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Baby of Camel: All-directly-Heated Pushpull Amp-Spy Photos- Project a Camel is a take-no-prisoners DHT PP based on Lynn Olson Aurora topology. Unfortunately, I'm stuck waiting for Lundahl transformers ( three months that famous Nordic attention to detail one turn a day). Well, before Camel is born, there was his baby, sans interstage transformers, yet with all DHT stages ( all tubes from Svetlana 1970-s). OK, the input/splitter __ Contact klausmobile @ yahoo.Com Inductive Pulse Receiver (175Khz)- This circuit is discussed in more detail in the Experimenters Journal. The receiver’s six inch diameter coil detects the ring signal from the above transmitter and use a single NPN transistor to provided enough amplification for the signal to be easily viewed on an oscilloscope . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000 |
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Low-power CMOS
oscillator has push-pull output- 04/01/04 EDN Design Ideas: Digital oscillators often generate TTL- or CMOS
-level outputs, referred to ground. Generating a symmetric bipolar output with respect to ground presents a challenge. In this design, four 1.5V flashlight cells create ±3V voltage sources, and the midpoint of cells acts as the ground reference (Figure 1). The oscillator at the input, based on the R1C1 time constant, generates Design by Shyam Sunder Tiwari, Sensors Technology Private Ltd, Gwalior, India Push-Pull 5687 Amp- This stereo amp will give you 4-8W/ch of zero feedback triode power for less than a pair of Chinese 300B's if you know where to shop. For those of you who are unfamiliar with this lil' tube here's the poop. The 5687 is a 9-pin miniature twin triode ( a la 12ax7, 12au7, etc - but with different pin-out). Its specs are quite interesting __ Designed by Robert Danielak
Push-Pull 845- schematic only __ Designed by puechmor @ mygale.org
Pushpull Class a 2a3 Stereo Amp- The input stage is comprised of a both halves of a 6SL7 octal dual hi-mu triode in a differential amp configuration with a 1ma constant current cathode load. I'm using field-effect ( constant-current) diodes for simplicity. the diff amp approach was chosen for good power supply rejection, ease of balancing, good gain, and ease of application of *feedback*, if desired ( hey, i like to keep an open mind). It also takes care of phase-splitting right up front. Note: I've returned the constant current diode cathode to -9V instead of ground in order to avoid the non-linearities about the pinch-off region ( Vpo ~= 1.5V) __ Designed by Bob. D. @ robert.m.danielak @ lmco.com
Pushpull Class a Amp using Type 5687 Dual Triodes- This stereo amp will give you 4-8W/ch of zero feedback triode power for less than a pair of Chinese 300B's if you know where to shop. For those of you who are unfamiliar with this lil' tube here's the poop. The 5687 is a 9-pin miniature twin triode ( a la 12ax7, 12au7, etc - but with different pin-out). Its specs are quite interesting __ Designed by Bob. D. @ robert.m.danielak @ lmco.com
Push-Pull Complementary Power MOSFET Driver- Circuit Ideas for Designers App Note__ Advanced Linear Devices, Inc
Push-pull driver provides isolated 5V at 1A- 03-Mar-00 EDN Design Ideas: The circuit in Figure 1 converts a regulated 5V input to an isolated 5V output with 1A current-output capability. IC1, a pushpull transformer driver, powers a pair of cross-coupled power MOSFETs in a flipflop-like configuration. Note PDF contains several circuits, scroll to find this one. Design by Ron Young, Maxim Integrated Products, Sunnyvale, CA |
