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

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
> >>>
> >>>
> >>>
> >>>------------------------------------------
> >>>To REMOVE your email address, click here:
> >>>  http://www.tech-assist.org/unsubb.html
> >>>To CHANGE your email address, click here:
> >>>  http://www.tech-assist.org/change.html
> >>>------------------------------------------
> >>>***NEW*** Tips Added Instantly!!!***
> >>>Submit Repair Tips here:
> >>>http://www.tech-assist.org/secure/tip/
> >>>
> >>>
> >>>
> >>------------------------------------------
> >>To REMOVE your email address, click here:
> >>  http://www.tech-assist.org/unsubb.html
> >>To CHANGE your email address, click here:
> >>  http://www.tech-assist.org/change.html
> >>------------------------------------------
> >>***NEW*** Tips Added Instantly!!!***
> >>Submit Repair Tips here:
> >>http://www.tech-assist.org/secure/tip/
> >>
> >>
> >>
> >
> >
> >________________________________________________________________
> >GET INTERNET ACCESS FROM JUNO!
> >Juno offers FREE or PREMIUM Internet access for less!
> >Join Juno today!  For your FREE software, visit:
> >http://dl.www.juno.com/get/web/.
> >------------------------------------------
> >To REMOVE your email address, click here:
> >  http://www.tech-assist.org/unsubb.html
> >To CHANGE your email address, click here:
> >  http://www.tech-assist.org/change.html
> >------------------------------------------
> >***NEW*** Tips Added Instantly!!!***
> >Submit Repair Tips here:
> >http://www.tech-assist.org/secure/tip/
> >
> >------------------------------------------
> >To REMOVE your email address, click here:
> >  http://www.tech-assist.org/unsubb.html
> >To CHANGE your email address, click here:
> >  http://www.techassist.net/forms/change.html
> >------------------------------------------
> >***NEW*** Tips Added Instantly!!!***
> >Submit Repair Tips here:
> >http://www.tech-assist.org/secure/tip/
> >
> >
> >
> >
>
> --
> Hugh Thornley
> Main TV
> 636 Main St.
> Longmont, Colorado 80501
> 303-776-6955
> maintv2002@xxxxxxxxxxxxx
>
>
>
>
> ------------------------------------------
> To REMOVE your email address, click here:
>   http://www.tech-assist.org/unsubb.html
> To CHANGE your email address, click here:
>   http://www.techassist.net/forms/change.html
> ------------------------------------------
> ***NEW*** Tips Added Instantly!!!***
> Submit Repair Tips here:
> http://www.tech-assist.org/secure/tip/
>

------------------------------------------
To REMOVE your email address, click here:
  http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
  http://www.techassist.net/forms/change.html
------------------------------------------
***NEW*** Tips Added Instantly!!!***
Submit Repair Tips here: 
http://www.tech-assist.org/secure/tip/

Other related posts: