Vintage NOS (New Old Stock) four transistor amplifier board.
See our other listings for a 6 piece, and 40 piece lot at DISCOUNTED pricing.This was meant to be part of a record player system. It is a HIGH GAIN 4 transistor amplifier, with provisions for ceramic or crystal phonograph cartridges. This is an excellent item, to use with our earphone output radio kits, to provide loudspeaker volume!
Circuit includes a rectifier diode and filter capacitor, and can be AC or DC powered. The left control is a tone control, and the right is a volume control, with on-off switch. The green wires are the speaker output connections. The black and white wires, connect to the switch on the back of the potentiometer. The connections for signal input and power, are through holes on the board, labeled on bottom.
Requires a 6-11 VAC, or 9-15 VDC power source. (See our other listings for a suitable AC adapter). Use with 8-ohm or higher impedance speakers. These are unused and untested. Handy little amplifier!Comes with 2 page data sheet.
See our other listings for more Radio, Electronic and other RARE and UNIQUE items!The sellermakes no representation of any item(s) sold to be fit for a particular purpose and assumes no liability for its use or misuse. It is assumed that the unit(s) will be installed and operated by qualified personnel. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the item(s).
See our other EXCLUSIVE kits (crystal and tube radios, Morse code oscillator),
that can be used with this item; and our reproduction Knight Allied and Heathkit items.See our other EXCLUSIVE kits (crystal and tube radios, Morse code oscillator),
that can be used with this item; and our reproduction Knight Allied and Heathkit items..