Keantoken's CFP cap multiplier

[keantoken]

All the TeddyReg versions I've seen will have output impedance much larger than a lytic. The output impedance will behave like a diode or a diode+FET. Apparently, many people like the result. For me it was never the end configuration.

 

[Destroyer OS]

Don't let Keantoken fool you though with his talk of it being a lesser Kmultiplier on my little amp. It's a star even if it's not as bright.

Personally I'm excited to use them in more locations.

 

[TNT]

Anyone has compact boards of the basic Kmultiplier?

I would like to build these.

//

 

[keantoken]

I don't have any compact boards, but I could come up with some, just not immediately.

 

[TNT]

Any layout aspects to be considered?

//

 

[keantoken]

Well it could be square, long and thin, wide and flat, etc. So far I'm tending towards a square layout because that is best electrically, with the TO220 on the edge so it can be bent under the board for direct mount to heatsink or chassis, or left standing with a floating heatsink, or soldered flat with the board.

 

[Destroyer OS]

Here it is, minus two resistors I had to order (my half watts are too big)

 

[keantoken]

Nice. Let us know how it sounds.

 

[MrCRC]

Error on web page "The K Multiplier?"

Hi:

Re:
The K Multiplier

Sorry if this has been mentioned before, but is it the case that this: "This particular transistor has an Hfe of 150 or so, which means our load sees a supply capacitance of about 1500uF."

Should say instead: "... 15000uF." ???

Thanks for clarifying!

 

[TNT]

How close can I place the 2 transistors? Thermal interaction?

//

 

[keantoken]

The circuit will not act up if the transistors are close, and the thermal drift will actually act against voltage sag, although it is not straightforward to predict. I would separate them but don't worry about how close they are.

 

[TNT]

1st trial - positive side. Room for a neg also. See if it smells tomorrow

//

 

[keantoken]

Good looking.

 

[keantoken]

Hi:

Sorry if this has been mentioned before, but is it the case that this: "This particular transistor has an Hfe of 150 or so, which means our load sees a supply capacitance of about 1500uF."

Should say instead: "... 15000uF." ???

Thanks for clarifying!

You're right, I didn't notice that before. It is an important detail. I'll fix it sometime.

 

[TNT]

I get the blink but no output... the 1930, looking from front with text, feet down, form left -> is E B C?

Liiittle hard to understand the spec sheet.

//

 

[keantoken]

The 1930 is BCE looking at the face.

 

[TNT]

Ahhrg - I think it is OK actually - thanks!

So the diode is connected to the 1930 legs rigth behind (red rings). The 337 is connected to the 1930 as the red line. OK?

//

 

[keantoken]

The OnSemi BC337 is CBE. In the KM the 337 collector goes to the 1930 base. I don't know if the pinout for your BC337 might be different.

 

[TNT]

It could differ for same type?

Oj.

 

[keantoken]

I would think not, but I've learned not to make assumptions. It looks the same though:

http://www.jameco.com/Jameco/Products/ProdDS/254810PHILIPS.pdf