[Vintage-Radio] Two more HRO questions

[Vic Rosenthal]

Donald Chester wrote:

> From my experience with the pre-ww2 HRO, I would avoid changing coils 
> with  
> the B+ on.  For one, it's hard  to avoid  getting knocked on your bum 
> while pulling the coil out.  There is a point in the process that  
> leaves the entire coil unit at high voltage as the coil unit is slid 
> out.  Secondly, it causes arcs at the coil contacts, certainly not good 
> for the contacts in the receiver or on the coil.

Hmm, very good reasons!  It's funny to think that just a few years ago our 
approach to dangerous things was so...different.  Just look at the exposed racks 
with plug-in coils at high potential, big AC knife switches, etc. of the '30's 
and '40's.   Today the HRO would have a microprocessor that would detect the 
approach of a hand near the coil and cut the power.  Or they'd make it work at 
12 volts.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco