Switching the dual voltage PT taps
Moderator: VelvetGeorge
- mightymike
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Thanks for sharing this George.
I put a pot on my switch instead of the resistor.
Works like a charm.
Here some pics
http://kymer1.home.comcast.net/images/dualtap.jpg
http://kymer1.home.comcast.net/images/dualtapswitch.jpg
http://kymer1.home.comcast.net/images/m ... p12000.jpg
Now all I need is 3 labels (435v, off, and 480v) to stick on the front.
I put a pot on my switch instead of the resistor.
Works like a charm.
Here some pics
http://kymer1.home.comcast.net/images/dualtap.jpg
http://kymer1.home.comcast.net/images/dualtapswitch.jpg
http://kymer1.home.comcast.net/images/m ... p12000.jpg
Now all I need is 3 labels (435v, off, and 480v) to stick on the front.
- antosimoni
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No doubt! You know what's really cool about this? George thinks bigger. He's not trying to build (and protect) a $40/hr bench services business. I think he's building something a lot bigger, broader and more substantial. He's not trying to build a brand or mystique around one particular mod. He's creating an environment within which regular folks are building some pretty amazing amps, and at great prices too. When George does research and product development, thousands of people benefit - not just the chosen few. And the amazing talented folks here reciprocate, and it gets even cooler. So when I buy this stuff, I buy from him, and so do a lot of you.wdelaney72 wrote:But George, according to the Caswell, Bray, and Assclown business model, you are supposed to keep this a big secret.
To me, it once again proves we're hanging in the right place, with the right guy!
- mightymike
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- antosimoni
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- mightymike
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Bingo..that's what I was thinking the benifit of it would be. I figure if sell this amp, the new owner only needs to know that there are 2 bias pots one for each range, and this way he doesn't have to learn how to change the resistor if he changes to output tubes that are different enough that they would warrant a bias range resistor change in a stock amp.wdelaney72 wrote:How often does the resistor value swing away from 22K? Will it be different with every set of tubes?
If that's the case, I'm liking the 25K pot.
Or maybe it tracks with all tubes once you have the switched dual tap range resister set? Maybe someone with George's dual tap that has tried a bunch of different tubes can answer this.
Also with a pot you really dial it in exactly to where you want down to the .1mA.
No Problem....Just giving back..thanx MIGHTYMIKE !!!
Thanks to George..
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- mightymike
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If you're using a 2nd pot, you could add a turret right next to the 27k turrent where the white bias wire comes in. In the unused perf hole between that tuuret and "B". and mount the pot or resistor across there, and put the white wire to the added turret.
It would look nicer than the pot on the switch.
It would look nicer than the pot on the switch.
- antosimoni
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