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Old 16th November 2006, 03:28 PM   #1
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Default bypass switch for preamp

Once my Aikido comes together, it'll sit between inputs from TV, radio, DVD, video, and CD-player and my SS power amp.

Now, it could be that tube life is likely to be so long that it isn't an issue to run all of the above through the Aikido. However, if tube life is relatively finite, then I would like to be able to simply switch some inputs (such as radio, TV, and video) to bypass the preamp.

So, how could I wire a bypass switch for ALL inputs? Now the other difficulty is that the Aikido will use a 100K pot, while my AKSA power-amp prefers 47K input impedance. So the bypass switch would also need to switch inputs to my Alps pot.

Also, would I need to switch the signal GNDS also? Or would this not matter? At present, I have a single GND bus and do not get any cross-talk. Maybe a push-on-push-off button would work well for a bypass.

Any ideas????

Charlie
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Old 16th November 2006, 06:13 PM   #2
SY is offline SY  United States
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If you run small-signal tubes conservatively, they'll last a very, very, very long time. Take the money that you'd invest in the bypass switch (it will not be cheap if you want a high quality one) and grab some spare tubes. Keep them in your refrigerator for the day, many years from now, that you will need them.
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Old 16th November 2006, 07:56 PM   #3
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Sy,

Thank-you for the reply. I'll invest switch money in spare tubes!!!!


Charlie
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