6P45S output beam tetrode. Equivalent to the EL / 6KG6. Made by Svetlana. tubes store. Menu: Magnum SE. Magnum Single-Ended. Schematic by David Wolze. Power W. The Hammond W output transformer (a K, W push-pull. 6P45S = EL = 6KG6 tube. Output tetrode. 6P45S = EL = 6KG6 tube. Output tetrode. Manufacturers: Svetlana, St. Peterburg, Russia In Stock: 0.

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Learn More – opens in a new window or tab International postage and import charges paid to Pitney Bowes Inc.

Mouse over to zoom – Click to enlarge. Before turning on the amplifier for the first time the bias balance potentiometer is adjusted to the middle position and bias voltage adjusted for most 6p45z voltage possible. Sign in for checkout Check out as guest. A constant voltage at the base of a bipolar device translates into a constant current at its collector, given a high beta.

Back to home page Return to top. First the clipping point is found at a 1 kHz sine wave and the output voltage noted down. The fun starts when we look at the AC signal: The first issue was a small part of the signal line in coaxial cable that 645s not shielded.

6P45S / EL / 6KG6 tube – POWER / OUTPUT tubes –

Sellers may be required to accept returns for items that are not as described. I decided to build a prototype without 6p45a PCB so changes was easier to make and there would be room for experiments and complete rebuilds. The amplifier will just have to be driven in a sane manner and never played with maximum input voltage. Add to Watch list.

So massive rounding is expected at 10 and 20 kHz. For additional information, see the Global Shipping Programme terms and conditions – opens in a new window or tab. Next step 6p45w to analyse the noise in a spectrum analyzer. With the PCB facing downwards the capacitors are shielded from all intense heat sources and will only experience the ambient temperature.


6P45S / EL509 / 6KG6 Svetlana Tubes Lot of 2 NEW

All modified in regard to the design of the EL34 amplifier by Claus Byrith. To measure the bandwidth of the amplifier, this is done at half output power of the clipping power. What comes next is a long journey to locate the source of these oscillations. So now we have a self-balancing circuit without the need to hand-select 12AX7s, also a very high impedance current sink in the cathode circuit, and also a form of local feedback within this stage to improve balance.

The wave form with the lowest amplitude tells us that the pin currently connected to the ground clip is the pin connected internally to the outer foil layer in the capacitor.

I added in some good ideas from a user on diyaudio. I think I have some noise issues, but I am also waiting for a new oscilloscope to arrive next month before I can do any serious fault finding again. Suspects of the noise could be the 50 Watt output transformers running at 70 Watt, so maybe bias is set too high or AC balance is not good enough.

I found out that my distortion problems is mainly from overdrive of the input stage, my input sensitivity was as high as 70 mV in for 50 Watt out. This site uses cookies.

Watch list is full. Economy Shipping from outside US. High frequency bypass capacitors, 6p5s 4. Since the 6SN7 driver also operates as a differential amplifier, we may as well employ this same technique there as well, to preserve good balance going into the KT88s. Dear SirMy name is Ajayakumar. August 30, at The first power up and test with signal generator as the amplifier is installed in its enclosure.

Very good balance indeed! Learn More – opens in a new window or tab Any international postage and import charges are paid in part to Pitney Bowes Inc. Have one to sell? The other tests are done at 0. April 27, at Changing the diodes gave a difference in the sound from the switching spikes.


6П45С, Tube 6П45С; Röhre 6П45С ID, Beam Power Tube

The greatest performance gain was however from removing a ground loop, the faster diodes did not have such a dramatic effect, it was hear able, but not on the magnitude of removing the ground loop. Pulling the phase splitter tube out when the parasitic oscillations are running showed that the oscillation kept on going and therefore is located in the circuit of the output tubes and not in the preamplifier, phase splitter or negative feedback.

The resulting -3dB point, half the power, is just above the design goal of Watt output power.

The filter capacitors on the power supply board are mounted on the normal side and all diodes and resistors are mounted on the backside. Please enter a valid postcode. Sorry, your blog cannot share posts by 6pp45s. Take a look at our Returning an item help page for more details. That corresponds to 0.

Learn more – opens in a new window or tab. The two blue wave form screenshots show the test to locate the pin connected to the outer foil layer in the capacitor, the capacitor is simply connected to the signal and ground of the oscilloscope probe and squeezed around with your fingers. Learn More – opens in a new window or tab.

Explanations are written on each screenshot from the oscilloscope. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab. Seems like just the thing….

Hey Istvan Nagy Please do show more about our amplifier, you can upload pictures to the comments here. This helped me reduce distortion to about 0. Redeem your points Conditions for uk nectar points – opens in a new window or tab.