More about phone (291)

1-02-1983 | Prelude: class A headphone amplifier elektorfebruary 1983 Prelude: clans A amplifier One of the easiest ways to achieve privacy from everyon...

1-02-1983 | acoustic telephone modem elektor february 1983 The modem described here is a circuit that is designed to send and receive digital informatio...

1-12-1982 | 12-40 — elektor december 1982 home telephone help used (see figure la) may differ depending on the type of tele- phone in use. If your sys...

1-09-1982 | 9-46 — elektor september 1982 a home telephone system a home telephone system up to nine extensions without an exchange The telephone is a...

1-07-1982 | 7-64 - elektor july/august 1982 To many adults it is suprising how much pleasure that the youngest members of the house can derive the phant...

1-11-1981 | 11·32 - elektor november 1981 telephone amplifier makes distant callers loud and clear " Keeping in touch" is easier said than done, despit...

1-07-1981 | P. De Bra low-noise microphone pre-amplifier -amp recording the roar of a lion. No single pre can guarantee a linear amplification of that k...

1-12-1980 | xylophone elektor december 1980 — 12-09 With Christmas practically on the doorstep, small, sound producing circuits become very popular. T...

1-07-1980 | 7-60 elektor july/august 1980 There are many old telephones around which still look and work fine and which are often put up for sale at a r...

1-07-1979 | When considering constructing a `wireless` headphones system, three basic approaches present themselves: a `genuine` r.f. transmitter and re...