Search found 13224 matches
- Mon May 13, 2024 6:25 pm
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 29
- Views: 735
Re: ODS 102 with 2x KT88s and built-in Dumbleator
Am I seeing right that I may be able to take my heater supply and use it to feed the power for the relay switching? Or is that generally more trouble than using one of these 12V transformers? I think it's simpler to use a separate transformer for the relays. You can use 12VAC and a bridge, or 6VAC ...
- Mon May 13, 2024 4:47 pm
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 29
- Views: 735
Re: ODS 102 with 2x KT88s and built-in Dumbleator
... and trying to figure out what transformer works well for the relay power... Raoul Duke posted a data sheet for this small Triad for relay power using a FWB: https://www.mouser.com/ProductDetail/Triad-Magnetics/F-216X?qs=b1anAsPanWyvCrSmsu4ZQw%3D%3D This Hammond is also a possibility for FWB: ht...
- Mon May 13, 2024 4:16 pm
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 29
- Views: 735
Re: ODS 102 with 2x KT88s and built-in Dumbleator
There's info on these in the ODS boards .pdf here https://ampgarage.com/forum/viewtopic.php?f=5&t=29630
- Sun May 12, 2024 8:46 pm
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 56
- Views: 2553
Re: 2nd Gen Build
I did a bit of that and noticed it cleaned up well. If I can live with it that way and not have to alter the circuit that would be ideal. If not, the dual masters is a good plan. I never run two cabs anyways. The only bit of the circuit you would need to modify is between the OD2 coupling cap and O...
- Sun May 12, 2024 2:01 pm
- Forum: Technical Discussion
- Topic: Hypothetical Amp Discussion
- Replies: 9
- Views: 358
Re: Hypothetical Amp Discussion
I already have something like this set up on an HX Stomp on my board at the moment, and it does sound great, but we started laughing at the idea of having both loops being tube-driven... And joked that we might as well throw in a tube-driven reverb tank in there too. That's a lot of tubes! 4 preamp...
- Sat May 11, 2024 10:05 pm
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 56
- Views: 2553
Re: 2nd Gen Build
Yes try changing the bias point. The gain should rise sharply at some point and then level off.
- Sat May 11, 2024 3:01 pm
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 56
- Views: 2553
Re: 2nd Gen Build
What are the voltages at the top and bottom of the drain resistor?
- Sat May 11, 2024 1:08 pm
- Forum: FAQs
- Topic: Tube amp grounding article/info/links
- Replies: 26
- Views: 80531
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: 15
- Views: 497
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: 56
- Views: 2553
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: 1455
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: 1455
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: 1455
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: 2759
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: 2759
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...