National Panasonic receivers

Panasonic is one of the most recognized names in consumer electronics in the world. In shortwave circles, Panasonic is best known for their portable models. However, from the mid 1970's to the late 1980's they did offer several table-top digital communications receivers. The RF-4800 and RF-4900 may be best described as analog radios with integrated digital counters. These substantial radios afforded pleasant audio, but lacked stability. Panasonic's current involvement in the worldband market is limited to one digital and one analog portable.

https://www.carousell.com.my/p/1970s-national-panasonic-radio-japan-book-catalogue-rare-1219553054/

The Japanese company Panasonic, a part of the industrial group Matsushita, always concentrated on the home electronics sector, they first entered the shortwave world receiver market around 1965 with the T-100. With its sets, Panasonic often targeted the same customer segment as Sony did, but although the receivers' reception performance was not quite as brilliant, they always stood out because of their favourable price-performance ratio and nevertheless stood out from the mass of cheap Japanese sets thanks to their high quality of workmanship.

http://www.shortwaveradio.ch/doku.php?id=en:panasonic_portabelradios

https://www.radiomuseum.org/dsp_hersteller_detail.cfm?company_id=40

https://www.radiomuseum.org/m/panasonic_j_fr_noindex_1.html

https://hifivintage.eu/fr/

1982-1985

There is an antenna switch on the back that permits the selection from the built-in medium wave antenna to an external medium wave antenna or from a low to a high impedance antenna on shortwave. The filters are somewhat sloppy and stability is marginal, making this model unsuitable for single sideband reception. The audio is quite good yielding pleasant reception of amplitude modulated signals. It is single conversion on medium wave. This model has pleasant audio. The RF-3100 may be more properly classified as a portable than a communications receiver. Variants: Sold outside the U.S.A. as model DR-31 or RFB-30.