[R-390] Electronic question

[Jim Brannigan]

Ken,
I'm not clear on the function of the resistors.
They may be in parallel for heat dissipation or inductance considerations.
In any event, it is always better to follow the original design when
replacing components, particularly in power RF circuits.

Jim

> A question, I smoked four resistors in My TS520-SE.  My fault, I did an
> idiot job tuning it.  The resistors are on a circuit board controlling the
> grids, plates and modulation of the 6146B finals. no real harm, just have
to
> dig through the resistor stash and install another set. The resistors in
> question are all 4000 ohms 1/4 watt carbons. The four are installed in
> parallel sets, the rule as I understand it is
> resistors in parallel are always half the lowest resistance, in this case
it
> should be about 2000 ohms.  Why do it this way. Why not just
> use a single 2000 ohm resistor. The only reason I can think of is
> it is a size thing. The area where this circuit board is located is
> on the bottom below the finals and there isn't much room. What say
> you out there oh great Guru's of the Order of St Videcon.
>
>                                Ken