Hi All,
I've just put together a SE modified 5F2-A. It's not working right. There are many questions that I will be asking, so please don't get annoyed with me
First things first though, the AC secondaries from the PT are significantly clipped on both top and bottom of the waveform when viewed on a CRO.
The PT is a new AnTek AN-IT250, with 500V CT and 2 * 6.3V secondaries. All are used in the circuit. With no valves inserted I am getting 261VAC from each of the two HT to CT, and 522VAC HT to HT. Heaters I am getting 6.2VAC on both. Slightly low but I didn't think anything of it until I put the CRO on them!
The only load operating without the valves is: 470K bleeder resistors across each of the filter caps, and 100 ohm artificial centre tap resistors from each of the output valve heater pins to it's cathode.
Does anyone know what's going on here?
Thanks for any help,
James
I've just put together a SE modified 5F2-A. It's not working right. There are many questions that I will be asking, so please don't get annoyed with me
First things first though, the AC secondaries from the PT are significantly clipped on both top and bottom of the waveform when viewed on a CRO.
The PT is a new AnTek AN-IT250, with 500V CT and 2 * 6.3V secondaries. All are used in the circuit. With no valves inserted I am getting 261VAC from each of the two HT to CT, and 522VAC HT to HT. Heaters I am getting 6.2VAC on both. Slightly low but I didn't think anything of it until I put the CRO on them!
The only load operating without the valves is: 470K bleeder resistors across each of the filter caps, and 100 ohm artificial centre tap resistors from each of the output valve heater pins to it's cathode.
Does anyone know what's going on here?
Thanks for any help,
James
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