50g

--- In 50g@yahoogroups.com, "Juan C." <jcbuchin@...> wrote:
>
> Hello dr, Using complex with your HP 50g  is really easy, First thing you want to know is to toggle from real to complex, for this just press and hold [left-shift] and then press [TOOL], on top of the screen toggles from C to R (leave it in C). For example, let's say you want to calculate the parallel combination of Z1= 120 + j95 and Z2 = 150 – j80, that is: Zp = (Z1*Z2)/(Z1 + Z2).
> Make sure you are working with soft menus. (flag -117 must be set).
> Let's work with just four decimal places:
> Press and hold [left-shift] and then press [MODE] press [F1] to choose FMT then press 4 and [F2] to choose FIX.
> In the math menu let's choose complex
> Press [left-shift] [SYMB] then [NXT]  and [F3] to choose CMPLX.
> Let's enter the first impedance:
> 120 [SPC] 95 [F4] (R->C combine two real numbers in a complex number)
> Let's enter the second impedance:
> 150 [SPC] 80 [+/-] [F4]
> Find the product
> [*] (this means the product key)
> Let's retrieve the two impedance values:
> Press [left-shift] [ENTER] (ANS in RPN retrieve the last argument(s))
> find the sum
> [+]
> finally divide the two values
> [/]
> And there you have it, the value of Zp.
>
Hi
Well, many thanks for the method. I will try that later. On the face of it it has simpified things. Still its a lot to remeber practice makes perfect I suppose.