FERGUSON MOD. 38030 YEAR 1986

The FERGUSON  Mod.  38030  is a portable 12 inches B/W Screen with ONLY UHF Channels reception capability.

Marketed with the FERGUSON Brand It's made by Thorn EMI.

THORN'S new 12in. monochrome portables, Models 38020 and 38030, have been designed to sell at a suggested retail price in 1985 of just £49.95. They are fitted with a new chassis and are being produced at Thorn's Gosport  TV plant. This is good news indeed, since it shows that the UK's TV industry can produce and sell sets in even the  most competitive section of the market. To make this possible, the sets have a minimal component count and a  mechanical construction of extreme simplicity. They weight just 131b and have a consumption of typically 1A. Fea-  tures include rotary electronic tuning, an earphone socket and a foldaway loop aerial.     

Was fitted with a monocarrier chassis featured with a Monomax i.c. is where the novel circuit features are to be found, so most of our article will be devoted to this. The i.c. incorporates 200 linear devices, 200 gates, one million ohms of resistance and 120pF of capacitance on a 12,700 square mil chip. To make this possible and to reduce the dissipation, the i.c. is operated at 8V instead of the usual 11-12V. This enables the area occupied by the minimum size transistor to be reduced by 30 per cent, giving an overall 15 per cent reduction in the chip size. A further key aspect is the inclusion of a nitride step in the process of chip fabrication. This provides reliable junction seals and enables stable capacitors with three times the values possible with normal oxide films to be incorporated. The i.c. dissipates less than 500mW.

Ferguson Electronics (formerly known as Ferguson Radio Corporation) is an electronics company specializing in small electronics items such as radios and set top boxes.

History

Ferguson is one of the older electronics companies, alongside Ultra, Dynatron, Pye and Bush radio in the United Kingdom. It was originally an American–Canadian pre-War company making radio sets for the U.K. market based upon contemporary American models. After World War II, it became Ferguson Radio Corporation, making radio receivers and, later, televisions. Later still, it became part of the British Radio Corporation. It was taken over by THORN Electrical Industries in the late 1950s, but the Ferguson name continued to be used by Thorn, and its successor Thorn EMI.
Throughout the company's early history, Ferguson products were very popular across its wide customer base. By the early 1960s its wide product range included a most comprehensive range of audio and TV equipment. Small, battery-operated portable transistor radios to solid oak 6 ft wide hydraulic lid radiograms sporting fully automatic stackable Garrard turntables, multi-channel radios and 2-foot-wide stereo speakers were commonplace in many UK households. Open reel tape recorders and hi-fis followed.
Sales held well, with 1980s new introductions including personal cassette players, CD players and video recorders.
The 1980s saw much competition from foreign brands such as JVC, Tandy, Hitachi and Sanyo. Even High Street electrical outlets such as Dixons and Currys introduced own brands manufactured in the far East, such as Saisho and Matsui. This took its toll on the Ferguson brand and during the late 1980s, it was sold off to the French electronics company Thomson. Thomson itself subsequently withdrew from the competitive European consumer electronics market. The Ferguson brand was licensed initially to DSI (Dixons and Currys). DSI ceased using it in 2006 and competitor Comet took up the licence.
The 2000s have seen the introduction of Ferguson branded Freeview set-top boxes, DVD players and recorders and DAB radios.

Today

The Ferguson brand is used by Comet on a range of DAB digital radios as well as Freeview set top boxes and a range of other electronics items.

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Thorn EMI was a major British company involved in consumer electronics, music, defence and retail. Created in October 1979 when Thorn Electrical Industries merged with EMI, it was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index but it demerged again in 1996.

History

The Company was formed in October 1979 when Thorn Electrical Industries merged with EMI.
In May 1984 the Company attempted to merge with British Aerospace and in July 1984 it bought the micro-chip manufacturer, INMOS.
Thorn EMI acquired the Mullard Equipment Limited ('MEL') division of Philips in 1990.
On 16 August 1996, Thorn EMI shareholders voted in favour of demerging Thorn from EMI again: the Company became EMI Group plc, and the electronics and rentals divisions were divested as Thorn plc.

Thorn EMI's wide range of business covered five principal areas of activity; television broadcasting, retail/rentals, defence, music and consumer electronics.

Television broadcasting

Thorn EMI was, until a share flotation in 1984, the majority shareholder in the London-based ITV broadcaster Thames Television.
This shareholding was inherited from the 1967 purchase of the Associated British Picture Corporation by EMI. The deal included their interests in the ITV company ABC Weekend Television. Through an enforced merger with Rediffusion London, this became Thames.
In 1985 the company attempted to sell their stake to Carlton Communications but this was blocked by the governing body of ITV, the Independent Broadcasting Authority.

Retail and rental

Radio Rentals, DER and Rumbelows (which was sold in 1995) Rent-A-Center

Defence

From its formation until the mid-1990s Thorn EMI was one of the United Kingdom's largest defence companies.
The MEL Division, acquired from Philips, was involved in radar, electronic warfare and communications. The MEL communications business was sold to Thomson-CSF, now Thales.
In 1995 the various defence businesses were sold:

• Thorn EMI Electro Optics to Pilkington Optronics
• Thomson Thorn Missile Electronics to Thomson-CSF, now Thales
• Thorn Sensors Group to Racal (to become Racal-Thorn Wells, now also part of Thales)

Music

The EMI label expanded greatly as part of Thorn EMI. In 1989 Thorn EMI bought a 50% interest in Chrysalis Records, buying the outstanding 50% in 1991. In one of its highest-profile and most expensive acquisitions, Thorn EMI took over Richard Branson's Virgin Records in 1992.

Computer Software

Main article: Creative Sparks

In the early-to-mid 1980s, Thorn EMI Video Programmes released a number of games for several home computer formats, initially under their own name. They received a lukewarm reception with no major hits (though Snooker and Billiards did reach No. 6 in the UK Atari Charts). These included Snooker and Billiards, 8-Ball and Tournament Pool, Darts, Cribbage and Dominoes (1981) Gold Rush, Mutant Herd, Road Racer and Volcanic Planet (1983) and River Rescue (1982). The label was later renamed Creative Sparks.
From 1981 till about 1983, Thorn EMI Video Programmes was based in the Thorn EMI head office near Seven Dials in central London. They moved from there to an office in Soho and the name changed to just Thorn EMI Video. TEV later became Creative Sparks.

Security Systems

Thorn Security installed and serviced all types of electronic security systems from their bases around the UK. The business was absorbed into ADT soon after the EMI demerger and all but a handful of the famous red 'THORN' bellboxes replaced. However, the Fire products especially are still to be found in many premises and until recently spares and complete systems of Thorn heritage continued to be manufactured by ADT.

Business Communications

This division, based in Marlow provided hotels with televisions and related equipment. It also embarked upon a project called Hotel 3000 which provided interactive Set-Top-Boxes for hotel rooms in the late 1980s.
After Thorn's demerger, this division started operating as Quadriga

Advanced Product Development Centre

This small subsidiary further developed existing products as well as introducing new ones. It was based in St.Lawrence House, Broad Street, Bristol.

Consumer electronics

Ferguson Radio Corporation was owned by Thorn EMI and it made consumer electronics like TV sets, VCRs, etc. TVs were designed and manufactured by Ferguson in the UK until around the early 1990s, although before this, some Thomson-designed models were introduced to the Fergsuon range of TVs for sale in the UK. Some of these Thomson-based models were even manufactured in the UK, although in later years, these models were made outside the UK by Thomson.
By 1992, the Ferguson TV factory in Gosport had closed, ending a long period of manufacturing of Ferguson TVs in the UK.
VCRs were sourced until the early 1990s by a joint company called J2T, established by JVC, Thorn (Ferguson) and Telefunken. From around 1991, VCRs were sourced from Thomson alone.
One important aspect of Thorn EMI’s business was its ability to manufacture, say, one of its Ferguson televisions and then to make it available for rental through its rentals sector or sell it through its retail sector.
Prism Micro Products was owned by Thorn EMI for a short period in the 1980s.

Domestic appliances

Kenwood Limited: The company is now owned by DeLonghi.

Thorn EMI Video

Thorn EMI Video was established in 1977 and produced three made for video films for the British market: Cross Country (film) (1983), and Strange Invaders (1984) and Bloodbath at the House of Death (1984). Thorn EMI became popular with rental stores. In the U.S., Thorn EMI released films on video from various film companies including Orion Pictures (The Terminator, First Blood) and New Line Cinema (The Evil Dead, Xtro), and Universal (Bad Boys and Frances) in the 1980s.
Thorn EMI joined HBO in 1985 to be named Thorn EMI HBO Video. In 1986, Cannon films bought Thorn EMI's video library, but HBO stayed and became HBO/Cannon Video. Cannon left operations and was eventually just called HBO Video in 1987.

After Demerger

Thorn was purchased by Nomura Principal Finance Group in 1998, which subsequently became Terra Firma Capital Partners. It disposed of Thorn in 2007 to a private buyer.

References

Strange, R. (2002). Japanese Manufacturing Investment in Europe: Its Impact on the UK Economy. Taylor & Francis. p. 303. ISBN 9780203036976. Retrieved 2015-08-25.

"Intellectual Property Office - GOV.UK". ipo.gov.uk. Retrieved 2015-08-25.
 

FERGUSON Mod. 38030 CHASSIS (1790) T1101E INTERNAL VIEW.

The chassis is a simple monocarrier based mainly on a monochip MC13002P from MOTOROLA which is a Monomax Black And White TV Subsystem.Neat layout within the 38030, with just about everything on the single printed panel.

The new chassis is the 1790 (T1101E) series which is shown in block diagram form in Fig. 1. There are a few features in
common with the previous 1696/1697 series - the same tuner plus SAWF with driver at the front end, a.c. coupled
BF391 video output stage, a similar line output stage with BU807 line output transistor, and an 11V series regulator
with differential error amplifier. Further simplification whilst maintaining performance is hardly possible in these
areas. The main change is the use of the Motorola Monomax i.c. This 28 -pin device incorporates the i.f. strip, video
processing section, a.g.c. and sync separator circuits along Model 38030 left Model 38020 right with the field and line generators, and does so with a minimal external component count. It also incorporates an
8V regulator. A TDA1190P i.c. is used as the sound channel, and there's a discrete component field driver/output stage (TR6/7/8). The only stages apart from the items so far mentioned are an amplifier (TR11) between the Monomax i.c. and the line output stage and an amplifier/inverter (TR9) in the flyback pulse feed to the Monomax i.c. There are only three tuned coils in the whole set - tuner coupling, 6MHz trap and sound detector quadrature coil.
There are just two timebase presets - line hold and height. The contrast and brightness controls are both presets, with screwdriver access through the rear of the cabinet. The two front controls are for tuning and volume/onoff. These are also mounted on the single printed panel.

The Monomax IC:

The Monomax i.c. is where the novel circuit features are to be found, so most of our article will be devoted to
this. The i.c. incorporates 200 linear devices, 200 gates, one million ohms of resistance and 120pF of capacitance
on a 12,700 square mil chip. To make this possible and to reduce the dissipation, the i.c. is operated at 8V instead of
the usual 11-12V. This enables the area occupied by the minimum size transistor to be reduced by 30 per cent,
giving an overall 15 per cent reduction in the chip size. A further key aspect is the inclusion of a nitride step in the
process of chip fabrication. This provides reliable junction seals and enables stable capacitors with three times the
values possible with normal oxide films to be incorporated. The i.c. dissipates less than 500mW.
A block diagram of the Monomax i.c. is shown in Figure. The differential i.f. input is fed to a four -stage i.f. amplifier
whose first two stages are gain controlled. To bias the amplifier, balanced d.c. feedback is decoupled at pins 2
and 6 and applied to pins 3 and 5 via 2.2kft resistors. For optimum noise performance, the gain control applied to
the first stage is delayed until the gain of the second stage 27V has been reduced by 15dB.
The following detector stage is the first unusual feature, since there's no external coil. Instead of a synchronous
detector, a simple full -wave circuit is employed. To compensate for the non -linearity introduced by this type of
detector, a second similar detector is used in a feedback linearising circuit - the idea is shown in Fig. The
performance achieved is equal to that provided by a conventional synchronous detector, the advantage being
that no adjustment or external filtering is required. The video processing section provides contrast control,
black -level clamping and beam limiting - the latter feature is not used in the 1790 chassis, being unnecessary in view
of the a.c. coupling employed in the video output stage. The clamp reservoir capacitor is connected to pin 25, the
clamp pulses being derived from phase detector 2 in the line timebase phase -locked loop. A flyback -blanked, low impedance video output is provided at pin 24. The video signal is also fed via a noise filtering and gating circuit to the a.g.c. circuit, which is both sync and flyback gated, and to the sync separator. The a.g.c. reservoir capacitor is connected to pin 8. The components connected to pin 7 form an anti -lockout circuit for the gated a.g.c. system. There are two time -constants, C9/R63 and C8/R12, D4 conducting when the field sync pulse arrives to bring C8/R12 into operation.
The line and field generators are controlled by a 31.25kHz oscillator. This uses a novel design, with an on chip 50pF nitride capacitor, and produces a sawtooth output. The oscillator's output is sliced, divided by two and fed to the two phase detectors in the line frequency phase -locked loop. This part of the circuit follows conventional practice, with the first detector locking the oscillator, via pins 13 and 12, to the line sync pulses whilst the second detector compares the phases of the oscillator's output and the line flyback pulses. The output from the second phase detector controls a pulsewidth modulator to get a correctly phased line drive signal. This is divided by two and fed out at pin 17 via a buffer stage.
The most unusual section of the i.c. is the field circuit. Instead of a conventional field oscillator, a ten stage
divide -by -625 counter is used, driven by the sliced output from the 31.25kHz oscillator. This avoids the need for a
hold control and close tolerance timing components. The output from the counter is fed via the window control
circuit to the sync gate, which allows the field sync pulse through to control a conventional field generator - the
charging components that produce the ramp are connected to pin 20. The field sync pulse also resets the
counter via an OR gate. In the absence of a field sync pulsethe counter is reset via the window circuit and the OR gate.


The window circuit controls the time during which the sync gate is open. There are two conditions, narrow and
wide, depending on the sync condition. When the circuit is synchronised, the gate is opened during the count 614 626. This is the narrow condition, and provides good noise immunity. A coincidence detector in the window circuit
checks the synchronisation. If this detector finds that there is non -coincidence between the gate and sync pulses eight
times in succession, the gate is opened during the count 484-644. This is the wide condition, giving rapid field
locking. In effect, this is the first digital field oscillator to be used in a UK produced TV chassis.
The single PCB used in the 1790 chassis is a compact 4i x 134in. It's held in position by runners in the moulded
two-piece cabinet. The only components not mounted on the board are the tube with its yoke and the loudspeaker.
The tube's graphite coating is taken up to the protection band so that no earthing spring is required, whilst the
aerial plug is soldered directly to the tuner. There are just ten screws to hold the whole lot together. It would be
difficult to devise a simpler form of construction.


The MONOMAX is a single-chip IC that will perform the electronic functions of a monochrome TV receiver, with the exception of the tuner, sound  channel, and power output stages.
The MC13001XP and MC13002XP  will function as drop-in replacements for MC13001P
and MC13002P, but some external IF components can be removed for maximum benefit. IF AGC range has been increased, video output impedance lowered, and horizontal driver output current capability increased.
GENERAL DESCRIPTION
The Video IF Amplifier is a four-stage design with 80 mV sensitivity.
It uses a 6.2 V supply decoupled at Pin
4. The first two stages are gain controlled,and to ensure
optimum noise performance, the first stage control
is  delayed until the second stage has been gain reduced
by 15 dB. To bias the amplifier, balanced
dc feedback is used which is decoupled
at Pins 2 and 6 and then fed to the input Pins 3 and 5 by internal 3.9 k resistors. The
nominal bias voltage at these input pins is approximately 4.2 Vdc. The input, because of the high level should be driven  from a balanced differential circuit.
For the same reason, care must be taken from the IF decoupling.

The IF output is rectified in a full wave envelop detector and detector nonlinearity
is coupled by using a similar nonlinear element feedback output buffer amplifier.
The detected video at Pin 28 contains the sound intercarrier and Pin 28 is normally
used as the sound , The video frequency response, detector 28, is shown in Figure
3 and the detector performance
Power supply is a simple linear type with mains transformer.

 Power supply is realized with mains transformer and Linear transistorized power supply stabilizer, A DC power supply apparatus includes a rectifier circuit which rectifies an input commercial AC voltage. The rectifier output voltage is smoothed in a smoothing capacitor. Voltage stabilization is provided in the stabilizing circuits by the use of Zener diode circuits to provide biasing to control the collector-emitter paths of respective transistors.A linear regulator circuit according to an embodiment of the present invention has an input node receiving an unregulated voltage and an output node providing a regulated voltage. The linear regulator circuit includes a voltage regulator, a bias circuit, and a current control device.


Power Supply: The examples chosen are taken from manufacturers' circuit diagrams and are usually simplified to emphasise the fundamental nature of the circuit. For each example the particular transistor properties that are exploited to achieve the desired performance are made clear. As a rough and ready classification the circuits are arranged in order of frequency: this part is devoted to circuits used at zero frequency, field frequency and audio frequencies. Series Regulator Circuit Portable television receivers are designed to operate from batteries (usually 12V car batteries) and from the a.c. mains. The receiver usually has an 11V supply line, and circuitry is required to ensure that the supply line is at this voltage whether the power source is a battery or the mains. The supply line also needs to have good regulation, i.e. a low output resistance, to ensure that the voltage remains constant in spite of variations in the mean current taken by some of the stages in the receiver. Fig. 1 shows a typical circuit of the power -supply arrangements. The mains transformer and bridge rectifier are designed to deliver about 16V. The battery can be assumed to give just over 12V. Both feed the regulator circuit Trl, Tr2, Tr3, which gives an 11V output and can be regarded as a three -stage direct -coupled amplifier. The first stage Tr 1 is required to give an output current proportional to the difference between two voltages, one being a constant voltage derived from the voltage reference diode D I (which is biased via R3 from the stabilised supply). The second voltage is obtained from a preset potential divider connected across the output of the unit, and is therefore a sample of the output voltage. In effect therefore Tr 1 compares the output voltage of the unit with a fixed voltage and gives an output current proportional to the difference between them. Clearly a field-effect transistor could do this, but the low input resistance of a bipolar transistor is no disadvantage and it can give a current output many times that of a field-effect transistor and is generally preferred therefore. The output current of the first stage is amplified by the two subsequent stages and then becomes the output current of the unit. Clearly therefore Tr2 and Tr3 should be current amplifiers and they normally take the form of emitter followers or common emitter stages (which have the same current gain). By adjusting the preset control we can alter the fraction of the output voltage' applied to the first stage and can thus set the output voltage of the unit at any desired value within a certain range. By making assumptions about the current gain of the transistors we can calculate the degree of regulation obtainable. For example, suppose the gain of Tr2 and Tr3 in cascade is 1,000, and that the current output demanded from the unit changes by 0.1A (for example due to the disconnection of part of the load). The corresponding change in Tr l's collector current is 0.1mA and, if the standing collector current of Tr 1 is 1mA, then its mutual conductance is approximately 4OmA/V and the base voltage must change by 2.5mV to bring about the required change in collector current. If the preset potential divider feeds one half of the output voltage to Tr l's base, then the change in output voltage must be 5mV. Thus an 0.1A change in output current brings about only 5mV change in output voltage: this represents an output resistance of only 0.0552.

In one embodiment, the current control device is implemented as an NPN bipolar junction transistor (BJT) having a collector electrode forming the input node of the linear regulator circuit, an emitter electrode coupled to the input of the voltage regulator, and a base electrode coupled to the second terminal of the bias circuit. A first capacitor may be coupled between the input and reference terminals of the voltage regulator and a second capacitor may be coupled between the output and reference terminals of the voltage regulator. The voltage regulator may be implemented as known to those skilled in the art, such as an LDO or non-LDO 3-terminal regulator or the like.
The bias circuit may include a bias device and a current source. The bias device has a first terminal coupled to the output terminal of the voltage regulator and a second terminal coupled to the control electrode of the current control device. The current source has an input coupled to the first current electrode of the current control device and an output coupled to the second terminal of the bias device. A capacitor may be coupled between the first and second terminals of the bias device.
In the bias device and current source embodiment, the bias device may be implemented as a Zener diode, one or more diodes coupled in series, at least one light emitting diode, or any other bias device which develops sufficient voltage while receiving current from the current source. The current source may be implemented with a PNP BJT having its collector electrode coupled to the second terminal of the bias device, at least one first resistor having a first end coupled to the emitter electrode of the PNP BJT and a second end, a Zener diode and a second resistor. The Zener diode has an anode coupled to the base electrode of the PNP BJT and a cathode coupled to the second end of the first resistor. The second resistor has a first end coupled to the anode of the Zener diode and a second end coupled to the reference terminal of the voltage regulator. A second Zener diode may be included having an anode coupled to the cathode of the first Zener diode and a cathode coupled to the first current electrode of the current control device.
A circuit is disclosed for improving operation of a linear regulator, having an input terminal, an output terminal, and a reference terminal. The circuit includes an input node, a transistor, a bias circuit, and first and second capacitors. The transistor has a first current electrode coupled to the input node, a second current electrode for coupling to the input terminal of the linear regulator, and a control electrode. The bias circuit has a first terminal for coupling to the output terminal of the linear regulator and a second terminal coupled to the control electrode of the transistor. The first capacitor is for coupling between the input and reference terminals of the linear regulator, and the second capacitor is for coupling between the output and reference terminals of the linear regulator. The bias circuit develops a voltage sufficient to drive the control terminal of the transistor and to operate the linear regulator. The bias circuit may be a battery, a bias device and a current source, a floating power supply, a charge pump, or any combination thereof. The transistor may be implemented as a BJT or FET or any other suitable current controlled device.

FERGUSON Mod. 38030 CHASSIS (1790) T1101E CRT TUBE SAMSUNG 310GNB4AS

 

FERGUSON  Mod.  38030 CHASSIS (1790) T1101E CRT TUBE SAMSUNG 310GNB4AS