I hope you won't take offense but your method of learning reminds me of the "Infinite Monkey Theorem". You have been a member here for seven years with > 11,000 posts, most of which are questions about very trivial things like "how do I elevate the heater". You have to ask the same questions every time there is a slight deviation from the previous circuit.
It's obvious that you don't have the very basic understanding that would enable you to figure things out by applying for example Ohm's Law or calculating the impedance of a simple RC network.
Have you considered getting some books from which you could learn?
No, but your English seems to be good enough to read and understand English books. If you don't understand something, run it through Google translate.
I know very little myself, but this has been really helpful for day to day calculations. https://play.google.com/store/apps/details?id=it.android.demi.elettronica&hl=en_GB
Perhaps it is also available in Spanish? Or something similar?
Perhaps it is also available in Spanish? Or something similar?
I have problems using AZ1 rectifier using SSHV2, my target is 150VDC 30mA, attached PSUDII simulation, in place of bridge diode UF4007 I use hybrid graetz rectifier: one AZ1 + two UF4007.
The problem is that in real world attaching a dummly load of 4K7 can't get 150Vout from SSHV2.
When used bridge diode of four UF4007 the SSHV2 can give 30mA 150Vout without problems.
The problem is that in real world attaching a dummly load of 4K7 can't get 150Vout from SSHV2.
When used bridge diode of four UF4007 the SSHV2 can give 30mA 150Vout without problems.
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The target is right...if you don't use SSHV2.
SSHV2 is shunt type stabilizer, ergo if you want 150V, 30mA at the SSHV2 output, your raw supply DC load is 30mA + shunt current (for example 30+20=50mA: this is the CCS current).
The input voltage of SSHV2 must be 15-20V greater than output voltage (in your case about 165-170V).
If you use AZ1 as rectifier, the drop voltage on the tube at 50mA is 26V, so transformer voltage must be at least 190-200V (at 50mA load).
Do you have one HT raw supply (loaded by two SSHV2s)?
No, if your load is 10mA, you use only one SSHV2 feed by two #26 tube (5mA/tube).
The 125V AC transformer with hybrid graetz, 60uF-10H-220uF, 30mA load produce only 130V raw DC voltage.
Try to use at least 180V AC transformer.
No, if your load is 10mA, you use only one SSHV2 feed by two #26 tube (5mA/tube).
The 125V AC transformer with hybrid graetz, 60uF-10H-220uF, 30mA load produce only 130V raw DC voltage.
Try to use at least 180V AC transformer.
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> in real world attaching a dummly load of 4K7 can't get 150Vout from SSHV2.
Simulates fine with 4.7K.
However your part resistances look way wrong. It is unlikely that a 27u cap has the same ESR as a 200u cap. 10 Ohms is awful small for a 10H choke. And 700mOhms can NOT be right for your transformer unless it is big enough to power a house. (My pole-pig is 400mOhms each 125V side to power two 100 Amp houses.)
PSUD has a feature to estimate PT resistance from V, I, and Regulation. I assumed a 50mA rating and 30% regulation (typical for very small transformers). I also assumed a realistic choke DCR. I get 143V, which seems sufficient for a "150V" amplifier. Is that what you get?
> my load is 26 preamp
If I recall correctly, there were no 27uFd caps when the '26 was new, certainly no 200uFd caps of practical size. I wonder how they ever powered those tubes?
> chokes 100H 100mA 10 ohms each.
Are you sure? Did you measure? It is not impossible, just unlikely.
If the choke is truly 10 Ohms, then even with a realistic 750 Ohms in the PT, I get 155V.
Simulates fine with 4.7K.
However your part resistances look way wrong. It is unlikely that a 27u cap has the same ESR as a 200u cap. 10 Ohms is awful small for a 10H choke. And 700mOhms can NOT be right for your transformer unless it is big enough to power a house. (My pole-pig is 400mOhms each 125V side to power two 100 Amp houses.)
PSUD has a feature to estimate PT resistance from V, I, and Regulation. I assumed a 50mA rating and 30% regulation (typical for very small transformers). I also assumed a realistic choke DCR. I get 143V, which seems sufficient for a "150V" amplifier. Is that what you get?
> my load is 26 preamp
If I recall correctly, there were no 27uFd caps when the '26 was new, certainly no 200uFd caps of practical size. I wonder how they ever powered those tubes?
> chokes 100H 100mA 10 ohms each.
Are you sure? Did you measure? It is not impossible, just unlikely.
If the choke is truly 10 Ohms, then even with a realistic 750 Ohms in the PT, I get 155V.
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me> transformer unless it is big enough to power a house.
me> My pole-pig is 400mOhms each 125V side
Ah, I mis-spoke. The 25,000VA transformer is more like 100mOhms total. The rest of my 400mOhms is in a too-long line to the house.
But 700mOhms is not likely for a small 125V winding. A large 125V winding I fought was 11 Ohms, plus primary resistance.
me> My pole-pig is 400mOhms each 125V side
Ah, I mis-spoke. The 25,000VA transformer is more like 100mOhms total. The rest of my 400mOhms is in a too-long line to the house.
But 700mOhms is not likely for a small 125V winding. A large 125V winding I fought was 11 Ohms, plus primary resistance.
Manufacturer specs for source resistance:
1 °) 230 V. Primary 125 V. Secondary 1,84 n. relation volts between Primary & Secondary
2 °) 1,84 n. relation volts between Primary & Secondary squared = 3,3856
3 °) 11 RDC Primaryo ohms / 3,3856 n. relation volts between Primary & Secondary 3,3856 = 3,2491
4 °) 3,2491 + RDC ohms Secondary 3,8 = 7,0491 (Source resistance)
Manufacturer specs:
Rendering 90%
Regulation 0.5%
100W
50Hz
Primary 230VAC
Primary 0.51A
Primary RDC 11 ohms
Secondary 125VAC
Secondary 0.8A
Secondary RDC 3.8 ohms
Measured specs:
Off load voltage 131.8VAC
Primary RDC 11.81 ohms (0.81 ohms can be DVM errror)
Secondary RDC 2.84 ohms (1 ohm can be DVM error)
Attached pics: 1st left choke, 2nd measurement choke, 3rd power transformer & 4th power transformer
1 °) 230 V. Primary 125 V. Secondary 1,84 n. relation volts between Primary & Secondary
2 °) 1,84 n. relation volts between Primary & Secondary squared = 3,3856
3 °) 11 RDC Primaryo ohms / 3,3856 n. relation volts between Primary & Secondary 3,3856 = 3,2491
4 °) 3,2491 + RDC ohms Secondary 3,8 = 7,0491 (Source resistance)
Manufacturer specs:
Rendering 90%
Regulation 0.5%
100W
50Hz
Primary 230VAC
Primary 0.51A
Primary RDC 11 ohms
Secondary 125VAC
Secondary 0.8A
Secondary RDC 3.8 ohms
Measured specs:
Off load voltage 131.8VAC
Primary RDC 11.81 ohms (0.81 ohms can be DVM errror)
Secondary RDC 2.84 ohms (1 ohm can be DVM error)
Attached pics: 1st left choke, 2nd measurement choke, 3rd power transformer & 4th power transformer
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![WP_20170225_001[1].jpg](/community/data/attachments/552/552375-511323d4f897adf0e5e5d97752e4abd7.jpg)
![WP_20170225_002[1].jpg](/community/data/attachments/552/552392-4bd41d6e07273fb53f6dbd38f5a04f9b.jpg)
![WP_20170225_006[1].jpg](/community/data/attachments/552/552409-c06c848dbfb7ca0d3af96795fc300446.jpg)
![WP_20170225_007[1].jpg](/community/data/attachments/552/552428-01ac12d7f843ac11cd61f304979c57c2.jpg)
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> Manufacturer specs:
> Regulation 0.5%
This is unlikely, and a typo. The regulation is 5% at full load.
Because you bought a 100W transformer for a 5W-10W load, indeed you may have 0.5% regulation at your load.
If you indeed have 14 Ohm resistors and 10 Ohm choke (again very oversize), then the raw output of the power supply should be 180V at 30mA load (6K dummy).
> can't get 150Vout from SSHV2
This has a 20V dropout. 180V-150V is 30V difference. It should work.
The SSHV2 instructions say to set SSHV2 current 20mA higher than load current. What *total* current are you setting?
What do you actually get at the INput of the SSHV2?
> Regulation 0.5%
This is unlikely, and a typo. The regulation is 5% at full load.
Because you bought a 100W transformer for a 5W-10W load, indeed you may have 0.5% regulation at your load.
If you indeed have 14 Ohm resistors and 10 Ohm choke (again very oversize), then the raw output of the power supply should be 180V at 30mA load (6K dummy).
> can't get 150Vout from SSHV2
This has a 20V dropout. 180V-150V is 30V difference. It should work.
The SSHV2 instructions say to set SSHV2 current 20mA higher than load current. What *total* current are you setting?
What do you actually get at the INput of the SSHV2?
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