Hi guys!
I am building myself a new SOZ, because I find I cannot live without one 😉
I've buildt several version in the past; the latest one was converted to a A30. While the A30 shure is a nice piece of machinery, there is something magic about the SOZ. I feel I connect more to the music with it.
One other excuse to "just bulid another SOZ", is that I have all the parts I need in my junk-boxes.
BUT, I'm going to use 4,7R instead of the 8R....
My rails are going to be very near 21VDC. I know, I'm going to pay an efficiency penalty for this, but I think it will be sligtly better. (Higher bias (1,75->2,5A, higher voltage (7->9V) on the Drains.
I will also use schottky's and lots of Rifa PEH200's (no coils).
4,7R is Arcol HS50, 1R Arcol HS15. The toroid is a ToroidTM 600VA 2*18VAC (it's going to have a hard time with the 400W power demand😎 ->It'll have to be a semi-open enclosure...
Anyways; I've been going through the U=RI/P=UI calculations, and it doesn't seem like R7 (the horisontal 1R) needs to be a high-power device. I was thinking a 2W metalfilm? <----
This one I would like to have some feedback on
I'll update as time permits.
I'd like some feedback on this, especially the R7 question
😕
I am building myself a new SOZ, because I find I cannot live without one 😉
I've buildt several version in the past; the latest one was converted to a A30. While the A30 shure is a nice piece of machinery, there is something magic about the SOZ. I feel I connect more to the music with it.
One other excuse to "just bulid another SOZ", is that I have all the parts I need in my junk-boxes.
BUT, I'm going to use 4,7R instead of the 8R....
My rails are going to be very near 21VDC. I know, I'm going to pay an efficiency penalty for this, but I think it will be sligtly better. (Higher bias (1,75->2,5A, higher voltage (7->9V) on the Drains.
I will also use schottky's and lots of Rifa PEH200's (no coils).
4,7R is Arcol HS50, 1R Arcol HS15. The toroid is a ToroidTM 600VA 2*18VAC (it's going to have a hard time with the 400W power demand😎 ->It'll have to be a semi-open enclosure...
Anyways; I've been going through the U=RI/P=UI calculations, and it doesn't seem like R7 (the horisontal 1R) needs to be a high-power device. I was thinking a 2W metalfilm? <----
This one I would like to have some feedback on I'll update as time permits.
I'd like some feedback on this, especially the R7 question
😕
Hi Mad_K
It seems to me, that you will get a voltageg swing at 1.5V at 1A over R7, so 2 W resistor might be a little on the edge.
I have simulated your setup, and here it seems as if you will lower the max output voltage swing a couple of volts by replacing all 8Ohms with 4.7Ohms and a lot more heat and stress to the 600VA transformer.
Any particular reason?
It seems to me, that you will get a voltageg swing at 1.5V at 1A over R7, so 2 W resistor might be a little on the edge.
I have simulated your setup, and here it seems as if you will lower the max output voltage swing a couple of volts by replacing all 8Ohms with 4.7Ohms and a lot more heat and stress to the 600VA transformer.
Any particular reason?
Thanks Henrik! How do you calculate the U/I for R7? I'm going to try so simulate some myself, but I've never done it before.
-I thought I got a few volts more outputswing?
The reason is that I have the 4,7R in my box.. Maybe I'll go into the thinking box a little more....
-I thought I got a few volts more outputswing?
The reason is that I have the 4,7R in my box.. Maybe I'll go into the thinking box a little more....
Hi
So sorry, shure you will get 2 more volt´s output swing, my fault.
I did not calculate, I measured in the SIMetrix simulator, the easiet one to use, good, and it´s free.
So sorry, shure you will get 2 more volt´s output swing, my fault.
I did not calculate, I measured in the SIMetrix simulator, the easiet one to use, good, and it´s free.
Ohm's law told me I'd get 9 volts on the Drains....😉
Thanks for the tip on the sim, I'll try that later on...
Thanks for the tip on the sim, I'll try that later on...
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