Heathkit cantenna dummy load book

The task of sourcing the appropriate oil fell to the buyer to purchase. Anybody have the heathkit cantenna dmmmy load manual that i. In radio a dummy antenna is connected to the output of a radio. Heathkit assembly manual cantenna dummy rf load model hn.

If you still want to use a fluid dummy load, then just use a liter or more, watch the temperature if you need to transmit for more than a minute at a time, and move on with your testing. Condition is used,dispatched with courier delivery. Be careful with old dummy loads kb6nus ham radio blog. List your items fast and easy and manage your active items x i will mail via usps 1st class mail in a. A cantenna is a homemade directional waveguide antenna, made out of an openended metal. The author provides a brief description of heathkits.

Equipment available updated 20190218 athens county ara. As a 16 year old novice, i used a 100w bulb as a dummy load. Heathkit manual cantenna dummy rf load model hn31 ebay. Hn31 cantenna model dummy rf load heathkit assembly manual. In 1961 heathkit, using its quantity buying power, introduced the hn31 cantenna dummy load. Antique radio forums view topic dummy load question. Run continuous duty with 200 watts cw or 400 watts pep. A book that has been read but is in good condition. Heathkit schematic and manual archive vintage radio info. If you are wondering what amateur radio is about, its basically a two way radio.

If you would like to participate, you can choose to edit the. Book depository books with free delivery worldwide. The cantenna acts slightly inductive at uhf but addition of a small capacitor cancels this inductive reactance. Second hand heathkit hn31 cantenna dummy load rw uk.

Free heathkit diagrams, schematics, service manuals. Such setups are widely used in wireless community networks for longdistance wifi links. Second hand heathkit hn31 cantenna dummy load, heathkits classic oilfilled dummy load produced from 1961 through to 1983 when it was discontinued in favour of the hn31a. Heathkit assembly manual hn31 cantenna dummy rf load 1962. It extends in a narrow, 30 degree beam, to and from your target base station or access point. The author provides a brief description of heathkit s origins but does not dwell too long on this subject that has been well documented by others. However, in the vhf and uiif frequency ranges, per. Both of these dummy loads provided a heavy noninductive 50ohm resistor that was suspended in a 1gallon paint can type receptacle filled with transformer oil and a coax socket on the top lid.

I am interested in building one of theese and wondered if anyone has. There is little reason to go to the trouble of calculating the fluid needed for a 100w intermittent load. Anybody have the heathkit cantenna dmmmy load manual that i might get a copy. Heathkit hn31 cantenna watt dummy load without oil sold at wood county parkersburg hamfest this dummy load is from the estate of john andy andracki, kb8er sk. The manual for my johnson viking ii recommends using a light bulb for a dummy load and i would. At high frequencies, these loads perform well and exhibit tolerable vswr. List your items fast and easy and manage your active items x i will mail via usps 1st class mail in a large format. A bit of info the cantenna and other similar dummy loads are essentially a 50 ohm resistor that is nonreactive or noninductive and that can handle the power delivered to it. Up for sale is new replacement transformer load oil for bird, mfj, heathkit, cantenna dummy loadscoaxial resistors, terminators and attenautors. Heathkit assembly manual cantenna dummy rf load model hn31 unknown on. Original 1962 heathkit hn31 cantenna dummy rf load ham radio instruction manual. People said i was a ham all my life and in fall 2003 i became one.

Bird 43 heathkit cantenna mfj dummy load resistor replacement. Find great deals on ebay for cantenna and dummy load. Mid1959 found this author completing his first ham transmitter kit, a heathkit dx40. Heathkit hn31a cantenna rf load resistor dummy load.

Heathkit cantenna rf dummy load resistor model hn31 cb radio test equipment. I had removed the oil many years ago and as a result the container developed a lot of rust and corrosion. Most of the tuning will be into a dummy load, or with v9 removed as the manual instructs. Loving the hobby i wanted to really learn how things work and especially how to test and trouble shoot my own problems. Im building my own dummy load, consisting of resistors submerged in liquid paraffin or something similar, not 100% decided. Home page amateur radio museum equipment heathkit equipment.

Incidentally, the name cantenna was originally a joke. The mfj250 versaload kw wet dummy load lets you tune up fast. If you really want to go all out i saw a modified cantenna with a coolant recover tank on the side. I had some questions around heat dissipation and how i can calculate and. It is a ceramic tube coated with a carbon graphite film that yields a nominal resistance of 50 ohms.

Still a popular dummy load a staple in the shack of many hf operators is the dummy load, which allows tuning up a transmitter without interfering with signals on the air. One of these can handle continuous transmission at 200 watts, and up to ten minutes at one kilowatt. The dummy load comes complete with a derating curve. For heathkit cantenna antennarelated device, see dummy load. Cantenna hn31 amateurd heathkit brand, heath co benton harbor mi, build 19611983, 3 pictures, 1 schematics, united states of america, tubes. Chuck pensions book1 estimates that sales of the hn31 were in the order of 200,000 units between 1961 and.

A dummy load may appea r resistive or reactive to rf. As penson states, its hard to go to a flea market and not see. Heathkit cantenna dummy rf load model hn31 65952703 1965 original manual. The first operation was to modify the circuit shown in fig. Perhaps the inductive reactance of the bulb fooled the swr meter. I noticed he didnt have a dummy load so i gave him an old heathkit cantenna thats been sitting in my garage for years. Notes on the heathkit hn31 cantenna figure 2 hn31 interior construction the load resistor the performance of the dummy load has mostly to do with the resistor characteristics.

We offer fancooled, aircooled, and oilfilled dummy loads also known as dummy antennas from the most. I would also advise everyone to set the dummy load inside of another container. Back in the 70s, i bought a heathkit cantenna dummy load kit. The big dummy was very popular and was a good competitor to the heathkit cantenna, which had been sold as a kit for many years. Vintage heathkit manual rf signal generator model ig102. This article is part of wikiproject electronics, an attempt to provide a standard approach to writing articles about electronics on wikipedia. Heathkits classic oilfilled dummy load produced from 1961 through to 1983 when it was discontinued in favour of the hn31a.

Mar 27, 2011 i dont think the vent seal is critical but you can probably buy vent parts from mfj since they sell most parts for their products and their dummy load is very similar to the cantenna. My 40 yearold heathkit cantenna sprung a slow leak, and it did quite a bit of. Dec 30, 2006 i have one and before puttting any transmitter on the air i first run it into the dummy load to see if it behaves as id expect. The super cantenna is a directional, lineofsight antenna. Second hand heathkit hn31 cantenna dummy load, heathkit s classic oilfilled dummy load produced from 1961 through to 1983 when it was discontinued in favour of the hn31a. It can handle a full kilowatt for up to 910 minutes, depending upon the cooling oil used. Heathkit cantenna electronics forum circuits, projects. Heathkit assembly manual cantenna dummy rf load model hn31. Decades ago, a company called heathkit released a dummy load, which is basically a shielded power resistor, used to safely absorb the energy from a transmitter without actually transmitting. Chuck pensions book1 estimates that sales of the hn31 were in the order of.

They showed it taken apart but it had no oil in it. Heathkit hn31a cantenna rf load resistor dummy load radio. Mar, 2010 cantenna dummy load suitable up to 30 mhz and up to 1 kw the term cantenna originally referred to a product sold by heathkit co. What you were supposed to fill the can with was transformer oil.

Discussion in general technical questions and answers started by no2v, aug 12. Anybody have the heathkit cantenna dmmmy load manual that i might get a copy i would like to repair and check out. The book shows using s vtvm for get this relic, use a modern dmm with same spec. A dummy load is a device used to simulate an electrical load, usually for testing purposes. As penson states, its hard to go to a flea market and not see one cantenna. The manual for my johnson viking ii recommends using a light bulb for a dummy load and i would if i didnt have a heath cantenna on the bench.

We have dozens of these beauties that came from scientific radio that had been used around their plant. The dummy load has been used for many years and remains in apparent. Heath cantenna for uhf information on heathkit and others. I have one and before puttting any transmitter on the air i first run it into the dummy load to see if it behaves as id expect.

Cantenna hn31 amateurd heathkit brand, heath co benton h. Ok i was looking through my friend now your talking book today and noticed it showed a dummy load constructed of a paint can containing resistors. A bit of info the cantenna and other similar dummy loads are. Decades ago, a company called heathkit released a dummy load, which is basically a shielded power resistor, used to safely absorb the energy from a. A better heathkit cantenna improved metering circuit for an old standby update your dummy load. Test your transmitter the proper waywith a dummy load from dx engineering. The cantenna was well received by the ham community because of its low price and high performance. It extends in a narrow, 30 degree beam, to and from your target base. The cantenna was well received by the ham community because of its low. The lid of the can had the so239 conector and the board with the resitors.

Heathkit hn31 cantenna dummy rf load assembly manual ebay. Cantenna dummy rf load complete manual vintage radio info. Cantenna dummy load suitable up to 30 mhz and up to 1 kw the term cantenna originally referred to a product sold by heathkit co. Heathkit s classic oilfilled dummy load produced from 1961 through to 1983 when it was discontinued in favour of the hn31a. Dear the we aim to it ane of the best in the your heathkit warranty during 20 of parts which in and pay shipping to in world, a defective to other.

Optimizing the heathkit hw101, sb100102 transceivers, by mark graalman, wb8jkr, and len greenberg, wb8jcj. Hn31a for sale heathkit unbuilt hn31a model cantenna. Many old favorites, including the cantenna dummy load, appear in the book. We offer fancooled, aircooled, and oilfilled dummy loads also known as dummy antennas from the mosttrusted brands in ham radio, including ameritron, diamond, mfj enterprises, palstar, and vectronics. I will combined shipping for a discount if multiple items are wonturbo listerthe free listing tool. Jun 08, 2007 i was in the process of helping a friend setup his station. Trees, metal buildings, drywall, power lines, and other objects may block your wireless signal and make the super cantenna. A cantenna can be used as a satellite dish feed horn. Dec 24, 2015 you can learn a lot from a dummy load. If you would like to participate, you can choose to edit the article attached to this page, or visit the project page, where you can join the project and see a list of open tasks.

The wireless signal exits and enters the cap end of the super cantenna. This was a common way back in the days to load up a transmitter off air. I dont think the vent seal is critical but you can probably buy vent parts from mfj since they sell most parts for their products and their dummy load is very similar to the cantenna. The resulting setup is a lowcost highquality highgain antenna. Heathkit hn31a cantenna rf load resistor dummy load for radio cb. This makes me nostalgic for my dads heathkit hw101 and cantenna builds from the mid 1980s i think this is a fun series of articles.