ask your general tube related questions here
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- Tube identification time
by Proschuno » Wed Oct 03, 2012 8:34 pm
- 7 Replies
- 3134 Views
- Last post by EWBrown
Thu May 09, 2013 9:15 am
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- Any transformer experts? Dual secondaries vs taps
by glen » Sat Feb 23, 2013 11:00 am
- 1 Replies
- 1313 Views
- Last post by Impmon
Wed May 08, 2013 10:00 pm
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- Bias drift. How much is acceptable?
by Blair » Wed May 08, 2013 6:03 am
- 2 Replies
- 1395 Views
- Last post by 20to20
Wed May 08, 2013 11:16 am
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- Transformer orientation?
by Blair » Sun Apr 28, 2013 6:50 am
- 15 Replies
- 4136 Views
- Last post by Blair
Mon May 06, 2013 8:26 pm
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- Suggestions for Revisions?
by kt88pppamp » Sat May 04, 2013 9:43 pm
- 6 Replies
- 2005 Views
- Last post by kt88pppamp
Sun May 05, 2013 7:34 pm
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- Resistance on center tap to drop B+ a touch?
by Blair » Fri May 03, 2013 8:21 pm
- 2 Replies
- 1313 Views
- Last post by Blair
Sat May 04, 2013 6:19 am
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- Edcor transformers
by coolhandjjl » Sun Apr 28, 2013 2:16 pm
- 11 Replies
- 3249 Views
- Last post by Geek
Thu May 02, 2013 7:57 pm
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- Switching supplies and filaments?
by Blair » Sun Mar 25, 2012 4:58 pm
- 9 Replies
- 3426 Views
- Last post by soundbrigade
Wed May 01, 2013 7:19 am
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- Need help testing 3B22 rectifier
by kunaphil » Wed Apr 24, 2013 7:14 pm
- 3 Replies
- 1585 Views
- Last post by kunaphil
Sat Apr 27, 2013 3:30 pm
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- Interest in Science, Technology, Engineering, and Math
by kt88pppamp » Wed Apr 24, 2013 9:45 pm
- 8 Replies
- 2154 Views
- Last post by coolhandjjl
Fri Apr 26, 2013 8:57 am
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- Bias balance pot?
by Blair » Sat Feb 09, 2013 9:20 pm
- 17 Replies
- 5007 Views
- Last post by Blair
Wed Apr 10, 2013 10:01 pm
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- Sowter Output Iron
by Blair » Mon Mar 04, 2013 8:59 pm
- 16 Replies
- 4593 Views
- Last post by Blair
Tue Apr 09, 2013 8:38 pm
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- 600VAC 40uf cap source
by Blair » Thu Apr 04, 2013 10:05 am
- 8 Replies
- 2074 Views
- Last post by battradio
Fri Apr 05, 2013 11:37 pm
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- Using a CT transformer for dual positive rails?
by Blair » Thu Apr 04, 2013 7:50 am
- 4 Replies
- 1427 Views
- Last post by battradio
Thu Apr 04, 2013 12:38 pm
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- Finished my Eico ST-70
by DeathRex » Wed Apr 03, 2013 3:46 pm
- 0 Replies
- 1909 Views
- Last post by DeathRex
Wed Apr 03, 2013 3:46 pm
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- RIAA board on eBay
by Blair » Tue Mar 19, 2013 6:15 am
- 7 Replies
- 2643 Views
- Last post by Blair
Tue Apr 02, 2013 1:39 pm
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- Power supply umbilical connectors?
by Blair » Thu Mar 21, 2013 8:26 pm
- 7 Replies
- 2184 Views
- Last post by Thermion
Tue Apr 02, 2013 5:57 am
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- Power Transformer ratings
by glen » Fri Mar 29, 2013 8:40 am
- 6 Replies
- 1650 Views
- Last post by kheper
Fri Mar 29, 2013 9:57 am
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- Load testing filament current?
by Blair » Sat Mar 23, 2013 7:57 am
- 1 Replies
- 997 Views
- Last post by DeathRex
Sun Mar 24, 2013 9:07 am
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- 5u4 in the RH-84 circuit
by nyazzip » Wed Mar 13, 2013 7:33 pm
- 16 Replies
- 4020 Views
- Last post by nyazzip
Thu Mar 21, 2013 11:32 pm
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- Wiring a transformer for practical use?
by Blair » Sun Mar 10, 2013 8:59 am
- 1 Replies
- 861 Views
- Last post by DeathRex
Sun Mar 10, 2013 2:33 pm
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- did i get lucky??
by nyazzip » Wed Mar 06, 2013 12:24 pm
- 2 Replies
- 1134 Views
- Last post by nyazzip
Wed Mar 06, 2013 7:25 pm
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- socket recommendations
by nyazzip » Fri Mar 01, 2013 8:31 pm
- 10 Replies
- 2460 Views
- Last post by tomlang
Wed Mar 06, 2013 5:49 pm
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- GU50 PP has a triangle at higher frequencies.
by DeathRex » Sat Mar 02, 2013 1:27 pm
- 5 Replies
- 3404 Views
- Last post by EWBrown
Mon Mar 04, 2013 9:51 am
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- Input Impedence and Transformers
by kt88pppamp » Sun Mar 03, 2013 4:18 pm
- 3 Replies
- 1201 Views
- Last post by battradio
Sun Mar 03, 2013 6:23 pm
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- selecting SE OPT
by nyazzip » Fri Jan 18, 2013 12:57 am
- 7 Replies
- 3382 Views
- Last post by nyazzip
Thu Feb 28, 2013 5:43 pm
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- Hybrid anyone?
by soundbrigade » Sat Nov 03, 2012 6:39 am
- 9 Replies
- 7523 Views
- Last post by glen
Sat Feb 23, 2013 11:34 am
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- Output cap to control bass response?
by Blair » Fri Feb 22, 2013 5:30 pm
- 1 Replies
- 914 Views
- Last post by DeathRex
Fri Feb 22, 2013 6:32 pm
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- Fisher 500B Iron?
by Blair » Sat Jan 19, 2013 7:46 pm
- 20 Replies
- 5066 Views
- Last post by Blair
Tue Feb 12, 2013 12:28 pm
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- electric baseboard heater+volume...
by nyazzip » Sun Feb 03, 2013 5:28 pm
- 3 Replies
- 1705 Views
- Last post by nyazzip
Sun Feb 10, 2013 2:48 am
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- power-on-off thump
by nyazzip » Tue Jan 29, 2013 8:26 pm
- 6 Replies
- 2323 Views
- Last post by burnedfingers
Thu Feb 07, 2013 6:01 am
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- Local Transformer Company
by dustinsterk » Tue Feb 05, 2013 9:30 am
- 2 Replies
- 1231 Views
- Last post by dustinsterk
Tue Feb 05, 2013 10:12 pm
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- Socket material
by msmpe » Thu Jan 03, 2013 11:48 pm
- 17 Replies
- 5444 Views
- Last post by msmpe
Thu Jan 31, 2013 10:57 pm
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- Odd imbalance reduces hum
by ioginy » Sun Jan 27, 2013 4:09 pm
- 16 Replies
- 9064 Views
- Last post by Geek
Tue Jan 29, 2013 11:30 pm
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- Big SS power transformer?
by Blair » Sun Jan 13, 2013 10:37 am
- 7 Replies
- 2615 Views
- Last post by Blair
Tue Jan 22, 2013 9:53 pm
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- Unusual voltage power supply Measurements
by Proschuno » Sun Jan 06, 2013 11:09 pm
- 2 Replies
- 1176 Views
- Last post by Proschuno
Sat Jan 19, 2013 10:59 pm
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- Need help identifying a tube
by Proschuno » Sun Jan 06, 2013 11:19 pm
- 2 Replies
- 1236 Views
- Last post by Proschuno
Fri Jan 18, 2013 10:31 pm
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- Tube suggestions
by Blair » Sat Dec 15, 2012 11:49 pm
- 16 Replies
- 4343 Views
- Last post by Impmon
Fri Jan 18, 2013 12:36 pm
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- Source for ceramic top caps?
by Blair » Fri Dec 21, 2012 7:39 am
- 9 Replies
- 2638 Views
- Last post by Impmon
Fri Jan 18, 2013 11:55 am
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- Increasing Capacitance
by riverrat373 » Sat Jan 12, 2013 4:28 pm
- 2 Replies
- 1396 Views
- Last post by Impmon
Fri Jan 18, 2013 11:44 am
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- Choke input filter?
by Blair » Thu Jan 17, 2013 2:57 pm
- 3 Replies
- 1379 Views
- Last post by battradio
Thu Jan 17, 2013 4:56 pm
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- OTL Amp/Headphone Suggestions
by dustinsterk » Thu Jan 10, 2013 9:04 am
- 7 Replies
- 4290 Views
- Last post by dustinsterk
Mon Jan 14, 2013 1:12 pm
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- Car Stereo
by 6B4G » Mon Jan 07, 2013 10:24 am
- 5 Replies
- 1630 Views
- Last post by 6B4G
Sun Jan 13, 2013 3:12 pm
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- SET OPT Power Rating
by glen » Thu Jan 10, 2013 8:35 am
- 1 Replies
- 972 Views
- Last post by Geek
Thu Jan 10, 2013 6:59 pm
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- New to tubes, old to hi-fi
by Blair » Sat Dec 29, 2012 6:25 pm
- 3 Replies
- 1838 Views
- Last post by msmpe
Thu Jan 03, 2013 11:32 pm
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- ST-70 rebuild concept?
by Blair » Fri Nov 30, 2012 8:16 am
- 89 Replies
- 15900 Views
- Last post by Blair
Fri Dec 28, 2012 2:56 pm
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- cap shock
by nyazzip » Fri Dec 07, 2012 3:06 am
- 3 Replies
- 1434 Views
- Last post by dcriner
Fri Dec 28, 2012 2:54 pm
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- Please help identify this tube
by egmac5 » Fri Dec 07, 2012 7:17 pm
- 6 Replies
- 2226 Views
- Last post by Ty_Bower
Wed Dec 26, 2012 1:49 pm
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- I have a conn organ transformer
by DeathRex » Sat Dec 22, 2012 4:58 pm
- 4 Replies
- 2224 Views
- Last post by DeathRex
Sun Dec 23, 2012 9:16 am
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- 12au7 Bias ?
by bigaudioscotto » Thu Dec 13, 2012 7:56 am
- 9 Replies
- 4631 Views
- Last post by azazello
Sun Dec 23, 2012 7:20 am
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