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WHY YOU LOVE IT SO MUCH EP 02 

A/Tech
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In this episode, we look at the Marshall JCM-800. Want to see and learn a little bit more about it? Stick around and you'll see why it's one of the most famous amps in the world.
Duncan Tone Stack Calculator: www.duncanamps...
Rob Robinette: robrobinette.c...

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26 авг 2024

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Комментарии : 27   
@TinHatRanch
@TinHatRanch Год назад
I️ just bought the parts yesterday to build something along the likes of a JCM 800! Great timing! You’ve got a great way of explaining how all of this works!
@Jem7sk
@Jem7sk 4 месяца назад
Your channel magically appeared in my YT feed yesterday.. Man, where has this channel been the past few years that I have been trying to teach myself to build tube amps. Great stuff.. the best I've seen. Looking forward to going through everything you have posted and also looking forward to more. Where'd you get that schematic?
@atech9020
@atech9020 Месяц назад
Wow, thank you!
@atech9020
@atech9020 Месяц назад
They are all on the web, just do a search of XYZ schematic.
@haytguugle8656
@haytguugle8656 8 месяцев назад
Nice vid; I too have never much liked the sound of the cathode follower->tone stack, so I've never paid them much mind. I do enjoy the sound of the JCM800, but have never wanted to own one. 🙂 Not having had the need to deal with cathode followers, I've never bothered to think about them much. So..... How is it that the grid of V2b (cathode follower) is ok seeing the 192V DC that is powering the plate of V2a with no coupling cap? What am I missing? I've seen other cathode follower circuits that are configured differently and do require coupling caps. Again; what's the science with this circuit?
@zabtej1645
@zabtej1645 9 дней назад
In case any ladies would join, an amp girl is a cool girl, cool girls don't mind cool antics so keep going
@Burkhimself
@Burkhimself Год назад
Man, I’d like to see a vid with you discussing the circuit differences between the 2204/2203 and the copied versions….peavey butcher, Laney pro tube, etc…..🤘🏼
@atech9020
@atech9020 Год назад
I will add those to my list.
@TheLamboman640
@TheLamboman640 6 месяцев назад
Awesome video! Question: how do cathode followers work with respect to electron flow? Normally electrons flow from the cathode to the plate and exit there. How do they originate and exit at the cathode? What purpose do the grid and plate have? Thanks!
@ManuelSurgenor
@ManuelSurgenor 5 месяцев назад
I think you’re mixing up the two types of voltage that are on the tube. The DC still works like you suggested. The difference is the AC signal will exit the cathode instead of the plate and then be passed to the grid of the next tube. Also, when, using a cathode follower, the AC signal will be unaffected, where typically the AC signal would exit the plate before going to the next stage and would be flipped inverse.
@TheLamboman640
@TheLamboman640 5 месяцев назад
@@ManuelSurgenor no I was talking specifically ac signal voltage. Tubes are diodes where electrons only move in 1 direction-cathode to plate. So how does the signal on the grid travel in reverse to the cathode? And what purpose does a positively charged plate have in this situation?
@ManuelSurgenor
@ManuelSurgenor 5 месяцев назад
@@TheLamboman640 what I said above still stands. The electron flow from the cathode still boils off to the plate like you mentioned. The incoming AC signal can then be sent out of the plate of the tube on to the next stage, or it can be sent out through the cathode to the next stage. It really comes down to which side of the tube that you place the coupling cap on to go to the next stage. You can couple the next stage from the plate or the cathode of the previous tube. If you notice on a cathode follower, you’ll see a coupling cap on the cathode to pass AC. The DC powering the tube is still B+ on the plate and ground on the cathode, but the AC signal can pass through either end of the tube or both in some types of phase inverters.
@TheLamboman640
@TheLamboman640 5 месяцев назад
@@ManuelSurgenor I understand everything you said, the only part that hangs me up is how the signal can exit the cathode when its a diode… electron flow is only going from cathode to plate. There is nothing traveling from the plate or grid to the cathode.
@TheLamboman640
@TheLamboman640 5 месяцев назад
@@ManuelSurgenor even with a coupling cap on the cathode, there is still the B+ on the plate attracting electrons from the cathode to the plate thus having only 1 direction of electron flow. How do electrons enter the tube at the cathode and also exit at the cathode?
@miguelrichartmellado2834
@miguelrichartmellado2834 Год назад
👍👍
@qujo777
@qujo777 Год назад
When you see a typical - do you mean normal or abnormal? Or not miraculous as to say, that it is something one you should expect. Other than that I appreciate the explanation of the amp.
@atech9020
@atech9020 Год назад
A-typical to me means, normally, regularly, consistently, or commonly.
@dougietamson
@dougietamson Год назад
@@atech9020 maybe put a pause between saying the 2 words 'a' and 'typical' as there is a word 'atypical' which means the opposite of typical. The as a single word, 'a' part negates the meaning, eg as in asymmetric. You do sound like you are saying 'atypical' ie the opposite of typical, kind of confusing.
@LeviBulger
@LeviBulger Год назад
​@@atech9020atypical means literally the opposite of what you are saying.
@atech9020
@atech9020 Год назад
@@LeviBulger yes, we went over this already. Has been fixed.
@miguelrichartmellado2834
@miguelrichartmellado2834 Год назад
Hello frend. Do you have any video that explains how the resistors working the G1 and G2 bars? of EL34 tubes ? tips for KT77 or 6550/KT88. Thank you Frend.
@atech9020
@atech9020 Год назад
I do not specifically. But will add that to my to do.
@miguelrichartmellado2834
@miguelrichartmellado2834 Год назад
@@atech9020 Thank you.
@zabtej1645
@zabtej1645 9 дней назад
POWER POINT LOL
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