[R-390] Local & Line gain potentiometers R390/A

[Nick England]

R104
Resistor, Variable: 2500 ohm, ± 20%, 2 W, JAN type RV4ATSA252D
Log taper

I found a helpful datasheet at
http://www.potentiometers.com/SeriesRV4.cfm

RV4 - 2 Watts @ 70°C; Derate to 0 Watt @ 120°C

Bushing: N = Standard L = Locking S = Panel & Shaft Seal

Switch: A = Without Switch B = SPST Switch

Temperature and Moisture Characteristics: Y = as per MIL-R-94 T=?

Shaft Style: S = Slotted F = Flatted

Shaft Length:  B = 1/2" A = 5/8" D = 7/8" G = 1 1/4" J = 2" K = 2 1/2"

 Resistance Value: Total Resistance Value in Ohms: First 2 numbers are
signicant digits, 3rd number is the number of zeros.

Taper and Tolerance: A = Linear ±10% B = Linear ±20%
C = Log ±10% D = Log ±20% E = Rev. Log ±10% F = Rev. Log ±20%


Happy New Year to all -
Nick England K4NYW
www.navy-radio.com


On Mon, Dec 30, 2013 at 2:03 PM, Craig Heaton <hamfish at efn.org> wrote:
>
> The question is what: What is the translation for RV4ATSA252D? Panel mount
> is a yes, 2W is a yes, ¼ X 7/8 inch shaft is a yes. Taper????? I’ll also
> dare to ask what is today’s replacement?
>
> For a while I’ve been going through a too loud Amelco, 62 contract.
Started
> out with a bunch of could-bees and no ain’ts. Now down to the point of a
> bunch of ain’ts and few could-bees. Swapped out AF & IF sections between a
> Motorola and the too loud Amelco. Still too loud with Motorola stuff. Just
> leaves the panel parts. Also rung out the wiring, nothing there.
>
> Tnx,
> Craig
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