Using the AD844 as an I/V - Page 29 - diyAudio
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Old 26th February 2013, 04:37 PM   #281
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Hmm, TINA doesn't have the 2SK246 or 2SJ103 FETs

2SK246 Semiconductor (Transistor, diode, IC) Cross reference

Lists 2N5457, 2SK330 as replacements for the 246 and 2N5460, 2N5463, 2SJ105 as replacements for the 103

TINA does have the 2N5457 (for the K246) and 2N5460 (for the J103)

2SK246
2SK246 FET 388279_DS.pdf

2SJ103
2SJ103_datasheet_en_20071101.pdf

...
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Old 26th February 2013, 04:49 PM   #282
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Quote:
Originally Posted by AudioLapDance View Post
Hmm, TINA doesn't have the 2SK246 or 2SJ103 FETs

2SK246 Semiconductor (Transistor, diode, IC) Cross reference

Lists 2N5457, 2SK330 as replacements for the 246 and 2N5460, 2N5463, 2SJ105 as replacements for the 103

TINA does have the 2N5457 (for the K246) and 2N5460 (for the J103)

2SK246
Attachment 332846

2SJ103
Attachment 332850

...
If you can find the Spice model for those transistors, it's easy to create a macro for them. Let me know and I can help.
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Old 26th February 2013, 04:56 PM   #283
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...

TINA has no 2SC2240

Replacements: 2SC2362, 2SC2389, 2SC2459, 2SC2631...32
BFR86 2N2509
TINA has none of these


TINA has no 2SA970

Replacments: 2SA1038, 2SA1049, 2SA1123, 2SA1136
2SB789 KT632B
TINA has none of these

Other replacements for the 2SC2240 NPN and 2SA970 PNP?
Thanks,
Jeff

2SC2240
2SC2240 npn 968.pdf

2SA970
2SA970 pnp 962.pdf
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Old 26th February 2013, 05:04 PM   #284
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.MODEL 2SA970 PNP (IS=9.98557F BF=477.115 NF=965.739M VAF=64.7 IKF=116.959M
+ ISE=2.13187F NE=1.27276 BR=385.069M IKR=308.018 ISC=13.4194P RC=7.03858
+ CJE=2P MJE=500M CJC=19.116P VJC=749.982M MJC=498.685M TF=1.49138N XTF=500M
+ VTF=10 ITF=10.0655M TR=10N )
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Old 26th February 2013, 05:04 PM   #285
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.MODEL 2SC2240 NPN (IS=9.98557F BF=444.22 NF=965.739M VAF=439.144 IKF=99.567M
+ ISE=6.48962F NE=1.29179 BR=425.865M IKR=954.972 ISC=539.648P RC=168.128M
+ CJE=2P MJE=500M CJC=11.7089P VJC=750.026M MJC=499.123M TF=1.41635N
+ XTF=499.995M VTF=10 ITF=10.055M TR=10N )
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Old 26th February 2013, 05:06 PM   #286
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Save the text as a .lib file. In Tina, go to Tools>New Macro Wizard and follow the directions.
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Old 26th February 2013, 05:10 PM   #287
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Quote:
Originally Posted by dirkwright View Post
I don't agree that "cable filtering", by which I assume you mean filtering the signal at the cable connector on the chassis, is a serious weakness nor a serious problem for well designed cables. I use Canare Star Quad cable, which is designed to dramatically reduce RF interference. See the attached document for reference.
That will improve matters for the signal cables I agree, assuming you're using 360 degree termination at the shell of the XLRs. However a chain is only as strong as its weakest link - what kind of cable are you using for mains supply? I see no mains inlet filtering.
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Last edited by abraxalito; 26th February 2013 at 05:12 PM.
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Old 26th February 2013, 05:14 PM   #288
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Quote:
Originally Posted by dirkwright View Post
.MODEL 2SC2240 NPN (IS=9.98557F BF=444.22 NF=965.739M VAF=439.144 IKF=99.567M
+ ISE=6.48962F NE=1.29179 BR=425.865M IKR=954.972 ISC=539.648P RC=168.128M
+ CJE=2P MJE=500M CJC=11.7089P VJC=750.026M MJC=499.123M TF=1.41635N
+ XTF=499.995M VTF=10 ITF=10.055M TR=10N )
Dear sir, where did you find these fine models? Teach a man to fish and all ...
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Old 26th February 2013, 05:20 PM   #289
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Quote:
Originally Posted by georgehifi View Post
...I'm very interested to see what the input (with & without the 100k) and output impedances are.
I may try this straight from the TZ of the AD844 next weekend
...
PCM1704 AD844 CB IV + buffer.png

By "straight from the TZ" did you mean:

PCM1704 AD844 CB IV + buffer connect.png
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Old 26th February 2013, 05:24 PM   #290
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Quote:
Originally Posted by AudioLapDance View Post
Dear sir, where did you find these fine models? Teach a man to fish and all ...
Extensive Google searching. A lot of them are right here on DIYAudio, but buried deep...
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