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Output Transformer - Get hum-free operation when operating in stereo with two amps. . . Article 1718417. . . Your query returned too many records.
. the power tube since the amp has a SS rectifier and no standby switch Cheers Ben Adrian. .
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Reviews online seem to indicate it works about as well as could be expected for an amplifier that costs less than 30, but this is definitely no audiophile gear. . 5 total harmonic. .
Moderators pompeiisneaks, Colossal. . Substituting the external 125 volts, while leaving the filaments powered by the Hammond transformer solved the problem. Most hum heard in an amp powered in the US will be either 60Hz like the incoming AC line voltage, or 120Hz (2 x 60Hz).
Tube guitar amps in general are have high THD and limited bandwidth of perhaps 50hz to 5000hz. Here's a good photo of one, check out the discussion on the Les Paul Forum Now the thousand-pound gorilla's of the Peavey amp world, the tube amps of Lynyrd Skynyrd's golden era; these amps, with their aluminum. . ---. They contain both high voltages and current.
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Either is certainly audible and annoying. So I've had my first tube amp now (Peavey JSX) for a couple weeks after having used solid states for years. 1. It has quite a bit of assorted 60Hz and 120Hz (and other harmonics of 120Hz) noisehum.
The Spirit of 86 uses 12AX7 -> passive EQ section -> EF86, into a phase inverter and a cathode-biased 6L6 pair (which is hardly doing any work). . .
. Hum-complimentary DHT stages If 120Hz hums is a property of Directy Heated Triodes (DHT), how about cancelling the noise of one with the noise of another. 8 Amp.
Hum 120hz. The 120Hz frequency finds its way into other parts of the amp and is heard as buzz. There's a LOT that goes into this, more than can be properly explained in a post. If I dime the volume, there is an itty-bitty increase in hum volume between 9 and 10.
Below is the resulting distortion spectrum at 1W into 8 Ohms. Tube amp hum problem. The problem turned out to be that the interstage transformer was inductively coupling hum from the power transformer. The 120Hz frequency finds its way into other parts of the amp and is heard as buzz.
. . It has quite a bit of assorted 60Hz and 120Hz (and other harmonics of 120Hz) noisehum.
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