eddystone 680x receiver manual
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eddystone 680x receiver manualTell us something about it! We collect prices paid by real hams over the years to help you estimate the value of a used Eddystone 680X. Just bought or sold this model. Let us know what you traded it for and help other ham operators! If you have any questions or suggestions, or if you'd like to participate, please get in touch. The broadcast bands are marked on the dial. The vernier tuning scale is a mechanical bandspread scheme that provides a quick and accurate means to return to a previously logged frequency. The tuning indicator (DM70) is a green fluorescent tube. With no signal the glow will extend to its full length. When a signal is received the glow contracts.The original 670 had the medium wave scale marked in meters.Two RF stagesIt also adds a crystal filter and product detector. Ranges:.48-1.12, 1.11-2.5, 2.5-5.7, 5.3-. S-Meter tuning indicator, Noise limiter, Crystal filter. Successor of 680 featuring a broad linear analog dial, the crystal filter is included in 680 as in 680X models, in this case, the X-suffix does not stand for crystal filter. Alternative tube layouts: 6BR7 can be substituted by 8D5, 8D3 instead of 6AM6, EL91 or 7D9 instead of 6AM5. Matching 812 mounting feet, 811 diecast speaker, 688 black speaker. In French: TSF for Telegraphie sans fil. Power Supply: - Single-phase AC. Consumption:- 90Advance design, rugged construction and highIn addition toRange 1: - 114 toPower Supply: -. Consumption: - 90The construction and workmanshipThe 680X operated from standard AC mains. Frequency. Range 1: - 30 toThe BFO had a. Power Supply: -. Consumption: - 80This unit weighs 47 lbs - 21.3 kg. No outer cover. I did not power it up, as the rectifier tubes were notin it. All other tubes are there. No smell or mess that would suggest there is an ythingwrong with the tr an sformers.Thank you, for helping us keep this platform clean. The editors will have a look at it as soon as possible.http://ailemsin.com/Upload/cutler-hammer-s811-soft-start-manual.xml
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In my collection, a few of the later ones, from the 1950s, are still operational, notably the Eddystone 680X and the Collins 51J-4 and 75S-1. Tremendous changes evolved over this period,The first stage is a regenerative detector, followed by an audioThe front panel isI was given the receiver while working in the USA in the late 1990s.I recently found some reasonable replicas of the original 'tubes' (valves)The 'tubes' are actually 'Edison style' LED garden lightsThey look remarkably realistic !The first two stages are virtually the same, a regenerative detector, followed by a transformer coupled headphone amplifier.The receiver is mounted in a sturdy french polished wooden box, about 200 x 165 x 120 mm. The front panel isI was given the receiver in 2017 by a friend, Doug Lux WB6VAC. It came with the original manual and CAMCO 'Cannon-ball Junior' headphones.I have yet to find out if it works. The radio operates from 22.5 V (detector) 45 V (audio stage), 1.5 V filaments and a separate 1.5 V bias battery. The power lead looks new, and is braided with individual metal identification tags on each lead. The leads end in automotive bullet connectors.The 'Station Selector' tunes in the stations, using another variometerThe knob top left adjusts the filament current (large rheostat), and acts as the On-Off switch.There are threeIn the picture below, the one at the top left is. It is in reasonably original condition, and still operational. It stillAs well as operating as a heterodyne wave meter (there was a 1 MHz reference crystal and a calibrated VFO), the. LM-10 could AM modulate its oscillator at 400 Hz for use with AM receivers. The calibration books were individually calibrated and printed.It has lost theThese units were battery operatedAlthough the case is complete, the internal circuitI now have a second one, complete with tubes,The TE-149 has an unusual tuning mechanism with a spiral disc which operates the tuning pointer,It covers 0.1 to 35 MHz.http://closehorses.com/userfiles/cutler-hammer-spb-100-manual.xml The unit has no detector or indicating device -It's title (believe it or not) is '6625-99-972-6347 Detector Radio Frequency'.However the case and chassis are clearly commercial, and the brand name on the dial plate 'Belmont' belongs to a Chicago firm. The radio isIt's my guess that the radio was actually assembled in New Zealand, and (possibly)The valves are Octal types. It is a conventional four-valve plus rectifier design with a wooden case embellished with marquetry veneer. The veneer continues in a smooth radius around the sides, and it's my guess that the veneer was laid up and moulded in a jig.There were numerous look-alike but not necessarilyAll are single-band receivers. The two that I have are the US Army BC-453-B (3 - 6 MHz),The different models use different IFThe receivers are 28 Volt operated,The tube lineup is VT-131 (12SK7), VT-132 (12K8), 2x VT-131, VT-133 (12SR7) and VT-134 (12A6).RF gain was used to manage the signal. The two IF stages have AGC, and there is delayed AGC on the RF amplifier. There is noThe gain control, power and. BFO switches were also remote (see sub panel on left receiver above). Again these controls were usually adapted by amateur usersThere are interestingThe BFO (crystal controlled on 600 kHz) is used as a marker, and corresponding calibration points are indicated on the dial every 600 kHz.Oddly, two bands are served by each set of coils. The four bands have individual edge-viewed dial scalesThe drum is rear-lit, each band illuminated separately when selected. The higher two bands tune faster than the lower two, and the multi-turn nature of the dial (with individual pointers which followThe wiggly line across the dial drum cover is an individually calibrated cursor, used to compensate for slight non-linearity in the tuning mechanism.http://fscl.ru/content/boss-br-600-manualIt has clearly been repainted at some point (originally RAF grey or black),The internal shields and other metalwork, and even the case,The various stages are all mounted in individual plug-in modules along the back of the receiver, while the band switchThe guard receiver is crystal controlled and monitors a special calling frequency. The output feeds directly into the main. IF chain, and has its own RF gain control. The knob on the module is a frequency trim.To the left of the display drumSelectivity is provided by double-tuned IF coilsFront panel audio output is intended only for headphones. There are line and high level outputs on the back.Power requirement is about 60 Watts,I've not attemped to restore the receiver yet - but I will. I did sling together a power supply to test it, and it works. Not very well, but. I can hear signals. This is therefore currently my oldest working radio.It uses the (then) new Loctal type valves,The Ultimate brand was manufacturedRadio 1936 Ltd manufactured many of their own parts.The last mentioned three valves can be seen left to right in the rear view picture.The two cans are of course the two IF double-tuned circuits. The case is moulded from casein, an early plastic material. The loudspeaker was made in Australia by Rola. On the rear panel, in addition to the model and serial number label, you can see the remnants of. Limited', who were patent attorneys and representatives at the time. Many of theIt was my first radio receiver, and I used it to listen to 'DX' broadcastIt covers 480 kHz to 30 MHz in five bands,The receiver has 15 valves, mostly miniature, including a voltage regulator for the oscillators. It is interesting to compare this Eddystone with the next one, as although they have similar appearance, this one is much more complex. It has two RF stages, two IF stages, and push-pull audio output.http://dumaxsrl.com/images/carrier-economizer-manual.pdfThe receiver has adjustable IFThe power supply tends to generate noise, so itThe exceptions are the rectifier and voltage regulator tubes. Plenty of audio is providedPerformance is adequate, although it is a bit flat above 15 MHz. Not small, the receiver is 450 mm wide and 220mm high, 300mm deep,The front panel is diecast, and the case is finished in hammerglaze grey. It took me a while to find the headphone socket - it's on the left side!Built for a different marketThere are only seven valves, and no 'S' meter on the panel. The valves are from the 'Noval' 100mA filament U series.The ballast resistor is missing, so it is committed to run from 110V AC; there are variousThe BFO knob to the right of the. Tuning knob is not the original one.The brochure comments that the receiver covers the 500 kHz marine frequency.It's considerably lighter than the 680X. I can't comment on the performance yet, as this radio has yet to be restored.Even today the performance is impressive. It is very stable, as it uses the famous Collins. PTO (permeability tuned oscillator). The receiver covers 540 kHz to 30.5 MHz in 30 x 1 MHz bands. Band change is achieved using switchedThere are 16 miniature valves.Sensitivity at 30 MHz is very good.Unlike the one in the photo below, mine includes a black desk-top rack case. Its history is interesting - it was imported for propagationIt uses 12 valves.Coverage is not continuous. Some of the bands in my receiver have been changedIt's also a 110V receiver, so not the most convenient. This is the oldest receiver I have which uses a product detector, and SSBThe second IF is 455 kHz. It has a single SSB mechanical filter. The vernier tuning dial is rather nice, but has rather slow tuning andReception is adequate, even on 10m. The preselector is annoying as the planetary drive slips at times. Please upgrade your browser or activate Google Chrome Frame to improve your experience. Maybe try one of the links below or a search. Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser. Translate this page: Relevant AUDIO forum topics: Blaupunkt CAR300 autoradiohoz kod kellene ( megoldva ) Sziasztok! Ma hoztak ezt az opel radiot, de nincs meg a kodja ebbe kernek segitseget. A radion a kovetkezo szamokat talaltam:A csatolt kepen lathato fogaskerekre lenne szuksegem (jo allapotura). Mar regota keresem, semmi sikerrel. Remelem azota valakinek akad a lomok kozt. Udvozlettel: Gyula! Sony STR-DE485E hazimozi erosito nem ad hangot, a vegfokmeghajtok melegszenek. MEGOLDVA Udv! Segitseget szeretnek kerni a cimben emlitett Sony STR-DE485E hazimozi erosito javitasahoz! Egyik havere a keszulek, es leginkabb a digitalis bemenetet hasznalta eddig rajta. Azt mondta, hogy amikor epp 5.1-es jelet kuldott ra elhallgatott par csatorna. Eloszor meg helyreallt kis idore, aztan mar egyaltalan nem szolt az analog bemeneteken sem. Fejhallgato kimenet is teljesen nema. A kijelzon semmilyen hibat nem mutat. Eloszor a bemenetvalaszto IC-re gondoltam, ami a fo panel aljan van, mert korabban talalkoztam mar olyannal, viszont annak a tapja okes, nem is melegszik, szoval ezt a lehetoseget egyelore jegeltem. Persze ettol meg lehet hibas.IC, ami 10V-ra szabalyozna ezt le, majd jonne a kovetkezo, ami 3,3V-ra. Erre a 2 feszultsegre van szuksege a tunernek. A gond ott van, hogy az a 27V valamiert 40V-on all, a 2 stab. IC-t kilotte. Hidegek, es minden labukon ez a 40 V jelenik meg. Gondolom a tunernek vege, de ez vegul is nem olyan nagy gond, csak gondoltam leirom ezt is, hatha van valami koze a nagyobbik problemahoz.Erdekes lenne, ha egyszerre lenne hibas mind. A fo tapfeszultseg mondjuk megvan, 48,5V mindket oldal (pozitiv es negativ is), de a service manual 53V-ot, tehat itt is lesz valami gubanc, feltetelezem, az elobbi IC-k nem a semmiert melegszenek. Ami plusz erdekes, hogy a NEC IC-k labain a service manualban megadott ertekeket mertem. A vegfok tranzisztorokat mertem, nem zarlatosak, a koztuk levo 2x0,22 Ohm-os ellenallasok ertekei megfelelok. Jelenleg itt tartok. Amit majd megnezek, hogy levalasztom a 3 vegfok-meghajto tapjat, hogy ugy felmegy-e 53V-ra a tapfeszultseg!? De tenyleg fura, hogy mind a harom annyira melegszik, ketlem, hogy normalis lenne. Vettem a cimben szereplo erositot. Kisse hianyos allapotban,azzal a cellal hogy csinalok belole egy asztali sztereo erositot. A hianyossaga a front elolap panal,de ez nem is kell. Se melegedes,se egesnyom nem talalhato a panelen. Az a furcsa hogy mind a ketto csatorna ugyanezt produkalja. Kezdek felcsomozni,mert nem egy szerelobarat keszulek. Vegfok tranzisztorok kimerve,meghajtok kimerve. Minden segitokesz valaszt szivesen fogadok.You can write in English language into the forum (not only in Hungarian). These manuals are available for download and free of charge.Contact and submission information belowIt would only be possible with a large scale scanner. Such as a DS-70000 or something else that could scan 11.5x100 paper. See email information below (be sure to include BAMA in the subject line). Compliments of Morris Odell, VK3DOC. These manuals are available for download and free of charge.Or, you can email me directly with the manual. I accept all formats. Once found enter the fullYou need to tell us the Make, Model, Type and Contents.After purchaseFor bulk purchaseCDC- 4 or 274 or 1125. Learn more - opens in a new window or tab This amount is subject to change until you make payment. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab This amount is subject to change until you make payment. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab Delivery times may vary, especially during peak periods. Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn more The item may have some signs of cosmetic wear, but is fully This item may be a floor model or an item that has been returned to the seller after a period of use. See the seller’s listing for full details and description of any imperfections. Contact the seller - opens in a new window or tab and request a postage method to your location. Please enter a valid postcode. Please enter a number less than or equal to 0. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. This web publication contains 143,408 pages ofThis arose from the way that Eddystone built the sensitive parts of their radio receivers as an assembly of screened diecast boxes. Having invested in the dies, they maximised the return by selling the boxes to distributors of electronic components such as STC Components, Radiospares and Maplin Electronics.At about this time Marconi decided that Eddystone Radio should pull out of the High Street and concentrate purely on professional receivers. The size of ships grew, requiring fewer radios. Satellite communication became a practical reality. This was very successful and took things into the 1990s when Eddystone and the BBC pioneered the new Digital Audio Broadcasting (DAB). Unfortunately the expected expansion did not materialise. After three years in the doldrums Megahertz went into receivership and Eddystone Radio (receivers) was sold to Ring Communication; the Transmitter section was sold to SBS of Hastings and is now known as Eddystone Broadcasting. By using this site, you agree to the Terms of Use and Privacy. Before starting this long winded task I gave all grub screws on the knobs a squirt of WD40 and left them for a couple of hours to loosen them up as previous experience with old sets had found undoing them could be a pain. Everything else in the gearbox was also cleaned and greased so that the gearbox rotated freely then the pointer drive cord was fitted and the front panel was ready to be fitted back onto the chassis. Before fitting the front panel back, I thought it would be a good opportunity to clean all of the switches and variable resistors as I did not want to have to take the front panel off again. Comparing it to the pictures I had of untouched receivers, I found out that a tag strip was missing from the right side of the picture where all the wires from the wiring loom should be attached, so I had to rewire it up again and I also found that a couple of valve heater wires had also been disconnected from the bottom of the valve bases. The switch under the chassis was the AF Filter switch and where that should have fitted on the front panel, a variable resistor had been added and fitted to the front panel where it had been wired in. I removed the modifications and rewired the receiver to its original condition and switched it on. Much to my delight everything lit up and after a few seconds sound came from the loudspeaker, I tuned into a AM broadcast station and everything sounded OK so the receiver was working and now it was just a case of checking voltages and replacing faulty resistors and caps and tuning it up properly to get it back to A1 condition. Please refer to ourIf you are interested in consigning in future sales, please contact the specialist department. If you have queries about lots purchased in this sale, please contact customer services. By continuing to use the forum you conform your acceptance of these. If you are not happy to accept these you must stop using the forum and delete our cookies from your browser. It should be about 60V less than this. First thought was that the previous owner had set the transformer input for 200V instead of 230V but that wasn't the case. What on earth can cause a mains transformer to give a larger output than it should? (It's the original Eddystone item,as is the Choke). One of the consequences of this is that the VR150 is drawing about 20mA more current than it should which presumably is what burnt out the resistor. The smoothing capacitor (the one after the choke, I can never remember if that's the smoothing or reservoir capacitor) has also been replaced by a previous owner. Any thoughts gratefully received, JimRegards PeteThe circuit is not in the Trader CD so I do not know whether it should be choke input.Eddystone Users Group, available for free download.I seem to remember finding no fault to cause this and put it down to manufacturing tolerances and the nominal 245V mains input because the HT dropped to just above the correct value when the mains was reduced with a variac to 230V.I'll measure the transformer AC output tomorrow. I've done that already but can't remember what it was! JimEddystone Users Group,available free download. As I said I don't think there's any obvious fault so it must just be a high tolerance transformer, JimI seem to remember finding no fault to cause this and put it down to manufacturing tolerances and the nominal 245V mains input because the HT dropped to just above the correct value when the mains was reduced with a variac to 230V. I'll have to find something else to put in series with the mains, JimR66 is the wirewound which burnt out, JimJim I've just had a thought: there's another 40uF capacitor wired across the original by a previous owner. I've assumed this is because the original is duff but what would happen if it wasn't? I would then have the equivalent of an 80uF smoothing capacitor - would this cause a rise in HT voltage?To reduce the HT and heater voltages I did a quick fix by wiring a resistor across one of the mains fuse holders and removed the fuse. I selected a resistor that would result in a 6.3 volt heater voltage.Too much capacitance will increase the voltage and potentially damage the rectifier.Presumably measured with 230V ac input. AC from either side of ht winding to chassis - 240V. Rectifier cathode to chassis - 252V. HT line after choke - 220V Stabilised HT - 150V. Hope that helps. RogerThis lower current flow will result in higher voltages all round, as there will be less drop in the transformer and rectifier and more chance for the HT to rise towards (transformer HT winding volts) x 1.414. You might want to do some checks to confirm whether other parts of the rx are drawing the correct current. RogerMany thanks. JimTo reduce the HT and heater voltages I did a quick fix by wiring a resistor across one of the mains fuse holders and removed the fuse. I selected a resistor that would result in a 6.3 volt heater voltage. Many thanks, JimI've also fitted new reservoir and smoothing capacitors. However, listening to some music on MW the audio sounds pretty awful. I know it's not a HiFi set but a push-pull amplifier as the output should sound better than this does. So, next task is to have a look at the output stage, although it might be more sensible to check all the coupling capacitors first. JimThe first two are a must, however 'good' they may look. Regards Pete. It was intended to help members of the Eddystone User Group identify their areas of interest and further their knowledge of the marque. In this it succeeded, being well received and creating a demand for a revised and more detailed Edition. This was done in 2000, covering most sets from This is now out of print and the opportunity is being taken to fulfil members wishes and produce an edition which attempts to cover Eddystone receivers from the very earliest days of the twenties until the present time and give a picture of each. At the same time a short history of the Company is presented, especially for new members. Much of the information contained herein has been covered in greater detail over the past twelve years by the Lighthouse magazine and its predecessor, the EUG Newsletter. Something approaching 3,000 A4 pages have been produced over this period.It was therefore necessary to order a reprint. The opportunity has been taken to correct minor errors in the text and this reprint is being issued gratis to all members. Please note that Page 59 now carries an Appendix of information which was not available to me in Check it out. Extra copies may be obtained at a price commensurate with the new postal charges. Application should be made to the Editor and an invoice will be included with despatch. Graeme Wormald, G3GGL Bewdley, January ODDBALLS and LATER STYLE NUMBERS 31A 43 40A 43 B34 23 EC10 40 EY11 42 EA12 38 EP14 53 EP15 53 EP17R 53 EP20 53 EPR26 53 EPR27 53 EM34 29 EB35 41 EB36 41 EB37 42 EC EP EP EC LP R R R They appear to follow a pattern and then lose the plot. In this table we have ignored the S prefix which is sometimes used and sometimes not in company literature, even for the same set! 7 Birmingham is one of Britain s newer cities, having grown enormously after the introduction of the canal system in the late 18 th century. Metal goods of every description were produced and it was rightly known as the city of a thousand trades. IN THE BEGINNING In the year 1860, Stephen Jarrett of Gloucestershire joined in partnership with Charles Rainsford of Birmingham. The former was a pin manufacturer and the latter a commercial traveller. Premises were taken at No 7 Broad Street, Islington, Birmingham. Probably somewhere near Five Ways where Broad Street now joins Hagley Road on the A456. Business settled down well and in 1870 the firm moved to larger premises at 48 Broad Street. Probably near the present-day Symphony Hall. Here they were to remain for the next 39 years until early in the 20 th century. In the meantime the company acquired a new office boy in A NEW KID ON THE BLOCK He was 15-years old George A. Laughton who had two years previous experience in a coal merchant s office. By all accounts, G.A.L. (as he was always thereafter described) was a bright lad and soon showed the entrepreneurial instinct which was to create an empire. By 1904 he was an assistant manager with the firm. In 1909 the move to Kent Street took place, near the Birmingham markets area and just round the corner from the Bromsgrove Street location of Balmoral Works; later to become famous as the home of Eddystone Radio. Components were bought in from a small supplier who suffered from the ravages of alcohol and supplies were erratic. To cut a long story short G.A.L. bought the business for 50 and acquired four hand presses and two girl workers. He named this enterprise Stratton, reputedly after the hero in a novel his wife was reading. In practise this is slightly questionable, as his eldest son, also named Stratton, was probably about 7 years old by then. During the First World War the firm manufactured parts for the famous SE5A British fighter plane and acquired much experience in the use of aluminium and duralumin alloy. This was to be of great value in the radio business. Although artificial jewellery was back in production, pins were still a staple part of the company s output. NEW TECHNOLOGY ARRIVES In November 1922 the British Broadcasting Company (BBC, and forerunner of the present Corporation) was formed and started broadcasting with low power medium wave AM transmitters in major British cities. The best known of these stations was 2LO, the London station in the Strand. The Birmingham station (5IT) was opened the next day. Young Stratton Laughton became a wireless fan. Equipment was expensive. Home construction was widespread. HOLLYWOOD STRIKES Although talking pictures were not to arrive until the late twenties, the cinema had become a major source of entertainment during the First World War. The Roaring Twenties were created by this media, especially by the film Flaming Youth starring Jazz Baby Coleen Moore. She introduced the pageboy haircut, which needed no hairpins at all. Stratton s market dwindled overnight from six tons to one. Coleen Moore s pageboy cut 1923 This happened towards the end of 1923 and Stratton Laughton suggested to his dad, George (Abe) Laughton that the shortfall in sales be made good by entering the radio components field. This is where we enter a slightly grey area in the company s history. Following total loss of records due to enemy action during 1940 there is very little hard evidence to go by. Stratton Laughton claimed that the company started manufacturing 10 My own personal view is that these claims are slightly premature. Stratton s first radio-related patent was filed in February 1925, as was the Trademark Eddystone and the Lighthouse device. The company s single 1 BBC share certificate (which escaped the blitz) is dated September By the end of 1925 there were 1716 members of the BBC. The first written reference to an Eddystone receiver (that I can find) is in the Wireless World listings for spring ( Eddystone Twin ). I don t really think the first complete receivers were constructed until the end of 1925 and marketed in A fruitful area for ongoing research, I think. All contemporary evidence gratefully received by the writer. In the meantime we do know that Stratton s took on board Harold Cox and Arthur Edwards (G)6XJ during this period and that these two were to provide a driving force for the next forty years. Their names crop up again and again in Eddystone history. Harold became Technical Director and Arthur became Sales Director, continuing with the firm until the late 1960 s. THE SHORTWAVE REVOLUTION By 1927 short waves were well established across the world, due to the pioneering work of early radioamateurs. One of these was Gerald Marcuse, G2NM, who obtained a permit from the British Postmaster General to transmit speech and music to the British Empire. Power was to be 1 kw input, wavelengths 23 and 33 metres and the first transmission was on September 11 th The experiment continued for almost a year. The BBC also started experimental broadcasting on 20 metres from G5SW, Chelmsford (Marconi) in November The result was a demand for shortwave receivers from expat Brits. By 1930 the company had ceased making medium wave only sets and from then on everything was focused on the higher frequencies. George Brown G5BJ works on a VHF Lecher Line transmitter (G6SL) in the roof-top laboratory at Stratton s Balmoral Works, Signals were received in New York. 11 Eddystone receivers were used by many scientific expeditions of the 1930s, such as the British Arctic Air Route Expedition and the Hudson Strait Settlement Expedition.