4p1l pentode driver

 · Been stable for a while now - 4P1L as pentode, approx. k anode load, G2 set by OA2 from cathode at V. No by-pass cap on cathode resistor. This driver stage suits me in terms of distortion spectrum and was excellent also driving GK at moderate B+.  · Possible drivers, all of which can be used in filament bias which is what I use (no bypass cap) are: 10Y - mu=8 26 - mu=, max 7mA 4P1L - mu=12 2P29L - mu=9 12A - mu=, max 8mA 01A - mu=8, max 4mA These are all best used with a plate choke in my experience. The 01A is a wonderful valve but a bit wimpy as a driver.  · Hallo everybody, time to enjoy the music on our home made tube system. The speakers are real full range I picked up at a thrift store for 4 €, the amplifier didn't cost much either, I had the opts and tubes, the little toroid tranny .

4P1L is a sublime DHT. As shown before it’s one of the most linear valves in triode mode. I built a breadboard in filament bias to test 4P1L as a driver using a MOSFET gyrator in mu-follower mode: My test set can only drive the 4P1L output to 30Vrms and the distortion is only %!. 4P1L PSE Power Amplifier for audio enthusiasts. Built around my favorite vacuum tube (that won’t break your bank) it sounds as good as the most praised DHTs. 4P1L is a better than original equivalent/replica of the RL2 German direct heated pentode. In triode mode, pure class A will deliver clean watts. D3a Pentode Driver. So, I couldn’t wait longer and with the limited time available I put together a rat’s nest testing jig with the following implementation of the D3a pentode as driver: D3a pentode driver with feedback – real life test. A few additions. Firstly, I derived the DC feedback from the mu-output.

Brainfart™, Tоварищ, SE UL pentode amplifier, 6E6P | 4P1L, thinking Pentode driver shoot-out: D3a vs EF vs vs vs 6Z9P vs 6Z11P vs 6E5P vs. 6Н7С / 6N7S W Dual Triode, RF, common cathode – AF Amp (Driver, Splitter, 4П1Л / 4P1L W Pentode, RF – Oscillator, RF Amp, MHz. 1J17B / 1Zh17B Russian miniature pentode Tubes Lot 10 in Consumer Electronics, Driver Tubes · EAF TUNGSRAM Tube NOS in BOX Diode Pentode RF/IF · 4P1L.