Request help to identify transistors

[Richard_Parker]

I am trying to identift 3 transistors from the servo section of a
power amplifier. They are TO92 cases and all 3 have a National
Semiconductor
logo on them. They date from about 1981

They are marked as follows:

851
J176

908
J211

803
J211

I have looked them up as 2N851, 2N908 etc and only the 851 matches the
case style. The other 2 are completely different. Any assistace
appreciated

RP

 

[Fred Abse]

On Wed, 15 Oct 2003 10:53:26 -0700, Richard_Parker wrote:

They are marked as follows:

851
J176

908
J211

803
J211

I have looked them up as 2N851, 2N908 etc and only the 851 matches the
case style. The other 2 are completely different. Any assistace
appreciated

From 1987 Intersil data book:


J176 - P-channel JFET, TO-92, Rds(on)max 250 ohm, Vp 1V - 4V, Igss 1nA, BVgss
30V, Id(off) -1nA, Idss 2V - 20V


J211 - N-channel JFET, TO-92, gfs 7000 umho (Usiemens), Idss 7mA - 20mA,
Vp 2.5V - 4.5V, Igss -100pA max, BVgss -25V min, Ciss 4pF typical, Crss
1pF typical, en 10nV per root Hz typical @ 1kHz


Errors and typos excepted

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[Les McCready]

Hi
These parts are JFET's
You can find the specifications in the Fairchild Semiconductor web site.

"Richard_Parker" <richard_parker@sympatico.ca> wrote in message
news:c2cad914.0310150953.5a5dae97@posting.google.com...

I am trying to identift 3 transistors from the servo section of a
power amplifier. They are TO92 cases and all 3 have a National
Semiconductor
logo on them. They date from about 1981

They are marked as follows:

851
J176

908
J211

803
J211

I have looked them up as 2N851, 2N908 etc and only the 851 matches the
case style. The other 2 are completely different. Any assistace
appreciated

RP

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[Chaos Master]

Richard_Parker engraved with a +2 athame:

I am trying to identift 3 transistors from the servo section of a
power amplifier. They are TO92 cases and all 3 have a National
Semiconductor
logo on them. They date from about 1981

They are marked as follows:

851
J176

908
J211

803
J211

I have looked them up as 2N851, 2N908 etc and only the 851 matches the
case style. The other 2 are completely different. Any assistace
appreciated

They're JFET's. J176 and J211 respectively.
--
Please reply in the group or ask for a valid e-mail/ICQ/MSN/YM/IRC address.

 

[Watson A.Name - "Watt Sun]

In article <c2cad914.0310150953.5a5dae97@posting.google.com>,
richard_parker@sympatico.ca mentioned...

I am trying to identift 3 transistors from the servo section of a
power amplifier. They are TO92 cases and all 3 have a National
Semiconductor
logo on them. They date from about 1981

They are marked as follows:

851
J176

908
J211

803
J211

I have looked them up as 2N851, 2N908 etc and only the 851 matches the
case style. The other 2 are completely different. Any assistace
appreciated

The first one is http://www.fairchildsemi.com/pf/J1/J176.html
The last two are http://www.fairchildsemi.com/pf/J2/J211.html

RP

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[Richard_Parker]

Thanks to everyone who responded. They are JFETS. Now that I know what
they are their placement and orientation now make sense.

RP

richard_parker@sympatico.ca mentioned...
I am trying to identify 3 transistors from the servo section of a
power amplifier. They are TO92 cases and all 3 have a National
Semiconductor
logo on them. They date from about 1981

They are marked as follows:

851
J176

908
J211

803
J211

I have looked them up as 2N851, 2N908 etc and only the 851 matches the
case style. The other 2 are completely different. Any assistace
appreciated

The first one is http://www.fairchildsemi.com/pf/J1/J176.html
The last two are http://www.fairchildsemi.com/pf/J2/J211.html

RP