I need a repair manual with test information such as tube socket voltages and a schematic with. A nice thing about this receiver is the smooth main tuning dial and about eleven inches of bandspread, different from so many other receivers of its day. For no population most use np, nopop, delete, or other note. The receiver was the first to include nationals new selectoject circuit as built in rather than an accessory. In any event the nc100asd schematic on bama only differs in terms of 6c8s and 6f8s. The nazional nc121 receiver is designed to match an unbalanced low impedance antenna transmission line. Before i ask a few questions, i would like to let you guys know i have no clue what i am doing. You can shift, rotate, color, decompose, and view in 2. Purchased new in 1958, hes told me a couple of times how proud he was of it. Aug 31, 2014 receptor national nc 125 a ser restaurado.
National nc140 and nc173t national nc188 and nc190. Back to main navy radio page 1950s60s equipment and operations. Paragraphs in standard type concern operating instructions only, those in italics describe the circuits. The soj feature reminds me of a graphic equalizer control as you can tune and either boost or reject the audio frequency response to pick out the audio signal you want emphasized. The national nc 125 is a general coverage single conversion 8 tube broadcast and hf receiver. And thats only one of the many fine features that make the nc125 tops in receiver. Manual is 23 pages long and includes enlarged 11x17 foldout of circuit diagram. W4op vintage radio restoration national ncx5 transceiver. It has far fewer bells and whistles than my nc173, but it does include a builtin speaker. I just found the manual and schematics on bama and ordered a new set of tubes. One similar to the ones i have for my bc348 r and bendix ra1b that has pictorial drawings of component placement and. A no connect is used to indicate the schematic pin is correctly designed for no connection. The rear panel has antenna and speaker connections.
National nc60, national nc88, national nc98, national. National nc125 general coverage receiver 500kc35mc tube type vintage 19501956 cw am includes selectoject w ext speaker. Manual includes wiring diagrams, illustrations and part location charts. Appears the 6c8 in the nc100asd is wired as two diodes, so any old dual triode with the same pinout would work identically there. National nc125 receiver service manual download, schematics. Contact and submission information below updates 20190623. Much of the assembly was done on lines used for military products when times were slow and the 125 was in production during the korean war. I am now accepting new manuals for inclusion in this archive. This radio was manufactured from 1950 through 1956. The nazional nc 121 receiver is designed to match an unbalanced low impedance antenna transmission line.
The radio is designed for reception of amplitude modulated voice or music and code telegraph signals. These manuals are available for download and free of charge. Discontinued shortwave receivers display the national nc125 general coverage receiver tunes from 550 to 36000 khz in four ranges. Hayseed hamfest manufactures brand new multisection can capacitors and recap kits for the national nc 125. It has far fewer bells and whistles than my nc 173, but it does include a builtin speaker. The receiver was the first to include national s new selectoject circuit as built in rather than an accessory. I understand my quiet location is stellar for receive performance, but the nc303 plays a part. Please send email if you have any photos, additional info, etc. Others nearby reported some signals could not be copied. The radio was part of the linear integrated circuit design departments test equipment. I believe this national nc303 is the best am receiver for tough band conditions. For the actual text, please consult the schematic above. The nc125 receiver is designed for operation form a 105 volt, 5060 cps. View online or download national nc 100 instruction manual.
Use this interactive tool to create dynamic drawings on isometric dot paper. National selectoject builtin rejects any selected audio frequency 45 db. Modern shortwave receiver survey table of contents. It was relatively clean and not much effort appeared to be needed to return it to good operational condition. Vintage national nc88 tube shortwave receiver ham radio post war demo duration. National nc100 manuals manuals and user guides for national nc100. I recently obtained a national radio nc300 to add to my collection of vacuum tube receivers. Dec 10, 2015 finally completed the restoration of my national nc 98 receiver and its nc 98ts matching speaker. Dubbed the receiver for the man who wants everything, the device reportedly offers such options as diversity modification kit, crystalcontrolled fixed channels, plugin crystal calibrator, plugin mechanical filter, and crystalcontrolled b.
Oct 27, 2006 i am restoring a national nc120 receiver. The blue knobs are obviously not original, but they do really stand out. National nc270 receiver service manual download, schematics. Normal power consumption is approximately 91 watts. This nc156 from wwii was a specialty model made for the navy and coast guard. This site helps you to save the earth from electronic waste. I need a repair manual with test information such as tube socket voltages and a schematic with component values. This is the little brother to the big nc 173183 machines, at least in styling. This is the little brother to the big nc173183 machines, at least in styling. I would like to obtain a copy of the schematics and user manual for. The nc125 uses the builtin selectoject in lieu of an if xtal selectivity stage. There was a great fear that the enemy could monitor the local oscillator in unshielded receivers to home in on a convoy for a torpedo attack, so national designed a nonradiating unit for ships. I am 29 years old, so this equipment is around my parents age and its the first time seeing a tube in real life. National nc60, national nc88, national nc98, national nc.
Ill have to check my notes, but i believe it was drawing about 2223ma, and that was with. I understand this type was used by the us navy during world war 2. On the air was an old time radio program from the golden years of radio 30s50s on wwcr shortwave station. In any case the nc105 and nc121 are basically circuit twins. I would like to obtain a copy of the schematics and user manual for the national radio model nc173. I have a national nc100a receiver that appears in real nice shape but needs the usual recap and cleanup. National nc125 nc125 radio receiver manual glendale manuals.
We have 1 national nc100 manual available for free pdf download. National nc100 instruction manual 17 pages national nc100 receiver instruction manual. View and download national nc 100 instruction manual online. I will be happy to cover all photocopy and shipping cost.
Today, national geographic maps continues this mission by creating the worlds best wall maps, outdoor recreation maps, travel maps, atlases and globes. This is on of the nc100s that lacks the 5401600 broadcast band in favor of a low frequency band. If you want to see manuals from other manufactories you. Hf receiver national nc125 for salei am selling this receiver for ann tucker the widow of bob tucker w4rfk. This nc 156 from wwii was a specialty model made for the navy and coast guard. Heres a total station transceiver for the 80 through 10 meter bands which gives you more features and performance than any other transceiver at any price.
Troubleshooting section has tube socket voltage table, useful when troubleshooting. The drawing of the accessory connector socket on the schematic diagram. Go to ww free classifed ads used surplus electronics. Founded in 1915 as the map department of the national geographic society, national geographic maps is responsible for illustrating the world around us through the art and science of mapmaking. These receivers were built from 1950 1955 and this one has its matching speaker. Discontinued shortwave receivers display the national nc 125 general coverage receiver tunes from 550 to 36000 khz in four ranges.
So i end up with a national nc125, eico transmitter, and over a handful of. The nc 125 uses the builtin selectoject in lieu of an if xtal selectivity stage. Over the past few days i completed the replacement of all the old capacitors, did another complete ifrf alignment. I note that national was real proud of the nc 125 assembly and even showed an under chassis view in qst ads. I understand my quiet location is stellar for receive performance, but the nc 303 plays a part. Visit us online for more information or to download owners manuals today. Many of these photos are of equipment that was for sale on ebay.
The national nc125 is a general coverage single conversion 8 tube broadcast and hf receiver. Hayseed hamfest manufactures brand new multisection can capacitors and recap kits for the national nc125. The national nc400 receiver ebsco information services. Trying out nationals nc125 selectoject system national. The nc 125 receiver is designed for operation form a 105 volt, 5060 cps. I just learned 4311 that the speaker in this image is actually an nc300ts which goes with the nc300 receiver. I believe this national nc 303 is the best am receiver for tough band conditions. I note that national was real proud of the nc125 assembly and even showed an under chassis view in qst ads. The radio has 11 tubes and continuous frequency coverage from 560 kc to 35 mc.
For sale is reprint of national nc125 radio receiver manual. Both the nc57 and nc125 are from the same octal tube generation. So i end up with a national nc125, eico transmitter, and over a handful of heath test equipment. View and download national nc100 instruction manual online. It has a black cabinet and a gray chassis, with orange army signal corps markings on the back and on the chassis surface. It uses pretty much standard textbook circuits except for the selectoject filter which is effective in sharpening up the audio response or reducing heterodynes. Dubbed the receiver for the man who wants everything, the device reportedly offers such options as diversity modification kit, crystalcontrolled fixed channels, plugin crystal calibrator, plugin. Vintage radio restoration by w4op national ncx5 transceiver. The earliest national advertisment ive seen is in the november 1948 issue of qst, though i did see a dealers ad from earlier in the year left. Permanent magnet dynamic pdyn loudspeaker moving coil o 5 inch 12. This was before national radio company split off from national company.
After fighting with a national hro500 for some time i took a brief break from national stuff. Service manuals, schematics, eproms for electrical technicians. Powers up, seems to e in good working order, the speaker works well but the connecting wire between radio and speaker is pretty crusty and the ends of the wire need to be repaired, sold asis i am not an expert and dont know the ins and outs of the ham radio 222515103309. A friend of mine used to work for our citys recycling program. Finally completed the restoration of my national nc98 receiver and its nc98ts matching speaker.