SWL of shortwave radios in AM, Medium wave and Long wave, with WEB SDR in Europe by SWL F14368 Frank near Paris France. Informations about radio receivers for SWL, antennas, etc. Organiser of SWL contest 2023 and 2024.. This is my blog number ONE. Please visit my 2 other blogs about my listening. Thank you. 73

samedi 1 juillet 2023

DRAKE the brand for SWL Longwave, mediumwave & shortwave

 R. L. Drake Company


The R. L. Drake Company is a manufacturer of electronic communications equipment located in Springboro, Ohio. It is also known for its line of equipment for amateur radio and shortwave listening, built in the 1950s through the 1980s. The company operates as a separate entity owned by Blonder Tongue Laboratories, Inc.

History

The company was founded in 1943 by radio design engineer Robert L. Drake. The company began as a manufacturer of low pass and high pass filters for the government and amateur radio market, and after World War II, produced amateur radio transmitters and receivers and communications receivers for maritime mobile service.[1][2]

Amateur stations made up of Drake gear were used on a number of record-breaking hot air balloon flights, the RMS Queen Mary, and the Rutan Voyager.[3] Many of the Drake receivers, transmitters, and transceivers manufactured in the 1950s, 1960s, and 1970s are still in active use today. When founder Robert L. Drake died in 1975, the operation and management of the company was turned over to his 2nd son, Peter W. Drake.[3]

Today, Drake produces products and solutions for cable television systems, SD and HD video encoders, video signal distribution, and digital television reception under the Drake and Dracom brand.[4]

In February 2012, Blonder Tongue Laboratories, Inc. acquired R.L. Drake, LLC, reportedly for a purchase price of approximately $6.5 million, however, the companies will operate as separate entities; Blonder Tongue in Old Bridge, New Jersey, and R.L. Drake in Miamisburg, Ohio.[5]


FOR SWL

For short wave listeners, Drake produced the SW-4 receiver in 1967 (and later the SW-4A), which matched the rest of the 4-Line in appearance, was based on the R-4 design, but greatly simplified to be easier for the casual listener to use. It was replaced in 1973 by the SPR-4, a receiver similar in appearance to the R-4C but, again, simplified for ease of use. Its biggest difference, however, was that it was Drake's first all solid state design. It covered a greater portion of the high frequency (HF) and medium wave spectrum than did the SW-4, by using a large set of selectable heterodyne oscillator crystals for selecting the tuning range, each covering a 500 kHz wide segment. The receiver came supplied with 10 crystals and a user could add up to 14 more.

In 1978 Drake abandoned vacuum tubes (except for their use in power amplifiers) in favor of solid state designs and digital frequency synthesis. The new “7-Line” included the TR-7 transceiver, the R-7 receiver, and various accessories including two linear amplifiers, the L-7 and L-75.

The TR-5, largely a solid state version of the TR-4, was built and briefly sold during the early 1980s. Because so few of them were made they have become comparatively scarce.

Drake's final entry into the Amateur radio and Shortwave listening markets was the R-8 receiver in 1991 – a high performance digital design with advanced features specifically meant for shortwave broadcast listening. The receiver, which primarily covered medium and short wave bands, could be expanded to cover two VHF ranges with an optional, internal adapter. Further improvements led to R-8A and R-8B models before it was discontinued in 2005 after a long production run.[7][8]


Amateur radio products

Drake manufactured equipment for amateur radio operators and short wave listeners for more than three decades.

Longwave, mediumwave, and high frequency (HF) equipment

The Drake 1A receiver was the company's first meant specifically for radio amateurs. Introduced in 1957, it was revolutionary in at least two ways. First, it was much smaller than most receivers of the time period. The design emphasized simplicity and ease of operation. Second, it was designed specifically for reception of the relatively new and increasingly popular single sideband (SSB) mode of voice transmission.

In 1959 they followed the 1A with the 2A, a more traditional looking receiver that was a bit larger but still much more compact than its contemporaries. The 2A had more features, increased sensitivity and selectivity, and was introduced at the same price as the 1A. It was followed two years later by the 2B, very similar in appearance but with improved performance and a new set of controls for adjusting the selectivity (bandwidth) and center frequency.

Rather than produce a transmitter to match the 2B, Drake designed a new line of equipment beginning with an SSB transceiver, the TR-3, in 1963. Again emphasizing size efficiency, the TR-3 was designed as a complete SSB station in a small package. Other design innovations included crystal bandwidth filters and a permeability tuned oscillator (PTO) capable of extremely linear, stable tuning and a dial resolution of better than 1 kHz across all amateur HF (shortwave) bands. Its size was so small, in part, because the power supply was in a separate chassis, connected to the transceiver with a multi-conductor cable. The AC-3 power supply could be installed inside a matching speaker cabinet, later designated the MS-4. An optional remote VFO (PTO), the RV-3 could be added to the system to enable split frequency operation (i.e., transmitting on a frequency different from the receiving frequency). The RV-3 (and, later, the RV-4) also contained a speaker.

Beginning with the TR-3, Drake adopted a scheme for illuminating tuning dials and panel meters on its equipment using small incandescent bulbs behind greenish-blue transparent plastic filters. This lighting color became one of the most recognizable and distinguishing features of Drake radios.

The TR-3 was superseded by several versions of the TR-4, ending with the TR-4C and its variants in 1978. The TR-6, covering the 50 MHz (6-meter) amateur band, was also introduced in 1968 and was produced for about six years.

Because of their small size, the Drake transceivers were widely used for mobile operation, along with the DC-3 or DC-4 power supplies.

In 1965, Drake introduced the matching T-4X transmitter and R-4 receiver.[6] The "4-Line" twins satisfied a desire for high performance, operational flexibility and a set of features not possible to squeeze into the TR-4's small size. The matching units used the same PTO technology as the TR-4, and were capable of transceive operation using either the receiver's or the transmitter's PTO to control the operating frequency. Drake introduced the T-4 "reciter" which was a transmitter add on for the R4 series receivers (it had no PTO of its own and used the PTO and other signals from the R4 receiver to generate the transmit signal), making them a two piece "transceiver", but it saw limited sales and is a rare item on the used ham gear lists these days.

The 4-Line continued to be improved through ‘A’ and ‘B’ versions, and underwent a significant receiver redesign when the “C-Line” came out in 1973. The T-4XC transmitter and R-4C receiver employed a few more solid state devices but were still primarily vacuum tube designs.

Along with transceivers and separates, the 4-Line included a set of matching accessories including the L-4 linear amplifier, C-4 control console, W-4 and WV-4 power meters, transmit and receive converters for the 50 MHz (6 meter) and 144 MHz (2 meter) bands, and antenna impedance matching networks (tuners), the MN-4 and MN-2000.

Midway through the 4-Line's run, in 1967, Drake introduced a receiver and transmitter pair meant for the Novice licensee - the 2-C receiver and 2-NT transmitter. The 2-C was an improved receiver based on the 2-B design using a few more solid state devices. Thus, it was a sophisticated design compared to most other receivers targeting Novices. The 2-NT used a crystal oscillator to control its frequency, a requirement of the Novice license at that time (the restriction was later removed by the Federal Communications Commission (FCC)).

https://en.wikipedia.org/wiki/R._L._Drake_Company





Interesting links


http://www.g3zps.com/drake.html


https://slideplayer.com/slide/10030866/


https://web.archive.org/web/20070205073424/http://home.online.no/~sindtorp/


http://www.wb4hfn.com/DRAKE/DrakePageHome.htm


https://rigreference.com/manufacturers/drake
























The R.L. Drake Company, established in 1943, has been an innovative leader in the engineering and design of amateur and shortwave radio products. The 1-A receiver was the first commercially built single sideband receiver for the radio amateur. The somewhat radical 1-A represented a classic paradigm shift in amateur communications receivers focusing on performance, economy and fu nctionality rather than size! The company was headquartered in Miamisburg, Ohio until November on 1996. The Corporate headquarters is now part of the 90,000 square foot production plant in Franklin, Ohio. The office in Peterborough, Canada offers both sales and service. The office in Barcelona, Spain serves as the sales headquarters for Europe. The company discontinued production of amateur and shortwave equipment in the early 1980's to concentrate all efforts on the home satellite television market. The Service Department was maintained for those in need of parts or service. The introduction of the R-8 in April of 1991 announced their return to the shortwave market. The success of the R-8 was followed by the SW-8, the RSA and the most recent model, the SW-1. Drake has once again has positioned itself as one of the strongest shortwave receiver manufacturers in the world.


Chapter 19 Page 73

They are 25 radios receivers DRAKE for shortwave listeners


On right side up a Drake RR_3 of my friend Michel Ravigeaux R.I.P



Start from right Michel is the second, also Dario of Play DX first on the right died no a long time ago R.I.P

Meeting of Diexistas in Europe, year 1986. From left. From left to right: Anker Petersen, Chairman of the Danish SW Clubs International, Juan Carlos Codina (then living in the Netherlands), Finn Krone (Denmark), Michel Ravigneaux (Franca, deceased), Dario Monferini (Play DX, Italy)
















Aucun commentaire:

Enregistrer un commentaire

Please indicate in your comment your amateur radio callsign, swl, or your email

Remarque : Seul un membre de ce blog est autorisé à enregistrer un commentaire.