6SQ7 EL34 Tube Audio Amplifier: Ground and Wiring Design.

[@martinburns7928]

Two Years Ago ? I've been searching for you going on at least two years, Glad to have found your sight, Right off the bat, Your explanatory about cutting to the chase by not involving redundant simplicities impressed me immediately, Godspeed Miss

[@SkunkieDesignsElectronics]

Welcome aboard!

[@kubockferre5532]

good job i love your work

[@SkunkieDesignsElectronics]

Thank you so much 😀

[@roroseppel2077]

Very nice job, I really enjoy your videos ! You could also wire the filaments wire with the same colour in respect to pin 2 (Blue) and pin 8 (Yellow) of the EL34

[@SkunkieDesignsElectronics]

Good tip!

[@primepreowned1]

Great Job 👍

[@ianmorgan6104]

Great video, would you call that parallel heater wiring to the tubes? Thanks

[@SkunkieDesignsElectronics]

Hmm I usually just call it heater wiring but sometimes slip and call it heater windings, probably because they are "wound" or twisted as a pair?

[@ianmorgan6104]

Oh what I meant was are the heaters wired in parallel or series on that particular amp? Apologies for not being clearer :)

[@nuttyl283]

Ground is important but some tubes need directly chassis ground from pin not electrical ground. Shortest path ground from electrical ground to chassis ground is very important.

[@SkunkieDesignsElectronics]

Such as? That seems like an invitation to a ground loop.

[@nuttyl283]

@@SkunkieDesignsElectronics Pin 5 of 4P1L and many russian tubes.

[@SkunkieDesignsElectronics]

@@nuttyl283 Possibly if you are trying to use a common transformer winding on a center tapped direct heated tube, but that seems like a very rare situation. Do you have a link with more info on this issue? I can't find anything on a google search that covers this. I'm trying to keep things simple on this channel and not confuse viewers with rare/obscure situations we are not delving into. In any case I have seen, using the chassis itself for multiple ground points (especially without running a wire from this point to the star ground) is a very, very bad idea.

[@nuttyl283]

@@SkunkieDesignsElectronics such as 7W7 en.wikipedia.org/wiki/List_of_vacuum_tubes

[@nuttyl283]

@@SkunkieDesignsElectronics I think chassis pin of some tubes just help release noise to chassis ground to earth. There is no ground loop due to it just a shield of the tube design. As long as electrical ground is not loop. there should be no hum or buzz. PS ferrite beads of all tube pin wiring except filament is useful too.

[@Warclock07]

Does the volume pot use for sweet spot? I saw some amps have and others don't. What exactly the benefit of it?

[@SkunkieDesignsElectronics]

I like for my amps to use between 40-70% position on the knob with the intended speakers.

[@Warclock07]

@@SkunkieDesignsElectronics Without the pot, is it like 100% all the time?

[@SkunkieDesignsElectronics]

@@Warclock07 Yes, you would have to control the volume with the input signal strength, like with an external passive control or an active one like a pre-amp.

[@Warclock07]

@@SkunkieDesignsElectronics Thank you so much. The schematic of my amp has the pot but there is non on the amp. I will install one to see what happen.

[@markmckelvey6515]

Is that a body work tool?

[@SkunkieDesignsElectronics]

It's a dolly, can be used for body or or any kind of metal fab work.

[@SenakaSandagomiWeerawardena]

I was waiting for this Mam thanks 😊. Please reply to my email.

[@SkunkieDesignsElectronics]

I don't see any email/message, please resend.