[R-390] re: I-177 question (OT)

[Drew Papanek]

Dan Merz wrote:

>Hi,  the substitute for 83 type tube described by Douglas for use in a
>number of Hickok tube testers used two 1N4007 diodes and two 10 ohm/1 watt
>resistors.   <snip>   He claimed this worked exactly like the 83 in the 
>number of Hickok testers he had >tried. <snip>

The information I have read on this modification states that the tester's 
calibration would be affected and would need readjustment.   IIRC, the 
calibration standard  is a selected 6L6 supplied by Hickok.

Drew