I report for almost a year's work. Labor is collective.
Series of amplifiers Cyclothers of different configurations. In order to fully utilize the elemental base of germanium semiconductors.
The power band was able to extend from 30-50 to 600 kHz.
Power up to 36 watts. Maybe more.
Amplifiers are very stable.
Stable resting current. Stable output voltage, zero.
Two of the four diodes (VD1-4) are temperature sensors. Placed on radiators
Meander at 100 kHz.
Series of amplifiers Cyclothers of different configurations. In order to fully utilize the elemental base of germanium semiconductors.
The power band was able to extend from 30-50 to 600 kHz.
Power up to 36 watts. Maybe more.
Amplifiers are very stable.
Stable resting current. Stable output voltage, zero.
Two of the four diodes (VD1-4) are temperature sensors. Placed on radiators
Meander at 100 kHz.
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The biggest curiosity is the Cyclotron with a single transistor on the output.
Sounds like one hand clapping...
Sounds like one hand clapping...
The best sound option is currently.
Feature of germanium transistors - increase of gain with increasing current.
On the graph, the dependence of the "beta" indicator on current. For 1T910AD
This also applies to other transistors of the circuit.
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The previous version of the scheme, more simple. 1kHz, 10kHz, 20kHz.
Sinus: 0dB - 70kHz, -3db - 180kHz.
Sinus: 0dB - 70kHz, -3db - 180kHz.
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Very nice job ! With MosFet transistors the result should be interesting too, since there is no gain drop at high intensity, and the frequency response is very wide.
Yes, with lateral MOSFET.
Suggestion:
JFET-bipolar cascode input, grounded-base driver, lateral MOSFET output.
I soldered variant D3. Frequency respouse: 17 Hz - 260 kHz (-3 dB). Current - 250 mA. Meander at 100 kHz.
http://devicemusic.ucoz.ru/_fr/2/s0060778.jpg
http://devicemusic.ucoz.ru/_fr/2/s0060778.jpg
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I tried to put of darlington TIP147, everything was OK.
clipping sine wave - TIP147:
http://devicemusic.ucoz.ru/_fr/2/s5586742.jpg
Current - 200 mA.
clipping sine wave - TIP147:
http://devicemusic.ucoz.ru/_fr/2/s5586742.jpg
Current - 200 mA.
do you have the schematic that u used with 2n3055 i would like to see that
i would build it it even though it has so many power supplies
Svjatoslav has a circuit of Sziklai.
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- The Germanium-only circlotrons. Powerful, wideband.