[TechAssist] Re: ***** Zener or Avalance diode? *****

I hit fwd, then copied and pasted the url onto the page. The link is
too long for the page on mail here.
Doug

Gemini Computer & TV wrote:
> 
> Actually, make that
> http://www.deas.harvard.edu/courses/es154/lectures/lecture_2/breakdown/break
> down.html
> 
> Bob Waterman, CET #RI-28
> Master Technician License #9109
> Service Manager
> Gemini Computer, TV, & Security Alarms
> (508)695-7302
> (508)695-7769 FAX
> geminitv@xxxxxxxxxxxxxxxx
> geminitv@xxxxxxx
> 
> ----- Original Message -----
> From: "Hugh at Main TV" <maintv2002@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, August 31, 2002 1:28 PM
> Subject: [TechAssist] Re: ***** Zener or Avalance diode? *****
> 
> > The link you posted is not good--maybe try again?
> > Thanks for input.
> > Hugh
> > Main TV
> >
> > Ty Kraemer wrote:
> >
> > >Gentlemen,
> > >Surprise!
> > >In short form:
> > >Below  6 volts the Zener affect is in force.
> > >At 6 volts both are in affect.
> > >Above this voltage, only the Avalanche affect comes to play.
> > >If you want to understand the Zener/Avalanche principal, fallow this
> lead:
> >
> >http://www.deas.harvard.edu/courses/es154/lectures/lecture_2/breakdown/brea
> k
> > >down.html
> > >The address is all one line.
> > >
> > >Ty
> > >
> > >Tiberius (Ty) Kraemer
> > >Blue Star Electronics
> > >3312 Silverton Rd.NE
> > >Salem, OR 97303-2753
> > >Phone: 503 391 1491
> > >E-Mail: ty1k(at)attbi.com
> > >
> > >
> > >----- Original Message -----
> > >From: <gulftech@xxxxxxxx>
> > >To: <techassist@xxxxxxxxxxxxx>
> > >Sent: Thursday, August 29, 2002 7:28 AM
> > >Subject: [TechAssist] Re: Sony KV32S25--Zener or Avalance diode?
> > >
> > >
> > >
> > >Bob,
> > >
> > >Thanks for that information.  I will file that away for my next Fulton
> > >order.
> > >
> > >Still, it doesn't answer the basic questions--"What is the difference
> > >between a zener and an avalanche diode?" and "Will an NTE570 sub for
> > >D648?"
> > >
> > >My understanding is that an avalanche and a zener are the same animal.
> > >The NTE web site provided little help for either question.
> > >
> > >Since D648 is used as a crowbar (protection) only,  the diode is
> > >essentially out of the circuit UNLESS the regulator ckt fails.  For that
> > >reason, I always replace IC643 (DM-58, 8-749-012-13) whenever I find D648
> > >shorted.
> > >
> > >I used an NTE570 to replace D648 a while back when I found I was out of
> > >the original and no time for an order.  Time will tell.
> > >
> > >
> > >Ken Smith
> > >Gulf Technical Services
> > >3034 Gulf Breeze Parkway
> > >Gulf Breeze, FL  32563
> > >850-934-8324 (Voice) 850-932-0819 (Fax)
> > >
> > >
> > >On Thu, 29 Aug 2002 07:34:38 -0400 "Gemini Computer & TV"
> > ><geminitv@xxxxxxxxxxxxxxxx> writes:
> > >
> > >
> > >>I am working on the exact same model right now. D648 is a 150 volt
> > >>zener,
> > >>(generic# EZ0150AV1), Sony part # 8-719-057-52.
> > >>
> > >>Bob Waterman, CET #RI-28
> > >>Master Technician License #9109
> > >>Service Manager
> > >>Gemini Computer, TV, & Security Alarms
> > >>(508)695-7302
> > >>(508)695-7769 FAX
> > >>geminitv@xxxxxxxxxxxxxxxx
> > >>geminitv@xxxxxxx
> > >>
> > >>----- Original Message -----
> > >>From: "Hugh at Main TV" <maintv2002@xxxxxxxxxxxxx>
> > >>To: <techassist@xxxxxxxxxxxxx>
> > >>Sent: Wednesday, August 28, 2002 7:37 PM
> > >>Subject: [TechAssist] Sony KV32S25--Zener or Avalance diode?
> > >>
> > >>
> > >>
> > >>
> > >>>Power surge hit set--replaced 2SC4834s, all small diodes in
> > >>>
> > >>>
> > >>Swmode, C609
> > >>
> > >>
> > >>>& C610 caps,
> > >>>R607 0.1 ohm,  all 22 ohm res. in power, then found D648 shorted.
> > >>>
> > >>>
> > >>No
> > >>
> > >>
> > >>>sub as per Sams or NTE,
> > >>>symbol on Sams looks like zener--- part # is EZ0150AV1---- I put
> > >>>
> > >>>
> > >>in an
> > >>
> > >>
> > >>>NTE570 Avalance diode--set seems to work ok... Question I have is
> > >>>
> > >>>
> > >>what
> > >>
> > >>
> > >>>is difference between a 150 zener and 150 v avalance diode?
> > >>>
> > >>>
> > >>Would they
> > >>
> > >>
> > >>>both work as protection on 135v power line?
> > >>>Hugh
> > >>>
> > >>>--
> > >>>Hugh Thornley
> > >>>Main TV
> > >>>636 Main St.
> > >>>Longmont, Colorado 80501
> > >>>303-776-6955
> > >>>maintv2002@xxxxxxxxxxxxx
> > >>>
> > >>>
> > >>>
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> > >
> >
> > --
> > Hugh Thornley
> > Main TV
> > 636 Main St.
> > Longmont, Colorado 80501
> > 303-776-6955
> > maintv2002@xxxxxxxxxxxxx
> >
> >
> >
> >
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-- 
Doug Keller          "Learn from the mistakes of others,
Wis-Kel Electronics   because you won't live long enough
101 Freeland Ave.     to make them all yourself"
Terra Alta, WV
USA        26764
dek@xxxxxxxxxx
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