What are the voltages at the top and bottom of the drain resistor?
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- Sat May 11, 2024 3:01 pm
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 46
- Views: 2112
Re: 2nd Gen Build
- Sat May 11, 2024 1:08 pm
- Forum: FAQs
- Topic: Tube amp grounding article/info/links
- Replies: 25
- Views: 80340
Re: Tube amp grounding article/info/links
Thanks Dai.
Moderators, maybe this thread should be moved to the new FAQ area?
Moderators, maybe this thread should be moved to the new FAQ area?
- Sat May 11, 2024 1:00 pm
- Forum: Dumble Discussion
- Topic: Robben Ford & His Dumble Overdrive Special
- Replies: 8
- Views: 203
Re: Robben Ford & His Dumble Overdrive Special
To be fair, the Robben part of the video was a fraction of the overall time. He's talked about his Dumble amps and his introduction to and friendship with HAD many times before, but there always seems to be something new. I agree hearing different players and different guitars was really valuable, a...
- Sat May 11, 2024 12:25 pm
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 46
- Views: 2112
Re: 2nd Gen Build
If that is just heater glow you are seeing through the hole in the tube base I wouldn't worry about it. Are you seeing that through the gap between the index pin and the socket? Might the odor be transformer varnish?
- Fri May 10, 2024 10:37 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 42
- Views: 1384
Re: The Much Anticipated (?) Bluesmaster Build Thread
I was trying to come up with a rationale, but in the end at 120V the current limit will be the same, Bulb Wattage/120
- Fri May 10, 2024 10:18 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 42
- Views: 1384
Re: The Much Anticipated (?) Bluesmaster Build Thread
I usually plug the limiter into the Variac, but I'm not sure that it matters.
- Fri May 10, 2024 8:59 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 42
- Views: 1384
Re: The Much Anticipated (?) Bluesmaster Build Thread
A Variac and a bulb limiter is the best arrangement.
- Fri May 10, 2024 8:53 pm
- Forum: Dumble Discussion
- Topic: My take on a 2nd Gen ODS
- Replies: 89
- Views: 2666
Re: My take on a 2nd Gen ODS
The relay spec should be fine. More likely some wiring error, but you say “sometimes” cuts out, which sounds like a faulty switch or relay.
- Fri May 10, 2024 6:42 pm
- Forum: Dumble Discussion
- Topic: My take on a 2nd Gen ODS
- Replies: 89
- Views: 2666
Re: My take on a 2nd Gen ODS
I worked on it some more last night but forgot to write the voltages down. From testing things earlier everything seemed ok, just a tad lower than what is on the layout and schematics since I had my variac running at ~115VAC to get the heaters right at 3.15VAC on both sides. I was thinking verify t...
- Fri May 10, 2024 5:14 pm
- Forum: Dumble Discussion
- Topic: Robben Ford & His Dumble Overdrive Special
- Replies: 8
- Views: 203
Re: Robben Ford & His Dumble Overdrive Special
What a great interview! Nice of them to zoom in on the SN stamp ;^), and this has to be the gold standard 102 sound sample.
Thanks for posting!
Thanks for posting!
- Fri May 10, 2024 1:27 pm
- Forum: Dumble Discussion
- Topic: The balance trimmer this stranger
- Replies: 3
- Views: 87
Re: The balance trimmer this stranger
Pinned in D discussion section:
https://ampgarage.com/forum/viewtopic.p ... 89#p416389
https://ampgarage.com/forum/viewtopic.p ... 89#p416389
- Fri May 10, 2024 11:00 am
- Forum: Dumble Discussion
- Topic: My take on a 2nd Gen ODS
- Replies: 89
- Views: 2666
Re: My take on a 2nd Gen ODS
I was about to say that to keep the 2nd gen's loading on the OD output, delete the 180k to ground and the 1Meg series resistor and go straight into a 250k pot for the added Ratio control. ...Should I pull the 180K and 1Meg resistor as the amp is now or is that for when it has been changed to the hy...
- Fri May 10, 2024 10:09 am
- Forum: Garage Talk
- Topic: Anyone else having issues with the board?
- Replies: 10
- Views: 199
- Fri May 10, 2024 10:03 am
- Forum: Garage Talk
- Topic: Anyone else having issues with the board?
- Replies: 10
- Views: 199
Re: Anyone else having issues with the board?
Right now ampgarage.com is extremely slow/ not responding. I tried to answer some PM, after half an hour I gave up. This is showing up when answering a PM: That's the same error I was seeing when trying to view "New posts". Clearing the browser history fixed it. I just successfully sent and replied...
- Fri May 10, 2024 7:45 am
- Forum: Dumble Discussion
- Topic: My take on a 2nd Gen ODS
- Replies: 89
- Views: 2666
Re: My take on a 2nd Gen ODS
Have you made a voltage survey of the preamp?