[Heathkit] WTB: Heathkit HN-31 cantenna.

[Donald Spoon]

I have the HN-31, but want to keep it as I am using it!  On the side of 
the can is a chart that gives the "key-down" times at various power 
levels that you are supposed to observe.  There are two exponential 
curves... one for "transformer oil" and one for "mineral oil".  Up to 
abut 400 watts into the load, the curves are essentially the same but 
start to diverge at this point. At the 1 KW level the transformer oil 
can take about 10 minutes of "key-down" time, while the mineral oil 
curve says it is zero.  From my experience, it can take a minute at 
least at 1 KW using mineral oil from the local drug store.  It does get 
a bit warm...   Another name for Transformer Oil is "Insulating Oil".

Cheers,
-Don Spoon-
K0APK



Edward B Richards wrote:
> Looking for subject with or without the oil. Also need to know where to
> get the oil. Thank you.
>
> Ed K6UUZ
>