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Well......If you work out the formula to find the plate impedance of the toob you can use a resistor from anode to chassis with an antenna analyzer or even a radio with an swr meter to get the tank circuit right before you ever power up the amp. The same can be done with the input tune. The last 8877 conversion I did was almost tuned up before I ever plugged it in. The input match was spot on on the first round.

I don't remember the formula off the top of my head but will share it later.

[QUOTE="543_Dallas, post: 673203, member: 21044"] Well......If you work out the formula to find the plate impedance of the toob you can use a resistor from anode to chassis with an antenna analyzer or even a radio with an swr meter to get the tank circuit right before you ever power up the amp. The same can be done with the input tune. The last 8877 conversion I did was almost tuned up before I ever plugged it in. The input match was spot on on the first round. I don't remember the formula off the top of my head but will share it later. [/QUOTE]

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