Re: Need favorite 12B4 for Guinevere line stage recommendations?

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Posted by Norris Wilson [ 4.244.171.239 ] on November 30, 2005 at 22:06:46:

In Reply to: Re: Need favorite 12B4 for Guinevere line stage recommendations? posted by Damir on November 30, 2005 at 06:50:15:

Thanks Damir for the 12B4 information.

I have been trying to track down some of the DN2540N5 depletion mode transistors, but have been stiking out.
I have found a few larger electronic firms such as Mouser, that will be happy to sell me 50 at a time.
None of the firms where I have looked, stock this model of transistor.
I am not sure I would need 50 of these.
Does anyone have a decent supplier where I can buy a smaller lot of 10 or less of the DN2540N5 transistors?

Douglas did mention a TO-92 variant that would work, DN3545N3.
But, I would rather have the TO-22 that appears to be a little more robust and has more heat sink realestate.

Also, I would love to hear about others experiences in building a power supply for the Guinevere?

I am under the impression that the 12B4 has a slight problem of being susceptible to noise from the power supply. At least this is what I have read on a few other forums, or believe this is what they meant. Does the CCS reduce this susceptability to noise?

Thanks

Norris Wilson

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