Reverse connected ???
I thought they used the Forward Voltage Drop as the reference.
73, Dick, W1KSZ
> From: km1h@jeremy.mv.com
> To: n7fcf@hctc.com; dezrat1242@yahoo.com; amps@contesting.com
> Date: Mon, 9 Nov 2009 20:41:04 -0500
> Subject: Re: [Amps] B- questions
>
> A reverse connected 1N4007 or any similar rectifier diode can be considered
> a zener also and they are used that way in amplifiers to set the operating
> bias. An off the shelf zener conducts at a much higher voltage for their
> lowest values. Ive used Schottky's in a meter protection experiment but
> didnt see any added benefit over a 1N400x. Both always protected the meters
> tested.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: "Jim Carr" <n7fcf@hctc.com>
> To: "Carl" <km1h@jeremy.mv.com>; <dezrat1242@yahoo.com>;
> <amps@contesting.com>
> Sent: Monday, November 09, 2009 6:47 PM
> Subject: Re: [Amps] B- questions
>
>
> > Carl,
> > Another one how about reverse parallel zeners? RCA used a system of
> > reverse parallel zeners accros the 105v 120 cycle signal from the
> > diferential anplifiers to the printed circuit motors of their computor
> > tape drives to saw off the noise spikes rideing on the waveform.
> > Jin
> > N7FCF
> > ----- Original Message -----
> > From: "Carl" <km1h@jeremy.mv.com>
> > To: <dezrat1242@yahoo.com>; <amps@contesting.com>
> > Sent: Monday, November 09, 2009 7:34 AM
> > Subject: Re: [Amps] B- questions
> >
> >
> >> The term I learned in industry is reverse parallel. Anti parallel seems
> >> to
> >> be a ham invention and likely European in origin in line with anti
> >> clockwise
> >> (-;
> >>
> >> Carl
> >> KM1H
> >>
> >>
> >>
> >> ----- Original Message -----
> >> From: "Bill, W6WRT" <dezrat1242@yahoo.com>
> >> To: <amps@contesting.com>
> >> Sent: Monday, November 09, 2009 3:51 AM
> >> Subject: Re: [Amps] B- questions
> >>
> >>
> >>> ORIGINAL MESSAGE:
> >>>
> >>> On Sun, 08 Nov 2009 22:35:36 -0500, Roger <sub1@rogerhalstead.com>
> >>> wrote:
> >>>
> >>>> (I really dislike the term anti parallel...which logically
> >>>>means series, but is used to mean "parallel diodes of opposing polarity"
> >>>>and requires a expanded definition)
> >>>
> >>> REPLY:
> >>>
> >>> I don't like the term "anti-parallel" either, but it is an ancient term
> >>> going
> >>> way back, and it is quite clear once defined. I'm open to suggestions
> >>> for
> >>> something better.
> >>>
> >>> To me, the logical opposite of parallel is non-parallel, but to each his
> >>> own.
> >>>
> >>> 73, Bill W6WRT
> >>> _______________________________________________
> >>> Amps mailing list
> >>> Amps@contesting.com
> >>> http://lists.contesting.com/mailman/listinfo/amps
> >>
> >> _______________________________________________
> >> Amps mailing list
> >> Amps@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/amps
> >
> >
> > --------------------------------------------------------------------------------
> >
> >
> >
> > No virus found in this incoming message.
> > Checked by AVG - www.avg.com
> > Version: 9.0.702 / Virus Database: 270.14.58/2493 - Release Date: 11/09/09
> > 11:40:00
> >
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|