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previous: DanF GW / Bruce – The voltages were sur... -- 7/30/2000 9:06 PM

Re: 448VDC on the plate of a 6V6 (using a 6X5 rectifier tube)

7/30/2000 10:07 PM
Cole	Re: 448VDC on the plate of a 6V6 (using a 6X5 rectifier tube) The voltages seem kind of high - with the cathode resistor at 312 ohms, the idle current is 16VDC/.312k = 51ma, making for plate dissipation of (370-16)VDC*.051A = 18W (someone correct my math or formulas if I'm wrong). Kind of high for a 6V6, should be around 11-15W. The plate voltage will be different if you adjust the cathode resistor, since that's what sets the idle of the tube.

7/30/2000 10:07 PM

Cole

Re: 448VDC on the plate of a 6V6 (using a 6X5 rectifier tube)

The voltages seem kind of high - with the cathode resistor at 312 ohms, the idle current is 16VDC/.312k = 51ma, making for plate dissipation of (370-16)VDC*.051A = 18W (someone correct my math or formulas if I'm wrong). Kind of high for a 6V6, should be around 11-15W.

The plate voltage will be different if you adjust the cathode resistor, since that's what sets the idle of the tube.

Replies:

DanF Hi Cole – So changing the cathode r... -- 7/31/2000 4:38 AM