Belcom Liner15, 21MHzを久々にワッチするとEスポで各局聞こえました Ham radio アマチュア無線 

Belcom Liner 15, 21MHz SSB Transceiver シングルコンバージョン、クリスタルフィルター、DDSを使用しないVXOによるアナログ無線機はとてもクリアーに信号が聞こえます。
Liner15 was released on July 20th 1971 as KAPPA 15, the price was 57,000JPY. After a while, the circuitry was slightly improved and the Liner15B(68,500JPY) was released. Freq. range 21.210 to 21.440MHz. 24 channels, each channel can vary +/-5KHz using VXO. SSB mode only, No CW function. IF frequency 7.8MHz, 300-2700Hz, 2.4KHz at -6dB. 17 transistors, 6 FETs, 3 ICs, 43 diodes. 12-16V DC 2.5A.　
Final power amplifier is 2SC1239 for Liner15, 2SC1307 for Liner15B. Final input 20W PEP.
In order to produce 10W output by 2SC1239, Liner15 has 24V DC DC converter inside, but Liner15B has no 24V circuit as 12V was enough driving voltage for new 2SC1307, at the time.. RF amplifier of RX is 2SC710 for Liner15, 3SK45 for Liner15B.
#hamradio #アマチュア無線 #Eスポ