Antique radio forums view topic heathkit qf1 q multiplier. The q multiplier functions as a very high q circuit coupled in parallel across the if transfor. Heathkit model pm 2 mobile tuning meter assembly manual. Heathkit gd1183 freezer failure alarm manual schematic. Operation manual heathkit oscilloscope, 1974 model trace mhz 15 io4510 dual dual io4510 15 operation model trace 1974 mhz heathkit manual oscilloscope.
Who on earth would want to put a qf1 next to a skyrider. Autek research qf1a active audio filter user manual. Many communications were done with cw or morse code. Again, given what was commercially available, builders did the best they could. Description, diagram and schematic pdf file icon 287 kb. 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.
It may not reflect the actual current prices or offerings that we have for sale. Sockets for connecting heathkit model qf 1 q multiplier on rear of chassis. 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. The heathkit qmultiplier qf1, when used with a communications receiver, provides additional selectivity or signal rejection as desired. The magic you could perform with the q multiplier puts crystal filters to. Heathkit gd18 electronic siren schematic heathkit gd1a grid dip meter. Connect the vc3 output posts to the vertical input of the oscilloscope. Dx100 transmitter sb221 linear amplifier part1 of 2. I have several heathkit items to sell, 2 sb series cabinets, for models sb100,101,102,300,400,301,401. The small unit measures 738 w x 41116 h x 4 1 8 deep, weighs 1 1 2 lbs. Oneowner heathkit ar3 and qmultiplier ohio university.
The heathkit q multiplier was sold as an addon upgrade superduper accessory for amateur ham communications receivers. 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. Most modern receivers have sufficient selectivity to make a q multiplier unnecessary. New listing heathkit qf1 q multiplier assembly manual. Visit us online for more information or to download service manuals today. Heathkit hd11 qmultiplier sch service manual download. This site helps you to save the earth from electronic waste.
In this video we look at the heathkit gd125 q multiplier. No explanation about what touchy meant, but it may be something to keep in mind. Jack najork, the builtin q multiplier, cq, december 1958. Heathkit model qf 1 q multiplier assembly manual 16. Heathkit qf1 q multiplier antique radio forums view topic. Q multiplier hd11 amateurd heathkit brand, heath co bent. 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. The venerable qmultiplier is one of those forgotten devices that seems to defy. Item was popular in the 1960s when most receivers used vacuum tubes. Connect the battery ground to the filter chassis ground.
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 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. Collectors prices literature schematics 1 schematic. Five tube transformeroperated general coverage communications receiver. Pictures schematics and other information on electronic kits like heathkit eico allied radio and others. Assembly and operation manual for heathkit io102 oscilloscope ca 1971 1974 topics. This site is for hams there want all the best from his radioamateur equipment. The claims are that it does work, but not as well as at 455kc, and it becomes very touchy. Heathkit schematic and manual archive vintage radio info. Schematics of antique radios category is a curation of web resources on, atwater kent home page, mauritron technical services. These manuals are available for download and free of charge. Mobile receiver 23 pages receiver heathkit heathkit hd3006 manual.
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. Now, look at the top of the paralleltuned tank circuit. Y y y hhhl o schematic of 0 multiplier of inttronithttonr the heathkit model qf1 q multiplier when used with a. Some receivers, including many of the general coverage heathkits had jacks on the back to allow easy connection of the q multiplier. Hallicrafters s120 and heathkit qf1 how to hook them up. 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.
There is a heathkit model qf1 q multiplier on ebay and that got me to wondering. The small unit measures 738 w x 41116 h x 418 deep, weighs 112 lbs. Heathkit s manuals were second to none in kit building. Modify your amateur radio to get better performance, or more functions. The q mult injection socket requires a standard phono plug and the nb socket. Cm1 direct reading capacity meter qf1 q multiplier. 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. Test equipment specs also see the matrix section heathkit magazine articles. Heathkit rc1 manual 3475 heathkit rc1 schematic 4504. Heathkit schematics also see the matrix sections heathkit block diagrams also see the matrix sections heathkit whereused. The heathkit qf1 was a sterling example of this device, which was generally paired with the ar3 receiver.
Heathkit diagrams, schematics and service manuals download for free. Heathkit q multiplier model hd11 for sale online ebay. 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. 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. Describe your experience with the autek research qf1a and tell us why you give it the rating you did required. 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.
Sep 11, 2000 condition and build a q multiplier from scratch. Dec 28, 2010 the heathkit q multiplier was sold as an addon upgrade superduper accessory for amateur ham communications receivers. This is a very late example of the famous qf1 but has some important advantages over that model. Q multiplier hd11 heathkit brand, heath co material. Q multiplier to operate on 150 ma and to interrupt the radios series heater string to power the q multiplier s heater. House bill 80l 39 aug94 tower safety tips 40 aug94 forward to the past. Q meter schematic, specifications and circuit description. 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. 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. The qf 1 audio filter is a 4 pole filter with peak, notch and lowpass functions. Heathkit model rd1 resistance decade kit assembly manual. Q multiplier qf 1 881 kb complete manual q meter qm 1 schematic, specifications 1. Heathkit operation manual model io4510 15 mhz dual trace oscilloscope, 1974 heathkit operation manual.
Heathkit model ps 4 regulated power supply assembly manual. Those two were meant to be together, dont separate them if you want actual. Connect the signal to be viewed to the input posts of the vc3. The heathkit model qf1 q multiplier when used with a communications receiver, provides ad. I am assuming you listen to cw as the q multiplier is not useful for phone except to perhaps reduce a heterodyne on ssb. 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. Eb5agvs boatanchors schematics page resource detail.
Q multiplier qf1 amateurd heathkit brand, heath co bento. Heathkit model eta3400 memory inputoutput accesory assembly manual schematic missing 32. The searchable catalog on our website is the official catalogue. I have available a heathkit gd125 q multiplier notch filter. 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. The q mult injection socket requires a standard phono plug and the nb socket requires a 9 pin socket plug which no one has. These are directly forward of the right transformer screw as viewed from the front of the unit. I thought id offer it here before it goes to the worlds largest auction site. The q multiplier on top draws its power from the ar3. 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. A heathkit qf1 q multiplier should serve well, since the kt200 he10 factory wired version both are designed for 455 khz ifs.
Heathkit qf1 qmultiplier sm service manual download. 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. 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. Receiver heathkit q multiplier assembly manual 25 pages receiver heathkit comanche mr1 assembly and operation manual. Original 1965 heathkit model gd125 q multiplier rare. The mfj1786 high q loop antenna for 10 to 30 62 aug94 it seems to us 9 aug94 epics from the epicenter 21 aug94 landmark legislation in new hampshire.
Heathkit ultimate operation repair service manuals. How to hook up a heathkit hd11 q multiplier radiobanter. Jul 08, 2014 in this video we look at the heathkit gd125 q multiplier. Stoner, citizens band q multiplier, popular electronics, march 1961. 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. There are other models with internal power supplies. 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. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. The principle is that increased feedback increases the circuits gain and selectivity, but also distortion. Heathkit model hw30 2meter transceiver the tower assembly manual 24. Heathkit gd1190 cointrack metal locator schematic heathkit gd1246 recharging light. Full text of heathkit qf1 qmultiplier internet archive. Dave, good point and heathkit provided two peaking ranges for the qf 1 to optimize either phoneor cw selectivity. Find great deals on ebay for q multiplier and heathkit q multiplier.
It may help to decouple the q multiplier power through a series resistor and another electrolytic cap. Free heathkit diagrams, schematics, service manuals. Heathkit pt 1 professional amfm stereo tuner manual i also have the following heathkit schematicsmanuals on cd. I am now accepting new manuals for inclusion in this archive. 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. 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. I never used a q multiplier but i bought this heathkit on ebay and want to. Listed under the antique radios schematics category that is about antique radios schematics. Original 1965 heathkit model gd125 q multiplier manual schematics rare. 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. Evidently the q multiplier is no longer needed due to modern receiver construction. When wiring the k4che plug do not use the pin numbers on the socket for wiring as it will be reversed. Its efficient, modern circuit uses 7 miniature tubes to provide better than 10.
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