Yeah so bassicaly i e-mailed Joe.
Asking for a solution on using the Hybrid as a headphone amp.
Then later found out this Gyraf schematic: http://www.gyraf.dk/gy_pd/hpamp/HP-Amp.pdf
It looks like the hybrid but with some components more in the surrounding circuit...
I'm pretty sure that with some xperimenting and tweaking this will probably work just fine...
The only thing is that 1 channel of headphones will need 2 Hybrid
Gyraf Headphone using HYbrid module...
Moderator: Joe Malone
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Re: Gyraf Headphone using HYbrid module...
Similar, yeah - you could use the Gyraf front end (C1, C2, R1, R2 and the volume P1) in front of a Hybrid and that should be fine. Both designs use high output transistors to drive the outputs.Trinity wrote:It looks like the hybrid but with some components more in the surrounding circuit...
Lost me here. By "1 channel of headphones" do you mean a L and R signal? Then yes, you'll need two hybrids to do that, just as the Gyraf schematic shows only 1 channel and you'd need to repeat it for the other. If you mean 2 hybrids each for L and R (ie 4 in total), why do you say that?The only thing is that 1 channel of headphones will need 2 Hybrid
Chris P
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I do lots of things. I believe eclectic skills are best.
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I do lots of things. I believe eclectic skills are best.
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Re: Gyraf Headphone using HYbrid module...
What i meant is that each pair of headphones will need 2 hybrid for stereo.
altought its not stated on any thread for gyraf headphone amp....
altought its not stated on any thread for gyraf headphone amp....
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Re: Gyraf Headphone using HYbrid module...
The Gyraf schematic to which you link in your first post states that you need to repeat the amplifier circuit for the other channel. So the Gyraf design uses two quasi-hybrids as well.
I suppose the question is why go for the hybrid rather than just build it as per the Gyraf schematic. There main reasons would be -
(1) the JLM Hybrid offers a servo circuit for the opamp and the choice of class A or class A/B operation
(2) buying 2 hybrids gets you parts and circuit board without having to do much running around.
It would be slightly more expensive than building it from scratch yourself (assuming your build all goes well), but much quicker.
I suppose the question is why go for the hybrid rather than just build it as per the Gyraf schematic. There main reasons would be -
(1) the JLM Hybrid offers a servo circuit for the opamp and the choice of class A or class A/B operation
(2) buying 2 hybrids gets you parts and circuit board without having to do much running around.
It would be slightly more expensive than building it from scratch yourself (assuming your build all goes well), but much quicker.
Chris P
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I do lots of things. I believe eclectic skills are best.
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I do lots of things. I believe eclectic skills are best.
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Re: Gyraf Headphone using HYbrid module...
Below is a similair circuit I drew for someone who wanted summing mixer and a headphone amp using BAD PCB's and Hybrids. For just a stereo headphone amp you can use 2 x BA PCB with no input transformers and use 2 capacitors and resistors to make a electronic balanced input headphone amp.
Joe
JLM Audio
Capturing Audio without Injury
JLM Audio
Capturing Audio without Injury