I have an old WA-44C and I was going to use it for one of my science projects. The problem is that when I connected my speaker coil to the line frequency connectors and tried to change the frequency and such, nothing changed. I tried every knob on it and nothing change at all, the only thing that worked was the line frequency power output allowing me to only increase the volume.

I was hoping that some of you might know how i might be able to fix this.

If you are able to please help me. Thank you.

What is a WA-44C. If we have more details, we may be able to assist you.
Manufacturer and description would be useful, as starters.

Colin Lamb

Presume you mean an RCA signal generator type WA-44C.
If all you get on the output connector is 120 Hz hum,
that points to a bad electrolytic capacitor in the power supply.

Look for large tubular capacitors with ratings like 10uF or 20uF 250V
connected to the rectifiers.

If you put a digital multimeter across them, you should only read
a fraction of a volt on the a.c. volt scale,
and maybe 150V on the d.c. volt scale. If you read a high a.c. volt
value, the capacitor has dried out, and no longer works.
They are easy to replace.

73,
Ed Knobloch

Crescendo wrote:
I have an old WA-44C and I was going to use it for one of my science
projects. The problem is that when I connected my speaker coil to the
line frequency connectors and tried to change the frequency and such,
nothing changed. I tried every knob on it and nothing change at all,
the only thing that worked was the line frequency power output allowing
me to only increase the volume.

I was hoping that some of you might know how i might be able to fix
this.

If you are able to please help me. Thank you.

Ah thank you Edward, I'll try your suggestion.

Sorry about forgetting the specifics of the RCA Sine Wave generator and sorry to Colin as well.

Although I do not have either a schematic nor an operations manual, most
generators are not designed to directly operate into the low impedance of a
speaker. The speaker might act like a dead short.

They are usually designed to drive 600 ohms or higher. Some of the very
small speakers may have an impedance of close to 100 ohms and may put out
some audio.

But, as Edward said, the electrolytic capacitors are probably bad. Most of
the old capacitors are aluminum cylinders above the chassis. They can most
easily and inexpensively be replaced by cutting the leads and installing a
similar value capacitor under the chassis. It does not have to be the exact
capacitance and can be a bit more capacitance. New capacitors are much
smaller than older ones.

Good luck, Colin Lamb