Tube orientation for new chassis
Moderators: Daviedawg, Graydon, CurtissRobin, colossal, zaphod_phil
- gkwallace
- Newbie
- Posts: 56
- Joined: Thu 11/28/19 2:16 pm
Tube orientation for new chassis
Is there a standard for tube orientation when drilling a new chassis?
Some amps, would benefit from having pins 4 & 5 facing away from their respective side of the chassis (for a 12AX7 for instance).
I've seen it all different ways.
Does it matter at all, disregarding ease of build?
Thoughts?
Some amps, would benefit from having pins 4 & 5 facing away from their respective side of the chassis (for a 12AX7 for instance).
I've seen it all different ways.
Does it matter at all, disregarding ease of build?
Thoughts?
0 x
- Bieworm
- Verbose Moderator
- Posts: 2416
- Joined: Mon 02/10/20 8:24 am
- Location: Belgium
Re: Tube orientation for new chassis
I like to arrange them so the heater wires can be tucked in the long side corner of the chassis, with the shortest way to the tubes. So pin 4-5 pointing to the backside of the chassis.
2 x
"THIS should be played at high volume..preferably in a residential area"
- gkwallace
- Newbie
- Posts: 56
- Joined: Thu 11/28/19 2:16 pm
Re: Tube orientation for new chassis
Exactly! but I see them different ways. I was wondering if orientation of the actual grid had any effect on rf noise. It my be a fun experiment.
0 x
- JMPGuitars
- Super Duper Admin
- Posts: 4107
- Joined: Tue 09/18/12 8:00 pm
- Location: South Central, MA
- Contact:
Re: Tube orientation for new chassis
It's not the orientation of the wires as much as the relationship between them. Certain wires need to avoid being run parallel to others for example.
1 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright
Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info
Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale
Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info
Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale
- gkwallace
- Newbie
- Posts: 56
- Joined: Thu 11/28/19 2:16 pm
Re: Tube orientation for new chassis
I understand the wires need to be correct, I was wondering about internal components of a tube.
I watched a demo on how transformer orientation and position greatly affects noise. So simple, but often ignored.
It's just my ocd geek brain working overtime in public.
I watched a demo on how transformer orientation and position greatly affects noise. So simple, but often ignored.
It's just my ocd geek brain working overtime in public.
0 x
- JMPGuitars
- Super Duper Admin
- Posts: 4107
- Joined: Tue 09/18/12 8:00 pm
- Location: South Central, MA
- Contact:
Re: Tube orientation for new chassis
But what does that mean to you? Correctly wired is not ambiguous. But how the wires are run, and what they're next to can be. The biggest one is to avoid running the grid and plates parallel.
1 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright
Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info
Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale
Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info
Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale
- gkwallace
- Newbie
- Posts: 56
- Joined: Thu 11/28/19 2:16 pm
Re: Tube orientation for new chassis
I am no expert but my Soldano SLO is wired completely different than a Marshall. ie bus wire in straight lines parallel for the heaters. So, although not ambiguous, not without variance. Rift amps makes really bitchen amps and all his heater wires are twitsed, but straight up from the sockets, floating in the air. Not next to the chassis like we normally do it. I like the utility of doing it that way, but it kinda worries me to do it on mine.JMPGuitars wrote: ↑Sat 10/26/24 9:39 pmBut what does that mean to you? Correctly wired is not ambiguous. But how the wires are run, and what they're next to can be. The biggest one is to avoid running the grid and plates parallel.
0 x
- gkwallace
- Newbie
- Posts: 56
- Joined: Thu 11/28/19 2:16 pm
Re: Tube orientation for new chassis
I just reread what you wrote and now I understand what you're saying. It's not the position of anything, it's the relationship in orientation to all the parts and wires. You could do any crazy orientation or layout you wanted if none of the basic principles are violated, ie, power transformers away from preamp, main power in on own ground near input, etcJMPGuitars wrote: ↑Sat 10/26/24 9:39 pmBut what does that mean to you? Correctly wired is not ambiguous. But how the wires are run, and what they're next to can be. The biggest one is to avoid running the grid and plates parallel.
1 x
- Bieworm
- Verbose Moderator
- Posts: 2416
- Joined: Mon 02/10/20 8:24 am
- Location: Belgium
Re: Tube orientation for new chassis
Main power should have a dedicated ground, but not near the input. Unless you mean power cord inlet (IEC?)gkwallace wrote: ↑Sun 10/27/24 12:48 pmI just reread what you wrote and now I understand what you're saying. It's not the position of anything, it's the relationship in orientation to all the parts and wires. You could do any crazy orientation or layout you wanted if none of the basic principles are violated, ie, power transformers away from preamp, main power in on own ground near input, etcJMPGuitars wrote: ↑Sat 10/26/24 9:39 pmBut what does that mean to you? Correctly wired is not ambiguous. But how the wires are run, and what they're next to can be. The biggest one is to avoid running the grid and plates parallel.
0 x
"THIS should be played at high volume..preferably in a residential area"
- gkwallace
- Newbie
- Posts: 56
- Joined: Thu 11/28/19 2:16 pm
Re: Tube orientation for new chassis
Yes.Bieworm wrote: ↑Mon 10/28/24 4:31 pmMain power should have a dedicated ground, but not near the input. Unless you mean power cord inlet (IEC?)gkwallace wrote: ↑Sun 10/27/24 12:48 pmI just reread what you wrote and now I understand what you're saying. It's not the position of anything, it's the relationship in orientation to all the parts and wires. You could do any crazy orientation or layout you wanted if none of the basic principles are violated, ie, power transformers away from preamp, main power in on own ground near input, etcJMPGuitars wrote: ↑Sat 10/26/24 9:39 pm
But what does that mean to you? Correctly wired is not ambiguous. But how the wires are run, and what they're next to can be. The biggest one is to avoid running the grid and plates parallel.
Thanks for prompting clarification.
1 x