EDAboard.com | EDAboard.de | EDAboard.co.uk | WTWH Media

Power supply current?

Ask a question - edaboard.com

elektroda.net NewsGroups Forum Index - Electronic for beginners - Power supply current?

Goto page 1, 2  Next

Peter Percival
Guest

Thu Apr 09, 2020 5:45 pm   



I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?

Ralph Mowery
Guest

Thu Apr 09, 2020 5:45 pm   



In article <r6nhhe$k81$1_at_news.albasani.net>, peterxpercival_at_hotmail.com
says...
Quote:

I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



It would be helpful if you would list some of the valves numbers and how
many valves you plan on operating at one time. Do not forget that you
need the filiment voltage also. That could be 5, 6.3, 12.6, just to
start with. You may need other voltages, but they are the most common.

The current for one valve could run from 50 to 200 ma.

Peter Percival
Guest

Thu Apr 09, 2020 6:45 pm   



Ralph Mowery wrote:
Quote:
In article <r6nhhe$k81$1_at_news.albasani.net>, peterxpercival_at_hotmail.com
says...

I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



It would be helpful if you would list some of the valves numbers and how


Not yet decided! Bog standard AF triodes, probably.

Quote:
many valves you plan on operating at one time. Do not forget that you
need the filiment voltage also. That could be 5, 6.3, 12.6, just to
start with. You may need other voltages, but they are the most common.

The current for one valve could run from 50 to 200 ma.


Recommendations for suitable PSUs?

default
Guest

Thu Apr 09, 2020 6:45 pm   



On Thu, 9 Apr 2020 17:47:17 +0100, Peter Percival
<peterxpercival_at_hotmail.com> wrote:

Quote:
Ralph Mowery wrote:
In article <r6nhhe$k81$1_at_news.albasani.net>, peterxpercival_at_hotmail.com
says...

I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



It would be helpful if you would list some of the valves numbers and how

Not yet decided! Bog standard AF triodes, probably.


The chosen tube and power level and class of operation would be
helpful. A visit to a "ham fest" or some such might yield a suitable
PS. They call the old stuff - "boat anchors" because they are heavy.

I picked up a 0 - 1,000 Volt at one amp - For $15. I couldn't even
buy the variac for that price. It was built by a master on a 19" rack
panel, with metered output. I took out the ancient diodes put in some
modern ones and put a filament transformer in the space it opened up.
Quote:

many valves you plan on operating at one time. Do not forget that you
need the filiment voltage also. That could be 5, 6.3, 12.6, just to
start with. You may need other voltages, but they are the most common.

The current for one valve could run from 50 to 200 ma.

Recommendations for suitable PSUs?


Phil Allison
Guest

Fri Apr 10, 2020 2:45 am   



Peter Percival wrote:

---------------------
Quote:
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one - you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


...... Phil

Peter Percival
Guest

Fri Apr 10, 2020 10:45 am   



Phil Allison wrote:
Quote:
Peter Percival wrote:

---------------------
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one


I'd love to. Please point me in the direction of a circuit diagram.

Quote:
- you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


..... Phil


default
Guest

Fri Apr 10, 2020 1:45 pm   



On Fri, 10 Apr 2020 10:27:14 +0100, Peter Percival
<peterxpercival_at_hotmail.com> wrote:

Quote:
Phil Allison wrote:
Peter Percival wrote:

---------------------
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one

I'd love to. Please point me in the direction of a circuit diagram.


I guess you're new to the Internet? They have these things called
"search engines" and all you gotta do is put a few words in, and it
spits out sites that have what you want, links and all!

https://diyaudioprojects.com/Schematics/
Quote:


- you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


..... Phil


Peter Percival
Guest

Fri Apr 10, 2020 3:45 pm   



default wrote:
Quote:
On Fri, 10 Apr 2020 10:27:14 +0100, Peter Percival
peterxpercival_at_hotmail.com> wrote:

Phil Allison wrote:
Peter Percival wrote:

---------------------
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one

I'd love to. Please point me in the direction of a circuit diagram.

I guess you're new to the Internet? They have these things called
"search engines" and all you gotta do is put a few words in, and it
spits out sites that have what you want, links and all!

https://diyaudioprojects.com/Schematics/


Your sarcasm is misplaced because there is no circuit diagram for a
variable voltage power supply on that page.
Quote:


- you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


..... Phil



default
Guest

Fri Apr 10, 2020 5:45 pm   



On Fri, 10 Apr 2020 15:31:29 +0100, Peter Percival
<peterxpercival_at_hotmail.com> wrote:

Quote:
default wrote:
On Fri, 10 Apr 2020 10:27:14 +0100, Peter Percival
peterxpercival_at_hotmail.com> wrote:

Phil Allison wrote:
Peter Percival wrote:

---------------------
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one

I'd love to. Please point me in the direction of a circuit diagram.

I guess you're new to the Internet? They have these things called
"search engines" and all you gotta do is put a few words in, and it
spits out sites that have what you want, links and all!

https://diyaudioprojects.com/Schematics/

Your sarcasm is misplaced because there is no circuit diagram for a
variable voltage power supply on that page.


"I wish to buy a power supply delivering up to 500V for experiments
with thermionic valves. What would be a suitable current?" Where in
that statement do you see variable supply?

I wish to buy wings so I can fly, what would be a suitable altitude?

You put a variable transformer on any of those PS and you have a
variable output. Lot's easier than a solid state regulator and
current limit operating at 500 V.

Dude, you are establishing yourself as a troll. Derision is
warranted, sarcasm be damned. You seem to have no clear idea what you
want, and that is pretty much where all designs start - a goal.
Without a goal you are just wasting everyone's time.
Quote:


- you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


..... Phil



RheillyPhoull
Guest

Fri Apr 10, 2020 11:45 pm   



On 10/04/2020 10:31 pm, Peter Percival wrote:
Quote:
default wrote:
On Fri, 10 Apr 2020 10:27:14 +0100, Peter Percival
peterxpercival_at_hotmail.com> wrote:

Phil Allison wrote:
Peter Percival wrote:

---------------------
I wish to buy a power supply delivering up to 500V for experiments
with
thermionic valves.  What would be a suitable current?



** If you are not competent to make yourself one

I'd love to.  Please point me in the direction of a circuit diagram.

I guess you're new to the Internet?  They have these things called
"search engines" and all you gotta do is put a few words in, and it
spits out sites that have what you want, links and all!

https://diyaudioprojects.com/Schematics/

Your sarcasm is misplaced because there is no circuit diagram for a
variable voltage power supply on that page.


- you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


.....   Phil



Go to DIY Audio Projects and click on say "Mini Block Push-Pull EL84
(6BQ5) Valve Amplifiers" and just use the power supply part of the circuit.

Phil Allison
Guest

Sat Apr 11, 2020 5:45 am   



Peter Percival wrote:

------------------

Quote:
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one

I'd love to. Please point me in the direction of a circuit diagram.



** You seem to be assuming something elaborate is needed.

FYI;

Such a DC supply does not need to be voltage regulated nor completely supply hum free.

The basic components required are a 120V/240V supply transformer with a 325V secondary, a bridge rectifier and 100uF, 500V electro.

Voltage variability is achieved with a Variac feeding the DC supply - readily available new or used and has a myriad of other uses.

Plus a source of 6.3V at a couple of amps.


...... Phil






..

Pimpom
Guest

Sat Apr 11, 2020 9:45 am   



On 4/9/2020 9:42 PM, Peter Percival wrote:
Quote:
I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?


As others have pointed out, you need to be more specific.
For example, if all you want to do is run a 12AX7/ECC83 double
triode as a preamp, all you need is 250-300V at a few milliamps,
plus 6.3 or 12.6V for the heater.

If you want to include a power amp, then you'll need a much
beefier power supply.

Pimpom
Guest

Sat Apr 11, 2020 6:45 pm   



On 4/9/2020 10:17 PM, Peter Percival wrote:
Quote:
Ralph Mowery wrote:
In article <r6nhhe$k81$1_at_news.albasani.net>, peterxpercival_at_hotmail.com
says...

I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



It would be helpful if you would list some of the valves numbers and how

Not yet decided! Bog standard AF triodes, probably.


I'd love to. Please point me in the direction of a circuit
diagram.


Maybe you'd like to try this. I used it many many moons ago -
https://www.dropbox.com/s/9dl0o7z33jiqhft/Tube%20preamp%20power%20supply.png?dl=0

Peter Percival
Guest

Sat Apr 11, 2020 7:45 pm   



RheillyPhoull wrote:
Quote:
On 10/04/2020 10:31 pm, Peter Percival wrote:
default wrote:
On Fri, 10 Apr 2020 10:27:14 +0100, Peter Percival
peterxpercival_at_hotmail.com> wrote:

Phil Allison wrote:
Peter Percival wrote:

---------------------
I wish to buy a power supply delivering up to 500V for experiments
with
thermionic valves.  What would be a suitable current?



** If you are not competent to make yourself one

I'd love to.  Please point me in the direction of a circuit diagram.

I guess you're new to the Internet?  They have these things called
"search engines" and all you gotta do is put a few words in, and it
spits out sites that have what you want, links and all!

https://diyaudioprojects.com/Schematics/

Your sarcasm is misplaced because there is no circuit diagram for a
variable voltage power supply on that page.


- you need to think of another way to waste spare time.

BTW This has all the signs of being a stupid troll.


.....   Phil



Go to DIY Audio Projects and click on say "Mini Block Push-Pull EL84
(6BQ5) Valve Amplifiers" and just use the power supply part of the circuit.


I need a variable voltage, say 100-500 volts.

Peter Percival
Guest

Sat Apr 11, 2020 7:45 pm   



Phil Allison wrote:
Quote:
Peter Percival wrote:

------------------

I wish to buy a power supply delivering up to 500V for experiments with
thermionic valves. What would be a suitable current?



** If you are not competent to make yourself one

I'd love to. Please point me in the direction of a circuit diagram.



** You seem to be assuming something elaborate is needed.

FYI;

Such a DC supply does not need to be voltage regulated nor completely supply hum free.

The basic components required are a 120V/240V supply transformer with a 325V secondary, a bridge rectifier and 100uF, 500V electro.

Voltage variability is achieved with a Variac feeding the DC supply - readily available new or used and has a myriad of other uses.

Plus a source of 6.3V at a couple of amps.


..... Phil


Thank you.

Goto page 1, 2  Next

elektroda.net NewsGroups Forum Index - Electronic for beginners - Power supply current?

Ask a question - edaboard.com

Arabic version Bulgarian version Catalan version Czech version Danish version German version Greek version English version Spanish version Finnish version French version Hindi version Croatian version Indonesian version Italian version Hebrew version Japanese version Korean version Lithuanian version Latvian version Dutch version Norwegian version Polish version Portuguese version Romanian version Russian version Slovak version Slovenian version Serbian version Swedish version Tagalog version Ukrainian version Vietnamese version Chinese version Turkish version
EDAboard.com map