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Old 3rd October 2011, 07:24 PM   #1051
merlin2069er is offline merlin2069er  Canada
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Default Cool!

I've got enough left over parts from my F5 and B1 builds to give this a try.
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Old 7th October 2011, 06:05 PM   #1052
Roscoe Primrose is offline Roscoe Primrose  United States
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With the gain of the original BOZJ with the 2SK170 as high as it is, and the potential for overload so high, I'm surprised no one has suggested a shunt volume control... Replacing the 25K input pot with a 20K resistor in series with a 5K pot would give a much larger useful range on the pot...

Now, where did I put those J310s...

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Old 7th October 2011, 07:24 PM   #1053
carpenter is offline carpenter  United States
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Quote:
Originally Posted by Roscoe Primrose View Post
With the gain of the original BOZJ with the 2SK170 as high as it is, and the potential for overload so high, I'm surprised no one has suggested a shunt volume control... Replacing the 25K input pot with a 20K resistor in series with a 5K pot would give a much larger useful range on the pot...

Now, where did I put those J310s...

Roscoe
How do you like those J310s? I purchased a bag of them years ago and plan on using them in an upcoming project -- 300 watt class A in a choke loaded, differential follower configuration.
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Old 7th October 2011, 10:22 PM   #1054
Zen Mod is offline Zen Mod  Serbia
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......J310s......
yummie ......


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Old 7th October 2011, 11:05 PM   #1055
carpenter is offline carpenter  United States
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What'll be yummie is a 300 watt class a amp -- assuming I can pull it off. What's the worst that can happen, black out the West coast of the US?
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Old 8th October 2011, 12:55 AM   #1056
Roscoe Primrose is offline Roscoe Primrose  United States
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How do you like those J310s? I purchased a bag of them years ago and plan on using them in an upcoming project -- 300 watt class A in a choke loaded, differential follower configuration.
300W Class A, that's going to take a LOT of J310s

I haven't used them for audio yet, I bought a bunch for RF work, now I just need to find the darn things....

Roscoe
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Old 8th October 2011, 06:16 AM   #1057
carpenter is offline carpenter  United States
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Ha, the 310s are for the input only.
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Old 8th October 2011, 10:15 AM   #1058
ramallo is offline ramallo  Europe
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I tried the jboz with the 310 with bad results, more distortion and an hf oscillation (Maybe I did some things wrong)
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Old 8th October 2011, 12:50 PM   #1059
carpenter is offline carpenter  United States
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I tried the jboz with the 310 with bad results, more distortion and an hf oscillation (Maybe I did some things wrong)
Do you happen to have the exact schematic you used?
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Old 8th October 2011, 01:44 PM   #1060
runy is offline runy  Thailand
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