![]() In old HP oscillators look for a 204C/D or 651-654 In the big knob tube models don't buy the 200AB as it only goes to 20Hz - 40KHz. There is lots of information on the web about Wien Bridge oscillators including how to build state of the art models or retrofit existing models to current spec needs.įor your needs I'd either pick up an old used one off ebay or build a kit / from scratch and slap a buffer amp behind it. Most won't be happy driving an 8 ohm load. Tube style sig gens will drive up to 30VAC out, but into a 600 Ohm load. Lowest output impedance for sig gens is a rare 50 Ohms, most common is 600. Handheld CW Signal Generator with Tracking Frequency Functionality (24MHz - 6000MHz) £20900 - £39900. For driving speakers directly you are probably going to need a buffer amp. LeTkingok TH1312-20 Audio Sweep Signal Generator Speaker Tester Frequency Sweep Meter 20Hz-20KHz, 0-12.8Vrms. The cleaner you buy the deeper your wallet needs to be. The better oscillators (sine only) use Wein Bridge oscillators. That will get you about 1% distortion at best. The main ic is the XR-2206 which sells for about $6.50 US. Signal generators such as these run over the audio range, typically from about 20 Hz to 20 kHz and more, and are often used as sine wave generators. But you might find a 5AR4 in some of themįunction generator kits start at about $30 US. (201C, 200CD, 200AB, etc) These use more power and have a larger footprint. But there is always the older tube oscillators from HP like the 200 series. Wavetek makes a lot of function generators but the sine waves are derived from square waves with a progressive diode array, so the distortion is not as low as an RC oscillator is.Īll the above are SS. SG-501A, SG-502 & SG505 for very low distortion. Then there's the Tektronix TM-500 series plug-ins that require a mainframe to use. Also a General Radio (Gen Rad) 1310A or B is nice but sine only. A Krohn Hite 5700 meets these requirements. Leader LAG-125 has even more, as does an LAV 191A, but they're more expensive with meters. Leader LAG-120B has everything mentioned. Square waves are also nice in the same instrument. And at least 5 volts RMS output with step & variable attenuation and low distortion. Click to expand.You want full audio coverage and beyond up to at least 100KHz. ![]()
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