[TechAssist] Re: Zener diode test
- From: Scott Beebe <Scott@xxxxxxxxxxxxxxxxxxxxx>
- To: Rich M <techassist@xxxxxxxxxxxxx>
- Date: Mon, 13 Jun 2005 14:38:08 -0400
Hello Rich,
Should be attached.
Thanx,
Scott Beebe
Ohm Electronics Inc.
609 W. Clinton St.
Ithaca NY 14850
Voice: (607) 273-8406
Fax: (607) 273-8743
WWW.OhmElectronicsInc.com
mailto:Scott@xxxxxxxxxxxxxxxxxxxxx
Saturday, June 11, 2005, 8:42:55 AM, you wrote:
Rich> Scott I would be interested in the pdf for the zeiner tester.
Rich> thanks
>>From: Scott Beebe <Scott@xxxxxxxxxxxxxxxxxxxxx>
>>Reply-To: techassist@xxxxxxxxxxxxx
>>To: Jim Myers <techassist@xxxxxxxxxxxxx>
>>Subject: [TechAssist] Re: Zener diode test
>>Date: Thu, 9 Jun 2005 14:51:20 -0400
>>
>>Hello Jim,
>>I have built a Zener tester, that will go up to 200v and is good to test
Rich> normal diodes for reverse breakdown. I have a PDF of the instructions I
used
Rich> for inspiration. The idea is there, but I went about it in my own way,
with
Rich> the parts avail. I can send it out if anyone is interested.
>>
>>
>>
>> Thanx,
>>
>>Scott Beebe
>>Ohm Electronics Inc.
>>609 W. Clinton St.
>>Ithaca NY 14850
>>Voice: (607) 273-8406
>>Fax: (607) 273-8743
>>WWW.OhmElectronicsInc.com
>>mailto:Scott@xxxxxxxxxxxxxxxxxxxxx
>>
>>Thursday, June 9, 2005, 2:15:38 PM, you wrote:
>>
>>Jim> Look up MTZJ-T-77- in NTE and you'll find a fair selection of various
>>Jim> zeners, the first few on the list, up to 10 volts require a test
Rich> current
>>Jim> of 20ma and the rest require only 9.5ma or less. Maybe a new battery
Rich> in
>>Jim> your meter WOULD make a difference. In any case if they are used as a
>>Jim> protection device on the A/V inputs and are not shorted they are
>>Jim> probably not causing any problems.
>>
>>
>>Jim> ********************************
>>Jim> Since 1972 *
>>Jim> Jim Myers *
>>Jim> Telrad Electronics *
>>Jim> Fort Wayne Indiana *
>>Jim> ********************************
>>
>>
>>Jim> Paul wrote:
>>>>Yes, I agree. They appear to be just 1/2w Zeners, although
>>>>very small glass cases. I measured a 9.1v, 1w that I had in stock
>>>>and it measured fine on both meters. Interesting though, I checked
>>>>to see if they would zener and they do 9.4v. They still don't front
>>>>to back. How do you figure that? These are in a 2 year old set and
>>>>are used in the A/V input circuit apparently as protect.
>>>> Paul
>>>>
>>>>Jerome Silverman <greentron@xxxxxxx> wrote:
>>>>Sounds like plain vanilla 9.1 volt zeners. But to answer your question,
Rich> some
>>>>"zeners" are actually ICs and some have one or more forward biased diodes
Rich> in
>>>>series with the zener element and some may consist of two or more zener
>>>>elements in series.
>>>>Jerry Silverman
>>>>Greentron Inc
>>>>4 Newland Ave Greenville SC 29609
>>>>Fax/Phone 864 232 3889
>>>>greentron@xxxxxxx
>>>>
>>>>----- Original Message -----
>>>>From: "Paul"
>>>>To:
>>>>Sent: Wednesday, June 08, 2005 9:44 PM
>>>>Subject: [TechAssist] Zener diode test
>>>>
>>>>
>>>>
>>>>>Are there zener diodes that cannot be measured? I have 4 Sony zeners P/N
>>>>
>>>>MTZJ-T-77-9.1B on a board. They do not cross and I am guessing they are
Rich> 9.1v
>>>>zeners. They all are either open or they do not measure. Have lifted one
Rich> end
>>>>and measured with two different meters,Beckman and a Fluke still no
Rich> reading.
>>>>Can't believe all 4 are open.
>>>>
>>>>>Paul
>>>>>
>>>>>Paul ,B
>>>>>Central TV&Video
>>>>>911W Grand Ave
>>>>>Grover Beach Ca.
>>>>>(805)481-8084
>>>>>
>>>>>------------------------------------------------------------------------
Rich> --
>>>>
>>>>---
>>>>
>>>>>This Email List is Public. Remove:
>>>>>http://www.tech-assist.org/remove.htm
>>>>>Lost Password: http://www.tech-assist.org and select "Login Problems?".
>>>>>Appliance Repair List:
>>>>
>>>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
>>>>
>>>>>Email Archives: //www.freelists.org/archives/techassist/
>>>>
>>>>
>>>>-------------------------------------------------------------------------
Rich> ----
>>>>This Email List is Public. Remove:
>>>>http://www.tech-assist.org/remove.htm
>>>>Lost Password: http://www.tech-assist.org and select "Login Problems?".
>>>>Appliance Repair List:
>>>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
>>>>Email Archives: //www.freelists.org/archives/techassist/
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>Paul ,B
>>>>Central TV&Video
>>>>911W Grand Ave
>>>>Grover Beach Ca.
>>>>(805)481-8084
>>>>
>>>>-------------------------------------------------------------------------
Rich> ----
>>>>This Email List is Public. Remove:
>>>>http://www.tech-assist.org/remove.htm
>>>>Lost Password: http://www.tech-assist.org and select "Login Problems?".
>>>>Appliance Repair List:
>>>>http://www.tech-assist.org/secure/tip/chatjoin.htm#app
>>>>Email Archives: //www.freelists.org/archives/techassist/
>>>>
>>Jim>
Rich>
----------------------------------------------------------------------------
Rich> -
>>Jim> This Email List is Public. Remove:
>>Jim> http://www.tech-assist.org/remove.htm
>>Jim> Lost Password: http://www.tech-assist.org and select "Login
Rich> Problems?".
>>Jim> Appliance Repair List:
>>Jim> http://www.tech-assist.org/secure/tip/chatjoin.htm#app
>>Jim> Email Archives: //www.freelists.org/archives/techassist/
>>
>>
>>---------------------------------------------------------------------------
Rich> --
>>This Email List is Public. Remove:
>>http://www.tech-assist.org/remove.htm
>>Lost Password: http://www.tech-assist.org and select "Login Problems?".
>>Appliance Repair List:
Rich> http://www.tech-assist.org/secure/tip/chatjoin.htm#app
>>Email Archives: //www.freelists.org/archives/techassist/
Rich>
-----------------------------------------------------------------------------
Rich> This Email List is Public. Remove:
Rich> http://www.tech-assist.org/remove.htm
Rich> Lost Password: http://www.tech-assist.org and select "Login Problems?".
Rich> Appliance Repair List:
Rich> http://www.tech-assist.org/secure/tip/chatjoin.htm#app
Rich> Email Archives: //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Appliance Repair List: http://www.tech-assist.org/secure/tip/chatjoin.htm#app
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
