Author Topic: What's this please? (Component Advice)  (Read 384307 times)

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Offline corneliusnl

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Re: What's this please? (Component Advice)
« Reply #1175 on: May 09, 2017, 02:03:32 pm »
Looking for some help identifying these components, with the following smd marks:

transistors AB3, 1A3 (Complimentary?)

Z14F, Z16F ic's

transistor TEw


Thanking you in advance (and probably again later :)

Jeremiah
 

Offline saposoft

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Re: What's this please? (Component Advice)
« Reply #1176 on: May 10, 2017, 09:56:00 am »
Hi everybody
Found this thing in a bunch of throw away from a company doing audio, looks like ceramic encased , quite heavy, no marking of any type beside a handwritten number serialized in all them.
my bet ? microphone capsule, but too many wires...
any info will be good
 

Offline frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1177 on: May 10, 2017, 10:10:03 am »
Hi everybody
Found this thing in a bunch of throw away from a company doing audio, looks like ceramic encased , quite heavy, no marking of any type beside a handwritten number serialized in all them.
my bet ? microphone capsule, but too many wires...
any info will be good

There are ceramic pressure sensing capsules that look somewhat similar. https://www.sensorsone.com/ceramic-pressure-transducer-cells-for-oem-design/
Do not know much about these though...
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Offline djQUAN

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Re: What's this please? (Component Advice)
« Reply #1178 on: May 13, 2017, 05:10:41 am »
I found a bunch of these and initially thought they are a dual diode based on diode check but later found out that they might be something else as they have a zener like property on some of the pins. My Googling didn't turn up any useful result. Any help would be appreciated.

It is a SOT23  and device marking is 5A6i

Edit: tried the link in previous post and it didn't show any possible candidate.
« Last Edit: May 13, 2017, 05:31:39 am by djQUAN »
 

Online amspire

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Re: What's this please? (Component Advice)
« Reply #1179 on: May 13, 2017, 06:41:55 am »
It will be a 5A6 that is a NXP/Philips Dual Zener PZM5.6NB2A which is a dual 5.6V zener with common anodes.

http://www.s-manuals.com/pdf/datasheet/p/z/pzm-na_series_philips.pdf

I suspect that "I" is actually an H on its side. Don't know what that means.
 
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Offline djQUAN

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Re: What's this please? (Component Advice)
« Reply #1180 on: May 13, 2017, 05:47:00 pm »
It will be a 5A6 that is a NXP/Philips Dual Zener PZM5.6NB2A which is a dual 5.6V zener with common anodes.

http://www.s-manuals.com/pdf/datasheet/p/z/pzm-na_series_philips.pdf

I suspect that "I" is actually an H on its side. Don't know what that means.

I measured with 5mA constant current and there it was, 5.6V exactly. What threw me off was the bi-directional breakdown voltage between pins 1-2. Looking at the datasheet internal connection, it made sense.  :palm:

Thanks for the wake up call. I tend to be good at this but today was not my day.  :phew:
 

Offline behrang_dvb

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Re: What's this please? (Component Advice)
« Reply #1181 on: May 16, 2017, 04:23:38 am »
Looking for some help identifying these components, with the following smd marks:
s08040
s07040
 

Offline daqq

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Re: What's this please? (Component Advice)
« Reply #1182 on: May 16, 2017, 07:44:12 pm »
behrang_dvb: It's almost certainly a 32.768kHz crystal.
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Offline Bendba

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Re: What's this please? (Component Advice)
« Reply #1183 on: June 08, 2017, 02:34:58 am »
Hi,

Would someone have any idea what this could be?
It comes out of a HF can from some medical equipment.
There is no continuity between any pads and I don't have any mean to measure capacitance.



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Offline Cubdriver

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Re: What's this please? (Component Advice)
« Reply #1184 on: June 08, 2017, 03:19:55 am »
A crystal, perhaps?

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline Bendba

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Re: What's this please? (Component Advice)
« Reply #1185 on: June 08, 2017, 05:25:00 am »
Hi Pat,

I'm pretty sure it is not a crystal. My best guess is capacitor but I've never seen one like that.

Here is a photo of the board it come from.



The same component (different size) on the top left has a RF signal coming in on one of the small tab from outside the can. Something must come out the other small tab, it's connected to the rest of the circuitry inside the can. The outside of the component is connected to the ground plane.
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Offline bktemp

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Re: What's this please? (Component Advice)
« Reply #1186 on: June 08, 2017, 06:25:11 am »
It is a coaxial ceramic filter. It is probably a bandpass filter.
They are often used for duplexer filters, because of their high Q.
http://www.mcv-microwave.com/ceramic-filters.html
http://www.t-ceram.com/ENGLISH/filter-diplexer.htm
http://www.lorch.com/ceramic.html
« Last Edit: June 08, 2017, 06:35:52 am by bktemp »
 

Offline Bendba

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Re: What's this please? (Component Advice)
« Reply #1187 on: June 09, 2017, 05:16:52 am »
Thanks a lot. Any idea which manufacturer that logo is from?
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Offline jonovid

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Re: What's this please? (Component Advice)
« Reply #1188 on: June 10, 2017, 07:31:11 am »
what type of USB is this?  is it a phone type mini B? is this a USB data interface ? not just 5volt.
has anyone used this chinese DROK 200119 timer

the DROK 200119 instructions do not say a lot about the USB port.
http://www.droking.com/wp-content/uploads/2017/03/200119_instruction.pdf

what I do know about the DROK 200119 is-
DROK 200119 has its micro ic hidden under the 3 digit 7 segment display.
the programmable micro has 18 modes with 2 time settings  from 0.1 sec to hrs.
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Offline Bendba

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Re: What's this please? (Component Advice)
« Reply #1189 on: June 10, 2017, 07:55:22 am »
The datasheet says USB micro, 5V supply, same as a phone charger. Is hard to tell if there is any data supposed to go through it.

Is there any trace going somewhere from the two middle tabs of the connector? If not, definitely no data.
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Offline jonovid

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Re: What's this please? (Component Advice)
« Reply #1190 on: June 10, 2017, 09:23:53 am »
The datasheet says USB micro, 5V supply, same as a phone charger. Is hard to tell if there is any data supposed to go through it.

Is there any trace going somewhere from the two middle tabs of the connector? If not, definitely no data.
need more time set up some 0.5mm test probes on a test jig.
as its hard to see without scratching for the traces.  |O ripping up the pcb.  :--  I was hoping for a USB data dock, so I can setup the timer without using the slow and clunky 3 digit 7 segment interface.  :-\
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Offline Bendba

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Re: What's this please? (Component Advice)
« Reply #1191 on: June 10, 2017, 09:33:27 am »
From what you can see, I wouldn't up my hopes too much. on the front of the board, you can see a trace leaving the rightmost tab of the connector, go down and then left, leaving very little space for anything coming of the two middle tabs. And at the back of the board, there is only one via.

A quick test would be to plug it in the USB port of your computer. If the computer is showing signs of new hardware, there is a data connection.
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Offline jonovid

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Re: What's this please? (Component Advice)
« Reply #1192 on: June 11, 2017, 05:48:02 am »
yes its micro usb   :palm: I was only familiar with the mini usb  and no its not a data port only a 5volt input.  :(
so its back to the 200119 instructions  ;D
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Offline Gadgetman

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Re: What's this please? (Component Advice)
« Reply #1193 on: June 13, 2017, 08:06:31 am »
Hi All,
This board (see pictures) comes from the late 60's oscilloscope I am trying to repair.
I am confused when it comes to some components. I suspect they are capacitors (the silkscreen would suggest pF) but the marking on them is a bit confusing - 20M for 20p silkscreen, 10M for 10p, 510K for 500p, 2000K for 2000p...

I removed one "51K" (marked 50p on the board) and tested it. Capacitance jumps up and down crazily at the beginning and then it settles at steady "47pF". The resistance test shows "OL". This would suggest capacitors as marked on the board's silkscreen but I just wanted to make sure. Especially, that the symbol used on the silkscreen is very similar to the resistor (an empty rectange but a bit shorter than the resistor's).

Also, can I replace them with standard ceramic caps? They are all marked with "WV. 250", so should I assume "Working Voltage" 0.25V or 250V? I think 250V would be safer.
« Last Edit: June 13, 2017, 08:11:15 am by Gadgetman »
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Offline Bendba

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Re: What's this please? (Component Advice)
« Reply #1194 on: June 13, 2017, 08:30:15 am »
Hi,

They are polystyrene capacitors and the M and K are tolerance marking, not multiplier.
M for +- 20%
K for +- 10%

As far as I know, please someone correct me if I'm wrong, those capacitors are extremely reliable and unless physically damaged or sustained dielectric arcing, they shouldn't really need replacing. (Please get someone else to confirm this)

And yes, voltage in in V, not mV
« Last Edit: June 13, 2017, 08:31:55 am by Bendba »
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Offline Gadgetman

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Re: What's this please? (Component Advice)
« Reply #1195 on: June 13, 2017, 09:35:03 am »
Thank you very much for confirmation and new info (tolerances). I learned something again :)
Yes, I read somewhere else, that polystyrene capacitors are very reliable and nowadays are used only for special applications. I will not replace them then  :-+
On the other hand, I think I will replace most (if not all) of electrolytic caps, as this is a very aged piece of equipment. I am not sure about oil capacitors though. I have no experience with them at all. Should they be treated as electrolytic caps?

Thank you for your help.
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Offline madires

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Re: What's this please? (Component Advice)
« Reply #1196 on: June 13, 2017, 09:36:17 am »
As far as I know, please someone correct me if I'm wrong, those capacitors are extremely reliable and unless physically damaged or sustained dielectric arcing, they shouldn't really need replacing. (Please get someone else to confirm this)

Yup!
 

Offline rsjsouza

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Re: What's this please? (Component Advice)
« Reply #1197 on: June 15, 2017, 10:05:16 pm »
Thank you very much for confirmation and new info (tolerances). I learned something again :)
Yes, I read somewhere else, that polystyrene capacitors are very reliable and nowadays are used only for special applications. I will not replace them then  :-+
On the other hand, I think I will replace most (if not all) of electrolytic caps, as this is a very aged piece of equipment. I am not sure about oil capacitors though. I have no experience with them at all. Should they be treated as electrolytic caps?

Thank you for your help.
"Oil capacitors" are usually the starter capacitors used with electric motors. In older radios and TVs, the capacitors are made of oiled paper (commonly called "paper capacitors"), which tend to dry over the years as well. In this case there is a chance you have to replace them as well.

https://antiqueradio.org/recap.htm


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Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 
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Offline Gadgetman

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Re: What's this please? (Component Advice)
« Reply #1198 on: June 16, 2017, 12:47:58 am »
Hi rsjsouza,

First of all I like your avatar :) and thank you for your reply.

Attached is a photo of an oil capacitor I have in this old oscilloscope. My question remains: should I treat them like electrolytic capacitors or should I try to find an oil capacitor? As I explained before, I have no experience with them.
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Offline rsjsouza

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Re: What's this please? (Component Advice)
« Reply #1199 on: June 16, 2017, 07:24:10 pm »
Thanks for the photograph. I now fully understand your question: I would replace them with modern ceramic or polyester film capacitors that will never go bad. Just watch the working voltage.

I found the other reference I couldn't find yesterday:
http://www.justradios.com/captips.html
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Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 
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