Renovating a low-power amplifier using a tube radio

The resistor can be a metal film or carbon film resistor of about 2W. The capacitor can be paper or polypropylene capacitors with a withstand voltage of 400V
. Capacitors with different media can be used to obtain different tones. Although the old-fashioned paper capacitors have no polarity,
the end marked with a black circle is the ground terminal, which has a shielding effect. The electron tube can be selected from the "Shuguang" brand produced in Changsha, Hunan, and its performance is very worrying. 9
The output transformer can be purchased at the local radio and television department. Yes, you can also make your own.
    The iron core can be GE12×18, the stack thickness is 18mm, the primary winding is 2854 turns, and the secondary winding is 114 turns.} The wire diameter is
<PO*1mm for the primary; Ga. 54mm; if the speaker is 4,fl, the transformer secondary has 8 6 turns. Most live speakers
have a nominal impedance of 8S1, so the transformer should be wound with an 80 tap to allow flexible speaker configuration. The transformers of other old tube radios can also be removed
.