Another Class A ( BJT ) Jean Hiraga !

On the bench this day, I have a Jean Hiraga amplifier its a amplifier with 30watt RMS /8ohm output. HOWEVER mine’s a bit different. Running higher bias and dual regulated powersupply setup. Achieving 60watts RMS output @ 35V rails along with 22v super regulated front end circuit.

IN the pictures below you can see before and after pictures the red board on the side is the regulator circuit for the front end of the amplifier circuit.

Testing Aleph Turbo SMD version 1.2

After months and months of testing my Aleph Turbo Class “A” amplifier. Went through a few revisions and test setups. No smoke on any of them BUT I did have a few mistakes on the layout’s & wrong SMD pad sizes, live and learn.

One thing learning about SMD pcb designing is its harder to do. Why ? With through hole you can use top and bottom of the through hole parts to route traces, but with SMD you have to use via’s and place them in certain spots for them to not cause issues.

Picture of one Aleph turbo SMD running, at 45V rails I’m achieving 80watts RMS into 8 ohms. Does it make heat ? “SURE DOES”

In this next picture we can see that I’m running the amplifier under load, not full load but just a easy test load.

Back to Untangle !

Well, I went back to Untangle, just can’t find any firewall on the market that I like. Been using Untangle for over 10 years now !

Picked up a Brand new Hp Dl20 Gen 10 box, with a Xeon 2224 with 16 gigs ram. At first the machine hated the m.2 slot, it ran fine had no issues but the fans would not ramp down, because not “100%” supported hp m.2 card.

So I ditched the m.2 and bought a pair of 256gig SATA drives ( cheap Samsung’s ) Installed them in Raid1 and off we go !

Id have to say, installing the AMSD driver on Debian10 was tricky but I got it working and installed & running.

So far the box is running stable & quiet, the odd Fan ramp up but its ok.

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