Ul se. Empowering Trust™ 2020-02-03

UniFlow UL SE Aire

Here is a picture of the whole test setup on my bench. Optimization is an act of achieving balance between various factors to best achieve the goals in mind. I believe this to be a good result because it shows that the optimization point of the tube changes proportionally to circuit voltages. Features: UniFlow Superstructure non-metallic construction no rust for total chemical resistance, superior durability and long life. Dual wall unitized construction, all non-metallic corrosion and fire resistant composite fiberglass construction. Para obtener información adicional de los modelos cubiertos ver el: Actividades de seguimiento continuo se realizan periódicamente después de la inspección inicial con una frecuencia de cuatro inspecciones por año.

UL Certification: E249605

For example, at 275v plate voltage, the 18v bias that gives maximum power output also achieves this with only ~2. Although I cannot currently explain the exact phenomenon, I think it is clear that this combination of high plate voltage and high plate dissipation should be avoided. At each plate voltage level it shows a similar trend. These are plate and screen power dissipations verses power output and plate and screen currents verses power output. The Setup The act of deciding how to go about these investigations was not nearly as simple as one might assume. The resistors R sp and R ss are 1.

UL Certification: E249605

Molded one-piece fume chamber with white glass-smooth surface with all coved corners. This plot is the first that actually allows us to begin to make some decisions. Especially if using 7-pin members of the family with a 250v maximum plate voltage. Then I would raise the bias voltage i. The importance of such a plot is that in most instances, the design process comes down to performing trade offs between lowering distortion and raising power. I decided that what I would do is settle on one load transformer and then investigate the operation of the circuit at different plate voltages and bias levels. Unitized construction reduces weight for ease of installation.

Empowering Trust™

A good example of this is the data available for power amplifier tubes. Must be field wired to comply with codes. And finally here is the data I used to plot the optimized operating curves. As each bias was dialed in, the B+ was adjusted to ensure that the plate voltage was maintained very closely. Equipped with Vector AireStream Baffle System to efficiently direct air through the fume chamber.

UniFlow UL SE Aire

Max opening is 50%, 4 panels on 2 tracks, conveniently lift out for equipment set-up or cleaning. He has a passion for tube audio and teaching tube based circuit design to others through participation in tube audio forums and his own website,. Angled Picture Frame Opening the aerodynamic face opening with air foil provides uniform air flow into the fume chamber and thru the Vector AireStream Baffle System. This lack of bias and operation data is the problem which I endeavor to address. For bias adjustment I used a 25W 1 k-ohm rheostat bypassed with a 200 uF capacitor which allowed me to set the bias at each operating point. The abnormally low screen dissipation and current for this point clearly indicates something unusual happening within the field structure of the tube. Must be field wired to comply with codes.

UL

Lower distortion is to the left, higher output power is toward the top. This data demonstrates another interesting trend. Use the heart in search results to mark a trip as a favorite on the start screen. Search travel anywhere and whenever you want Search where you want to travel and find a trip from your current location. The lesson here is to be sure of the limits on the tube you are using when you pick your design points. This power dissipation data is especially important for the 6V6 family because of the two types of tubes available. The first is that the optimum power out is primarily driven by the chosen plate voltage.

Standards Catalog

And if it doesn't look right, there is a good chance that the sonic results will be less than optimum. Optional explosion proof switches, receptacles. All electrical services are U. Above this point on each curve, distortion greatly increases with no meaningful increase in peak output power. But we still don't have the critical data we need outlining the operation of the tube in this configuration. This plot puts them together so we can see exactly how they interrelate.

Standards Catalog

Here is what the data looks like. The following plot shows the total harmonic distortion in percent, verses bias voltage, at each of the chosen plate voltages. I present the data in three different pieces. The other important thing to note is that the optimized bias voltages are somewhat greater than those generally published for pentode operation. The other nice thing about this is that, in most cases, 100 mA of total B+ current is enough to put together a complete stereo amplifier.

UL Certification: E249605

At each plate voltage I varied the bias voltage and collected data on power out in the 8 ohm load , harmonic distortion, plate and screen dissipation, and current levels. I would adjust the B+ voltage to get the value of plate voltage required, choose a bias voltage that was close to max plate dissipation, and then record data on tube operation. There has to be a better way. This data is shown below. Electrical services, exhaust blowers available. In the determination of performance at each point, the peak drive voltage was set equal to smaller of either the bias voltage or the cutoff voltage. All parameters are plotted against the tube operational plate voltage Vp.

UniFlow UL SE Aire

If you travel often you can buy a 30 day ticket. Color choices are pearl white exterior. In the optimization data that follows I have chosen from each plate voltage series, a single bias point which I believe reflects the best tradeoff between peak power out and distortion at that voltage. Unitized construction reduces weight for ease of installation. Frame is of type 304 stainless steel. Overall I consider this a successful endeavor. Update on: 2019-06-26 Requires Android: Android 4.