[Milsurplus] High Voltage Electronic Load

[J. Forster]

You may want to add a cathode resistor, so the circuit acts like a voltage
controlled current source. Otherwise, the control, via the grid bias, will
be highly non-linear.

-John

====================



> I don't have the article, but it isn't hard to figure.  Put a variable
> bias supply across the grid, cut off will be minus 250-300 volts, and
> current will increase as bias is reduced.  The 304-TL is rated 3000
> volts, 300 Watts, 900 ma maximum.  Also put RF chokes in the grid and
> plate leads perchance it wants to oscillate.
>
> At the time 304-TL's sold for less that a dollar, so this was a
> reasonable application.  Today they are worth significant money, so it's
> not so clear-cut.
>
> Richard, AA1P
>
>
> On 02/21/2014 09:17 PM, n2lxm at juno.com wrote:
>> Good Evening All,
>>
>>          I am trying to fine some information on a Radio Magazine
>> article.
>> I be leave it was in 73 magazine, years ago. The author used a 304 TL
>> Triode as an electronic load for testing High Voltage supplies. Dose
>> anyone remember such an article and what magazine it cold have been in.
>> Or if you have a circuit that you have used. Thanks
>>
>>
>>                                  Jeff N2LXM
>>                    AMATEUR RADIO OPERATOR
>>                                  AMERICAN
>>                                    PATRIOT
>>                    Proud Father of two US MARINES
>>
>> ____________________________________________________________
>>
>
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