Why is it that, when it comes to the Klon circuit, misinformation is the norm? Every so-called Klon buffer schematic and layout I have seen on the net is wrong. And every single stand-alone Klon buffer seems to be built using those schematics and layouts. Did it never occur to anyone to cross reference the build docs with the actual Klon schematic?
Let’s talk about the real Klon buffer. It runs off the Klon’s 9v supply, which has a 47uF filter cap and a polarity protection diode to ground. Vref is made with two 27k resistors that form a voltage divider. The output cap is 4.7uF. All the supposed Klon buffer docs and builds use 100ks for the voltage divider, a 1uF output cap, and omit the filter cap and diode from the power supply. Ok, so the end result is the same. You get the same Vref, and the output cap is still large enough to make no real difference. We can live without the extra stuff in the 9v section of the circuit (but it’s a good idea to have them when the circuit is built on its own). Without the specific values, it’s not the Klon buffer. It’s a regular old op-amp buffer.
The first time I ever saw a schematic for a standalone Klon buffer was on Beavis Audio’s site (no longer active, but available cached here: http://web.archive.org/web/20110713081503/http://www.beavisaudio.com/techpages/Buffers/)
I have to assume that either that schematic swapped some parts’ values for more common ones to make it easier to build or that Beavis was looking at another schematic that had. Also, since buffers are typically incorporated into other builds, there’s no reason to include the extra parts stuff on the power section, since whatever you’re building the buffer into would already have that. But all it takes is one incorrect schematic and people are making layouts to share with other DIYers, then enterprising builders take that information and use the word Klon to market their builds, built exactly as the incorrect schematic shows. This tells us that they don’t really know what they’re doing and are more interested in the word ‘Klon’ than finding out if they’re building the right thing.
Here are more Klon buffer docs. All wrong. If you’re going to call it a Klon buffer, at least get the 27k’s and 4.7uF in there.