First attempt at mu follower for headphone amp.
2 x 6N6P.
Voltage on bottom anode is 100V - led bias at about 2.0V across it.
18-20mA??
top cathode has 120 ohm resistor (1.9V-16mA) follower by 10K with bootstrap of 220K.
Small bypass cap connected to bottom anode.
Turn is up a little a it distorts quite a bit.
32 ohm phones.
For me the voltages and currents look ok.
Strange.
2 x 6N6P.
Voltage on bottom anode is 100V - led bias at about 2.0V across it.
18-20mA??
top cathode has 120 ohm resistor (1.9V-16mA) follower by 10K with bootstrap of 220K.
Small bypass cap connected to bottom anode.
Turn is up a little a it distorts quite a bit.
32 ohm phones.
For me the voltages and currents look ok.
Strange.
That type used fro MP3 players etc are usually below 50 ohms
Big error on my behalf. I thought they were easier to drive.
Come to think of impedance I couldn't have been so wrong.
Yes small maxell phones.
The SRPP worked great with them. Quite superb. Guess I'll go back to my original design.
Mu followers IMLE in most cases don't drive low impedances very well as compared to say a properly trimmed white cathode follower (WCF) or even SRPP - A properly designed WCF is inherently PP and the SRPP if designed to match the headphone impedance range will also work in PP. Mu followers work great for voltage gain in applications where the load impedance is relatively high.
I drive 32 ohm and lower impedances quite effectively with a pair of 5842 in a WCF - you only need a few mW typically for ear splitting levels with most headphones.
You need to choose a topology designed to deliver power to low impedance loads, the mu follower is great for providing voltage gain, not quite as good providing high current to a load.
I would think the 6N6P would be ideal in a WCF..
I drive 32 ohm and lower impedances quite effectively with a pair of 5842 in a WCF - you only need a few mW typically for ear splitting levels with most headphones.
You need to choose a topology designed to deliver power to low impedance loads, the mu follower is great for providing voltage gain, not quite as good providing high current to a load.
I would think the 6N6P would be ideal in a WCF..
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I would think the 6N6P would be ideal in a WCF..
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Had built one of these but my psu was too noisy. maybe a cascode DN2540 would filter out the noise on the plate.
Sorry no chokes available here.
My SRPP was dead quiet.
My SRPP was dead quiet.
That's because SRPPs rock, and you are a splitter for thinking of using anything else
my wife who listened to my design thought that too. gave her goosebums cuz mark anthony was so sureal.
Time to get a new wife.
AGGGHHHHH!!!!
True story: my sister-in-law was a groupie. Followed them from city to city. Had a child by the lead singer.
So can the child sing then?
Curious people need to know
So can the child sing then?
Curious people need to know
No. Apparently, neither can his biological father (though I'll admit to total ignorance of their music- I'm very pop-averse).
No. Apparently, neither can his biological father (though I'll admit to total ignorance of their music- I'm very pop-averse).
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