Audio (Guitar) Power Amplifier, Power Supply Questions

[emerrryjones]

Find The Best Pocket Knife Under $50: Save More Is Gain More

Many of us have come to believe that the only way we can own high-quality pocket knives is to pay for them at the cost of an arm and a leg. The high values generated from these knives’ design, premium material choice and excellent performance often justify their price tags. Luckily, this is not always the case since there are still many good budget options that deserve a place in your best pocket knives collection. You may be wondering how the lower-priced pocket knives fare in order to fulfil their intended purpose and whether they are even worth considering in the first place.

Today, we are briefly showing you the 5 top rated pocket knives that cost under $50. Read on to find out how you can save more money when shopping for the best folding knife for everyday carry.

Opinel No.8 Trekking Knife

• Weight: 1.6 oz.
• Blade length: 3.28”
• Full length: 7.59”
• Blade steel: Carbon steel
• Locking Mechanism: Ring lock

The Opinel No.8 is one of the most popular choices for people who do not want to spend lots of money on a pocket knife. It has a simple design and overall, a lightweight yet very reliable construction. The knife at its full-length is comparable to a small steak knife. The cylindrical-shaped handle is made from beech wood that gives enough of a grip and feels very natural in hand. Meanwhile, the less expensive version of the Opinel No.8 features a carbon steel blade which proves to be efficient for your cutting needs, not to mention a particularly sharp tip for effortless piercing. The lock mechanism on this best-rated pocket knife is a completely safe and secured rotating collar called Virobloc. Because it takes some effort to open the blade with both hands, deployment is slower compared to other top folding knives. The finishing touch on Opinel No.8 is the lanyard to be attached to belt loops.

Kershaw Leek

• Weight: 3.0 oz.
• Blade length: 3.0”
• Full length: 7.0”
• Blade steel: 14C28N
• Locking Mechanism: Frame lock

The name Kershaw has long been known as one of the top manufacturers of pocket knives in the US. The Kershaw Leek is a well-liked best-selling pocket knife model that really stands out. It has a distinctive wharncliffe blade with a straight cutting edge that is perfect for slicing and a fine tip for easy punctures. The blade steel is Sandvik 14C28N which sets the ground for and holds a sharp razor edge for a good amount of time. The standard Kershaw Leek has its handle made from stainless steel with the ergonomics that comfortably place your index finger at the front and lets your palm rest on the swelling part. This is one of the great pocket knives with better deployment owing to Kershaw’s SpeedSafe technology. When you push on the thumb-stud, the blade quickly springs into its locked position. To top it all, the knife has a nice reversible pocket clip and a safety lock to prevent accidental blade deployment.

Spyderco Tenacious

• Weight: 4.0 oz.
• Blade length: 3.4”
• Full length: 7.7”
• Blade steel: 8Cr13Mov
• Locking Mechanism: Liner lock

Most Spyderco pocket knives are ranked as the best pocket knives in the world - high quality pocket knives. Spyderco Tenacious is a more affordable model that inherits the high level of quality passed down from other Spyderco knives. It is a solid option with an aesthetic leaf-shaped blade built from the 8Cr13Mov steel. Its edge is incredibly sharp, and it is also a breeze to sharpen and maintain over time. Like any other Spyderco knife, the thumb-hole on the blade is its signature opening method. You will be delighted to discover that you can flick open the blade in several different ways and it will be locked tightly in place by the Walker liner lock. The Spyderco Tenacious has its handle made of G-10 that feels well-balanced and grippy in hand. The ergonomics feature a rounded spine, a finger choil and a ramp place for your pinkie that offer excellent control over the knife. There is also some jimping where you place your thumb to give you more traction. Last but not least, this knife comes with a pocket clip that can be repositioned for multiple carrying ways.

CRKT Pilar

• Weight: 4.2 oz.
• Blade length: 2.4”
• Full length: 5.9”
• Blade steel: 8Cr13MoV
• Locking Mechanism: Frame lock

A cleaver blade in pocket size is undoubtedly an ambitious dream. If you have been let down by some pocket cleavers before, CRKT Pilar could be the best pocket knife for you. It has a 2.4-inch long sheepfoot blade made of 8Cr13MoV stainless steel to keep it low cost. At first impression, you might yearn for a longer cutting edge but trust us when we say the chunky blade stock provides abundant cutting power to handle more duties than any other blade at this size can normally take on. Although this blade material needs frequent sharpening, it is a durable steel type that hardly ever chips. The blunt tip of the blade does not do much in piercing tasks, and the stout profile might make it clumsy in preparing food, but this knife can handle brute force with much grace and really penetrate into layers. Incorporating a 50/50 finger choil and well-designed sweeping curves, the CRKT Pilar is extremely comfortable in hand and gives you generous leverage on the cutting edge. This knife uses a standard stainless steel frame lock to secure the heavy blade stock while in use.

Gerber FlatIron

• Weight: 5.61 oz.
• Blade length: 3.8″
• Full length: 8.4”
• Blade steel: 7Cr17MoV
• Locking Mechanism: Frame lock

Another good choice of pocket cleaver could very well be the Gerber FlatIron. Gerber has taken a different approach in their take on the cleaver style. The FlatIron’s sturdy blade has a unique shape that goes without a point. In some cases, this design may be safer for when you do the chopping in close proximity to others. Its blade material is 7Cr17MoV steel which quickly becomes dull but is also easy to sharpen. Gerber FlatIron has an amazing sharp edge that handles kitchen tasks as a real cleaver. You may consider an upgrade that features D2 steel blade for higher durability and overall quality. The handle is big and fills a good proportion when held in hand. It has an aluminium or G10 grip panel on one side and a stonewashed aluminium on another with a frame lock and a pocket clip. A large choil increases your grip for more control and leverage to take on heavier tasks. The knife uses the frame lock mechanism which solidly fixes the blade in place. A thumbhole means you have to open the knife using two hands without a speedy opening.

Check This Out: https://thekinglive.com/how-to-sharpen-a-pocket-knife-the-popular-way.html

Above are our picks for the best quality pocket knives that come in a budget-friendly price range under $50. These are nowhere near being the world’s best pocket knives, but we are confident they will deliver decent performance in handling daily tasks without breaking the bank. We hope you have found our best value pocket knives review here helpful and informative. Stay in tune with TheKingLive’s latest updates for more good deals coming right up.

 

[bucks bunny]

You may have a look at ESP site.

 

[Ian Finch]

There is a separate forum here, called "Live Sound > Instruments and amps" for all things to do with musical instruments and their specialised amplifier systems. Just press the "report post" button on the bottom left side of your post and ask a moderator to shift you there. I think you'll get more appropriate responses from others there, with the same interests.

 

[jjasniew]

>I work in industrial automation

So you must know some things, like how to use a DMM, about DIN rail power supplies they have in control cabinets and Ohm's law.

Forget the transformer, what you want is a DC power supply, that provides the required voltage for the amplifier board; unsure what "double 32V ring cattle" even means, maybe +/- 32V? For the size of the power supply - lets forget the "wire the two TDA7293 boards together to generate the 200W of output" idea - let's consider just 100W. Your speakers are 4 ohms. P=I squared X R. Or 100/4 = I squared, so I= 5A. So look for a power supply with this 5A output current rating.

Are you using a pedal board ahead of this amp? Why not put the graphic EQ there, last in-line, as a pedal? That would give a nice op-amp buffered output to drive your line in, where you could use a 10k potentiometer at the amp's input.

Good luck with your build!

 

[JMFahey]

^^^^^^^ excellent suggestions.

Let me add that putting 7294 in parallel will not increase power because that depends on supply voltage (which can´t go too high, I wouldn´t go above +/-40V DC) and speaker impedance which is already fixed.

I suggest 3 options, you decide:

1) get a premade PCB *already* containing 2 x 7294 amps in parallel since you seem to like that.
Power will not "add up" BUT they will share the load and work cooler.

There´s a couple tricks needed when paralleling amps, it´s not straightforward, but the board maker must have already applied them.

Power supply needed will be around +/- 40-42VDC (tops), made with a 2 x 30VAC transformer, 5A , an 8A 200V bridge and 2 x 4700uF 50V capacitors.

2) get a discrete 100-150W amplifier and matching power supply, as suggested by manufacturer.
Double check it´s happy with a 4 ohm load.

3) get a Class D 100-150W amplifier and matching Power Supply which in this case will be an SMPS.
Most are bridged output (BTL) and run from a single supply, something between +32 and +40V DC, whatever PCB maker suggests.

If in doubt, search aroun and ask again about what you found.

Suggestions above about a Preamp, Graphic EQ, etc. , integrated into your pedalboard are spot on.

Or maybe you can get a multi effect module which "does everything" for you and outputs the final signal to be reamplified by your power amp and cabinet.

 

[Bone]

You'd be better off using the TDA7293 which is the same basic amplifier but with a few refinements which make it easier to run in multiple. Look on eBay there are quite a few bare boards and also some with components on.