Post questions or comments about the J99 here.
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- Parts for AD797 vs. 990C
by markmazoo » Tue Jan 16, 2007 5:33 pm
- 5 Replies
- 2163 Views
- Last post by markmazoo
Sun Mar 18, 2007 11:19 am
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- john hardy OK?
by markmazoo » Thu Feb 01, 2007 5:06 pm
- 6 Replies
- 2411 Views
- Last post by markmazoo
Sun Mar 18, 2007 11:08 am
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- No sound output
by markmazoo » Sat Feb 17, 2007 2:08 pm
- 6 Replies
- 1771 Views
- Last post by markmazoo
Sun Mar 18, 2007 10:59 am
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- No Headroom on my J99/990c
by midimonster » Tue Mar 06, 2007 7:30 am
- 1 Replies
- 1230 Views
- Last post by midimonster
Wed Mar 07, 2007 10:44 pm
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- Bias Troubles
by Pajbassman81 » Thu Feb 22, 2007 8:51 pm
- 4 Replies
- 1650 Views
- Last post by markwayne
Mon Mar 05, 2007 6:00 am
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- Op-Amps No longer needed for J99?
by wshaw » Sun Dec 03, 2006 6:48 pm
- 7 Replies
- 2623 Views
- Last post by tpryan
Wed Feb 21, 2007 12:14 pm
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- No signal passes...just alot of high freq noise.
by packagebear » Wed Jan 24, 2007 8:50 pm
- 6 Replies
- 2158 Views
- Last post by packagebear
Wed Feb 14, 2007 7:32 pm
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- diode leads
by teleharmonic » Tue Aug 08, 2006 8:33 am
- 13 Replies
- 3974 Views
- Last post by owen.curtin
Fri Feb 09, 2007 10:03 am
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- securing the 990c OpAmps
by jwschaff » Wed Jan 17, 2007 2:05 pm
- 5 Replies
- 1884 Views
- Last post by tpryan
Thu Jan 18, 2007 8:03 pm
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- Too Much Gain from R17
by jwschaff » Wed Jan 17, 2007 12:14 pm
- 2 Replies
- 1149 Views
- Last post by tpryan
Thu Jan 18, 2007 8:00 pm
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- 1st rev Assembly instructions
by bgc » Fri Dec 08, 2006 9:34 pm
- 6 Replies
- 1940 Views
- Last post by tele_player
Wed Dec 13, 2006 5:11 pm
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- U3 voltage
by mozart » Thu Oct 26, 2006 6:09 pm
- 0 Replies
- 1092 Views
- Last post by mozart
Thu Oct 26, 2006 6:09 pm
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- Voltage problems with 990c installed
by jwschaff » Sun Sep 03, 2006 10:47 am
- 6 Replies
- 1963 Views
- Last post by jwschaff
Tue Oct 24, 2006 9:36 am
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- J99's bias adjustment not happening
by thebearingedge » Sun Oct 15, 2006 9:46 pm
- 8 Replies
- 2421 Views
- Last post by thebearingedge
Fri Oct 20, 2006 10:30 am
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- All I need are op amps?
by trevor » Tue Aug 22, 2006 3:02 pm
- 2 Replies
- 1395 Views
- Last post by trevor
Wed Aug 23, 2006 6:22 am
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- John Hardy 990C op-amp
by goldcut » Tue May 16, 2006 9:29 pm
- 4 Replies
- 2513 Views
- Last post by glide 1
Sat Aug 19, 2006 11:15 pm
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- J6 J8 jumper settings
by billkahler » Sun Jul 23, 2006 8:46 am
- 5 Replies
- 1818 Views
- Last post by tpryan
Tue Aug 08, 2006 4:41 pm
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- passing signal even with gain and trim down
by billkahler » Mon Jul 24, 2006 8:21 am
- 1 Replies
- 1105 Views
- Last post by billkahler
Mon Jul 24, 2006 9:31 am
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- BOM/board/schem. discrepancies, other stuff
by billkahler » Thu Jul 20, 2006 3:06 pm
- 4 Replies
- 1474 Views
- Last post by tpryan
Fri Jul 21, 2006 6:36 am
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- very basic soldering question
by Sonic Idiot » Tue Jul 18, 2006 7:53 pm
- 1 Replies
- 1177 Views
- Last post by tpryan
Wed Jul 19, 2006 12:54 pm
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- Lots of RF at full gain - is this common?
by eframp » Mon Jul 10, 2006 8:50 pm
- 3 Replies
- 1481 Views
- Last post by tpryan
Thu Jul 13, 2006 10:39 am
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- J99 clipping?
by pilahaka » Thu Jun 22, 2006 1:47 pm
- 4 Replies
- 1619 Views
- Last post by tpryan
Fri Jun 30, 2006 7:36 am
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- J99 - What would cause C20 to smoke?
by Randyman... » Thu Jun 01, 2006 2:01 pm
- 6 Replies
- 1880 Views
- Last post by tele_player
Mon Jun 05, 2006 12:35 pm
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- Dialing in my J99
by jmoore » Thu Apr 20, 2006 5:31 pm
- 1 Replies
- 1352 Views
- Last post by tpryan
Mon Apr 24, 2006 4:13 pm
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- J99 Trade
by Nu-tra » Sat Apr 01, 2006 6:35 pm
- 2 Replies
- 1653 Views
- Last post by Nu-tra
Wed Apr 12, 2006 3:05 pm
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- SERIOUS white noise!
by anoxmusic » Sun Mar 26, 2006 2:31 am
- 3 Replies
- 1573 Views
- Last post by tpryan
Mon Apr 10, 2006 8:03 am
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- A song recorded with the "J99" !!
by deadboy » Sun Apr 02, 2006 3:25 am
- 0 Replies
- 1723 Views
- Last post by deadboy
Sun Apr 02, 2006 3:25 am
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- It's Alive!!!!
by deadboy » Sun Mar 26, 2006 10:36 pm
- 3 Replies
- 1738 Views
- Last post by Nu-tra
Sat Apr 01, 2006 9:35 am
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- 2 X Pairs of 990C OpAmps for sale
by yavuz » Sun Mar 05, 2006 3:22 pm
- 0 Replies
- 1407 Views
- Last post by yavuz
Sun Mar 05, 2006 3:22 pm
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- Voltage problem with J99 setup
by mikelevitt » Tue Feb 21, 2006 11:45 pm
- 10 Replies
- 2626 Views
- Last post by dkatz42
Fri Feb 24, 2006 8:26 am
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- Smoke from Hardy 990c
by mrosso » Sat Feb 04, 2006 11:15 pm
- 1 Replies
- 1412 Views
- Last post by tpryan
Tue Feb 07, 2006 9:50 am
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- Dear Tim.....
by runamuck » Thu Feb 02, 2006 5:42 pm
- 3 Replies
- 1813 Views
- Last post by tpryan
Tue Feb 07, 2006 9:45 am
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- Compare J99 to True Precision 8?
by wshaw » Fri Feb 03, 2006 12:47 pm
- 1 Replies
- 1576 Views
- Last post by jmoore
Sun Feb 05, 2006 2:06 pm
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- Op Amp Question
by runamuck » Fri Dec 09, 2005 4:49 pm
- 4 Replies
- 1998 Views
- Last post by Reggie
Thu Jan 19, 2006 8:53 pm
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- Trasformers for the J99
by Andy P » Fri Dec 30, 2005 12:53 pm
- 2 Replies
- 1653 Views
- Last post by tpryan
Mon Jan 02, 2006 10:23 am
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- J99 buzz
by kid » Mon Jun 06, 2005 11:07 am
- 27 Replies
- 8794 Views
- Last post by tpryan
Tue Dec 27, 2005 6:25 pm
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- J99 vs. JLM99V
by jimbob » Wed Dec 21, 2005 9:12 am
- 0 Replies
- 1613 Views
- Last post by jimbob
Wed Dec 21, 2005 9:12 am
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- No Sound
by Nu-tra » Wed Nov 30, 2005 8:00 pm
- 5 Replies
- 1678 Views
- Last post by tele_player
Thu Dec 01, 2005 8:49 am
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- LOW LEVEL SIGNAL ON MY J99!!!!!!!!!!!
by agno » Sat Nov 26, 2005 9:40 am
- 27 Replies
- 6810 Views
- Last post by agno
Tue Nov 29, 2005 5:13 pm
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- Setting Voltage and Jumpers
by Nu-tra » Mon Nov 28, 2005 10:06 pm
- 8 Replies
- 2602 Views
- Last post by Nu-tra
Tue Nov 29, 2005 5:10 pm
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- j99 voltage off at pin5, possible broken R28????
by yavuz » Wed Nov 09, 2005 8:48 pm
- 11 Replies
- 2864 Views
- Last post by yavuz
Fri Nov 11, 2005 4:25 pm
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- J99 signal too hot !
by veetguitar » Sun Sep 11, 2005 1:26 am
- 15 Replies
- 5218 Views
- Last post by tele_player
Mon Sep 19, 2005 4:49 am
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- J99 on steroids
by linclink » Sat Feb 19, 2005 6:09 pm
- 9 Replies
- 3872 Views
- Last post by Sean Halley
Tue Aug 02, 2005 8:10 pm
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- Hot 990c
by debasah » Tue Jul 19, 2005 11:38 am
- 2 Replies
- 1439 Views
- Last post by tele_player
Tue Jul 19, 2005 1:08 pm
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- Op Amp Selection
by Geoff Waddington » Sat Jun 18, 2005 4:38 pm
- 1 Replies
- 1459 Views
- Last post by tele_player
Mon Jun 20, 2005 5:47 pm
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- j99 full kit inc opamp
by lowsing » Tue May 03, 2005 10:13 am
- 8 Replies
- 2910 Views
- Last post by tpryan
Mon May 09, 2005 8:21 am
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- voltage problems
by ct » Mon Apr 18, 2005 12:02 pm
- 2 Replies
- 1271 Views
- Last post by ct
Mon Apr 18, 2005 3:07 pm
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- input impedances??
by deadboy » Sat Apr 16, 2005 1:48 am
- 2 Replies
- 1495 Views
- Last post by deadboy
Mon Apr 18, 2005 1:25 am
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- J99 power-up adjustments
by dkatz42 » Fri Oct 29, 2004 9:03 pm
- 4 Replies
- 1893 Views
- Last post by chikkenguy
Tue Mar 08, 2005 1:25 pm
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- Mill-max pin. Counter part, which one???
by Jarek » Thu Feb 17, 2005 2:20 am
- 0 Replies
- 1220 Views
- Last post by Jarek
Thu Feb 17, 2005 2:20 am
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