I've told you a MILLION times not exagerate!
No, we cannot stop because I'm enjoying the discussion.
73
Jim W7RY
----- Original Message -----
From: "Charles Harpole" <k4vud@hotmail.com>
To: <amps@contesting.com>
Sent: Monday, November 09, 2009 6:49 PM
Subject: Re: [Amps] B- is ur grade
>
> OK, I have deleted over 100,000 "B- " messages. Maybe enuf???
>
> Charles Harpole
> k4vud@hotmail.com
>
>
>
>
>
>> From: dezrat1242@yahoo.com
>> To: amps@contesting.com
>> Date: Mon, 9 Nov 2009 08:57:02 -0800
>> Subject: Re: [Amps] B- questions
>>
>> ORIGINAL MESSAGE:
>>
>> On Mon, 9 Nov 2009 10:57:46 -0500, "Carl" <km1h@jeremy.mv.com> wrote:
>>
>> >I fail to see where you obtain a -3000V, perhaps its a terminology
>> >confusion.
>>
>> REPLY:
>>
>> In a conventional GG amp, both B+ and B- are floating with respect to
>> ground,
>> except for the connection from B- to ground for the grid current meter.
>>
>> If the B+ arcs to ground anywhere and there is no clamping diode, the B-
>> in
>> instantly driven to the full negative HV with respect to ground. If your
>> HV is
>> 3000 VDC, the B- ;lead becomes -3000 VDC. The clamping diode from B- to
>> ground
>> prevents this.
>>
>> Incidentally, this is why one should never short the B+ to ground when
>> trying to
>> be sure the HV caps are discharged before working on the amp. Short B+
>> directly
>> to B- only, not to the chassis.
>>
>> 73, Bill W6WRT
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
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>
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