Dumble ODS 102 build
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Dumble ODS 102 build
Here is the Dumble ODS 102 Build I have nearly done (Just grounding and Transfomers yet to finish/Order)
I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in the UK to go with it.
I will need to plate over the Cap Can opening as im not utilising this bit - I have no idea how to go about doing this bit.
The PCB was used courtesy of AA Electronics (Fantastic quality boards btw).
I have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
What Speakers do other people use? I may have more questions too.
I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in the UK to go with it.
I will need to plate over the Cap Can opening as im not utilising this bit - I have no idea how to go about doing this bit.
The PCB was used courtesy of AA Electronics (Fantastic quality boards btw).
I have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
What Speakers do other people use? I may have more questions too.
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- martin manning
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Re: Dumble ODS 102 build
You can do that with a multimeter. See here: https://ampgarage.com/forum/viewtopic.p ... 75#p417375desertmouth90 wrote: ↑Tue Apr 23, 2024 1:31 pmI have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
Re: Dumble ODS 102 build
For the Cap Can opening try these covers
Glenn
I solder better than I play.
I solder better than I play.
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Re: Dumble ODS 102 build
Sorry to hear about the bad trade situation.desertmouth90 wrote: ↑Tue Apr 23, 2024 3:47 pmSadly im based in the UK, my mate sent me some cracker barrel pancake mixture to my home in London once and I was hounded by FedEx to pay £37... the mixture was $9.
UK and US trade is not great.
Those plugs are fairly common here, I've seen them at electrical supply merchants. Perhaps something similar is available in thr UK.
Glenn
I solder better than I play.
I solder better than I play.
Re: Dumble ODS 102 build
Why not use Hammond Twin transformers from Mouser? No tax shipping or duty to pay and they normally turn up in 3 days from USAdesertmouth90 wrote: ↑Tue Apr 23, 2024 1:31 pm Here is the Dumble ODS 102 Build I have nearly done (Just grounding and Transfomers yet to finish/Order)
I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in the UK to go with it.
I will need to plate over the Cap Can opening as im not utilising this bit - I have no idea how to go about doing this bit.
The PCB was used courtesy of AA Electronics (Fantastic quality boards btw).
I have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
What Speakers do other people use? I may have more questions too.
https://www.mouser.co.uk/ProductDetail/ ... sBoQ%3D%3D
https://www.mouser.co.uk/ProductDetail/ ... OQaQ%3D%3D
Re: Dumble ODS 102 build
As for speakers, 150w Swamp Thang in Thiele cab works great or Celestion G12-65s in open back.
Many use EV 12 but I found them good only at gig volumes.
Many use EV 12 but I found them good only at gig volumes.
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Re: Dumble ODS 102 build
Would you say these are better choices than the Tube Towns? they are more expensive. I have the Hammond 194B choke already.rogb wrote: ↑Tue Apr 23, 2024 6:14 pmWhy not use Hammond Twin transformers from Mouser? No tax shipping or duty to pay and they normally turn up in 3 days from USAdesertmouth90 wrote: ↑Tue Apr 23, 2024 1:31 pm Here is the Dumble ODS 102 Build I have nearly done (Just grounding and Transfomers yet to finish/Order)
I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in the UK to go with it.
I will need to plate over the Cap Can opening as im not utilising this bit - I have no idea how to go about doing this bit.
The PCB was used courtesy of AA Electronics (Fantastic quality boards btw).
I have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
What Speakers do other people use? I may have more questions too.
https://www.mouser.co.uk/ProductDetail/ ... sBoQ%3D%3D
https://www.mouser.co.uk/ProductDetail/ ... OQaQ%3D%3D
My Multimeter Doesnt do that, I may need to buy another.martin manning wrote: ↑Tue Apr 23, 2024 1:37 pmYou can do that with a multimeter. See here: https://ampgarage.com/forum/viewtopic.p ... 75#p417375desertmouth90 wrote: ↑Tue Apr 23, 2024 1:31 pmI have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
Re: Dumble ODS 102 build
Sorry I don't know about Tube Town transformers. I've used Hammond Classictone (no longer available) and Mercury (very expensive). I know folks in the USA use Heyboer. Find out who makes their ones and make the decision. Inmadout in Italy are also good.
Bear in mind EU products may be subject to shipping and duties plus handling to UK. With Mouser it's all taken care of.
Bear in mind EU products may be subject to shipping and duties plus handling to UK. With Mouser it's all taken care of.
Re: Dumble ODS 102 build
If your multimeter doesn't read mV, best get another one I think.desertmouth90 wrote: ↑Tue Apr 23, 2024 10:42 pmWould you say these are better choices than the Tube Towns? they are more expensive. I have the Hammond 194B choke already.rogb wrote: ↑Tue Apr 23, 2024 6:14 pmWhy not use Hammond Twin transformers from Mouser? No tax shipping or duty to pay and they normally turn up in 3 days from USAdesertmouth90 wrote: ↑Tue Apr 23, 2024 1:31 pm Here is the Dumble ODS 102 Build I have nearly done (Just grounding and Transfomers yet to finish/Order)
I am contemplating going with 100 watt transformers as I can always switch it down to 50 watts and I think ill be ordering the Dumble style OT and PT from Tube Town as I cannot find anything in the UK to go with it.
I will need to plate over the Cap Can opening as im not utilising this bit - I have no idea how to go about doing this bit.
The PCB was used courtesy of AA Electronics (Fantastic quality boards btw).
I have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
What Speakers do other people use? I may have more questions too.
https://www.mouser.co.uk/ProductDetail/ ... sBoQ%3D%3D
https://www.mouser.co.uk/ProductDetail/ ... OQaQ%3D%3D
My Multimeter Doesnt do that, I may need to buy another.martin manning wrote: ↑Tue Apr 23, 2024 1:37 pmYou can do that with a multimeter. See here: https://ampgarage.com/forum/viewtopic.p ... 75#p417375desertmouth90 wrote: ↑Tue Apr 23, 2024 1:31 pmI have also made a huge error of not testing the orientation of any of my Orange Drop Caps so I am trying to buy a second hand Oscilliscope from someone on FB Marketplace (Havent gone to pick it up yet)
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Re: Dumble ODS 102 build
Do you recommend anything cheap?
Re: Dumble ODS 102 build
Most people measuring voltages in these amps use Fluke. You can run into 750v AC on some transformers. So 1000v DC.. Cat II.
I use a USA Wavetek (ex BT), but do a search on here and see what folks use.
Re: Dumble ODS 102 build
I got this one as a compact backup meter, and it quickly became my #1:
https://www.amazon.com/Fluke-101-Multim ... 01IB9S6WK/
https://www.amazon.com/Fluke-101-Multim ... 01IB9S6WK/
I build and repair tube amps. http://amps.monkeymatic.com
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Re: Dumble ODS 102 build
This is a really simple and effective way to find the outer foil of your caps.
https://www.youtube.com/watch?v=1f-LdpJiAk4
No scope or box required.
https://www.youtube.com/watch?v=1f-LdpJiAk4
No scope or box required.
'Beauty is in the ear of the beholder'
- martin manning
- Posts: 13347
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: Dumble ODS 102 build
Sometimes the difference is subtle, so I prefer using a DMM or scope to get a quantitative measurement.Guitarman18 wrote: ↑Wed Apr 24, 2024 6:10 pm This is a really simple and effective way to find the outer foil of your caps.