What is needed to build a tube amp and what non?

stevecham.....the best OT is missing...but one bad side for OTL, OTL is close to PP..Charles, Welcome to the real sound! Sorry, but Im more extremely than You. Regards!

I know, but MG is not the top of the ice cream.....The practice some times is other work....

MJ is 100% genius, but Im not sometimes 100% agree with him, IMO....

Sory for my bad English....Im talking about what must consist tube amp and what not. How to build it and my assumptions and decisions. ....and your opinions, please?

-IMO, NFB  press the scene of the sound sending the part of signal back into the previouse stage. Unique amp must be built lineary without NFB, /in some causes linearity doesnt mean best sound/. -
- IMO, never use tone control that change the sound. If You need more bass, use big bass speaker, if You need more high freeq. - use sensitivity tweeters, if You need meedle fr. - use sensitivity fullrange not less 8 inch. - -  IMO, Hi End is back proportional to the number of   composite parts - use simple decisions with not cheep parts- cheep parts - cheep sound!. Every passive part change the sound.  - IMO, in SE iron for OT must be 10-20 time more than output power, /for 5 W never use 5 W OT, but 50-100W/.
 - IMO, in power supply use kenotrones, that provide soft start and soft amazing sound. Every time use iron chock and hmmm will be far from Your ears.
-   IMO, do not use iron enclosure that collect noises....Please, Your opinion?

pbnaudio.....I have experience  with tubes more 20 years and I have more than 50 DIY projects - 300B, 2A3, 6L6, EL11, EL34, EL84, 5005,  GK71, GU13, 6P3SE....kits is not in my interest....
minorl....I mean tube amp with input for CD, DVD......and outputs for speakers.  I mean that tone control change dramaticaly sound inside in amp and it is not suitable... and sound must be realy, naturaly.  After this must increase quality of sounding of speakers and rooms, that is, IMO, Hi-End....What about if sound is changed in amp and than make gimnastic with rooms....Must increase quality of sound in series, begin from source, amp, speakers, rooms...Regulary room is not suitable for HiEnd, room for sounding make only for sounding in the end, using accustic materials.

pbnaudio....this is my tube gallery: https://photos.google.com/share/AF1QipOYq0r3yyYjkhz179q5evuYNSCotX8Bl0oG5exYcM-KRBbhIGjGYMWFBLMSx-YD...

Thank You, Peter! Y''re welcome!

IMO, in PP when signal cross  0 between 2 output tubes, cause sharp and metal sound, that people sense like detail. And I think PP is not for HiEnd in more situation. PP is for driving with big power several speakers with different sensitivity....More suitable for HiEnd is SE with big OTs with it warm and fresh sound. Signal is amplified in one work zone. / I use SE EL11 Telefunken - 1 W in triod and I think this tube is the best for all the times/.

IMO, Im not a specialist, but I think the sound from closed box with or without whole is deformed by the compretion of sound waves and not be real. I think real sound, like from opera, simphon. scene is from open box, like horn or better oppen bufle with fullrange for 50-14000 Hz /can de added twiter for Hi freeq./ and bass speaker /together/ for 30-50 Hz. /I listen in my home fullrange with bass/.....I think closed towers  with more speakers are for regular public. Aftrer all this, I think, HiEnd is something High....acc. my criteria...

stevecham.....the best OT is missing...but one bad side for OTL, OTL is close to PP .... .Charles, Welcome to the real sound! Sorry, but Im more extremely than You. Regards!

--atmaspfere....With OT quality of sound of amp depends to OT, construction, kind of wire, kind of iron, wiring....But propertys, peculiariy of sound of every tube penetrates cross OT and SE /I feel/ sounds more warm and I can listen more hours. But OTL is better in some situations, sounds without breaks between tubes and speakers /without cap in output - OCL/, the sound is very deep, clear, bass in my OTL starts from 5 Hz!! But must have fast fuse if both sholders are disbalansed /if some sholders is out of mode....speakers are connected to common resistor with output currents in oposite directions for resulted 0 A/. But OTL has phase invertor like PP and signal goes between sholders and sound is close to PP.But I like my SE 2A3 RCA and my OTL 6AS7GE....
Charles....I accept Your words and Im allmost agree....Different tubes in SE sound different cool, I prefer my 1 W  SE EL11 Telefunken in triod, that sounds better 300B....Every time I compair 2A3 RCA and EL11 Telefunken.

--Elizabth.....Thanks!
--atmasphere...OK! Can I somehow look in Your schem?

--grannyring.....Im agree. About good reg. - I mean tube rec and CLCLC filter, without any kind of SS reg. that decrease dynamic of sound and complicates schem with grape of passive elements. I tried, iron chock 5-10 Hn 2 pcs is the best, IMO.

Thanks! But I dont open. The link is blocked /Im a member/.

....I can not open the link

I hoted, link is in post 2 in diyaudio.Thanks for post above!

I listen posts about amps and I wondered, people very likes brand amps and ready to give thousnad money for amps, towers with ordinary components and speakers /Sorry for my bad English!/.....that are with common using, for ex. tube amps with cheep tubes, that are used in guitar amps, speakers that are used in thousand towers for common people. Audio listeners do not think there are audiomasters, that can make really HIEnd devices with quality better brands.....In CA I listened brand SE 300B for about 9000 $ and I noted nothing interesting, ordinary amps. The same with PP McIntosh, IMO, I wasnt wondered, dry sound.....And hundreds posts where people praises with dozens brands amps, towers. Expensive towers with 3 and more speakers are not very good choice, although that are built with expensive components. Deviding filters always press the sound and decrease it quality. Always better choice is direct coupled amp and speaker, really HiEnd.And I noted, people likes big power PP 50-100W  that is inexplicable, 3-5 W from SE with speakers with good semsitivity are enough for quality listening in big room. All above I dont understand....Sorry /encore une fois/, maybe Im in wrong place...