Note
Announced QST, Aug 1964, p. 107. Will be shown at Wescon in LA.
QST, Oct 1964, inside back cover.
QST, Feb 1965, p. 105.
QST, Apr 1965 p. 129.
QST, Feb 1966, back cover.
CQ, Jun 1968, p. 121.
QST, May 1969, p. 127.
Hamtronics ad: "National is back." First seen QST, Nov 1976, p. 131.
QST, Jan 1977, p. 147.
The HRO-500 makes a comeback? Along with NCX-1000 and NCL-2000.
The ads ran until May 1977.
"P" version is portable.
Three decades after the production of the first HRO model, National introduced their HR0-500. Only the trademark PW dial remained as a constant. Everything else about the famous receiver line had changed. The HR0-500 was all-solid-state and synthesized. It covered 5 kHz-30 MHz in sixty 500 kHz bands. The VFO's tuning rate was identical on all bands. A tunable six-pole filter provided selectivity bandwidths of 0.5, 2.5, 5.0, and 8.0 kHz. Passband tuning was used on the 0.5 and 2.5 kHz positions. Its rejection tuning featured a 60 dB notch. It operated from either 115/230 VAG or 12 VDC power; $1295.00, 1964. (1)
References
Brief description. Popular Electronics, Jan 1965, p. 26.
Brief description. Electronics World, Feb 1965, p. 94.
Review. Popular Electronics, Aug 1965 p .45.
See National's notes: QST, Oct 1964, p. 111.
See National's notes: QST, Nov 1964, p. 87.
See National's notes: QST, Dec 1964, p. 115.
See National's notes: QST, Feb 1965, p. 93.
See National's notes: QST, Apr 1965, p. 109.
See National's notes: QST, Jun 1965, p. 119.
See National's notes: QST, Sep 1965, p. 113.
See National's notes: QST, Jan 1966, p. 99.
See National's notes: QST, May 1966, p. 105.
See National's notes: QST, Aug 1966, p. 97.
