Jfet part number

mmerig · 19th August 2007, 07:55 PM

Anyone know an equivalent for a jfet with the following stamped on the top? It's in a TO-18 case with 4 legs (one leg is to the shield)

S11 0166 710

The S is bigger than the numbers

The schematic labels it as a D214.

I've searched the web, the Mouser catalog, and this site. No luck with either number anywhere.

Thanks

Leolabs · 22nd August 2007, 02:22 AM

Sure it's a JFET???

mmerig · 23rd August 2007, 02:14 PM

Woops, it's probably a MOSFET now that I look at the schematic symbol again. It shows S, D, and G at the legs, and a hand-drawn symbol that looks like a MOSFET. It's in an SAE 5000, and is about 30 years old.

Thanks.

Geek · 23rd August 2007, 08:23 PM

Looks like a house number.

If it's a MOSFET and the schematic labels it as "D", like diode, is it wired as a CCS? If so, then you can replace it with many of even ballapark characteristics.

mmerig · 23rd August 2007, 09:48 PM

The D214 is probably a house number (diodes are labeled CR on the schematic), but I thought the S11 0166 710 was a real part number. The device is labeled Q5 and Q6 (one for each channel), and it looks like a gate. It is activated by a switch that allows one to hear what noise is being removed by the impulse filter.

Thanks for the help -- I thought it would be easier than this to figure out a replacement. I am still troubleshooting the unit (lightening hit very near our house recently) and I think I have what I really need on order, and may not have to know a replacement for the fet.

I'll bump this up if the need arises.

mmerig · 23rd September 2007, 04:19 PM

Well, I got one channel working with some new IC's, but one of the S11 0166 710 fets is bad after all (they are both the same on each channel). I think they are N-channel MOSFETs, and they seem to carry a signal. The invert switch apparently takes them out of the circuit, but then only the clicks and pops can be heard (but at least they sound the same on each channel).

I could upload the schematic and perhaps someone could suggest a replacement. The power supply is 16 volts, and the shield leg is wired and carries -15 volts (actual measurement, and as the schematic shows).

Does anyone want to take a crack at it?

19th August 2007, 07:55 PM	#1
mmerig diyAudio Member Join Date: Jan 2005 Location: south east Idaho, Teton Basin	Jfet part number Anyone know an equivalent for a jfet with the following stamped on the top? It's in a TO-18 case with 4 legs (one leg is to the shield) S11 0166 710 The S is bigger than the numbers The schematic labels it as a D214. I've searched the web, the Mouser catalog, and this site. No luck with either number anywhere. Thanks

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22nd August 2007, 02:22 AM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Sure it's a JFET???

23rd August 2007, 02:14 PM	#3
mmerig diyAudio Member Join Date: Jan 2005 Location: south east Idaho, Teton Basin	Woops, it's probably a MOSFET now that I look at the schematic symbol again. It shows S, D, and G at the legs, and a hand-drawn symbol that looks like a MOSFET. It's in an SAE 5000, and is about 30 years old. Thanks.

23rd August 2007, 08:23 PM	#4
Geek diyAudio Member Join Date: Sep 2004	Looks like a house number. If it's a MOSFET and the schematic labels it as "D", like diode, is it wired as a CCS? If so, then you can replace it with many of even ballapark characteristics.

23rd August 2007, 09:48 PM	#5
mmerig diyAudio Member Join Date: Jan 2005 Location: south east Idaho, Teton Basin	The D214 is probably a house number (diodes are labeled CR on the schematic), but I thought the S11 0166 710 was a real part number. The device is labeled Q5 and Q6 (one for each channel), and it looks like a gate. It is activated by a switch that allows one to hear what noise is being removed by the impulse filter. Thanks for the help -- I thought it would be easier than this to figure out a replacement. I am still troubleshooting the unit (lightening hit very near our house recently) and I think I have what I really need on order, and may not have to know a replacement for the fet. I'll bump this up if the need arises.

23rd September 2007, 04:19 PM	#6
mmerig diyAudio Member Join Date: Jan 2005 Location: south east Idaho, Teton Basin	Well, I got one channel working with some new IC's, but one of the S11 0166 710 fets is bad after all (they are both the same on each channel). I think they are N-channel MOSFETs, and they seem to carry a signal. The invert switch apparently takes them out of the circuit, but then only the clicks and pops can be heard (but at least they sound the same on each channel). I could upload the schematic and perhaps someone could suggest a replacement. The power supply is 16 volts, and the shield leg is wired and carries -15 volts (actual measurement, and as the schematic shows). Does anyone want to take a crack at it?

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