Hi i was trying to sim the famous JC2 by Mr Curl and failed
Changing some parts i have ended with the circuit attached Now it reduces the input voltage of about half
Is there a way of reaching unity gain ?
the idea is using it as a buffer maybe with 2 x 9V batteries
Thank you very much to all
Changing some parts i have ended with the circuit attached Now it reduces the input voltage of about half
Is there a way of reaching unity gain ?
the idea is using it as a buffer maybe with 2 x 9V batteries
Thank you very much to all
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The thread starter presumably assumed that everyone has access to LTSpice.
@ginetto61 Could you add a .png file of the schematic?
@ginetto61 Could you add a .png file of the schematic?
Hi yes sorry i did not know about the schematic but i found it on the web here https://www.diyaudio.com/community/attachments/jc2schematics-jpg.509235/
I am sure there is something wrong here I was trying to use the original line stage as a buffer I do not need gain Also because with gain comes also pain
I have to be honest I dont know how to expect The gain is slightly less than one Just one question When the dissipation of a transistor is almost zero it means that the circuit cannot work ? in the order of picoW 🤔
I am sure there is something wrong here I was trying to use the original line stage as a buffer I do not need gain Also because with gain comes also pain
Hi to drive a power amp stage after an attenuator
I am very sorry i did not want to do something against the rule I thought that the circuit was pubblic domain ? the link is here
https://www.diyaudio.com/community/attachments/jc2schematics-jpg.509235/
it is called output amplifier module
as i dont need gain i was trying to wire it as a buffer Maybe changing voltages and values ...
Hi sorry if i am trivial but i am noticing that to have a power amp with high sensitivity and high input impedance simplifies the job of a driving buffer immensely
I would say that high sensitivity is more helpful than high impedance
In the past i ruined a small amp trying to reduce its gain just changing the feedback resistor (not the one to the ground)
The idea was to use it like a power buffer (power amp with low Vgain) with an headphone amplifier instead of a line preamp
Then i could have used a pair of headphones to select the HP amp on the basis of its sound Even a tube one (my feeling is that headphones are much more revealing than a normal hifi system with speakers)
Now i have changed my approach and i am moving in the opposite direction quite convinced that when a buffer is asked to push only let's say 500mV in a decently high impedance (in this case 5kohm) the result can be very good indeed in terms of THD at least
I would say that high sensitivity is more helpful than high impedance
In the past i ruined a small amp trying to reduce its gain just changing the feedback resistor (not the one to the ground)
The idea was to use it like a power buffer (power amp with low Vgain) with an headphone amplifier instead of a line preamp
Then i could have used a pair of headphones to select the HP amp on the basis of its sound Even a tube one (my feeling is that headphones are much more revealing than a normal hifi system with speakers)
Now i have changed my approach and i am moving in the opposite direction quite convinced that when a buffer is asked to push only let's say 500mV in a decently high impedance (in this case 5kohm) the result can be very good indeed in terms of THD at least
Attachments
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