Search found 13153 matches
- Sat Apr 27, 2024 1:24 pm
- Forum: Dumble Discussion
- Topic: Bonamassa new amp day
- Replies: 24
- Views: 877
Re: Bonamassa new amp day
In a recent YouTube clip he essentially said that if you’re mad that he bought a dumble amp, then the next time one’s up for sale go ahead and buy it. JB just dropped a notch in my estimation. Why? I think he truly appreciates the gear he has. I could be wrong… Got a link to that YouTube? I realize...
- Sat Apr 27, 2024 12:54 am
- Forum: Dumble Discussion
- Topic: Starting to populate the chassis....
- Replies: 103
- Views: 3731
Re: Starting to populate the chassis....
You will not regret investing $120 in a Weller WE1010NA or Hakko FX888D-29BY soldering station.
- Fri Apr 26, 2024 9:36 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 12
- Views: 292
Re: The Much Anticipated (?) Bluesmaster Build Thread
I’ve never opened one up, but it looks like the brass screw is a worm drive gear. In this case it’s very compact and makes the adjustment easy to access.
- Fri Apr 26, 2024 6:48 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 12
- Views: 292
Re: The Much Anticipated (?) Bluesmaster Build Thread
UJust to be sure; I’m using the “Separate Masters HRM, Bluesmaster” connections, correct? Correct. One of these 25-turn Bourns trimmers https://www.mouser.com/ProductDetail/Bourns/PV36X504C01B00?qs=ifmdR88tEJ9yfzS1pF2%2Fqg%3D%3D soldered to your PAB relay board would work for the variable lift. Ben...
- Fri Apr 26, 2024 4:28 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 12
- Views: 292
Re: The Much Anticipated (?) Bluesmaster Build Thread
HAD used different relay PCB's for the OD and PAB, which seems silly when a generic board can be used for either. The connections in the boards .pdf use the universal relay PCB shown there, or you can use the C/NC/NO references to use any other DPDT relay board.
- Fri Apr 26, 2024 12:33 pm
- Forum: Dumble Discussion
- Topic: Starting to populate the chassis....
- Replies: 103
- Views: 3731
- Fri Apr 26, 2024 11:30 am
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 12
- Views: 292
Re: The Much Anticipated (?) Bluesmaster Build Thread
You might consider adding a link in your 102 build thread to its follow-up impressions thread too.
- Fri Apr 26, 2024 10:05 am
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 12
- Views: 292
Re: The Much Anticipated (?) Bluesmaster Build Thread
I hope my build threads are helpful to those who want to try but have no background in this... The Q&A leading up to this (six pages) is useful too, and it will get lost if it's not linked: https://ampgarage.com/forum/viewtopic.php?p=464413#p464413 The main filter board looks great! I think this is...
- Thu Apr 25, 2024 11:03 pm
- Forum: Dumble Discussion
- Topic: Bluesmaster HRM question:
- Replies: 90
- Views: 2792
Re: Bluesmaster HRM question:
If you are likely to be around 50-100k, I would say go for a 500k trimmer. 10-20% of rotation for the partial boost, and 500k is only about 1 dB down from full lift.
- Thu Apr 25, 2024 10:28 pm
- Forum: Dumble Discussion
- Topic: Bluesmaster HRM question:
- Replies: 90
- Views: 2792
Re: Bluesmaster HRM question:
If you are looking at my boards .pdf, you're correct, it uses Com2-NC2 as the path to ground. The layout shows the other set of contacts being used to open the mid pot wiper-CW short, which will have no effect on the PAB if the ground is lifted 22M. Interestingly, if a partial lift is used, then set...
- Thu Apr 25, 2024 9:26 pm
- Forum: Dumble Discussion
- Topic: Bluesmaster HRM question:
- Replies: 90
- Views: 2792
Re: Bluesmaster HRM question:
Yes. You wire the pot as a variable resistor, and when the relay contacts are open it becomes the resistance to ground. If the trimmer is on the bus then there are two ground paths.Raoul Duke wrote: ↑Thu Apr 25, 2024 9:10 pm So put the trimmer connecting Com1 and NC1 - one side and wiper?
- Thu Apr 25, 2024 8:50 pm
- Forum: Dumble Discussion
- Topic: Bluesmaster HRM question:
- Replies: 90
- Views: 2792
Re: Bluesmaster HRM question:
The biggest mistake I made when I first started building these amps however many years ago was to try to outwit Dumble with "tweaks" instead of trying to understand his original design intention. It's an urge that I have difficulty with to this day.....but I am working hard not to succumb! To concl...
- Thu Apr 25, 2024 1:00 pm
- Forum: Dumble Discussion
- Topic: Bluesmaster HRM question:
- Replies: 90
- Views: 2792
Re: Bluesmaster HRM question:
Yes! Thanks Erwin. Clever way to add that feature.
- Thu Apr 25, 2024 12:51 pm
- Forum: Garage Talk
- Topic: Stirs Neural pot
- Replies: 27
- Views: 811
Re: Stirs Neural pot
This is one of the laws of thermodynamics.
- Thu Apr 25, 2024 12:13 pm
- Forum: Dumble Discussion
- Topic: Bonamassa new amp day
- Replies: 24
- Views: 877