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Current regulator for Tube heater
Current regulator for Tube heater
Further to the discussion on heater current liming in an adjacent
thread, it has just been suggested to me by e-mail that a current-limiting
diode like the 1N5292 might be a good place to start.
* w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
Any ideas?
Iain
Further to the discussion on heater current liming in an adjacent
thread, it has just been suggested to me by e-mail that a current-limiting
diode like the 1N5292 might be a good place to start.
* w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
Any ideas?
Iain
Re: Current regulator for Tube heater
On Apr 22, 8:57 am, "Iain Churches" <Iai...@kolumbus.fi> wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting=
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
>
> Iain
That is a very expensive idea.
Take the one you picked as an example, to power a 12AX7 heater at
12.6V, you will need 267 pieces in parallel. Or if you take 1N5314,
you will need 35 in parallel.
K. L.
On Apr 22, 8:57 am, "Iain Churches" <Iai...@kolumbus.fi> wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting=
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
>
> Iain
That is a very expensive idea.
Take the one you picked as an example, to power a 12AX7 heater at
12.6V, you will need 267 pieces in parallel. Or if you take 1N5314,
you will need 35 in parallel.
K. L.
Re: Current regulator for Tube heater
--
Iain
Aural perception is a skill that requires study and careful development over
along period of time. Few have it as a natural gift.
<kloon@visto . com > wrote in message
news:ec70460e-cd6b-4db2-ae06-406e8f9cda69@s50g2000hsb.googlegroups . com ...
On Apr 22, 8:57 am, "Iain Churches" <Iai...@kolumbus.fi> wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
>
> Iain
That is a very expensive idea.
Take the one you picked as an example, to power a 12AX7 heater at
12.6V, you will need 267 pieces in parallel. Or if you take 1N5314,
you will need 35 in parallel.
Hi KL. Yes, Just looked at the datasheet - no use at all.
Where do we go from here?
Iain
--
Iain
Aural perception is a skill that requires study and careful development over
along period of time. Few have it as a natural gift.
<kloon@visto . com > wrote in message
news:ec70460e-cd6b-4db2-ae06-406e8f9cda69@s50g2000hsb.googlegroups . com ...
On Apr 22, 8:57 am, "Iain Churches" <Iai...@kolumbus.fi> wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
>
> Iain
That is a very expensive idea.
Take the one you picked as an example, to power a 12AX7 heater at
12.6V, you will need 267 pieces in parallel. Or if you take 1N5314,
you will need 35 in parallel.
Hi KL. Yes, Just looked at the datasheet - no use at all.
Where do we go from here?
Iain
Re: Current regulator for Tube heater
Iain Churches wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
No use whatever as it has no useful current value of use here (max of 4.7mA).
Plus they need at least 2V across them before they regulate effectively.
They are typically AIUI simply jfets with the gate internally hard-wired to
the source so the current limit is Idss.
Graham
Iain Churches wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
No use whatever as it has no useful current value of use here (max of 4.7mA).
Plus they need at least 2V across them before they regulate effectively.
They are typically AIUI simply jfets with the gate internally hard-wired to
the source so the current limit is Idss.
Graham
Re: Current regulator for Tube heater
Iain Churches wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
>
> Iain
>
>
* cache.national . com /ds/LM/LM317.pdf?
page 17 of the datasheet 1A current regulator. The resistor value is 1.2
divided by current.
* eu.st . com /stonline/products/literature/ds/1318.pdf
page 12 figure 27. The L200 is good for 2 amps but its a bit more
difficult to use than the LM317.
Adam
Iain Churches wrote:
> Further to the discussion on heater current liming in an adjacent
> thread, it has just been suggested to me by e-mail that a current-limiting
> diode like the 1N5292 might be a good place to start.
>
> * w w w .datasheetcatalog.org/datasheet/microsemi/SA5-47.pdf
>
> Any ideas?
>
> Iain
>
>
* cache.national . com /ds/LM/LM317.pdf?
page 17 of the datasheet 1A current regulator. The resistor value is 1.2
divided by current.
* eu.st . com /stonline/products/literature/ds/1318.pdf
page 12 figure 27. The L200 is good for 2 amps but its a bit more
difficult to use than the LM317.
Adam
