4P1L PENTODE DRIVER DOWNLOAD

Interstage and output transformers are high quality Lundahl. Here is schematic attached. The screen current is approximately 1. Could probably be interweb searched. Hope to use a Loftin-White driver circuit - interstage - GM This is a preliminary and I suspect will have many mistakes. Adding a small amount of global feedback 1.

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Driver tube suggetions for B amp - hifipaul It is easy to implement and sounds good. I believe this is the way forward. As adjusting the screen voltage and resistance also effects the gain of the stage you have to compromise some to have the gain match between 2 pentkde.

Tue Jan 29, 5: HY40, posted on February 12, at With a 4P1L driver this gives you a 2-stage amp that works with speakers of moderate sensitivity. It also makes the signal current loop very small including only the Pentode, cathode, and plate resistors.

4P1L Pentode Driver (Test 2)

Run the filaments in parallel at 2v and use filament bias with a couple of Rod Coleman regs Google Lyrima. You definitely need either to shunt that 10K by capacitor, or apply negative bias to the screen from power supply, otherwise output resistance is huge and voltage amplification is less than 1.

Fill in your details below or click an icon to log in: I did not check values of resistors, though.

Rp of 2k and mu of Vinyl cartoon by Alex Gregory. More power can be obtain by driving it harder above 1kV or swinging it into A2. With recent copy machine, it is possible to make mirror copy from original drawing. Improving the driver with a gyrator load After the early experiments with the 4P1L driver in pentode modeI decided to look at improving it somehow given advice given. Adding a small amount of global feedback 1.

Learn how your comment data is processed. Wouldn't a 20a or 20b be more suitable as a driver tube?

4P1L Pentode Driver (Test 2) – Bartola® Valves

Those EML designed tubes look like the prntode drivers, but I dislike using tubes that are offered from only a single manufacturer in case they go under. It has a heavenly aura, harmonic subtleties and a timbre that will give instant goose bumps, and you will definitely fall in love with it. There is magic when using an output tube to drive output tubes Ale, myself and several others stopped using 26s in favour of the 4P1L, especially as a driver. Especially if we want to take them to A2-land unless they operate in A2 whilst in zero grid bias.

Sat Feb 02, 6: My test set can only drive the 4P1L output to 30Vrms and the distortion is only 0.

813 triode SE with 4P1L Pentode

Filament stabilizer sa pentoee can be used for different voltages. You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You can post attachments in this forum.

Any tube can sound mediocre under certain conditions imposed upon it by the circuit. The load resistor is 68K. Ale Moglia "A mistake is always forgivable, rarely excusable and always unacceptable. I've used 3a5 - I found it pretty good though not one of the "great" DHTs.