just interest for old tehnics
Predrag Grastic <graleprg@yahoo.com>
kikinda, kikinda Serbia&montenegro - Thursday, March 10, 2005 at 23:22:35 (CET)
Mattijs, bedankt voor je goede adviezen. En de buizen zijn netjes bezorgd, klasse.
Nicky in 't Veld <nicky@nickyintveld.nl>
- Saturday, February 05, 2005 at 18:46:29 (CET)
Vandaag mijn bestelde buizen binnen gekregen. Perfect en veilig verpakt, complimenten!! Ik heb ze erin gezet en ze spelen de sterren van de hemel.
Mattijs bedankt voor de goede snelle service!!!
Sidney Laracker
Netherlands - Tuesday, February 01, 2005 at 18:46:09 (CET)
Ziet er goed uit! Hier heb je wat aan, pure audio, geen onderdeel te veel. Een must voor elke serieuze audioliefhebber. Joep. p.s. Bedankt voor de lead Jaap!
Joep van Wulfen <jvwulfen@hotmail.com>
- Tuesday, November 30, 2004 at 16:00:46 (CET)
Cool stuff...hope to learn something about das toobs from your site...
John Babyak <ctmoneymgr@aol.com>
USA - Wednesday, October 06, 2004 at 23:47:35 (CEST)
Luca
Italy - Friday, September 17, 2004 at 02:52:24 (CEST)
thank,for tube-knowledge.....
dean futterman <parco@yoohhoo.com>
thailand - Tuesday, September 07, 2004 at 21:42:05 (CEST)
very useful. keep it up
Denis cook
perth, WA australia - Saturday, August 28, 2004 at 07:08:44 (CEST)
I like your site. You have interesting upgrades made to your equipment. By the way, do you use computer simulation for your designs?
(Machmat: Yes, all circuits are simulated in Microcap simulation software, power supplies in Duncan amps PSUD simulation software. After designing they are measured thoroughly, and then optimized in sound by trying out different components and small variations in values. After optimizations they must run continuously for a month minimum. Most of the time they also get build by someone else, to see if everything is right. Only when they pass all these tests they get available as a DIY kit.).
Best regards Thomas
Goldfarb Thomas <tigro11@netvision.net.il>
Israel - Tuesday, October 26, 2004 at 18:29:03 (CEST)
Why, oh why do designers like to put vacuum tubes in tube grinder circuits? I like to max out the MTBF (mean time between failures) by letting the tubes in all stages just "loaf" at reduced power. A conservatively-rated hi fi amplifier can be made to sound like a rotary spark gap if a stage of unity gain waveform modification is added, like a (12AX7), biased to Class B or C, in a differentiating circuit with some degree of grid leak bias, along with cathode bias. Play around with values a little, running the (12AX7) at 100v and low current on the plates. The amp. will sound like it's on fire, but the tubes will last for years. Especially if you're running some decent sized bottles in the PA stage, like the 6CA7, 6550 or 6146's. If you think the tubes themselves have a characteristic "sound," forget it. You're really hearing the sound of distortion.
(Machmat: Of course, harmonics determine the sound of anything, for example the difference between instruments. Distortion always comes in harmonics, and thus they determine the typical sound of a specific tube in a specific application. This is a combination of the distortion of the tube in the circuit (most important), but also of the tube itself).
Tubes from a different lot or a different manufacturer will have differing transconductances, operating points, and idling currents in a given circuit- changing the distortion mode and the particular sound. Duh!
(Machmat: Then why do tubes of the same brand (even same lot) with characteristics changing typical over almost 100%, still have the same typical sound? I think you should reconsider your opinion. Personally I think typical sound of a brand can be found in geometrics, used materials, tolerances and typical vibrations)
Cheers and 73 -Ray
Ray Owen <rgowen@totalspeed.net>
USA - Monday, October 11, 2004 at 06:40:27 (CEST)
Geweldige site. Doet mij deugd als old-timer te zien dat er kennerlijk nog veel belangstelling is voor ''oudheden''
J.J.de Looff PAØPFU <jdelooff@xs4all.nl>
Nederland - Tuesday, August 17, 2004 at 01:16:40 (CEST)
Fascinating ! I got your link tru a good friend of mine. It happened he helped me searching Brimar tubes CV1985. I am also interested in power resistors of 10K/25Watt , 75K/25Watt, 1K/50Watt Will advise you soonest. Paul
Paul Yahya <pyahya@cbn.net.id>
Indonesia - Saturday, July 31, 2004 at 04:44:57 (CEST)
We require 0.1mm thick Bourden Tube
Ajit Tewatia <ajeettewatia@yahoo.co.in>
INDIAN - Tuesday, July 06, 2004 at 08:17:18 (CEST)
het begon door een kapotte gelijkrichter, kwam bij mattijs thuis en liet mijn zijn setje horen op zolder, wat ik toen hoorde was voor mij gelijk een referentie (ja zo snel kon ik daar over beslissen)
mattijs is een jongen met now how
zowel technisch als theoretisch met een dosis praktijk ervaring
neem nou het advies dat ie me gaf om een zilver mica als koppel C in de voortrap te doen, mensen daar kan voor mij geen Auricap tegenop
mattijs hierbij nog eens dank voor de begleiding naar een mooie versterker
Marco
Nederland - Sunday, July 04, 2004 at 03:29:13 (CEST)
Nice looking website.
The schematics of the V72 and V76 are TAb/telefunken schematics and quite well known in the pro-audio world. So you can skip the UNKNOWN label
Cheers,
Marnix
Marnix Bosman
- Tuesday, June 15, 2004 at 10:23:50 (CEST)
ben aan het rondkijken voor een buizen
voorversterker met de 76 of de 26 buis
met een goede riaa en mc ingang
groetjes v/d berg
Kees van den Berg <c.vandeberg3@chello.nl>
Nederland - Sunday, April 11, 2004 at 22:39:04 (CEST)
I wish to buy some tubes. I sent email.
Jaehoa Choi <CJH2@hitel.net>
South Korea - Saturday, January 10, 2004 at 02:13:31 (CET)
Very nice! Would like to know if many (or any)
bother to convert turntable cartridge o/p to balanced
with an appropriate balanced i/p phono amp.??
Also, am interested re your comments about the MM/MC cartridge choice?
P.S. U may want to change the word "Heather" for Heater or, Filaments, in your schematic...no need to post this comment onyour site, of course!
Ray Hamono <qtron@wired.net.au>
Australia - Sunday, January 04, 2004 at 15:14:52 (CET)
engineer
hien <hientrinhthai@yahoo.com>
vietnam - Friday, December 19, 2003 at 09:30:02 (CET)
Sorry long delay tell you.I am bad condition yet.I bought many old tubes and parts from 1930's this year.Also i am audio transformers supplyer in JAPAN.
Kouji Matsuo <taimubel@ctb.ne.jp>
JAPAN - Thursday, December 18, 2003 at 08:08:52 (CET)
audiophile. hello everybody! please sent for me 1 schematic of amply class a. i have 2x 6sn7(usa) and 2x 6c33c(rusia). thanks
hien <hientrinhthai@yahoo.com>
vietnam - Wednesday, December 10, 2003 at 07:34:15 (CET)
Great Page! My congratulations!
Jack
Jack Lee <yacekt11@wp.pl>
Gdynia, Poland - Friday, October 31, 2003 at 23:05:48 (CET)
Great web page !
I am interested in balanced tube preamp and driver circuits.
Randy Blake <rblake@dot.state.az.us>
USA - Thursday, August 28, 2003 at 22:57:17 (CEST)
Hi there, Interesting site.Happy to go through it.Well done.I am new to this field.Need advice and guidance to construct Mullard 10W mono block p/amp.
THAMAN SINGH DAIN <tsdain@yahoo.com>
Malaysia - Thursday, June 19, 2003 at 01:20:32 (CEST)
i need ebf-11 tube
michael de noia <mdenoia@avielectronics.com>
united states - Thursday, June 12, 2003 at 20:59:46 (CEST)
Hi Machmat,
great site of yours, i like it. Your system looks funny, but the main thing is the sound, isn't it?
Keep going strong.
Michael
Michael Bornemann <bormic@web.de>
Germany - Wednesday, May 28, 2003 at 15:42:15 (CEST)
i discovered via my 845 se,that regulated psu isent the only answer..
chokeinput on the powertubes can do as well..sure i was in the need to find a substitude for my regulated psu with +1200vdc..anyway this is just a hint to you,just a choke and enough caps will do
thomsen <thomsen@tk-datateam.dk>
denmark - Wednesday, May 21, 2003 at 18:23:20 (CEST)
tja ik had je niet herkend maar vaaak op je nette zolder gekeken nog veeel plezier met de tosters
groetjes karel
karel T <weet niet dom he>
- Wednesday, May 14, 2003 at 23:29:15 (CEST)
Ah, good ol' trustworthy beer. My love for you will never die. (Homer Simpson)
Simpsons Quotes <tom@hotmail.com>
USA - Friday, February 21, 2003 at 20:40:14 (CET)
Great site Matt, thanks for the info!
John Deere <John@Qblizard.com>
USA - Friday, January 24, 2003 at 22:42:48 (CET)
Keep up the good work. I am glad to see vacuum tubes still live in harmony with the true connoisuers of fine audio
Ross Mattson <rmattson@bluecrow.com>
Canada - Sunday, December 15, 2002 at 20:47:56 (CET)
very nice little site mat!!
Larry Harasim <used-hifi@attbi.com>
USA - Friday, December 06, 2002 at 07:18:42 (CET)
VERY GOOD SITE
GEORGE
GREECE - Wednesday, October 23, 2002 at 01:32:27 (CEST)
Great pages, thanks for the effort!
Jonh Carlson
USA - Friday, October 04, 2002 at 13:39:59 (CEST)
An excellent Web site indeed.
I am looking for a diagram for the LEAK
TL25 Plus.
Tanks.
Antonio Lopes <melodial@netcabo.pt>
PORTUGAL - Sunday, April 14, 2002 at 03:02:09 (CEST)
Great DIY site !!! Thank You Mattijs !!!
Paolo Gibertoni <paolo.gibertoni@tin.it>
Italy - Wednesday, April 10, 2002 at 12:53:15 (CEST)
THANKS FOR KEEPING IT ALIVE
KEVIN PURIFOY <kptowerservice@aol>
- Monday, April 01, 2002 at 03:35:42 (CEST)
Great collection of schematics, will come back to it in future. Tot siens!
Adriaan Hammer <adrjfham@aol.com>
Lafayette Louisiana USA - Saturday, March 23, 2002 at 16:09:12 (CET)
I agree with most visitors about the quality of the site:
Good Job.
Today I had the opportunity to get 2 altec 421s. One of them has a 'sticky' coil. It makes scrachty noises when being pushed. The Owner said it happened when they fall down.
They were used as a PA system before and they have an Alu dustcap and a white cage.
Anybody knows if the can be 'recentered'?
Any advice warmly welcome.
Thanks
Thomas
Thomas Schick <mail@thomas-schick.com>
- Thursday, February 21, 2002 at 20:44:48 (CET)
I am looking for a pair of Tung Sol 6sn7wgt
tubes for my preamp (Supratek). Please
advise if you have some stock or if not, where would
you advise looking. Also, are the Tung Sols the same as
a Sylvania 6sn7wgt (physically and electrically)?
Thanks!!!!
Jeff
JEFF GALLOWAY <gallojc@louisville.stortek.com>
- Friday, February 01, 2002 at 01:00:18 (CET)
Hi brother,
Thanks a lot for the Telefunken Tube you gave me for my birthday.
My life will never be the same!
I put it in my effect box and ever since people give me compliments about my guitar playing and they ask me how to get that incredible sound!
Not to mention the groupies!
Greetz,
Your big old brother.
Jan Atze de Vries
Friesland - Wednesday, January 23, 2002 at 09:42:42 (CET)
Ik ben steeds weer aangenaam verast dat er zulk een goede buizen-site's zijn en deze is er zeker een van.
Nog veel sukses met site en vooral je passie voor muziekweergave!!
Guido De Laet <guido.de.laet3pandora.be>
Belgium - Wednesday, January 16, 2002 at 14:31:40 (CET)
i am stunned i dont know what to say
highly impressive
fazel shaik <faze@emirates.net.ae>
united arab emirates - Tuesday, January 01, 2002 at 11:30:10 (CET)
this is an excellent site for eary surfing and the wealth of info it contains. i really appreciate the time you have taken to put this together and keep it updated.
having learnt electronics circuits inthe early 60's when tubes were predominant i can appreciate the nostalgia that we hold for these devices. but sadly the transistor and ic's have taken away this knowledge bit by bit.
now it is difficult to find tube enthusiasts in my country who can share experiences together.
sites like yours help us to recollect and associate with the past.
keep up the great work.
thank you
best regards
alaggappan shammugan <alshan@ldtsb.com.my>
malaysia - Saturday, December 29, 2001 at 03:23:07 (CET)
Well Done! It is a great haven for audiophile. Keep the info coming..
Leong Kin <erickin@lycosasia.com>
Singapore - Sunday, December 23, 2001 at 17:12:04 (CET)
When I left school in the mid 60's I worked in a hifi retail shop and sold amps like the leak you could tell then that the quality was beyond reproach the best sound i have ever heard was from a pair of TL50,s great nice to see the dsigns again in 68 i had a customer who complained that the recifier in his TL 10 had failed it had been in use for 21 years ! Golden memories!!
Trevor Latala <Latala @ic24.net >
United kingdom - Monday, December 17, 2001 at 23:40:26 (CET)
Your site is fantastic, I really enjoyed reading it.
Your "unknown" schematic featuring 6BQ7, 12B4A, PP 812A should be credited to David O'Rourke, who published the design in an excellent article in the Feb 95 issue of Glass Audio. This great article summarizes David's evaluation of output and driver tube choices. Highly recommended.
Norm Tripp <ntripp@mediaone.net>
Boston Massachusetts, USA - Monday, December 10, 2001 at 04:02:07 (CET)
How do you get the time?
http://home.no.net/janoles/forsterker.html
- Tuesday, October 16, 2001 at 15:19:24 (CEST)
Great site, excellent!!!
LE KIM THACH <thachlk@fpt.vn>
HANOI_ VIETNAM - Monday, September 03, 2001 at 18:03:31 (CEST)
You've got a lots of NICE stuff! Thanks
for sharing it with the world. :)
Dan McCormick <danmick21@excite.comUSA>
USA - Friday, July 27, 2001 at 08:39:35 (CEST)
Congratulations and thanks for your site which is amazingly complete , fast and clear.Very interesting to all possible extents.Michel
PERELMUTER MICHEL <mike477@caramail.com>
FRANCE - Monday, July 02, 2001 at 14:24:15 (CEST)
Prachtige website,(je stuurde me drie jaar geleden schema's van amp's met 300B's)Is geleden van de High-end show in de Blokhoeve in Nieuwegeins Business Center).Ik heb eindelijk een schema van mijn zin kunnen bemachtigen:de Audionote Ankoru (845 parallel SE,geeft 70 w pure class A! ,driver:300B )ps:ken jij enkele firma's waar ik de trafo's kan bemachtigen?(Eventueel Audionote Uk?Doe zo verder,Greetings David Iedereen die geinteresseerd is in het schema,mail me!
David De Koninck <kronzilla@hotmail.com;dekoninckdavid@hotmail.com>
Belgium - Monday, July 02, 2001 at 00:15:36 (CEST)
skrammel-synd at nogen tror det rykker!
thomsen
- Tuesday, June 12, 2001 at 18:26:07 (CEST)
Succes !
Bert Rietveld <rietveld@zonnet.nl>
nl - Thursday, June 07, 2001 at 14:34:56 (CEST)
Nice: Site and circuits. ;-)Onkel frihu from Germany
Onkel frihu <info@frihu.de>
Germany - Saturday, May 12, 2001 at 07:31:23 (CEST)
Zeer goed veel informati over buizen versterkers mijn werk&hobby reeds 50 jaar
BAECKELANDT <edmond.baeckelandt@yucom.be>
BELGIE - Sunday, May 06, 2001 at 09:11:50 (CEST)
great side,like to download some schema,
guenther baumann <baumann@mweb.co.za>
south africa - Tuesday, May 01, 2001 at 18:59:13 (CEST)
You have a well put-together site. very informative and easy to navigate without any stressful wait times.
Lincoln Miles <lkmil1@aol.com>
USA - Monday, April 30, 2001 at 01:15:04 (CEST)
Veel inspiratie is te vinden in deze schemabibliotheek. Ook voor de ROTEB (vuilnisbaktvbuizenversterker) heb ik al wat geleerd. Wie bouwt er dingen met PL 504 of PL 519?
steven <ksvanravesteyn@yahoo.com>
- Saturday, April 14, 2001 at 21:10:03 (CEST)
Mooie site en veel buizen.
Devitox
- Saturday, April 07, 2001 at 21:03:06 (CEST)
DONT GIVE UP ON THIS SITE!IT IS A GRANDSITE!I HAVE TONS OF OLD SCHEMATICS PLUS GRAND EXPERIMENTATION KNOWLEGE FROM THIRTY YEARS OF EXPERIENCEOUTSIDE ALL BOOK RATINGS.SOON I WOULD BE HONORED TO SHARE IT WITHALL.SO HANG IN THERE!!!BRAD IN THE MAJESTIC FOOTHILLS OF THEINLAND EMPIRE IN CALIFORNIA.
BRAD SWEARINGEN <EYESEADUYU>
U.S.A. - Sunday, March 11, 2001 at 23:58:36 (CET)
A great resource for design ideas. BIG, time saver.
Scott Wolf / Vertex Amp's <wolfmos@us-it.net scott.wolf@gm.com>
USA - Wednesday, February 21, 2001 at 19:53:47 (CET)
An excellent Web site indeed. I am looking for a diagram for the McIntosh MC-3500. Thanks.. Joe
Joe Risher / Sounds Great! Enterprises <jksbrisher@juno.com>
USA - Monday, February 19, 2001 at 02:30:09 (CET)
Mooi site en veel info voor radio amateurs heb link aan gebracht op mijn site, groeten Ruud
pe1agf <pe1agf@chello.nl>
Nederland - Saturday, February 17, 2001 at 11:19:26 (CET)
glad the search engine found this page. it's amazing how much 'junk' on tubes there is out there! DL time is faster than most sites. thanks for being out there!!!
David <cocknine@hotmail.com>
- Sunday, January 28, 2001 at 13:59:05 (CET)
Hope, this page gives me hope.Hope on finding four 8417 tubes.Great page.
Lars Weeling <weeling98@zonnet.nl>
- Wednesday, January 24, 2001 at 23:31:39 (CET)
Building UltraLinear PP 6L6, 6SN7, 6SL7, your web page is a good design resource.
John Kahl <Jkahl@jkllamps.com>
USA - Monday, January 22, 2001 at 21:38:42 (CET)
CONGRATULATIONS !!!! Very nice workMr MachMat .I am a novice valve tube tinkerer and liked very much all the information I am absorbing from yourwebsite ! I have a Fisher X-100 integrated pre/power and Bose 901 speakers.Do you think if I build a single endedlike yours with Lowthers I will be morehappy ???? Thanks a lot !!
Walter Reis <kerkalianer@terra.com.br>
Brazil - Wednesday, January 17, 2001 at 04:11:03 (CET)
????
Thummasak Rakboon <T_Rakboon@hotmail.com>
Bangsaothong, Samutprakarn Thailand - Tuesday, January 16, 2001 at 12:31:41 (CET)
Great Page.I also use 4 Altec 421LF but in Onken Wenclosure and is an impressive sound
Francisco Jileta <fjjileta@megared.net.mx>
Mexico - Saturday, January 06, 2001 at 06:40:13 (CET)
I thank you for fine pictures.Merry Christmas and Happy New Yer.
Folke Parus <FOLKE.PARUS@pp.qnet.fi>
Finnland - Monday, December 18, 2000 at 20:20:42 (CET)
Does it work? Yes it does again!
Mattijs <Mattijs@machmat.com>
The Netherlands - Wednesday, November 29, 2000 at 21:26:57 (CET)
Very good looking site. Max arbeiteneinen.Very good links to other (even competitive) sites, a symptom of "Integrity Syndrome", straight-up & honest dealing operation & then some.
Karl W. Schweickardt, Jr. <KarlSnake@aol.com>
Snake's Pit in N. Bexar Co., TX, USA, Earth, M.W.G. - Sunday, October 22, 2000 at 14:56:21 (PDT)
Thanks for the great website you obviously have put a LOT of work into it. I am interested in trying to build the single ended amp shown on your pages, the one with the ECC 83 and the KT88 output valve / tube. however I intend using a TT22 which is similar apart from the filament at 12.6 volts. Walter Shawlee2 at Sphere Research has 3 of them in stock at a good price(hint hint). I will keep you posted as to how the amp works.Regards and keep up the good work, from Tony.
Tony Thomas <charthom@online.no>
Norway - Tuesday, October 17, 2000 at 13:56:25 (PDT)
Great Site!
Joe Cro N3IBX <n3ibx@arrl.net>
U.S.A. - Friday, September 15, 2000 at 19:56:46 (PDT)
Found what I was looking for.Great page :-)
Uffe Christensen <tws@image.dk>
Denmark - Saturday, September 02, 2000 at 06:35:11 (PDT)
Great work!very well done!,thank you!
tom <woytomas@poczta.onet.pl>
Poland - Thursday, August 31, 2000 at 12:08:26 (PDT)
Very good web site for audio Pre-amp circuitsI will build one the marantz m7 and give you my feedbackregards,thomas.
George Thomas
Singapore - Saturday, June 10, 2000 at 20:29:49 (PDT)
I looked at my brothers pages and once again was proud to be a member of THE De Vries family. Great job!
Jan Atze de Vries <info@shwing.nl>
The Netherlands - Thursday, May 18, 2000 at 05:02:30 (PDT)
very goodcompliments
alex pierotti <alexpierotti@tiscalinet.it>
italy - Sunday, April 16, 2000 at 09:53:34 (PDT)
Nice and informative.Personaly I would rather see files in PDF then JPEG.
Dr. B. Jagodic <dymo@icon.co.zw>
Zimbabwe - Monday, March 27, 2000 at 09:04:44 (PST)
Ik heb geprobeerd wat te bestellen maar dat lukte niet,maar het gaat om de e 188cc als je er 4 kan sturen naar Henri Jimmink zuurvensweg 6Bergen (n-h)1862 bk
Henri Jimmink <j.jottum@consunet.nl>
Nederland - Wednesday, March 01, 2000 at 13:42:57 (PST)
It's my turn to write something cool about the baloon goodies I received...see ya for the next tubes I'll take !
jerome <jipihorn@club-internet.fr>
France - Sunday, February 13, 2000 at 22:08:53 (PST)
Pages, where the dreams of Hi-End DIY stuff comes true...
Jarek Korbicz <jarek@nat.vu.nl, jarek@fuw.edu.pl>
Poland - Monday, January 31, 2000 at 06:14:54 (PST)
thank you for good page !!
Elvis Rakic <elvis.rakic@zd.tel.hr>
Croatia - Wednesday, January 26, 2000 at 06:07:28 (PST)
Great site with library of schematicshistoric and custom. Keep up good work(dont let it go down)
BJSmith <smithaus@execpc.com>
USA - Tuesday, January 18, 2000 at 10:35:43 (PST)
Nicely *revamped* site! Greetz from the far East ;-)
Remco <r.m.stoutjesdijk@student.utwente.nl>
NL - Monday, January 10, 2000 at 06:29:16 (PST)
Great site , even built a 2C34 amp after seeing your design .
Nic Wilsher <nic_wilsher@yahoo.com>
UK - Tuesday, January 04, 2000 at 11:35:16 (PST)
Excellent pages! Very well done. Thank you for your submission to DMOZ. Your page is listed as of today. Regards from the US,Joe
Joseph Lee Plaziak <joe@tubeguy.com>
USA - Tuesday, December 14, 1999 at 07:20:37 (PST)
De leukste pagina ooit van mijn vriendje. En dat het steeds maar weer net iets mooier mag worden.
Renske Stuijt <renskestuijt@hotmail.com>
NL - Monday, December 06, 1999 at 12:53:51 (PST)
Great pages ;)))
Mattijs de Vries <mattijs@machmat.com>
The Netherlands - Monday, December 06, 1999 at 12:08:00 (PST)