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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 9th November 2018, 02:45 AM   #301
Tubelab_com is offline Tubelab_com  United States
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Join Date: Jul 2005
Location: West Virginia panhandle
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do you still have boards left?
At this moment there are 6 boards left. I will get some more when funds permit (soon).


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Hope everything is going okay with you.
I'm fine. Tubelab has barely paid its bills for the last couple of years, so I took on the paid contract job mentioned above to pay the bills and fund some new stuff that could happen next year. This means that tubes will stay cold for a while, and I may not be here as often as usual. There are two or three amps that are partially completed using these boards, and something new that will develop into some new SE and P-P amp designs.......

Meanwhile this prototype sits dark on the bench. It makes 50 WPC on that Antek Toroid, and 80 WPC on a regulated power supply. It will likely be a new Tubalab board next year. There is an SE flavor that is in the early perf board proto stage. So far it only exists in simulation.
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Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
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Old Yesterday, 03:51 PM   #302
Mr_Zenith is offline Mr_Zenith  United States
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Join Date: Aug 2009
Location: KC Metro
Tubelab Universal Driver Board, 2015 version
I'm speaking as a longtime lurker here, but it's good to hear you're okay. Not as many sparks - or as much smoke - rolling out of your shop as in your Florida days, regrettably, but it's gratifying to hear of more good things to come. Hey, we can't be exploding things all the time now right? I'll definitely stay tuned regardless...

Paperweight: I used to live in Asheboro until about six years ago. Before the move I was working on a pair of KT88 monoblocks based on an old Acrosound circuit (itself another incarnation of the Williamson amp), but then my work made me an offer I couldn't refuse. In a way I'm glad it did, as this driver board appears to be a much better front end for this circuit. But it'd have been great to have someone to have a fellow conspirator just a few miles down the road.

And so as not to stray too far off-topic, I'm off to the basement to look for those parts...

Last edited by Mr_Zenith; Yesterday at 03:57 PM. Reason: I forgot the magic smoke...
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Old Yesterday, 08:20 PM   #303
Paperweight is offline Paperweight  United States
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Join Date: Nov 2010
Location: Lexington, NC
I don't get out of the house very often except to go to work. My brother stopped by today and we swung by a model train hobby shop in Spencer. Then we went to Sauers Veneers. If you're into building speakers, guitars, furniture, etc those guys have some amazing stuff. I want to eventually build a set of Jim Holtz and Curt Campbell's Bordeaux speakers. I'm waiting for the cabinet kit to show up on Speaker Hardware.


I ended up buying a set of 60 watt output transformers from Dynakitparts.com and a pair of Classic Tone 40-18069 power transformers. The power transformers can be wired for a good number of B+ configurations and has plenty of current available.
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