Post questions or comments about the A12 here.
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- Output transformer spacers
by mrgrateful » Thu Mar 24, 2011 1:57 am
- 1 Replies
- 1110 Views
- Last post by tpryan
Thu Mar 24, 2011 2:15 pm
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- Strange Sound on Last 2 Gain Settings
by Black Magic » Wed Feb 16, 2011 9:21 pm
- 5 Replies
- 2091 Views
- Last post by Black Magic
Wed Feb 23, 2011 7:07 pm
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- Possible wrong part for Trimmer Potentionmeter - A12
by jimbo2k » Mon Jan 24, 2011 8:29 am
- 2 Replies
- 1478 Views
- Last post by jimbo2k
Mon Jan 24, 2011 12:04 pm
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- A12 output control not working
by Bryce » Wed Jan 19, 2011 1:00 pm
- 1 Replies
- 1187 Views
- Last post by tpryan
Fri Jan 21, 2011 3:25 pm
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- A12 v1.4 i got used doesn't seem to work...
by scottwilson » Sat Dec 18, 2010 7:49 pm
- 1 Replies
- 1176 Views
- Last post by tpryan
Mon Dec 27, 2010 3:39 pm
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- barely passing signal, distorted when cranked
by Arnaeve » Mon Dec 20, 2010 10:34 pm
- 1 Replies
- 1169 Views
- Last post by tpryan
Mon Dec 27, 2010 3:38 pm
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- A12 Calibration Question
by GabeWax » Sat Dec 25, 2010 10:41 am
- 1 Replies
- 1168 Views
- Last post by tpryan
Mon Dec 27, 2010 3:36 pm
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- Is A12 supposed to sound like this? Audio clip inside
by brad347 » Wed Dec 15, 2010 2:58 pm
- 0 Replies
- 1965 Views
- Last post by brad347
Wed Dec 15, 2010 2:58 pm
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- Puzzling issue w/ an A12 that used to work properly *solved*
by brad347 » Sat Dec 04, 2010 12:01 pm
- 1 Replies
- 1202 Views
- Last post by brad347
Tue Dec 14, 2010 2:29 pm
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- SC25 Opt Amp Biasing
by jason baliban » Fri Dec 10, 2010 10:02 pm
- 1 Replies
- 1200 Views
- Last post by jason baliban
Mon Dec 13, 2010 6:30 pm
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- Finished my first A12
by jmettam » Tue Nov 16, 2010 8:41 am
- 1 Replies
- 1308 Views
- Last post by jmettam
Sun Dec 12, 2010 5:24 pm
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- A12 U1 polarity
by derxbrax » Fri Oct 15, 2010 9:12 pm
- 8 Replies
- 2016 Views
- Last post by tpryan
Fri Nov 26, 2010 4:38 pm
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- Hot opamps, high neg current draw
by rtroast » Tue Sep 28, 2010 9:13 am
- 7 Replies
- 2145 Views
- Last post by tpryan
Tue Nov 16, 2010 2:31 pm
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- Cinemag CMOQ-2S Loose parts?
by jmettam » Sun Nov 14, 2010 5:15 am
- 1 Replies
- 1616 Views
- Last post by jmettam
Sun Nov 14, 2010 6:52 am
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- A12 Issue: Low gain and only high frequencies
by trevor » Sat Jun 19, 2010 10:08 pm
- 11 Replies
- 2551 Views
- Last post by DaveR
Wed Sep 29, 2010 3:06 pm
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- A12 & N72 Shootout?
by alvagoldbook » Mon Jul 26, 2010 9:34 am
- 2 Replies
- 1808 Views
- Last post by lynyrd
Thu Sep 23, 2010 10:08 am
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- a12, distortion and noise
by guitarguy1555 » Sat Aug 28, 2010 11:23 pm
- 1 Replies
- 1256 Views
- Last post by tpryan
Wed Sep 15, 2010 3:01 pm
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- A12 Transformer alternatives
by Old Troll » Mon Aug 23, 2010 9:03 am
- 3 Replies
- 3431 Views
- Last post by Old Troll
Fri Aug 27, 2010 8:29 am
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- Just built my 2nd A12 and it works great
by ffarrell » Tue Aug 10, 2010 8:11 pm
- 1 Replies
- 1163 Views
- Last post by tpryan
Wed Aug 11, 2010 6:11 am
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- Squealing and moaning A12
by cAPSLOCK » Fri Aug 06, 2010 2:38 am
- 6 Replies
- 1917 Views
- Last post by tpryan
Wed Aug 11, 2010 6:08 am
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- Reversed polarity on C13- problems
by mikea12 » Tue Jul 20, 2010 10:23 pm
- 5 Replies
- 1569 Views
- Last post by tpryan
Fri Jul 23, 2010 8:00 am
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- Intermittent A12 and a Quiet A12
by room4studios » Mon Jun 28, 2010 2:48 am
- 5 Replies
- 1854 Views
- Last post by room4studios
Tue Jul 06, 2010 9:17 am
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- Output transformer wires crossed over
by room4studios » Fri Jun 25, 2010 1:37 pm
- 1 Replies
- 978 Views
- Last post by tpryan
Fri Jun 25, 2010 4:54 pm
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- Forgot the Grey Fish Paper A12
by room4studios » Mon Jun 14, 2010 12:29 pm
- 2 Replies
- 1664 Views
- Last post by Todzilla
Thu Jun 17, 2010 10:45 am
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- SC10
by room4studios » Thu Jun 17, 2010 2:12 am
- 1 Replies
- 1360 Views
- Last post by tpryan
Thu Jun 17, 2010 7:28 am
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- A12 Few questions...
by room4studios » Tue Jun 15, 2010 12:03 pm
- 2 Replies
- 1259 Views
- Last post by room4studios
Wed Jun 16, 2010 11:12 am
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- Install SC25
by adrianloera » Sat Jun 05, 2010 2:49 pm
- 2 Replies
- 1273 Views
- Last post by tpryan
Sun Jun 06, 2010 9:27 pm
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- incompatibility issues when mixing V1.4 and V1.6.1 ?
by limey222 » Wed May 26, 2010 1:03 pm
- 4 Replies
- 1297 Views
- Last post by tpryan
Thu May 27, 2010 8:08 am
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- Heatsink screw orientation - important?
by shane » Tue May 18, 2010 5:28 pm
- 3 Replies
- 1315 Views
- Last post by shane
Tue May 18, 2010 8:46 pm
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- High noise floor & low gain on one A12
by Jezza » Sun May 16, 2010 12:25 am
- 6 Replies
- 1697 Views
- Last post by Jezza
Mon May 17, 2010 6:13 pm
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- Designing an output pad for the A12
by RalphNicastro » Fri Apr 16, 2010 10:43 am
- 5 Replies
- 1875 Views
- Last post by RalphNicastro
Mon May 03, 2010 1:49 pm
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- c4 and c5 tantalums
by chriscavell » Sun Apr 25, 2010 5:30 am
- 2 Replies
- 1239 Views
- Last post by chriscavell
Mon Apr 26, 2010 3:19 pm
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- A12 Accidentally reverse c13 !!!
by the3030club » Sun Dec 13, 2009 2:26 pm
- 5 Replies
- 1899 Views
- Last post by tpryan
Wed Mar 17, 2010 2:29 pm
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- problems
by Sean S » Tue Mar 16, 2010 5:01 am
- 1 Replies
- 1052 Views
- Last post by tpryan
Tue Mar 16, 2010 6:24 am
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- can only get r25 and r29 up to 11 volts
by Arnaeve » Sun Mar 14, 2010 6:29 pm
- 1 Replies
- 856 Views
- Last post by Arnaeve
Sun Mar 14, 2010 7:04 pm
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- getting resistance of 6.9 on pins 1 and 2 of j7
by Arnaeve » Sat Mar 13, 2010 8:32 pm
- 1 Replies
- 848 Views
- Last post by tpryan
Sun Mar 14, 2010 11:08 am
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- Rev 1.6 and 1.7 differences?
by pedalboy » Thu Mar 04, 2010 6:21 pm
- 1 Replies
- 1066 Views
- Last post by tpryan
Fri Mar 05, 2010 12:52 pm
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- 2 A12's 1 not making strange noises
by daveseviltwin » Thu Feb 25, 2010 1:52 pm
- 7 Replies
- 1863 Views
- Last post by daveseviltwin
Tue Mar 02, 2010 6:02 pm
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- update
by daveseviltwin » Tue Mar 02, 2010 2:38 pm
- 0 Replies
- 1008 Views
- Last post by daveseviltwin
Tue Mar 02, 2010 2:38 pm
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- older A12 too hot output
by LamontGrady » Sun Feb 28, 2010 11:14 am
- 3 Replies
- 1357 Views
- Last post by tpryan
Mon Mar 01, 2010 6:10 pm
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- A12 intermittent
by packagebear » Mon Feb 01, 2010 12:12 pm
- 2 Replies
- 1230 Views
- Last post by packagebear
Wed Feb 10, 2010 7:43 pm
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- Help any Houston area A12's?
by crashandbash » Thu Feb 04, 2010 11:18 am
- 0 Replies
- 987 Views
- Last post by crashandbash
Thu Feb 04, 2010 11:18 am
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- U1: Pin4 - Pin6 measuring weird voltage
by hduncan » Wed Jan 06, 2010 5:51 pm
- 4 Replies
- 1772 Views
- Last post by tpryan
Wed Jan 06, 2010 8:27 pm
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- A12 V 1.4. No Phantom
by Bmushal » Sun Sep 27, 2009 7:05 pm
- 2 Replies
- 1210 Views
- Last post by Bmushal
Mon Sep 28, 2009 10:58 am
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- Two A12's not working...PLEASE HELP!!!
by jamesbryant » Fri Sep 25, 2009 7:09 pm
- 2 Replies
- 1306 Views
- Last post by tpryan
Mon Sep 28, 2009 10:29 am
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- A12 quit working after 6 months
by budger » Tue Sep 22, 2009 8:05 am
- 2 Replies
- 1506 Views
- Last post by budger
Sun Sep 27, 2009 8:44 am
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- IC Op-Amp questions.
by kevink » Fri Sep 18, 2009 2:18 pm
- 4 Replies
- 1743 Views
- Last post by tpryan
Wed Sep 23, 2009 7:59 am
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- First seventh circle build
by guitron » Tue Jun 16, 2009 3:09 am
- 1 Replies
- 1448 Views
- Last post by Mylithra
Fri Sep 18, 2009 8:41 am
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- 1.4 A12 BOM
by analogical » Wed Jul 30, 2008 8:21 pm
- 1 Replies
- 1083 Views
- Last post by Philo
Sat Sep 05, 2009 6:02 pm
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- How flat is the freq response of the A12?
by mojojo » Thu May 28, 2009 11:19 am
- 3 Replies
- 1676 Views
- Last post by innerpeaz
Sat Aug 15, 2009 10:31 am
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