[R-390] Re: Crystal Oven Heater Resistance

[Flowertime01 at wmconnect.com]

Mike,

The Y2K manual started from a photo file that was read by a software program 
and turned from bits back into text. That text was then read by a human and 
"corrected".

There were lots of errors in the original TM's they are all over the place.
We do not get amazed when we find one.

Examine the schematic and do a correct analysis of the circuit as you really 
have the circuit under measurement.

Think about dc resistance and ac inductance as you are trying to figure out 
what is going on. What the dc meter reads is not likely what the ac impedance 
is. Cold dc resistance may be no where near hot dc resistance.

So what you read in a cold circuit may not be close to the operating point 
after the elements warm up for 10 or 15 seconds.


We never did put a lot of stock in dc resistance checks as a way to trouble 
shoot and localize problems. And every thing we read in the TM was suspect.

Roger AI4NI   </HTML>