The q mult injection socket requires a standard phono plug and the nb socket requires a 9 pin socket plug which no one has. Mar 31, 2018 heathkit qf 1 for all intents and purposes while regeneration was the first form of q filtering, it was the if q multiplier that gained strategic use by traffic handlers and contesters a form of traffic handling. Free heathkit diagrams, schematics, service manuals. Q meter schematic, specifications and circuit description.
In this video we look at the heathkit gd125 q multiplier. Y y y hhhl o schematic of 0 multiplier of inttronithttonr the heathkit model qf1 q multiplier when used with a. Connect the battery ground to the filter chassis ground. That qf1 was what let me use my s20r as a communications receiver that was the best thing that ever happened to that receiver the magic you could perform with the q multiplier puts crystal filters to shame. New listing heathkit qf1 q multiplier assembly manual.
The qf 1 audio filter is a 4 pole filter with peak, notch and lowpass functions. Pictures schematics and other information on electronic kits like heathkit eico allied radio and others. Heathkit gd18 electronic siren schematic heathkit gd1a grid dip meter. Cant answer your question, pete, but i recall reading where some have taken the heathkit qf 1 q multiplier and modified it to work at 915kc to use with the bc348 receiver. I never used a q multiplier but i bought this heathkit on ebay and want to. Collectors prices literature schematics 1 schematic. Most modern receivers have sufficient selectivity to make a q multiplier unnecessary.
The heathkit qf1 was a sterling example of this device, which was generally paired with the ar3 receiver. Sockets for connecting heathkit model qf 1 q multiplier on rear of chassis. Heathkit hd11 qmultiplier sch service manual download. Test equipment specs also see the matrix section heathkit magazine articles. Evidently the q multiplier is no longer needed due to modern receiver construction. The q multiplier functions as a very high q circuit coupled in parallel across the if transfor. The magic you could perform with the q multiplier puts crystal filters to.
The heathkit q multiplier was first introduced in late 1955 as a way to improve the selectivity of many receivers of the day especially on the heathkit ar3. Heathkit s manuals were second to none in kit building. This is a very late example of the famous qf1 but has some important advantages over that model. It may help to decouple the q multiplier power through a series resistor and another electrolytic cap. Five tube transformeroperated general coverage communications receiver.
Kwm2a qf1 ops using the heathkit qf1 with the kwm2 the kwm2 has a built in injection jack and you can use the noise blanker socket for power. Heathkit ca1 conelrad alarm schematic heathkit dx100 transmitter schematic heathkit hm11 swr meter schematic heathkit hp20 utility power supply schematic heathkit mr1 comanche receiver schematic heathkit qf1 q multiplier schematic heathkit sb10 ssb converter schematic heathkit sb200 linear amplifier schematic page 1, page 2 heathkit. Q multiplier hd11 amateurd heathkit brand, heath co bent. That first heathkit quickly led to building the matching qf 1 q multiplier followed by an sg8 signal generator both of which worked perfectly when completed.
Those two were meant to be together, dont separate them if you want actual. The small unit measures 738 w x 41116 h x 4 1 8 deep, weighs 1 1 2 lbs. Now, look at the top of the paralleltuned tank circuit. Its efficient, modern circuit uses 7 miniature tubes to provide better than 10. Some receivers, including many of the general coverage heathkits had jacks on the back to allow easy connection of the q multiplier. Autek research qf1a active audio filter user manual. Visit us online for more information or to download service manuals today. Many communications were done with cw or morse code. Listed under the antique radios schematics category that is about antique radios schematics.
House bill 80l 39 aug94 tower safety tips 40 aug94 forward to the past. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Assembly and operation manual for heathkit io102 oscilloscope ca 1971 1974 topics. The claims are that it does work, but not as well as at 455kc, and it becomes very touchy. I thought id offer it here before it goes to the worlds largest auction site. The q mult injection socket requires a standard phono plug and the nb socket. Jack najork, the builtin q multiplier, cq, december 1958. Description, diagram and schematic pdf file icon 287 kb. Mobile receiver 23 pages receiver heathkit heathkit hd3006 manual. Heathkit model qf1 q multiplier assembly manual 16. Operation manual heathkit oscilloscope, 1974 model trace mhz 15 io4510 dual dual io4510 15 operation model trace 1974 mhz heathkit manual oscilloscope. Heathkit ultimate operation repair service manuals.
Heathkit model eta3400 memory inputoutput accesory assembly manual schematic missing 32. Schematics of antique radios category is a curation of web resources on, atwater kent home page, mauritron technical services. This site helps you to save the earth from electronic waste. The q multiplier on top draws its power from the ar3. Modify your amateur radio to get better performance, or more functions. Describe your experience with the autek research qf1a and tell us why you give it the rating you did required. Pt 1 amfm stereo tuner pt15 photo timer qf 1 q multiplier qm 1 q meter 11 sep 2006 heathkit pt 1 am fm tuner schematic was added to the repair manual directory mon sep 11 2006 by admin. Heathkit qf1 q multiplier antique radio forums view topic. Stoner, citizens band q multiplier, popular electronics, march 1961. Original 1965 heathkit model gd125 q multiplier manual schematics rare. The hd11 is the same as the qf1 except that it has a built in power supply rather than robbing the power from the receiver. Dx100 transmitter sb221 linear amplifier part1 of 2.
Original 1965 heathkit model gd125 q multiplier rare. Connect the signal to be viewed to the input posts of the vc3. If you ever get the chance, look inside a heathkit qf 1 q multiplier or its descendants, and see the whopping inductor they had made for it. Heathkit gd1183 freezer failure alarm manual schematic. Heathkit model qf 1 q multiplier assembly manual 16. Q multiplier to operate on 150 ma and to interrupt the radios series heater string to power the q multiplier s heater. I know what q is regarding inductors and capacitors quality factor, reactance divided by resistance but i dont know exactly what a q multiplier does or how it connects i assume it connects to a receiver but am not even sure about that. Hallicrafters s120 and heathkit qf1 how to hook them up.
Heathkit diagrams, schematics and service manuals download for free. Heathkit schematics also see the matrix sections heathkit block diagrams also see the matrix sections heathkit whereused. Heathkit q multiplier model hd11 for sale online ebay. Again, given what was commercially available, builders did the best they could. The hd11 is the same as the qf 1 except that it has a built in power supply rather than robbing the power from the receiver. Antique radio forums view topic heathkit qf1 q multiplier. Connect the vc3 output posts to the vertical input of the oscilloscope. No explanation about what touchy meant, but it may be something to keep in mind. If you have some stuff that not is listed here you can donate this by contact mods. Receiver heathkit q multiplier assembly manual 25 pages receiver heathkit comanche mr1 assembly and operation manual. Heathkit model pm 2 mobile tuning meter assembly manual. Heathkit qf1 qmultiplier sm service manual download.
Jul 08, 2014 in this video we look at the heathkit gd125 q multiplier. The need to change the heater filament voltage, in the qf 1, for use with the ar3, as well as directions on how to accomplish this, are on page 11 of the qf 1 manual. Cm1 direct reading capacity meter qf1 q multiplier. Heathkit gd1190 cointrack metal locator schematic heathkit gd1246 recharging light. Find great deals on ebay for q multiplier and heathkit q multiplier.
Sep 11, 2000 condition and build a q multiplier from scratch. These manuals are available for download and free of charge. Dec 28, 2010 the heathkit q multiplier was sold as an addon upgrade superduper accessory for amateur ham communications receivers. The venerable qmultiplier is one of those forgotten devices that seems to defy. Service manuals, schematics, eproms for electrical technicians. I am assuming you listen to cw as the q multiplier is not useful for phone except to perhaps reduce a heterodyne on ssb. Who on earth would want to put a qf1 next to a skyrider. The small unit measures 738 w x 41116 h x 418 deep, weighs 112 lbs. Q multiplier qf 1 881 kb complete manual q meter qm 1 schematic, specifications 1.
Feb 28, 2010 getting a couple of thousand ohms of reactance at 2000 khz is a lot easier than at 455 khz, where youd need 700 uh. This site is for hams there want all the best from his radioamateur equipment. Also, there is a very handy modification, to the qf 1, that requires no additional parts, that converts the broad position to a variable bandpass function. Red schematic of q multiplier ofi introduction the heathkit model qf1 q multiplier when used with a communications receiver, provides ad ditional selectivity or signal rejection as desired. Q multiplier hd11 heathkit brand, heath co material. The heathkit q multiplier was sold as an addon upgrade superduper accessory for amateur ham communications receivers.
Heathkit schematic and manual archive vintage radio info. The searchable catalog on our website is the official catalogue. There is a heathkit model qf1 q multiplier on ebay and that got me to wondering. There are other models with internal power supplies. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. Heathkit operation manual model io4510 15 mhz dual trace oscilloscope, 1974 heathkit operation manual.
Heathkit model ps 4 regulated power supply assembly manual. They were also around in abundance as addons in the form of kits in the 50s and 60s, most notably the heathkit qf1 and its descendants. I have several heathkit items to sell, 2 sb series cabinets, for models sb100,101,102,300,400,301,401. The heathkit qmultiplier qf1, when used with a communications receiver, provides additional selectivity or signal rejection as desired. The heathkit model qf1 q multiplier when used with a communications receiver, provides ad. This catalogue is produced for the convenience of our customers who may not have internet access on a regular basis or who wish to have a printed listing of our manuals. It may not reflect the actual current prices or offerings that we have for sale. Oneowner heathkit ar3 and qmultiplier ohio university. Full text of heathkit qf1 qmultiplier internet archive. I am now accepting new manuals for inclusion in this archive. The q multiplier is grandpas dsp and it will pep up any entry level shortwave or novice grade receiver and make it more sensitive and selective. Heathkit pt 1 professional amfm stereo tuner manual i also have the following heathkit schematicsmanuals on cd.
How to hook up a heathkit hd11 q multiplier radiobanter. Find heathkit hd11 rigs and spare parts on ebay find the heathkit hd11 on amazon a q multiplier is grandpas dsp and it will pep up any entry level shortwave or novice grade receiver and make it more sensitive and selective. Item was popular in the 1960s when most receivers used vacuum tubes. Heathkit pt15 schematic 2 3760 heathkit qf1 qmultiplier manual 3947 heathkit qf1 manual 33 heathkit qm1 manual 3211 heathkit r110 construction manual 3672 heathkit ra1 block diagram 3058 heathkit ra1 receiver rsgb bulletin 196306. I have available a heathkit gd125 q multiplier notch filter. Because the peak or null effect of the q mul tiplier may be tuned across the receivers if bandpass, its operation is more flexible than that of a crystal. Heathkit model rd1 resistance decade kit assembly manual. Eb5agvs boatanchors schematics page resource detail. When wiring the k4che plug do not use the pin numbers on the socket for wiring as it will be reversed. Dave, good point and heathkit provided two peaking ranges for the qf1 to optimize either phoneor cw selectivity. Kwm2a qf 1 ops using the heathkit qf 1 with the kwm2 the kwm2 has a built in injection jack and you can use the noise blanker socket for power.
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