Hey this is pretty cool. I bought the pair of Telefunken line amps from sahib, and he mentioned options for racking and psu for them, and another new 672 from neilsk I just received…why yes!
I mentioned I had a JLM Power Plant 2 rail psu kit on the shelf.
A solid, widely available 24/48 volt power supply. SUPER easy to build.
Currently it’s about $110 USD, delivered. Don’t know about other places in the world.
https://www.jlmaudio.com/shop/power-plant-kit.html?display_tax_prices=1
Sahib said it would fit perfectly in a psu case he had, the size of a two slot rack case.
It has built in LM317s for 24v and 48v connected to a honking heat sink and a fused IEC etc.
So instead of mounting the regs on the back of the psu as stock, we are attaching some flying leads to the case regs.
HELPFUL if you are building the psu from scratch for this, DO NOT solder the transformer onto the psu until you connect the leads from the rear side of the pcb, although it can be done from the back (as I did).
The orientation of the leads on the case is the same as if the regs were on the psu back, so it’s really clear.
Sahib suggested insulating the connection under the psu, so I snipped the ends of the silicone booties used on the stock kit, slid them over the wires and wrapped them with a little tape.
Maybe right angle connectors for these junctions? But some 4/40 standoffs I had worked fine to get some elevation.
Let me say sahib made me connectors for all the anticipated connection points, so this is so easy I can do it.
I used the pcb template to drill some holes in the steel cabinet with a good bit.
When I had the placement figured out and the regulators attached, i attached the case IEC wires to the pcb, powered up the Power Plant and after a few minutes it easily calibrated to 24v and 48v.
Blue skies!
There are ground wires to attach but it’s pretty much set to go. It will be calibrated again at the end, with the case adjustments.
The next place sahib said to focus on was the multicore cable and soldering it to the DC connector at the rack end of the psu cord.
Always tiny fiddly wires, but this is the hardest thing so far.
Did I mention I’m learning a lot?
How awesome is this??
Updates soon!
I mentioned I had a JLM Power Plant 2 rail psu kit on the shelf.
A solid, widely available 24/48 volt power supply. SUPER easy to build.
Currently it’s about $110 USD, delivered. Don’t know about other places in the world.
https://www.jlmaudio.com/shop/power-plant-kit.html?display_tax_prices=1
Sahib said it would fit perfectly in a psu case he had, the size of a two slot rack case.
It has built in LM317s for 24v and 48v connected to a honking heat sink and a fused IEC etc.
So instead of mounting the regs on the back of the psu as stock, we are attaching some flying leads to the case regs.
HELPFUL if you are building the psu from scratch for this, DO NOT solder the transformer onto the psu until you connect the leads from the rear side of the pcb, although it can be done from the back (as I did).
The orientation of the leads on the case is the same as if the regs were on the psu back, so it’s really clear.
Sahib suggested insulating the connection under the psu, so I snipped the ends of the silicone booties used on the stock kit, slid them over the wires and wrapped them with a little tape.
Maybe right angle connectors for these junctions? But some 4/40 standoffs I had worked fine to get some elevation.
Let me say sahib made me connectors for all the anticipated connection points, so this is so easy I can do it.
I used the pcb template to drill some holes in the steel cabinet with a good bit.
When I had the placement figured out and the regulators attached, i attached the case IEC wires to the pcb, powered up the Power Plant and after a few minutes it easily calibrated to 24v and 48v.
Blue skies!
There are ground wires to attach but it’s pretty much set to go. It will be calibrated again at the end, with the case adjustments.
The next place sahib said to focus on was the multicore cable and soldering it to the DC connector at the rack end of the psu cord.
Always tiny fiddly wires, but this is the hardest thing so far.
Did I mention I’m learning a lot?
How awesome is this??
Updates soon!
