[ARC5] Why an UNUN?

[J. Forster]

Thank you. That seems pretty realistic.

Best,

-John

=========


> On 10/24/2012 6:28 PM, J. Forster wrote:
>> The 13 seems a bit high. Is there a lower limit given also? I don't have
>> that manual to hand.
>
> As one might expect, there is no published lower limit that I can find.
> There is a note in para 1-24 that records. "The power output of each of
> the transmitters, under optimum antenna loading conditions, exceeds 40
> watts cw and 15 watts voice carrier. Considerably less power than this
> will be obtained when using short antennas whose capacitance may be as
> low as 50uuF, and whose total resistance may be one ohm or less."  That
> sorta sets the boundary conditions for the equation, but it simply says,
> "It all depends...":-)
>
>   - Mike
>
>> ==========
>>> The manual gives a range of values, John.  The upper limit is around 13
>>> ohms resistive, but it also expects a capacitive component.  See para
>>> 1-28 in the ARC-5 manual, although the SCR-274-N and ATA manuals
>>> contain
>>> the same data, IIRC.
>>>
>>> On 10/24/2012 6:06 PM, J. Forster wrote:
>>>> Where did the 12 Ohms, resistive, come from? A manual? The value of a
>>>> dummy load? Where?
>
>
>