My Edcor Outputs for this project are finally on the way, 4 weeks to build and that was with the standard 8 week notice. I masked off the chassis and started some layouts. Thank you Mark for all the trench work on this build
@woodowoodo1405
6 жыл бұрын
loved the series. great sound at this end.
@ericjones2644
6 жыл бұрын
This series was more fun to watch than anything I watch on tv. Cant wait to see more videos. Would LOVE to see you build a nice tube phono preamp someday.
@qpiter
6 жыл бұрын
Oh yes! me too. It seems no one wants to touch phono preamp.
@Lee-NN7X
6 жыл бұрын
Thanks for sharing your time and talent Mark.
@matthewhall6288
6 жыл бұрын
Outstanding series. You really got me interested in building my own amp. Thanks!
@KerryWongBlog
6 жыл бұрын
Really enjoyed the series. Thanks!
@brucefriend3760
6 жыл бұрын
Sweet sounding amp. Love the outro with St. James Infirmary. One of my favorites as well. When it started I thought to myself, Oh yeah that's St. James. Can't wait for the KT88 build.
@ArthurSadowsky
6 жыл бұрын
Mark, totally LOVE the music that you are recording and promoting on your personal Record Label! It sounds great too ( I know, I'm a musician). Please keep up your talented work!
@tomaskey6844
5 жыл бұрын
I loved this series and will be looking for more of your videos. My goal is to build a tube guitar amplifier and effects. I'm struggling to grasp electronics but will keep at it. Just finished a LM386 kit amp and have purchased a breadboard to experiment with changing designs to see what works and hopefully learn a lot along the way. Your videos definitely were a blessing to me and I also loved the music!
@Tec4
6 жыл бұрын
Thanks, Mark. Just amazing and so pleased with outcome. The faults and errors are important for us novices to learn from.
@robbysmusic8507
2 жыл бұрын
Watched the whole series thank you sooooo much. 👍
@cameronwilson8561
4 жыл бұрын
Wow, that was a long series, but very informative, nice work
@Texstrat721
6 жыл бұрын
Really enjoyed following this build series.
@noalelkins1449
6 жыл бұрын
Looking forward to the KT88 build. I watched this whole series and enjoyed every part. By the time I got to the last couple of segments I came to the conclusion that it was a little bit more of a challenge than I thought so when you said you were thinking of doing the KT88 build I was really happy. Looking forward to it. Thanks!
@tongordebeke1355
6 жыл бұрын
Thanks, I enjoyed the video's, looking forward to the KT88 amp serie.
@briansilcox5720
4 жыл бұрын
Preparing for my first build, really learned a lot here... following through to the KT-88 series now. Thank you, very well presented, subscribed.
@lechonsantos2072
6 жыл бұрын
Thanks Mark for the very nice series. I will wait for your KT88 project.
@emonteirobr
6 жыл бұрын
Thanks a lot. I enjoyed the series a lot. The suggestion at the end, to begin with a more simple project is good, although all the things I learned from this project are invaluable
@dri50
6 жыл бұрын
Hi Mark, Thanks for this series. I have not watched every single one yet, but I will. I'm just getting back into tube amplifiers after about 45 years. I thought it would be interesting to see how much I remember (or more likely, is there any information left). Quite a bit of that knowledge is still in there. I'm looking forward to a future build.
@harveyellis6758
6 жыл бұрын
Very nice project. It turned out quiet well. Thanks for sharing. I learned many new things following along.
@HipocratesAG
6 жыл бұрын
Very nice, great work!... Can't wait to see that Kegger amp built!
@MrJoejim
6 жыл бұрын
Thanks Mark great series and an awesome amp! Can't wait for your KT88 build.
@YosemiteGuy
Жыл бұрын
very good series !!!
@vincentrobinette1507
4 жыл бұрын
If you don't mind me suggesting, I would put the global feedback resistors right on the cathodes of the input tubes, rather than at the output terminals. That way, that wire isn't an antenna, making it much less susceptible to picking up noise, or, becoming a "chime" to oscillation. I was a little nervous about the voltage difference between the cathode sleeves and the filament on the cascode pull-up tube on your second stage, but, I see you placed a voltage divider on the cathode heaters, which reduce that potential, by splitting the difference with the rest of the tubes in the amplifier. I think that will keep that voltage well within the rating of the pull-up tube.(cathode-filament) I'm glad to see the schematic, it explains that 3rd 6AQA.(you had me guessing) I just realized, that single ended output stages don't require phase splitters!
@1959Berre
6 жыл бұрын
Congratulations, great job! I enjoyed this series a lot.
@joeblogs8204
6 жыл бұрын
really enjoyed watching the build
@donnabrainard4665
6 жыл бұрын
Excellent series. Thanks
@bundylovess
6 жыл бұрын
Grate series mark awesome build Big thumbs up mate
@jeffjeff370
6 жыл бұрын
Hey Greetings from holland!! nice amp build!!! i Also made an triode dick amp 2x. a bill kt 88 and the phonodude. both great amps! I met the guy a few times and he told me to Always connect the speaker neutral to a ground only for safty! he is a real nice guy and Always very helpfull. keep the good work up, just like uncle doug. youre a great insparation fore us amateurs!!! Thanks!
@SoddingaboutSi
6 жыл бұрын
Very tempted to build one myself.
@qpiter
6 жыл бұрын
Well done! Appreciate every moment.
@paulkerr2298
6 жыл бұрын
Hi Mark, how are you? I kinda feel sad that this has come to its end,,,, i'v had fun with this and it's given me a lot of food for thought (never a bad thing) so from sunny Scotland a big thank you and keep well.Now get some sleep, you've earned it.
@wolfthegrey5165
5 жыл бұрын
please tell me which song plays you in 10 minutes 33 seconds
@stephenhughes3422
6 жыл бұрын
Hi mark thanks you have inspired me to have a go
@RobertKohut
6 жыл бұрын
Nice series!! Thanks for sharing!!
@epos79
4 жыл бұрын
well done sir!
@jamesmdeluca
3 жыл бұрын
Greetings: Repeat comment: Your as built chassis has the fuse holder wired between the IEC power connector LINE and the power switch.
@danielthomas3057
6 жыл бұрын
Hi Mark; I really enjoyed watching this whole series on this build. Very well done and well explained along the way. The amp turned out incredibly well. How about maybe designing and building a preamplifier with phono stage to go with it? Possibly using octal tubes such as 6SC7 or 6SL7 etc.
@rickg8015
6 жыл бұрын
Well done with the layout.. Maube try one of Alex Kitic’s RH SE amps for the next project. Simple too..
@lupoal4113
4 ай бұрын
fantastic series... unluckily the 6SN7 tube cost, now in 2024, not less the 40$ each here in Europe (not the top level, just the more common... for top level you can pay 150$ or more)
@patrickhaslam3332
3 жыл бұрын
Love your videos man. Brilliant. If anyone can help a stupid question, on the schematic there is a cap across the power switch, can’t the AC power just go through the cap and bypass the switch if it’s in Off position???
@prahladramesh6562
Жыл бұрын
I just finished building the 807 and it sounds great, but I am not able to use the negative feedback , it starts squealing . And also if I can get some advice to bring down the treble as it is very bright Thanks
@KEYSTONE223mobile
6 жыл бұрын
Thumbs Up Too Ya, Good Vid and Great Audio. . .,
@eduardosantiago8818
4 ай бұрын
Very nice tube amplifier. I’m just curious why in the diagram it shows two preamp tube 6SN7, but in actual you used three 6SN7 tube. I want to built also this amplifier. Thanks for the response
@Blueglow
4 ай бұрын
The schematic only shows one channel. Keep in mind the 6SN7 is really 2 tubes in one glass envelope. The schematic only shows one channel of the amplifier, for stereo you will need to duplicate it, once for each channel. With each channel having 3 stages, that means 6 total thus 3 tubes. The 1st gain stage of the schematic is put onto one side of the 1st glass tube for the Right Channel, the Left on the other side of that glass tube. So 1st tube has L&R channel flowing through it, then the 2nd & 3rd stages each use their own tube for each channel. Make sense?
@alexreeve
6 жыл бұрын
its aliiiiiiiiiive... good work!
@and1424
4 жыл бұрын
Hello. Why you connect the common wire of output transformer to buss ground? Thanks
@kubockferre5532
Жыл бұрын
Hi if i understand well about the led and resistor on the bias cathode you adjust the resistor value to be the same cathode voltage of the orininal shematic, am right.thanks to respond
@adamwolfram6126
3 жыл бұрын
Are the Kiwame resistors the same as KOA Speer SPR carbon film resistors? They sure look the same.
@SuperFredAZ
Жыл бұрын
Seems to me 9 X 9 = 81 multiply by .807 for rms, we get about 58 divided by 8 we get a bit over 7 watts
@zopilotesky3014
6 жыл бұрын
Great series! It's great that guys put themselves out there like this. Very educational. BTW, who is the band? Very good rendition of St James Infirmary. Great singer! Great string bending too! I'd buy a copy.
@lego40404
6 жыл бұрын
So Sad to see this series ended, now to watch the KT 88 , You mentioned the music was from your label? Can I get some info on it, that music was great
@mfr58
6 жыл бұрын
Big sound from a few watts! Great.M
@diabolicalartificer
6 жыл бұрын
Hi Mark, interesting video series. Don't think you mentioned it's THD. Two comments - 1) saw there were no fuses on the secondary/HT and 2) no bypass cap/s on the zener string.
@Blueglow
6 жыл бұрын
Rarely fuse the secondary/HT. There is a bypass on the zener string 10uf @ 400v
@diabolicalartificer
6 жыл бұрын
Apologies, missed the cap. Re secondary fuse - why?
@BC-fy1wn
6 жыл бұрын
Learning a ton TY BC
@stevenyork6712
6 жыл бұрын
great series but what was the value of the ntc thermistor? on the mains input we have a 240 volts in great briton
@Zigge
6 жыл бұрын
Would you consider using a solid state power supply in a build to reduce the cost? Why / why not?
@MrMannakin
6 жыл бұрын
Looking forwards to the KT88 build - I have a push-pull KT88 amp (built from a World Audio Design) kit, fantastic amp. Is that frequency response normal for a SET amp?
@Frustratedfool
6 жыл бұрын
Hi Mark - fantastic series - thanks for sharing. I can't see the thermistor on the BOM. What value did you use and why? Thanks again!
@turnersparadise8368
6 жыл бұрын
To tack on, what socket did you use for the 5U4? You only list 3 octal sockets and two 5 pin. Also, you list 10 zeners but only used 5.
@vsmichael1
4 жыл бұрын
It's only been playing 3 minutes so how is it gonna be hot?
@moodyga40
6 жыл бұрын
music is great do you have cds for sale amp is fantastic
@soundcode0246
5 жыл бұрын
What is the song at the end called?
@erwinflores6364
6 жыл бұрын
did you use a 807 tubes?
@daveanderson5680
6 жыл бұрын
What? No Hg rectifier for “blue glow electronics” wtf?
@Zigge
6 жыл бұрын
Thank you for a great series. It has really sparked my desire to try a build myself. A little prayer: I live in Europe. That means 240V mains.. could you make your builds dual voltage? :-)
@MrMannakin
6 жыл бұрын
About the only consideration should be the power transformer, it needs to have 240V inputs instead of 110V - the rest of the build should be the same?
@Zigge
6 жыл бұрын
I'm a novice in tube builds (not in general electronics) could you ad in a suggestion for a transformer with 240V inputs in the BOM - preferably one that are available in Europe? I don't know if the transformer has any impact on the amplifier itself, but to me it seems like it is very intimately connected to the amp as a whole...
@Frustratedfool
6 жыл бұрын
The listed 40-18029 classic tone power supply can be wired for either 110v or 240v depending on how you wire up the primary side. This is what I am using and I am in the U.K.. the downside is I had to import it from the USA, just like the output transformers. Hope this helps.
@Frustratedfool
6 жыл бұрын
Here is a link to the data sheet www.classictone.net/40-18029.pdf
@paulkerr2298
6 жыл бұрын
dude,, get your chokes from here www.primarywindings.com
@rayrvidal4199
6 жыл бұрын
Long time no see
@domingoarmesto7590
6 жыл бұрын
Porque no sse traduce a eespañol
@davidrapalyea7727
4 жыл бұрын
All of this is interesting but also seems to me maddeningly irrelevant. Class A single ended tube amps have been designed successfully for at least 3/4 of a century. Choose a few dozen and then build towards cost. Same thing with solid state. Who the hell cares what is the "amp of the year" when I can buy a rebuilt 1975 Marantz 1060 for $500. I suspicion hi fi electronic designed peaked generations ago and everything since is worse then mere commentary. Specifically, the 1975 Marantz has click stop tone controls for bass, mid and treble. It also has both high and low bypass filters for warped and scratchy vinyl barn finds. I use the high and low filters to this day. Rarely, but have you ever actually WATCHED a wicked bass excursion in the cone? It also has "loudness" button to automatically boost bass and treble at low operating levels. To say nothing of remote speaker switches and terminals. Further, I have nothing bad to say about the 1060. I have never heard anyone say anything bad about the 1060. In fact, the 1060 seems entirely invisible in my system. It feeds tight musical bass to my tight musical passive radiators in my two sets of 1975 KEF 104 speakers. Similar (ahem) to the Borchard 400 design. I recently ordered up a new system to compare. Specifically, I found a couple of Klipsch Heresey II for matching with my newly acquired single ended Reisong point to point wired A10 EL34 six watts per channel tube amp. Hifi descended into a fashion industry so long ago my old age and advanced state of decline does not much notice it. I simply stream Tidal MQA master into a bluetooth 5.0 Audioengine b1 then into my heritage system. My $700 1983 MFSL UHQR limited edition [5000] vinyl half speed master Sgt. Peppers has been sold. The shipping box was to AmConGen frankfurt and was never opened as a $55 investment.
@AndJusticeForAll...1985
Жыл бұрын
Good unit you built bitch, I’m proud of you for real
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