 5 a suggestion. Many Novices and non-hams enjoy listening to the voice bands. H j General ham would give instruction to the Novices and non hams, it would be great A General class ticket is very important to me and Other Novices, I'm sure, NO TE Times and Days art. given in GMT

N

You are with cheap sources of TTL integrated circuits, Maybe most of them are in your junk box. The basic principle is very simple and well known the only difference is how il has been used. A similar unit was described some lime Ago, but it measured only higher values of capacitance, and used different devices. Fig. shows the block diagram of the C-meter. The heart of the unii is the monostable multi-vibrator MMV , which produces gating pulses. The length of these pulses is direcily...

Ham Radio Hr 1976 Archive

Mhw710 Atv Circuit

Despite the advice of some engineers that it could not be done because of an internal decoupling network, electronics engineer Irwin Dresner W2TRP, of Syosset, L,l. NY , succeeded in video modulating a Motorola 440 MHz MHW-710 power module wnh a full 4,5 MHz band wjdlh TV signal. His fifteen Watt output signal, coming From a palm sized solid state TV transmitter, was received by K2RIW, W2KPQ and WA2APJ on September 2nd during the weekly meeting of the LI MARC ATV Technical Net. W2TRP wili make...

Heathkit Oscilloscope

Heathkit Oscilloscope

95 Amateur Tests and Measurements te 11 in simple language how to mak all necessary performance tests i adjustments, on transmitters, receivers amp antennas. EDP-119, 73 Difiolre and Long-Wire Antennas includes mentions confie rations, construction amp measurements c ala for 73 different antennas, E P 73 Vertical, Beam and Triangle Antennas - conla.ns ron struction. design amp measurement data on practically aH type5k o .inlennas used by amateurs, 4,95 3.CM Heathkit products are the result of...

Name Change

Downing note the NSD there , claiming lo be a CO fan 1 knew he was .u ing me Eeg r.uht t tore l and to be rritated by Wayne Green lyou have to be dead from the neck up if I don t get to you . Then he goes On to praise the magazine outrageously . . the articles and even the beneficence Of ads. I can read Jetters tike that all day. But that Nenad S. Downing began to percolate through . . . Iimm , . nowr with a small change to Nayne, the middle initial is there...

A

Positively the Hickok Model 512 Dual Trace Oscilloscope is the ultimate signal tracing instrument for all TV, audio and radio servicing jobs. The Model 512 has all the features of our lab quality single trace Model 51 1iH plus the versatility of four dual trace modes. With dual trace capability you can display either Signal A or Signal 8 alone, or both signals simultaneously in these dual trace combinations Alternate A and B, Chopped 100 kHz A and B, A plus B, and A minus B using the trace...