Solid state 6au6 home of the collins radio association. You can refer to the manual when remounting the crystals in their respective. The 75s3b and 3c models are more in demand, but the straight old 75s3. I am replacing the old drop down menu, as i found it harder to navigate, click on the button adjacent the image of the radio to find previous ebay listings of it. After a ooops with the power cord on my 75s 1 i have repaired the receiver and removed some very bad work by others.
Collins 75s3c receiver for salethis 75s3c was owned by my nonsmoking father and was the rig he used for years. Mine is paired with a 32s3a transmitter and a 30l1 600w amp, connected to a 2 element quad antenna. April eliminate impulse noise with a new collins noise blanker. By replacing the inductor l16 in 75s3b with an 820 ohm resistor the distortion will decrease considerably because the clipping headroom at the plate improves. New collins center the beginning home of the collins. Cedar rapids ia, build 19611963, 6 pictures, 15 schematics, 12 tubes, united states of america, semiconductors.
When you put sline radio in upside down service position, the pto tube may hit the table top. Build your own low profile 6au67543 this is a fun project. Collins 75s3 75s3a receiver manual ham radio glendale. For use in the 32s1, 32s2, 32s3, 32s3a, 73s2, 75s3b, 3c radios etc. Type cr18u hc6u metal can crystals available for all popular collins ranges from 3. Improved cw operation of collins 75s 3 series receivers by glen e. In 75s3b the cathode of the triode v8a is connected to ground via inductor l16, in kwm2a an 820 ohm resistor is used instead. Collins 75a1 receiver service manual download, schematics. Zook, k9sth 20 with the collins 75s 3, 75s 3a, 75s 3b, and 75s 3c receivers, when a cw filter is installed 200 hz filter was included in every 75s 3 and 75s 3a when shipped from the collins factory, the frequency of the cw signal when centered in the.
The collins 516f2 power supply is used to power the collins 32s transmitters and the kwm2 transceiver. The collins 75s3b c receiverthe collins 75s3b is a versatile receiver with exceptionally sharp selectivity and operation in any of three modes ssb, cw and rtty. Installation, operation, principles of operation, service instructions, specifications, part list, illustrations. One disadvantage of the qsk system is that the 75s3x crystal oscillator should not be used to drive the 32s3 when using the receiver to monitor the transmitted signal. Some models may require the addition of an additional switching deck. The collins 75s3c was about the best amateur receiver money could buy back in time, and it seems to hold its value pretty well too in case you want to sell one day prices always going up. For sale is reprint of collins ham radio receiver 75s3 75s3a manual. Joe was running a collins 75s 3c receiver, 32s3a transmitter, one of the very rare collins 30s3 linears, and a 4element 20meter yagi at 60feet above ground. Collins 75s 3b hf ssb receiver in mint condition duration. All tubes have been tested and seem to be adequate. Be prepared and able to communicate in case of emergency with the largest selection at. This is s1b on your schematic and piggy backs to original crystal selection switch on 75s3c, 32s3a, and. Collins radio equipment manuals the cca is actively digitizing the usertechnical manuals for collins radios most popular equipment used for amateur radio purposes. In the video capture above, there are actually two completely separate rigs.
The collins 75s 3c is a versatile receiver with exceptionally sharp selectivity and operation in any of its four modes. Collins 75s3 75s3a receiver manual ham radio glendale manuals. I had previously used a behringer xenyx 802 mixer in this application, but after adding a new condenser microphone, external audio processor, and the collins sline and 75a4 to the shack, i needed additional input. Restoration of collins sline home of the collins radio association. Such documents include, but are not limited to, product manuals, schematics, test. I find the 75s 3 is as good as any for selection and receiving weak signals. The board for additional crystals is located on the top of the chassis and the standard group of amateur band crystals is mounted in a board on the underside. Way more information than you ever wanted on how to fell a tree. Picture below shows an excerpt of the 75s3b schematic diagram. Dec 03, 2004 i have used his ideas on 75s 3c s in the past20 and they work very well on the agc. Collins 75s332s3 repair guide cq communications store. Mivel ezeket nem tudom,a riaszto amikor felall rogton riaszt,es nem fogadja a mesterkodot727272 sem.
The only change i made was a slightly20 higher value resistor on r88 to set the agc slow speed to what i liked20 for my personal operations. I can hear the calibration signal but no signals from the antenna. Located in boc free classifed ads used surplus electronics. Manuals for collins this is the manuals page for collins. Collins 75s 332s 3 repairtuneup guide 4 hour dvd its like having an experienced professional right next to you. The second floor of this building will be the official headquarters of the collins radio association. Remember if you are restoring he 75s3a or c, there is a set of crystals under the. Improved cw operation of collins 75s3 series receivers by glen e. The beginning of the new collins radio center, located near johnstown, pa. Cedar rapids ia, build 19621963, 12 tubes, united states of america, pictures, schematics, semiconductors, amateur. The collins 75s 3a has 14 additional 200 khz positions and an additional knob above the band select switch. Mivel nem ismerem az eloeletet igy a regi kodok beszerzese lehetetlenne valt. I have a number of receivers and transceiverscollins s1, drake b and c, tr3, tr4, collins a3, kwm2, kenwood ts 830s, heathkit sb 310, yaesu ft897d.
The collins 75s3c is a versatile receiver with exceptionally sharp selectivity and operation in any of its four modes. Solid state 6bf5 home of the collins radio association. I find the 75s3 is as good as any for selection and receiving weak signals. Please give me a hand digging up information on a most unusual collins receiver, the r627urc8. The tunedcircuit lc ratio is thereby varied within appropriate limits for. The collins 75s3b is a versatile receiver with exceptionally sharp.
It is identical to the 75s3b except that an additional hf crystal board and front panel selector switch are included. Collins items capacitor replacement kits nationwide radio. It is identical to the 75s 3b except that an additional hf crystal board and front panel selector switch are included. Brand new stock that was squirreled away in a radio shop on radio row. This is s1b on your schematic and piggy backs to original crystal selection switch on 75s3c, 32s3a, and kwm2a. Installing inrad filters inrad has designed an adapter board to allow the use of the new series collins filters in the 75s3bc radios.
Collins 75s1, 32s1, and power supplyspeakerplus manuals. Designed to replace 75s series 6bf5 audio amplifier tube directly. Electrically the same as plugin model 526949800 f455fa60 except the y model needs to be soldered. Includes extra mars range crystals and original owners manual. One disadvantage of the qsk system is that the 75s 3x crystal oscillator should not be used to drive the 32s3 when using the receiver to monitor the transmitted signal. Collins 75s3b receiver original one sheet ad flyer. The notch filter rejection tuning really works wellbetter even than the drake c. May when you want the very best amateur ssb equipment. Collins 75a2 reciever schematic diagram bigschematics. Collins radio crystals for sale type hc6u for sline, kwm. Selling out my collins station, so no hamfests in texas now, so selling out.
In 75s 3b the cathode of the triode v8a is connected to ground via inductor l16, in kwm2a an 820 ohm resistor is used instead. Antique radio forums view topic collins 75s1 modifications. Select picture or schematic to display from thumbnails on the right and click for download. When listening to the 32s3 transmitted signal, a mixing product is generated in the 75s 3x that is fed. The 75s 3c receiver provides extended range coverage over the 75s 3b. Collins 75a4 new 26 piece capacitor replacement kit. I bought the core board with no enclosure customized for collins 75sx. Collins 32s1, 32s2, 32s3 new chassis mounted replacement capacitor can.
The 75s3c receiver provides extended range coverage over the 75s3b. Simple receiver not fancy, non smoker non contester. Click here to view color photo and more information or click here to view sold archive at universal radio. It incorporates the later improvements that were provided in the round emblem receivers, including t9, the filter cover on the top chassis and the cover on the bottom chassis. Our goal is to make these manuals available via online download and, eventually, via cdrom for all cca members. Even with the volume all the way down and muted i get a pretty good hiss coming from the speaker and ear phone jack. Oct 14, 2017 collins s line, collins 32s3 transmitter collins 75s3c collins 30l1 amplifier, collins 30s1 amplifier drake c line multi elmac af68 transmitter multi elmac pmr8 receiver senator barry goldwater, k3uig drake 5 line included a drake tr5 transceiver dual conversion receiver sideband engineering sbe33 national hro600 receiver nixie tube. The collins 75s 3b is similar but without 14 additional 200 khz positions and without the additional knob above the band select switch. Collins items capacitor replacement kits nationwide. For am reception the passband can be optimized by the installation of an optional 3. Rockwell collins rf tuning unit coil pn 54436002 51s1 75s3 sline kwm2 up for sale, rf tuning coil it could be used to repair any of the three circuits that uses it, ant rf and osc hard to find rockwell collins. When listening to the 32s3 transmitted signal, a mixing product is generated in the 75s3x that is fed. Theres no denying that the 6bf5 runs hot in those receivers.
Cedar rapids ia, build 19671975, 4 pictures, 7 schematics, 12 tubes, united states of america, semiconductors. I have a number of receivers and transceivers collins s1, drake b and c, tr3, tr4, collins a3, kwm2, kenwood ts 830s, heathkit sb 310, yaesu ft897d. In the am mode, the dfd2s, seeing no bfo signal, simply applies a 455 khz software bias. Improved cw operation of collins 75s3 series receivers. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. This collins 75s 3b receiver is a late winged emblem receiver, serial number 17xxx. The collins 75s 3c was about the best amateur receiver money could buy back in time, and it seems to hold its value pretty well too in case you want to sell one day prices always going up.
Qso today interview with jim garland, w8zr qso today amateur. After a ooops with the power cord on my 75s1 i have repaired the receiver and removed some very bad work by others. Hi, i am tony i0jx connecting a dfd2s digital display to a collins. Dealer list june collins 30s1 linear amplifier gives you maximum power.
Collins radio crystals for sale type hc6u for sline. Zook, k9sth 20 with the collins 75s3, 75s3a, 75s3b, and 75s3c receivers, when a cw filter is installed 200 hz filter was included in every 75s3 and 75s3a when shipped from the collins factory, the frequency of the cw signal when centered in the. The tube manual specifications, recommendations and curves indicated a. Schematics for 75s3b and later 75s3 receivers show this resistor as r87. The audio control system at w3yy is built around a very highquality, but moderate priced audio mixer, the soundcraft epm8. Am reception is provided, and the passband can be optimized by the installation of an optional 3. July 2001 anticipated official opening of the 30 x 50 cra should be this fall. This warning is per a collins service information letter. The rear panel has the antenna jack and other io jacks. Qso today interview with jim garland, w8zr qso today. Rockwell collins was a multinational corporation company headquartered in cedar rapids. We could point the yagis right at each other and still be able to work dx during. The set is composed of several modules for easy field repaira bad module.
I was running the 75s 3a, 32s3, tempo2001, and a 3element 20meter yagi at 55feet above ground. Collins 75s1, 32s1, and power supplyspeaker plus manuals discussion in cb radio gear ebay auctions ending soon started by ebay, apr 19, 2017. Collins 75s 3c receiver for salethis 75s 3c was owned by my nonsmoking father and was the rig he used for years. The collins 75s3c is a high quality amateur band receiver featuring am, cw, lsb and usb modes.
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