12fq7 tube data sheet - SERP Analysis

http://tdsl.duncanamps.com/show.php?des=12FQ7

http://rtellason.com/tubedata/12FQ7.PDF

https://www.radiomuseum.org/tubes/tube_12fq7.html

https://frank.pocnet.net/sheets11.html

https://dbtubes.com/en/various-manufacturer/1352-12fq7.html

https://www.diyaudio.com/community/threads/12cg7-12fq7-direct-swap-for-12au7.396178/

https://frank.pocnet.net/sheets/049/suppinfo/

https://www.radwell.com/Buy/GENERAL%20ELECTRIC/GENERAL%20ELECTRIC/12FQ7?srsltid=AfmBOoqZvdqb3rtOP9SaVbzhDoY830qlwBPnBGa6foqeJfHOX_H3Fn61

http://www.r-type.org/exhib/aci0009.htm

https://www.thetubestore.com/12fq7?srsltid=AfmBOorJc0lETBQkEUrjgHqhjcc6503g1zAlnHFXR-INXCL3cwdjpg-N

http://tdsl.duncanamps.com/show.php?des=8FQ7

https://tubedata.edebris.com/other/Sylvania/Sylvania_Technical-Manual_1970.pdf

https://chrisgrossman.com/manuals/military/Consolidated%20Test%20Data%20For%20Hickok%20Model%20533A-600A-605A%20Tube%20Testers%20V2.5.pdf

http://www.r-type.org/exhib/abi0058.htm

https://www.surplussales.com/items/73-capacitors/2602-corning-vitramon-glass-capacitors/150730-12fq7-various-brands-vacuum-tube/

https://tubedata.jp/index.php?M=search&word=12FQ7

https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/RCA-Books/RCA-Electron-Tube-Handbook-HB-3-General-Section.pdf

https://pe2bz.philpem.me.uk/Parts-Active/Tubes/TubeSite-01/tubedata.htm

https://www.jj-electronic.com/en/ecc83s-12ax7-7025

https://www.elliottelectronicsupply.com/12fq7-tube.html

https://reverb.com/item/2943993-nos-nib-matched-pair-westinghouse-japan-12fq7-12cg7-gray-plate-vacuum-tubes?page=1&filter=all

https://rtellason.com/tubes.html

https://www.tubesandmore.com/sites/default/files/associated_files/12sf7.pdf

https://www.audioasylum.com/cgi/vt.mpl?f=tubes&m=254747

https://www.rsp-italy.it/Electronics/Kits/_contents/Heathkit/Kits/Heathkit%20Tube%20data.pdf

https://quicksilveraudio.com/wp-content/uploads/2017/07/V4Manual.pdf

https://patents.google.com/patent/US20170329359A1/en

https://forum.audiogon.com/discussions/rays-tubes

https://www.effectrode.com/knowledge-base/the-cool-sound-of-tubes/

http://www.tubezone.net/pdf/6sn7.pdf

https://www.alldatasheet.com/view.jsp?Searchword=12FQ7

https://www.vintage-radio.info/download.php?id=515

http://www.audiotubes.com/bjtubes.htm

https://el34world.com/Forum/index.php?topic=11590.50

https://www.pestingers.net/pdfs/heathkit-test/t1a-supplemental-78.pdf

https://reverb.com/en-pt/item/1189786-nos-nib-raytheon-japan-12fq7-12rll5-12cg7-gray-plate-top-o-get-vacuum-tube

http://users.rcn.com/brentjes/bjtubes.htm

https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Sams-Books/SAMS-Tube-Substitution-Handbook-Vol.-13.pdf

http://oldradios.50webs.com/precision/600/600_series.pdf

https://audiokarma.org/forums/index.php?threads/max-output-power-from-300b-pair-in-push-pull.920253/

https://forums.stevehoffman.tv/threads/can-i-replace-a-12fq7-for-a-12bh7-or-12au7.45527/

https://www.audiocircle.com/index.php?topic=128030.0

https://www.radiomuseum.org/tubes/tube_6fq7.html

https://vintagetubeservices.com/wp-content/uploads/2019/03/More_Small_Signal_Tubes_2019.pdf

http://www.tubebbs.com/tubedata/type.html

http://pacifictv.ca/schematics/hickok605atestdata.pdf

https://6moons.com/audioreviews/passlabs3/1.html

https://bitsavers.trailing-edge.com/components/rca/1975_RC-30_RCA_Receiving_Tube_Manual.pdf

https://tone-lizard.com/tube-testers/

https://bigriverhardware.com/collections/vacuum-tubes-guitar-amp-tube-antique-radio-tubes-old-tubes?page=5&srsltid=AfmBOoo6gXcFmwt1-iQXqgZJYYon5Hetgxly940O2n0i2hfTdqQ5w7lM

https://spectrum.ieee.org/the-cool-sound-of-tubes

https://www.hifidiprinzio.it/en/amplification/preamplifiers/quick-silver-quicksilver-preamp.html

https://gearspace.com/board/high-end/112131-retrospec-quot-juice-box-quot-tube-replacement.html

https://archives.doctsf.com/documents/afficher_document.php?num_doc=124305&num_fic=1

https://quicksilveraudio.com/wp-content/uploads/2017/07/FFPreampManual.pdf

http://www.tubebooks.org/tubedata/HB-3/masterindex.html

https://forum.audiogon.com/discussions/rays-tubes?sort_order=desc

https://www.head-fi.org/threads/little-dot-tube-amps-vacuum-tube-rolling-guide.563884/page-896

http://www.rf-china.com/n21/GL.asp

http://www.vacuumtubesinc.com/18new.pdf

https://antiqueairwaves.com/nlee/files/tv-7_097.xls

https://patents.google.com/patent/US20190013782A1/en

http://www.audiotubes.com/

https://www.audiocircle.com/index.php?topic=156755.0

https://www.scribd.com/document/390146040/Tube-Data-for-Heathkit-Tuber-Tester

https://auralhifi.com/products/preowned-quicksilver-m-135-135wpc-tube-amplifier-monoblock-pair?srsltid=AfmBOoq10tOHDUhRAGogQHBeLFA3baXMod1aq1TDYm7Rz4YON1P9CtVY

https://www.hifido.co.jp/sold/22-35795-39440-00.html?LNG=E

http://ja1vtu.scm-net.or.jp/manuals/Eico/Eico%20Model%20635%20Tube%20Tester%20(and%20tube%20data)%20WW.pdf

https://www.worldtubecompany.com/mm5/merchant.mvc?Screen=PROD&Store_Code=WTC&Product_Code=6L6GCPHU&Category_Code=1L-U

https://forum.polkaudio.com/discussion/159386/quicksilver-m-80-monobloc-tube-amps-nickel-plated-1550-00

https://tmraudio.com/components/power-amplifiers/quicksilver-m-135-mono-tube-amplifiers-pair/?srsltid=AfmBOorvdKMls1fN8H8zKrPK4MO4bBV0e1CNkCMOIQjEMdZC0DQmYie2

https://6moons.com/audioreviews/jolida3/phono.html

https://www.rfparts.com/old_site/pdf_docs/023%20Tubes%20and%20Sockets.pdf?srsltid=AfmBOoqk2RkaL8xg7J_6nAjq01f6g300R3CvLKZ_sWzRYuDSsIcMhB11

http://www.soundscapeav.com/quicksil/v4.html

https://groupdiy.com/threads/12bh7-12bh7a-subs.6860/page-2

https://audiokarma.org/forums/index.php?threads/how-close-are-e90cc-to-12au7.697887/

http://www.tubebooks.org/tubedata/HB-3/Receiving_Tubes_Part_2/typeindex.html

https://www.tubecad.com/2006/05/blog0063.htm

https://skyfiaudio.com/products/quicksilver-tube-preamp-with-built-in-phono-stager-rare-and-mint?srsltid=AfmBOoo5SrrLCpgpR7R-xTD15RSkw2Rovi2k4oEPILY4HNMx4GMQojzj

https://www.usaudiomart.com/details/650130704-quicksilver-v4-mono-amplifier-pair/

https://radiomann.sakura.ne.jp/HomePageVT/Tube_Index_30.html

https://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Roe-Pruefer/Hickock-6000/Supplementary-Test-Data.pdf

https://mkratz.pt/

http://oldradios.50webs.com/precision/900/P900_series.pdf

http://www.soundscapeav.com/quicksil/m135.html

https://www.turneraudio.com.au/2323-triode-integrated-6cm5.html

https://www.audioasylum.com/messages/amp/82602/b-review-quicksilver-audio-full-function-preamp-preamplifier-tube-b

http://jontalle.web.engr.illinois.edu/uploads/403/AudioVacuumTubes.16.pdf

https://puck.nether.net/pipermail/boatanchors/1997-November/000929.html

https://www.worldtubecompany.com/mm5/merchant.mvc?Screen=PROD&Store_Code=WTC&Product_Code=6N45CN&Category_Code=1N-N

https://www.vacuumtubesinc.com/2018VTIcat.pdf

https://auralhifi.com/products/quicksilver-v4-monoblock-tube-amplifiers?srsltid=AfmBOoqZlF5h3sn4To9oPdH6Cg873eQyJHG6UYS8Ohmk3vKjsfNMa2wx

https://www.usaudiomart.com/details/649630097-quicksilver-full-function-preamp-with-phono/

http://6bm8-lab.fr/docs/tubes/tarifs/Billington-March2008Cat.pdf

https://dbtubes.com/en/various-manufacturer/2236-7058-12ax7.html

http://dcaudiodiy.com/phpBB3/viewtopic.php?f=4&t=1404&start=30

https://platycerus.hatenablog.com/entry/20041027/p1

https://tmraudio.com/old-products/quicksilver-audio-v-4-mono-tube-amplifiers/?srsltid=AfmBOoqPqvpBIa-7dP6aO1yKn_IQSsmJKSGpzLeeccafc4GA6kXzXQUs

https://www.scribd.com/document/507051483/Tube-Price-List-by-Bob-Dobush