[Johnson] ranger fuse

[Bill Evans]

Avery:

Thanks for the "url" for "Just Radios".  Lots of very interesting 
information and terrific links at this site for hams and antique restoration 
bugs.  Very glad to discover this firm and its  web site.

Bill  VE4UD

----- Original Message ----- 
From: "Comarow, Avery" <ACOMAROW at usnews.com>
To: "K6JEK" <k6jek at comcast.net>; <johnson at mailman.qth.net>
Sent: Thursday, February 16, 2006 3:20 PM
Subject: RE: [Johnson] ranger fuse


I'd like to insert a plug here (okay, bad pun) for www.justradios.com as a 
supplier of X and Y bypass caps, as well as others, usually at a much lower 
price than the usual vendors. No personal agenda here, just a small business 
that is trying to do well by doing good. The antique radio crowd, of which I 
am also a part, thinks pretty highly of them.

Avery W3AVE


-----Original Message-----
From: johnson-bounces at mailman.qth.net
[mailto:johnson-bounces at mailman.qth.net]On Behalf Of K6JEK
Sent: Thursday, February 16, 2006 3:48 PM
To: johnson at mailman.qth.net
Subject: Re: [Johnson] ranger fuse



I've been taught to never put a fuse in the neutral line.  If there is
a fault that puts the AC hot line somewhere that it shouldn't be and
the neutral fuse blows, the danger still exists possibly right at your
fingertips.   There have been many discussions of this topic on this
forum including a nice post in defense of the Johnson design which
maybe made sense at the time given the common wiring of the time.   But
it doesn't make sense now especially for a 50 year old  radio in which
failing components are likely.

On the AC bypass cap issue --  replacing them is a great idea.  We need
to make sure they are capacitors designed for the purpose not the
ordinary vanilla disc ceramics we have in our junk boxes.  For across
the linethey should be a type Y capacitor.  These are readily available
from Mouser, Newark, Digikey.   Here's a link the Vishay/Sprague
website that describes theirs:
http://www.vishay.com/docs/23092/aclinecp.pdf

They seem to have changed part numbers since I bought my supply of
X1/Y2's which in addition to being the safe part for the job have the
bonus of being a beautiful electric blue.   What could be more
appropriate?

Jon, K6JEK

On Feb 16, 2006, at 11:04 AM, SBJohnston at aol.com wrote:

>
>> it's worth noting that the plug fuse values are asymetrical
>> eg... they are NOT the same value..and arent supposed to be. see
>> manual
>
> That's why I used two when I modded my Ranger...
>
> Steve  WD8DAS
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