[TechAssist] Re: ***** Zener or Avalance diode? *****
- From: "Tech Repair CD support" <support@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 1 Sep 2002 10:06:56 -0400
Hugh,
The link is good.
http://www.deas.harvard.edu/courses/es154/lectures/lecture_2/breakdown/breakdown.h
tml
You have to realize, most email programs will wrap part of an long URL.
URL's usually end in HTM or HTML.
After you click on the url, you have to copy/paste, or type the rest of the URL
in
the address bar up to HTML.
Jeff
FAX 717-564-4952
Intrepid Video & Electronics
501 Luther Rd
Harrisburg PA 17111-2055
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----- 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/break
>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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>
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--
Hugh Thornley
Main TV
636 Main St.
Longmont, Colorado 80501
303-776-6955
maintv2002@xxxxxxxxxxxxx
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