[TenTec] Station power supply??

[Rick - DJ0IP / NJ0IP]

I have just monitored this until now because I don't know 10% as much as Jim
and some of you others on this topic, but I do know that in my 50 years of
ham radio and having probably 100 or more rigs, I have never seen a rig that
didn't have its chassis tied to the V-... EXCEPT the old Icom IC-215 (if I
recall the number correctly).  It had V+ tied to ground.  The IC-202
(look-alike SSB version of that radio) may also have had positive on its
chassis.

Can anyone name a single radio, outside of walkie talkies, with the V- not
tied to ground?

73
Rick, DJ0IP


-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Cecil
Sent: Thursday, September 06, 2012 3:09 PM
To: k9yc at arrl.net; Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Station power supply??

One only has to spend 15 minutes in the Motorola R56 standard for lightning
and surge protection grounding to understand the shortcomings of the NEC in
properly protecting radio systems installations from those risks.  The R56
is the industry standard for such installations and is an excellent model
for how to properly protect an amateur radio station installation from those
risks.  

The NEC has electrical safety grounding covered and the v- grounding issue
appears philosophical and won't be settled here.  

I will say that many DC powered transceivers have the V- tied to chassis
ground and if you follow the manufacturers instructions (and accepted
practice) and tie the transceiver ground lug to an outside lightning/surge
protection grounding system...and that grounding system is bonded to the
building electrical safety ground as required by the NEC, the V- is
effectively tied to the "green wire" at the electrical panel.  

Just checked two Omni VI's and my Orion II and two Astron switchers...all
have V- tied to chassis ground.  

I have no opinion at this point as to whether that is proper or not but I
don't see many modifying their gear to change that...

I'm done...

Cecil
K5DL


Sent from my iPad

On Sep 5, 2012, at 11:26 PM, Jim Brown <k9yc at audiosystemsgroup.com> wrote:

> On 9/5/2012 8:08 PM, Cecil wrote:
>> I seem to remember this to be a touchy subject. Sorry to have fueled it
in any way.
> 
> I seriously doubt there is any daylight between Bob and myself (or Wes) on
proper grounding.  Our disagreement is about bonding of V-.
> 
> 73, Jim K9YC
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