[Vintage-Radio] Two more HRO questions

[Vic Rosenthal]

Donald Chester wrote:

> The early [HRO] models had a bare german silver dial.  Later models had a 
> black dial.  I have seen some with sort  of a hammertone grey dial.
> 
> The ones with the bare german silver dial had black painted chassis, 
> round if cans, and the early ones had a 0-5 S-meter instead of 0-9.  The 
> later models had black dials and the chassis was painted grey, and the 
> if cans were rectangular in shape.  I don't think all the changes 
> occurred at the same time, so you may see some receivers with black 
> dial, but black chassis and round if cans.

Mine is definitely a newer one, and the dial was certainly not silver.  I also 
have an NC101X and its dial appears to be a little "off-black" (although not as 
much as the HRO).  So I will assume that it was supposed to be black.

Another question for HRO owners:  The previous owner of mine has bypassed the B+ 
switch on the front panel.  I suspect that he did this because it was arcing or 
unreliable.  Until I get a replacement, is it safe to change coils without 
turning the radio off?

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