Search found 971 matches
- Tue Apr 01, 2025 1:15 am
- Forum: PCB Design
- Topic: 183 Preamp PCB layout for 1U chassis
- Replies: 6
- Views: 590
Re: 183 Preamp PCB layout for 1U chassis
Hi. I was looking at your board in PCB-Way Gerber viewer. I wanted to ask if these ( yellow arrow) are screw in terminals for the wires connections to the pre amp tubes for example. Also what are the dimensions of your preamp board? ** Hey, Guy - those are connectors with a 3.5mm pitch from the Mol...
- Sat Mar 29, 2025 3:18 pm
- Forum: PCB Design
- Topic: 183 Preamp PCB layout for 1U chassis
- Replies: 6
- Views: 590
Re: 183 Preamp PCB layout for 1U chassis
Hi.
I was looking at your board in PCB-Way Gerber viewer.
I wanted to ask if these ( yellow arrow) are screw in terminals for the wires connections to the pre amp tubes for example.
Also what are the dimensions of your preamp board?
Thanks!
Cheers
G
I was looking at your board in PCB-Way Gerber viewer.
I wanted to ask if these ( yellow arrow) are screw in terminals for the wires connections to the pre amp tubes for example.
Also what are the dimensions of your preamp board?
Thanks!
Cheers
G
- Tue Mar 11, 2025 2:29 pm
- Forum: Dumble Discussion
- Topic: Artifacts on F#
- Replies: 14
- Views: 1469
Re: Artifacts on F#
Make sure every single wire run that requires a shieled cable has one. Try using a chop stick to move the signal wires in the preamp section and see if the noise goes away.
Be very careful doing this since the voltages here are dangerous.
Cheers
G
Be very careful doing this since the voltages here are dangerous.
Cheers
G
- Mon Mar 10, 2025 5:48 pm
- Forum: Dumble Discussion
- Topic: Dumble Bandmaster Gator UltraPhonix Build
- Replies: 52
- Views: 14309
Re: Dumble Bandmaster Gator UltraPhonix Build
That's great news! Congrats Ryan.
Soon you will have to start cranking out a bunch of these amps!
Cheers
Guy
Soon you will have to start cranking out a bunch of these amps!
Cheers
Guy
- Wed Mar 05, 2025 7:10 pm
- Forum: Marshall Discussion
- Topic: Calculating required transformer voltage specs for 100w marshall
- Replies: 18
- Views: 3074
Re: Calculating required transformer voltage specs for 100w marshall
Just as a reference point on the real world final B+ for the Hammond 290HX 100 watt power trans. I have used these on builds for 4x6L6 tube amps with 3 preamp tubes ( much like an older Marshall amp except the 6L6). I consistently get 463v on the plates of the 4 x 6L6GC JJ tubes with 120v wall volta...
- Tue Mar 04, 2025 7:25 pm
- Forum: Technical Discussion
- Topic: Error 429 Too many requests
- Replies: 14
- Views: 1245
Re: Error 429 Too many requests
Strange that we were able to have over 1000 users on line in the past (2020) and now it can't handle a fraction of that.
Cheers
G
Cheers
G
- Sun Mar 02, 2025 5:35 pm
- Forum: FAQs
- Topic: Stereo power amp
- Replies: 1
- Views: 4080
Re: Stereo power amp
Hi. Any tips on where to find layout of a stereo power amp? Say 20-30watt? Hi, EL34World has a nice Stereo power amp project. I haven't tried it but the guys there build great projects! https://el34world.com/projects/StereoPowerAmp1.htm There are also several other Stereo power amp projects on ther...
- Tue Feb 25, 2025 11:21 pm
- Forum: PCB Design
- Topic: Channel switcher PCB
- Replies: 15
- Views: 20902
Re: Channel switcher PCB
I made a new channel switcher using Arduino Nano Every. It's been years since I did any kind of programming but I tried to make the Arduino sketches as simple as possible. The same PCB can be used in an amp to control relays and in a pedal to remotely control the channel switching. Schematic channe...
- Sun Feb 09, 2025 3:38 pm
- Forum: Dumble Discussion
- Topic: Another Dumbleator
- Replies: 7
- Views: 2641
Re: Another Dumbleator
Nice work with the Dremel. I used the same chassis to make mine yrs ago except I used the Hammond black powder coated steel chassis and it was a lot harder to cut the steel. Nice thing about the powder coating is that nowadays with the cheaper fiber lasers you can laser off the powder to label the c...
- Tue Jan 28, 2025 10:41 pm
- Forum: Dumble Discussion
- Topic: Brownface bandmaster ultraponic build
- Replies: 9
- Views: 2447
Re: Brownface bandmaster ultraponic build
Love those brown face fender faceplates!
Cheers
G
Cheers
G
- Wed Jan 22, 2025 9:12 pm
- Forum: Technical Discussion
- Topic: Guitar Amp Wiring Notes
- Replies: 17
- Views: 1715
Re: Guitar Amp Wiring Notes
Over time, I wind up writing replies to questions on wiring inside amps. My time is sliced up into little sections, so I have started saving these bits and when I can, sanitizing and interlacing them into some kind of overall whole. Over a period of some months, that finally got linked up into a ba...
- Wed Jan 22, 2025 2:32 pm
- Forum: Dumble Discussion
- Topic: AN Wonderland/JM 100w layout
- Replies: 312
- Views: 150065
Re: AN Wonderland/JM 100w layout
Love the suede finish. Congrats! I am also a fan of the Celestion G12-65 speakers for this amp. The EV12L and the Celestion V Type 70 also sound amazing with this amp. I see Dorrisant mentioned the Eminance 12N. I like that this speaker is lighter. I will have to give that one a try. It would be a g...
- Sun Jan 19, 2025 6:21 am
- Forum: Dumble Discussion
- Topic: Steel String Singer #005 build
- Replies: 55
- Views: 9440
Re: Steel String Singer #005 build
As for my thread about the #002 build: I initially started this whole journey with the idea of building some sort of Steel String Singer. About half a year ago I stumbled upon this forum, found Erwin's thread and being the quick thinker that I am bought one of his chassis. Just a few weeks later I ...
- Wed Jan 15, 2025 9:10 pm
- Forum: Garage Talk
- Topic: Chassis Maker Recommendations
- Replies: 34
- Views: 10037
Re: Chassis Maker Recommendations
An FYI: I just reached out to Seaside about a chassis and was informed that Terry had passed away in December. Very sad to hear - it seems like this was a vendor that offered great quality chassis work. Sorry to hear that. He built a small custom chassis for me last year & I was just thinking this ...
- Sun Jan 05, 2025 5:16 am
- Forum: Dumble Discussion
- Topic: Cabinet questions
- Replies: 6
- Views: 1678
Re: Cabinet questions
Ok, so forgive this very primitive markup. :? :) Is this roughly correct? Screen set back apprx 8mm or 3/8” from front of cabinet. Chassis set back apprx 1 1/8” from front of cabinet, and about 1/4 from the cutout above it. I just want to be in the ballpark so it doesn’t seem completely off, LOL. H...