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pop when unpluging the input jack

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the cracken

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i can't remember how to stop the pop!! maybe a really small cap??? the hiss is taken out with a resistor to ground but when it pops the small valve amp that i made really really doesn't like it and stops working for a bit then slowly comes back! any ideas??? i can post a circuit diagram if needed!
 
Yes, please, more details. I've designed tube amps with no "pops". My first idea, with no schematic to work with, is that you need a resistor internal to the valve amp that will set the input DC to the level it will seek when you unplug. If this sounds like gibberish, it's because I need a schematic to work with.
 
here it is. o and i forgot its a valve distortion pedal :) that uses 2x jan 6418 raytheon miniature tubes **broken link removed**
 
OK. The way I see it, you need a resistor from the input jack to ground so the input side of the capacitor can not develop a charge.

The source of a pop is always about a sudden change of voltage. I don't know where the charge is coming from, could be as simple as the first capacitor being a bit leaky or the previous device providing a charge, but unplugging allows a sudden discharge as the plug brushes against the shell of the jack...or, you might be using a switching jack that auto-grounds the input when you unplug. If the first cap is grounded through a high resistance, there is nothing to discharge when you unplug.
 
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