The input stage (5842) is a simple common cathode amplifier. If you ignore the three parts (the 10M45 chip, 332 ohm and 1K resistors) where the plate load resistor belongs, it looks like any other common cathode amplifier.

The 417A has become very expensive but the Raytheon made equivalent 5842 is very good and more readily available at a somewhat lower price. Many spud amps have been based on the 5842, both parafeed and conventional SE, about 1Wrms is the maximum output, nestling comfortably between the 71A and the 45 in terms of output power with much less ...

2007年9月21日 · Does anybody have experience of using 6S4P as a driver for 300B SE amp? How are the sonic differences? I know lots of peoples were using 5842 for the driver, but they are expensive and less available.

datasheet 5842 Raytheon (Adobe Acrobat format) The other vantage using the 5842 is the voltage gain that allow to connect the amplifier directly to the DAC chip so we will have only two tubes on the signal.

2018年6月13日 · They use a 5842 or 417A to drive a 45 or 300B. The TSE is a highly regarded amp, and dead quiet. The gain is about right for the 45 and the 5842 is CCS loaded for maximum gain. Its slightly overkill for a 45. Not to mention that the tube that you really want to use is a 417a. The 5842 is the industrial equivalent of Western Electric's 417A.

2024年6月4日 · The significance of all these tubes is that they can be used to make a two stage SE triode amp. They have sufficient Gm and low Rp to deliver power into the grid of the big triode and sufficient Mu to drive a 45 or 2A3 to full output with 1 Vrms input and some will drive a 300B to full output with a 1V input.

I wired external octal sockets and output transformers into a Tubelab SE amplifier. The Tubelab SE uses a 5842 and PowerDrive to generate a very good quality drive signal capable of pushing a 300B well into clipping.

2007年7月10日 · Here is my attempt to design a simple to build SET amp that uses 5842 as the front end, and a 45 to produce a 1 to 2W amp. Hopefully this does not require the use of a preamp. Please provide your thoughts and corrections to any of my assumptions/calculations. - 5842 with 20mA CCS loading. - Grid bias set at around -1.5V.

The input stage (5842) is a simple common cathode amplifier. If you ignore the three parts (the 10M45 chip, 332 ohm and 1K resistors) where the plate load resistor belongs, it looks like any other common cathode amplifier. These 3 parts create a CCS (constant current source).

2024年6月4日 · The output stage uses UNSET technology to make triode curves on a TV sweep tube. The driver stage uses a pentode in UNSET combined with a circuit I designed for squeezing maximum gain (over 1000 V/V) from a pentode in a guitar amp application to generate large drive voltages at near zero distortion. See posts #110 to 119 here: