There is not much to like or dislike about the amplifier, it is just a classic design that has been around for +50 years and is still built by enthusiasts every day - I wonder how many have been built since it was published in Wireless World. gannaji I bet you cannot look this up in Wikipedia
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There is not much to like or dislike about the amplifier, it is just a classic design that has been around for +50 years and is still built by enthusiasts every day - I wonder how many have been built since it was published in Wireless World. gannaji I bet you cannot look this up in Wikipedia
I can definitely say that I built one.
http://www.diyaudio.com/forums/solid-state/3075-jlh-10-watt-class-amplifier-187.html#post2469219
Hi Guys,
New to this thread. I recently bought the Siliconray (JLH 2005) +- 22Vdc bipolar version but then realized thanks to this forum that the version is way too powerful for my need and heat dissipation.., I then decided to adapt these free PCB for a less powerful version..i.e 9Wrms using +-12Vdc supply with an Iq of 1.5A, see schematics.
Can a good Samaritan have a look at my schematics and confirm if it all makes sense.
I intend to use a switching mode supply.
Thanks a lot.
Eric
New to this thread. I recently bought the Siliconray (JLH 2005) +- 22Vdc bipolar version but then realized thanks to this forum that the version is way too powerful for my need and heat dissipation..
, I then decided to adapt these free PCB for a less powerful version..i.e 9Wrms using +-12Vdc supply with an Iq of 1.5A, see schematics.Can a good Samaritan have a look at my schematics and confirm if it all makes sense.
I intend to use a switching mode supply.
Thanks a lot.
Eric
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Hopefully a switching power supply with +- rails. I have seen cases where using two commercial switching supplies cause interference when their frequencies are not absolutely the same - just a warning.
Otherwise use a single 24V supply and create a virtual ground using two transistors, a diode and two resistors.
Otherwise use a single 24V supply and create a virtual ground using two transistors, a diode and two resistors.
That is the one. I have seen others that uses LM317/337 regulators maybe if you search for virtual earth on DIY audio. But the one above has worked for me for many years in all types of amplifier configs.