RME DB-23 preselector/amplifier from Radio Manufactures Engineers of Peoria, Illinois. This is basically a tuned radio frequency amplifier that is connected ahead of the station receiver. In doing that, you add RF gain and RF selectivity to your receiver, by adding tuned circuits and amplification ahead of the mixer. It follows then, that if you can get enough selectivity ahead of the mixer, the image frequency will be eliminated. In their mid-50's ads, RME quoted a minimum of 20 db of gain on all bands from 3.5 to 30 MHz.
This DB-23 Preselector was manufactured about 1954, and was intended to be used mainly with their 4300-series receivers (4300, 4350, & 4350A), but also the 84, 69, 50, etc. Using three 6J6 tubes.
RME ElectroVoice speaker.
RME LF-90 low frequency converter, output frequency 1550 kc.
RME MC-55 converter covers 80 thru 10 meters.
RME 45 - general coverage receiver tunes broadcast band to 33 Mc. One of the better post WWII receivers produced for the radio amateur in 1946, this set boasted of quite a few "innovations" in electronics derived from wartime experience. Voltage control and temperature compensated capacitors were to improve frequency stability; has variable xtal filter, ANL, relay control and break-in terminals on rear apron, illuminated dial and "S" meter, tremendous mechanical bandspread and two speed tuning, BFO and pitch control for CW reception and many other features, frequency covered: .55MHz to 33MHZ in six bands. Uses loctal tubes except for the rectifier and the VR, 10 tubes total. The shipping weight on this item is around 55 lbs. Dimensions are 22 1/4" by 12' BY 11' high.
RME 3 band converter VHF-126 for 50,144, and 220 mhz. It converts 6m (48.4 - 54.2), 2m (143.4 - 149.2), and 1-1/4 m (219.4 - 225.2) signals (AM, FM, CW, SSB) to 7.0 mhz. Input from 4 separate antennas are available on the rear chassis of the converter. A short output coax cable hooks directly into the input of the host receiver which is tuned to 7.0 mhz. The converter is 16"x10"x10" and weighs 32 lbs, unboxed.
RME frequency converter - 143.8-148.2mc, 49.5-54.2mc, and 27.0-29.8mc. This 1947 freq. converter was designed for use with a conventional communications type receiver to extend it's range to cover 11, 10, 6, and 2 meter bands. It consists of an rf amplifier, mixer, and high freq. oscillator to convert the very high freqs. received by it to a new freq. on these other bands.
RME-4350 ham band only receiver. Made by rme division of electro voice. It covers the 160-10mtr. amateur bands am & cw. There was an add on ssb detector made for this radio.
RME-6900 ham receiver 160 through 10 meters including 30 Meters (for 10MHz WWV). Built in crystal calibrator.
S-346 vintage RME Speaker. It has metal grill. The inside speaker is an 8" PM8-9.