[R-390] Power Cords on eBay

[Jack/AE7DX]

I was given an R-390 a couple of weeks ago and had to replace a damaged 
power cord. Upon turning the radio on I found that it trips the GFI 
outlet in my shack/garage even with no antenna connected. I then 
disconnected the ground (yes, only temporarily as a test) and find that 
the '390 works without out tripping the GFI. I have no documentation so 
I cannot determine a cause at this point.

I am curious as to how I can determine whether this is an R-390, an 
R-390A or some other variation. It has been many years since I have seen 
one and this unit has had the front name plate removed so I don't even 
know the manufacturer. Can anyone suggest any identifying 
marks/labels/etc to assist?

Thanks,

Jack, AE7DX

John Lawson wrote:

>
>
> On Wed, 5 Oct 2005, Richard Loken wrote:
>
>> On Wed, 5 Oct 2005, Barry wrote:
>>
>>> I wondered about that.  I didn't know if the original cords were
>>> non-polarized or not.
>>
>>
>> Polarization was irrelivant.  The manual told you in no uncertain 
>> terms to
>> run a separate ground wire at all times.
>
>
>
>    I notice now (after my previous posting) that this current cordset 
> is inexplicably two-wire.  I do repeat that the cable I bought from 
> him in August was in fact three-wire, and is working well on my 
> R-390.  I wrote him a quick note to ask about why he decided not to 
> use a grounded cordset on this - we'll see what the response is.
>
>
>  And I certainly agree that the radio oughta be tied firmly to Mother 
> Earth - by any means available.
>
>
>  Cheers
>
> John  KB6SCO
>
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