Hello forum members, rookie here needs help please.
I have inherited this little amp, and need some help. I have attached the schematic for this amp for your assistance.
1: No pre-amp is needed, correct?
2: I assume I connect my line in from ipod, mp3 etc. (or pre-amp) to the Phono Cart input socket, left and right to either 2 and 4 pins, grounds to 1 and 3 pins?
3. speaker hook up? Yellow, Green, Black wires from Transformer.
I can use either 6 Ohm or 8 Ohm bookshelf speakers.
Wire diagram please......
thanks in advance for your assistance.
Stu
I have inherited this little amp, and need some help. I have attached the schematic for this amp for your assistance.
1: No pre-amp is needed, correct?
2: I assume I connect my line in from ipod, mp3 etc. (or pre-amp) to the Phono Cart input socket, left and right to either 2 and 4 pins, grounds to 1 and 3 pins?
3. speaker hook up? Yellow, Green, Black wires from Transformer.
I can use either 6 Ohm or 8 Ohm bookshelf speakers.
Wire diagram please......
thanks in advance for your assistance.
Stu
Gain may be a bit low for iPod, but CD player would have plenty of gain. Bass conrol will have no effect (designed to work only with crystal/ceramic phono cartridge). I'd install some RCA jacks for inputs.
Green wire is usually 8 Ohms, yellow 4 Ohms. Parts list would show speaker impedance, if you have it.
Green wire is usually 8 Ohms, yellow 4 Ohms. Parts list would show speaker impedance, if you have it.
1. Yes, for line-level inputs no preamp is needed.
2. Yes.
3. Not sure. It looks like Yellow and Black are the intended stereo outputs, but these could be for 3 ohm speakers. If so, Green and Black might suit 6 or 8 ohms better. Maybe someone else can help.
Note that this amp was intended for a ceramic pickup cartridge. It makes use of the fact that these looked electrically like a capacitor, so it has inter-channel mixing (to reduce vertical rumble) and resistive loading to effect a bass control. Personally, I would remove the tone controls but you can't simply cut them out as the bass control provides grid bias for the first stage.
This won't be hi-fi, but it might make a pleasant noise.
2. Yes.
3. Not sure. It looks like Yellow and Black are the intended stereo outputs, but these could be for 3 ohm speakers. If so, Green and Black might suit 6 or 8 ohms better. Maybe someone else can help.
Note that this amp was intended for a ceramic pickup cartridge. It makes use of the fact that these looked electrically like a capacitor, so it has inter-channel mixing (to reduce vertical rumble) and resistive loading to effect a bass control. Personally, I would remove the tone controls but you can't simply cut them out as the bass control provides grid bias for the first stage.
This won't be hi-fi, but it might make a pleasant noise.
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