[R-390] RE: Best ballast tube resistor

Mon, 12 May 2003 23:45:54 -0700

(1) Remove the VFO tube, V701 (5749/6BA6W) and the BFO tube, V501
(5749/6BA6W).   The VFO tube is underneath, in the PTO assembly, and the =
BFO
tube on the IF chassis,  behind the Line Meter switch.

(2) Replace each with 12BA6 tubes.

(3) Using a small piece of solid wire, make a wire jumper and install it
(plug it in) between pins 2 and 7 of the ballast tube socket.   No
disassembly, soldering or other modifications are necessary.

73 de Bill, AB6MT
[email protected]

----- Original Message -----
From: [email protected]
To: [email protected]
Sent: Monday, May 12, 2003 6:29 PM
Subject: [R-390] Best ballast tube resistor

Should I use a 39 or 40 ohm resistor to replace my bad ballast tube?

1%, 5% or 10% and what wattage?

Someone told me that if I use a resistor, my R-390A would not work =
properly.

What should I do?

The Firebottle
The Original
Accept No Substitutes

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