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Old 6th January 2009, 12:45 AM   #1
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Default tube rectifier

I am doing comparison between 6D22S and 6CJ3. After a few hours research, but I could not find information about the slow on start of 6CJ3.
6D22S got 30s delay (correct me if I am wrong). The only for 6D22S is the anode cap, which is dangerous for the kids
Anyone have experienced about those tube. Please help me out. Any input will be much appreciated.
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Old 6th January 2009, 06:19 AM   #2
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I'd expect the 6CJ3, which can tolerate 900v heater to cathode voltage, to have a warm-up time at least as long as that of the 6D22S, which tolerates up to 600v. It's the high degree of electrical insulation between heater and cathode that causes the long warm-up time. As you say, the 6D22S gives about 30sec.

BTW, the 6D22S uses the top cap connection for the cathode, not anode. I've used this rectifier and it is rugged! It can tolerate at least 50uF in a cap-input filter and forward voltage drop is only around 10-12v with normal current. It also does pretty well if you can only feed it 5v for the heater, but 6.3v is obviously better.
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Old 6th January 2009, 04:39 PM   #3
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i am trying to stay away with 5AR4 because of 5V heater. i think i will go with 6CJ3.
Ray-moth, thank you so much for your time
Btw, do you know any vendors have GE 6CJ3 beside ebay. I am new to tube equipment.
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Old 6th January 2009, 07:33 PM   #4
Brit01 is offline Brit01  United Kingdom
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I bought my 6X5 from here. Good shop.

I see they have 6CJ3 for 5.13 USD.
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Old 6th January 2009, 10:07 PM   #5
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thank you, Brit01. I just called tubeandmore. i spoke to the sale representative. He told me that they have so many brand in stock, RCA, GE, Raythyon...All of them are the same price. What should i pick?
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Old 25th January 2009, 07:28 AM   #6
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i got my tubes a few days ago. Now i have another question, what is the max cap value if i use the capacitor input? I am thinking about 47uf.
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Old 25th January 2009, 12:19 PM   #7
Tweeker is offline Tweeker  United States
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That should be fine.
Be sure your foil hat has a good low impedance ground.
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