are the boards of HV regulator still available ? Can I paid over PayPal ?
I want to ask you Mr.Jan if the T-Reg can be used as Bench regulated power supply 0-400V with current adj. 0-400mA
I appreciate if you give some modifications for this application
I appreciate if you give some modifications for this application
Hi,
Is there a way to implement a HV delay using this circuit? I see that this is default in the DN2450 version, but I am not sure if it is the case in the latest version. Also what is the switch for ?
Regards,
Davide
Is there a way to implement a HV delay using this circuit? I see that this is default in the DN2450 version, but I am not sure if it is the case in the latest version. Also what is the switch for ?
Regards,
Davide
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Sorry for the late reaction, I've been in hospital to get a new shoulder mounted and lost track of this thread. I'm back and 2-handed again ;-)
In theory this is possible but you need a lot of heatsink. In the situation where your input voltage is 450V, output is 50V @ 400mA the regulator has to get rid of 0.4A X 400V =160W, and that's A Lot.
But if you want to limit max output to say 100mA it is doable.
Jan
I have a bunch of partial kits as described on the website on the way to the diyaudio store, but in the meantime I also have some available myself. Contact me via PM if you need some.
Jan
The switch is to reset the regulator after an overload. Normally you would have to physically disconnect the load to reset it, but you can also use the on-board switch. Of course it will only work if the overload is no longer present.
That version of the regulator with delay was the very old version that had much less performance. The new version is much better. There is a separate high voltage delay that is much more flexible, lets you set the delay between 20 and 254 seconds and also needs minimum wiring in existing equipment.
The high voltage delay diyaudio semi-kit is currently sold out but I have some available I think, and also a box on its way to the diyaudio store.
Jan version
Friends, I have no more boards available but Jason is kindly offering the same half-kit that I provided from the diyaudio store. So, supply of this high voltage regulator is ensured!
Linear Audio T-reg V5 – diyAudio Store
Jan
Linear Audio T-reg V5 – diyAudio Store
Jan
a question re current limiting. What if one wants to set the current limit to say 50mA, for a preamp, not power amp, the value for R16 is impractical.....unless I missed something?, thanks.
There is nothing impractical to set the current limit to 50mA that I know of.
But there is no need to set the current limit to exactly the max current you believe your equipment is needing. In fact, it might not be a good idea to set it that tight, you should also cater for the occasional transient.
If you have a preamp that takes 50mA, you can just set the current limit to say 100mA or 200mA. It still protects the supply as well the preamp in case of a short.
Jan
But there is no need to set the current limit to exactly the max current you believe your equipment is needing. In fact, it might not be a good idea to set it that tight, you should also cater for the occasional transient.
If you have a preamp that takes 50mA, you can just set the current limit to say 100mA or 200mA. It still protects the supply as well the preamp in case of a short.
Jan
thanks for that Jan. I was referring to the value of R16 to be somewhat impractical if one were to try and set the limit to say 50mA, it would be so low, close enough to be a short?But yes, it makes sense to set it between 100 and 200mA.
The lower the current the larger the limit resistor value.
From the build guide:
How to set the current limit
A single resistor, R16, needs to be selected to set the current limit. Current
limiting occurs when the voltage across R16 gets to about 0.8V. So, for example,
if you want a current limit of 180mA, your R6 will be 0.8/0.180 = 3.3Ω.
Jan
From the build guide:
How to set the current limit
A single resistor, R16, needs to be selected to set the current limit. Current
limiting occurs when the voltage across R16 gets to about 0.8V. So, for example,
if you want a current limit of 180mA, your R6 will be 0.8/0.180 = 3.3Ω.
Jan
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Linear Audio T-Reg vs the Vacuum State Super Regulator.
I originally purchased two of these boards for another protect when I ran into trouble with one of my VS super regulators in my RTP3D. After a series of tubes going bad and finally a rectifier tube turned into a flash bulb there was trouble bringing one of the regulators back up to spec. The RTP3D is the jewel in my system and I can't live with out it. So it was natural to put the T-Reg in for as a temp.
At first the sound was disappointing, but I could live with it for a while. After about an hour the T-Reg really brought things to life with all the sound Allen Wrights design is famous for. I must say, at least to these old ears, this regulator is equal to that of Vacuum State's. I will eventual put the originals back in, but for now... no rush.
Jan, thanks for offering the boards. Good design.
Cheers; Glenn
I originally purchased two of these boards for another protect when I ran into trouble with one of my VS super regulators in my RTP3D. After a series of tubes going bad and finally a rectifier tube turned into a flash bulb there was trouble bringing one of the regulators back up to spec. The RTP3D is the jewel in my system and I can't live with out it. So it was natural to put the T-Reg in for as a temp.
At first the sound was disappointing, but I could live with it for a while. After about an hour the T-Reg really brought things to life with all the sound Allen Wrights design is famous for. I must say, at least to these old ears, this regulator is equal to that of Vacuum State's. I will eventual put the originals back in, but for now... no rush.
Jan, thanks for offering the boards. Good design.
Cheers; Glenn
Just noticed these are in the store, that's great!
A few quick questions --
1) What is the regulator dropout voltage? Trying to determine if I should use a SS rectifier with high capacitance on the input for low ripple and high margin into the reg, or if a tube rectifier is adequate.
2) Which point is preferred to tie to the star ground -- the neg of the main filter capacitor, or the output of the regulator?
3) The PCB I plan on using the reg with has room for bypass capacitors on the B+ input, something electrolytic up to 22uF. Is there any value in populating that when using the reg or leave empty?
Thanks!!
A few quick questions --
1) What is the regulator dropout voltage? Trying to determine if I should use a SS rectifier with high capacitance on the input for low ripple and high margin into the reg, or if a tube rectifier is adequate.
2) Which point is preferred to tie to the star ground -- the neg of the main filter capacitor, or the output of the regulator?
3) The PCB I plan on using the reg with has room for bypass capacitors on the B+ input, something electrolytic up to 22uF. Is there any value in populating that when using the reg or leave empty?
Thanks!!
Hi,
I think Jan should answer that for a more competent answer, but for what's it worth:
- Voltage margin between input and output should always be more than the D-S voltage of the pass FET, so more than, say, 4.5V. That is, input voltage always needs to be higher than that - the lowest Vp of the input waveform, taking the remaining ripple into account, and also wall voltage fluctuations causing lower Vraw.
- I would instinctively choose the regulator's output as the most quiet point in the circuit. No ripple currents there anymore.
- I have in my preamp about 20 uF MKP as local decoupling. In my EL 84 PP I use about 250 uF MKP as local capacitors - I first built that one without the regulator. I can see no adverse effects 🙂.
You might ask where to get these capacitances in MKP and how much space the need ... look at "DC-Link" capacitors (solar energy use, I believe) 😀
Best regards, Claas
I think Jan should answer that for a more competent answer, but for what's it worth:
- Voltage margin between input and output should always be more than the D-S voltage of the pass FET, so more than, say, 4.5V. That is, input voltage always needs to be higher than that - the lowest Vp of the input waveform, taking the remaining ripple into account, and also wall voltage fluctuations causing lower Vraw.
- I would instinctively choose the regulator's output as the most quiet point in the circuit. No ripple currents there anymore.
- I have in my preamp about 20 uF MKP as local decoupling. In my EL 84 PP I use about 250 uF MKP as local capacitors - I first built that one without the regulator. I can see no adverse effects 🙂.
You might ask where to get these capacitances in MKP and how much space the need ... look at "DC-Link" capacitors (solar energy use, I believe) 😀
Best regards, Claas
I'll try to reply to both in one go. The drop out is determined by the 'flying supply' for the control circuit which is about 6V. If you count in variations in mains and ripple voltage, set the output at least 10V below the lowest ripple point.
Agree with chede on the ground point. The reservoir cap has it's own ground, and that is wired to the T-Reg input. The T-Reg delivers an output voltage between the two output pins. Take these to your amplifier for cleanest power.
If you have space for an additional decoupling, a 22uF sounds fine. There is no advantage going higher, the additional cap does provide some extra stability. MKPs or other very low ESR caps are actually detrimental for stability and that money is better used elsewhere.
MKPs are great for signal coupling, but for supply decoupling you need something with a bit of loss.
Jan
Agree with chede on the ground point. The reservoir cap has it's own ground, and that is wired to the T-Reg input. The T-Reg delivers an output voltage between the two output pins. Take these to your amplifier for cleanest power.
If you have space for an additional decoupling, a 22uF sounds fine. There is no advantage going higher, the additional cap does provide some extra stability. MKPs or other very low ESR caps are actually detrimental for stability and that money is better used elsewhere.
MKPs are great for signal coupling, but for supply decoupling you need something with a bit of loss.
Jan
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