I quickly discovered why changing them was so common. Inc new york, ny, build 19391945, 4 pictures, 6 schematics, 11 tubes, united states of america. When i got the receiver several months ago i needed to wiggle the bandswitch knob to get this band to work. I have gotten back a knight t60 that i had as a novice transmitter and wish i had an hq129x to sit beside it to have my novice station back. I read that my hq129x has three if stages and it compared it to another with only two if stages it said that it had two more tuned circuits. I traded my hq170 for it originally for nostalgias sake, with an eye on am performance. All the other bands worked without any wiggling of the. Details about hammarlund hq129x receiver ham radio untested. This is a very nice combbound reprint of the 20 page operators manual for the hq129x receiver. Hyster electric lift truck n30xmxdr3, n45xmxr3 b264 parts manual download.
Describe your experience with the hammarlund hq120x and tell us why you give it the rating you did required. Useful data on tvtesters, collins, drake, hammarlund, hallicrafters, national, heathkit, ef johnson. View and download hammarlund hq100 service manual online. I really liked the performance of the hammarlund hq129x. Hammarlund hq129x professional receiver sch service. I have two hq 129x receivers and i bought a set of original knobs for one. The hq129x is a solid welldesigned radio that purposely splits the bands, including the am broadcast band, so that the amateur radio sections of the shortwave bands will be favored. Hammarlund hq129x front panel and bezel ham radio shortwave receiver. Am using a verified precise and calibrated frequency generator keypad digital entry. Qsc diagrams, schematics and service manuals download for free. If you look at the schematic you see the agc dc voltage heading north thru a 2. In 1945, when the hq129x was sold on the postwar market. The front panel of the hq129x pictured below is the older twocolor style.
No mercury vapor, just a mixture of gases such as neon and argon. The hq129x only covers down to 540khz so im not sure how you can figure out when youve hit the resonant frequency. It is the 1946 red letter edition, wholly stock with original knobs. Buy, sell, trade hf and vhf equipment, towers, antennas, rotators and more. I have owned my hammarlund hq129x now for about two years. Early in the winter of 2000 i finally fired up an old hammarlund hq129x 11tube receiver that works really nicely for am bcb because its got pretty good selectivity, great sound quality requires external speaker and its dial is calibrated every 10 khz in the am bcb so its easier to identify. When you slowly sweep around 455 khz by varying the frequency of the signal generator, there will be a large but very narrow peak in the audio at the. If you want to join us and get repairing help please sign in or sign up by completing a simple electrical test. Foreign orders are welcome thanks to the ebay global shipping program, but your. In addition to the operating instructions, this book contains complete alignment instructions, parts list, a very handy voltage chart giving the proper voltage to ground for each pin of all the tubes, plus a nice big 11x17 foldout schematic.
I just recently got a hammarlund hq129x at an estate sale, and im almost done recapping it. For sale is reprint of hammarlund hq129x communications receiver manual. I read that my hq129x has three if stages and it compared it to another with only two if stages it said that it. I was never really impressed with the hq170 as an am receiver, although it was great for ssb and not too bad on cw. The worldwidedx radio forum was originally established in 2001. Later model hq100a is similar to the hq100, but with a separate bfo builtin bfo knob is between the tuning dials, and the optional clock is in the 24 hour format. Ive had two of these models over the years and truly enjoyed using them for amateur radio and shortwave listening. Free returns are available for the shipping address you chose. After looking at the schematics and determining there is current on the relay output on the back of the receiver. I have an hq170 and would not recommend this mod for them because it accomplishes nothing.
The manual sendreceive switching of the receiver has become quite tiring since the dow key is being switched with the transmitter. Worldtime on amfone home about amfone ampx am audio vault. I built the tube version and connected it to an hq129x similar to the one above. The 0c3 regulator used in the hq129x is a coldcathode gas glow vr tube. My question has to do with updating the ac cord to a 3 wire grounded one. Ive got the user manual which includes a schematic. You can return the item for any reason in new and unused condition and get a full refund. Frankly, the hq129x is about average for receivers of that vintage where weight is concerned. There are louvers on both sides that give some support for handling but no handles or cutouts.
While the radio worked this way, the wiring was poorly executed and unreliable. I have gotten back a knight t60 that i had as a novice transmitter and wish i had an hq 129x to sit beside it to have my novice station back. The detector, noise limiter, and audio preamplifier were wired along the lines of the hq129x for some reason, different tubes and all. Most units had all the front panel labeling in white. While it was designed for both am and cw ssb use, tuning in either cw or ssb signals can be frustrating. I do have an hq 150 to repair and restore, but somehow, it just isnt the same. Hayseed hamfest manufactures brand new multisection can capacitors and recap kits for the hammarlund hq129x.
The biggest and best ham radio classifieds on the web. They are good receivers in their own way but cannot provide the audio quality that the 100, 110, 145, and 160 can because the low ifs are too restrictive. We collect prices paid by real hams over the years to help you estimate the value of a used hammarlund hq129x. Model hq145xc has fixed crystal position and the clock. Com ham radio classified ads swap amateur radio hf. Hammarlund hq129x hq129x communications receiver manual. The hammarlund hq129x is often found with larger, usersupplied, tuning knobs. In spite of living within sight of nearly every new york am transmitter wabcs tower was close that we could hear its audio in our kitchen toaster, i logged more than 800 am stations on my 40svintage hammarlund hq129x receiver, which is still in storage at my sisters place.
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. About us the worldwidedx radio forum was originally established in 2001. Antique radio forums view topic hq129x restoration. A correction to a mistake in hammarlunds alignment procedure. Hammarlund hq129x receiver ham radio untested ebay. I am now accepting new manuals for inclusion in this archive. The additional selectivity provided by these two receivers has a trade off and that is audio quality.
A special tuning cap assembly was designed specifically for the receiver featuring 6 tuning cap sections and 9 bandspread cap sections. The band then worked fine, especially my frequency of interest around 7. Inc new york, ny, build 19381944, 3 pictures, 11 tubes, united states of america, schematics, semiconductors. Need hq129x bandswitch help hammarlund radiobanter. This receiver is a great medium wave performer and a ton of fun to operate. Schematics of antique radios category is a curation of web resources on, atwater kent home page, mauritron technical services. I had a hammarlund hq 129x as my novice receiver back in the 60s. Hammarlund hq 129x crystal calibrator kit installation. The rectifier is a 5u4g, which is a high vacuum type. A good schematic and alignment service manual is a must. Oct 8, 20 i really liked the performance of the hammarlund hq129x.
An earlier panel style had the hammarlund name and the hq129x model number in redorange with all other front panel marking in white. Let us know what you traded it for and help other ham operators. Hammarlund hq129x ohio university faculty and staff websites. The line running up from r48 is connected to the top instead of the bottom of the s4 switch. The manual i have for the 145 states that the sweep generator and an oscope are ideal for alignment, but lacking those a vtvm and a signal generator will work as well if not as well as. Note that all of the front panel markings on this hq129x, like the one shown above, are in white. We pride ourselves on welcoming radio hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. This circuit was originally in qst using a twin triode and a dual diode vacuum tube.
Hammarlund ultimate ham radio operation repair service. Hammarlundroberts, how to build the fivetube receiver 1925. Since you are injecting the if frequency, the dial position doesnt matter. Brands book lists the hq129x at 52pounds and the manual does not give any weight. Based on historic data, todays secondhand price of the hammarlund hq129x is around. Of the four radios, the hammarlund was easily the most interesting to work on. The hammarlund hq120x general coverage receiver tunes medium wave and shortwave in six bands. Hammarlund hq129x hq129x communications receiver manual quantity.
I have the service manual and am following directions. Everything you need to know about the hammarlund hq140x receiver and more in one video. Heathkit bc1a am tuner page 4 the radioboard forums. Receiver hammarlund hq110a instruction and service information. Winter of 2000 i finally fired up an old hammarlund hq129x 11tube receiver.
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