[bertdw]

The other day I thought I'd measure the input impedance of my Khartago Mono amps.  I wanted a more specific number than "greater than 10K."  After turning the unit off and waiting 10 minutes, I connected my Simpson 260 to the input.  It read 10K at first, then slowly climbed to above 20K, like a capacitor charging.  I can't imagine a cap that large connected to the input, so I can't imagine what's going on.  Does anyone have any ideas?  Thanks!

[klaus@odyssey]

Yes,  it is 22 K...actually,  22.1K to be precise

[bertdw]

Thank you Klaus!

[jeffreybehr]

The other day I thought I'd measure the input impedance of my Khartago Mono amps.  I wanted a more specific number than "greater than 10K."  After turning the unit off and waiting 10 minutes, I connected my Simpson 260 to the input.  It read 10K at first, then slowly climbed to above 20K, like a capacitor charging.  I can't imagine a cap that large connected to the input, so I can't imagine what's going on.  Does anyone have any ideas?  Thanks!

If one gets a nonstable resistance number when doing this, the input probably is filtered with a capacitor in series, which is not correctly measured with a simple Ohms-meter.

[bertdw]

If there was a DC blocking cap at the input, the reading would climb to near infinity, it wouldn't stop at 20k. Unless it was a very leaky cap!