RE: Same question as above!? Did you go and read what I wrote about the mods we did

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Your description was about the driver stage and the power supply.

The driver stage is not going to be the dominant problem with a cathode bias amp going from A to B, the cathode resistor/capacitor will be.

For the power supply, you really have two options.

1. A real choke input filter, which would provide adequate regulation for the wide range of currents demanded.

2. Tie the B+ feed to the output transformers from the first node of the power supply, which would minimize voltage changes from filtering impedance, but still isn't as good as above.

Do note that these power supply mods assume that you know to run the amp in fixed bias in the first place. With cathode bias, you need to stick to class A.

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Topic - Behaviour in overload of PP EL84M cathode bias amp? How to examine for that? - Timbo in Oz 16:27:15 09/04/14 (8)

RE: Behaviour in overload of PP EL84M cathode bias amp? How to examine for that? - Triode_Kingdom 00:05:50 09/06/14 (4)

i) Have you read the description of the modifications we did?? - Timbo in Oz 04:06:26 09/06/14 (3)

RE: i) Have you read the description of the modifications we did?? - Triode_Kingdom 08:47:56 09/06/14 (2)

RE: i) Have you read the description of the modifications we did?? - Timbo in Oz 13:26:42 09/06/14 (1)

RE: i) Have you read the description of the modifications we did?? - Triode_Kingdom 00:02:58 09/07/14 (0)

RE: Behaviour in overload of PP EL84M cathode bias amp? How to examine for that? - Caucasian Blackplate 20:45:15 09/04/14 (2)

Same question as above!? Did you go and read what I wrote about the mods we did - Timbo in Oz 04:23:13 09/06/14 (1)

RE: Same question as above!? Did you go and read what I wrote about the mods we did - Caucasian Blackplate 10:07:51 09/06/14 (0)

Follow Ups

RE: Same question as above!? Did you go and read what I wrote about the mods we did - Caucasian Blackplate 10:07:51 09/06/14 (0)

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