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EL34 Baby Huey Amplifier
EL34 Baby Huey Amplifier
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Old 18th September 2019, 04:28 AM   #591
gingertube is offline gingertube  Australia
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Join Date: Oct 2004
Location: Adelaide South Oz
No - It just improves filtering (reduces -ve supply ripple) without the need for huge caps.

Note also that the Mosfet source followers which drive the output tube grids have current source loads. Those current sources have huge AC impedance and the source followers have very small AC impedance looking into the source pin. These form a voltage divider for any residual -ve supply noise/ripple and that will be divided down to next nothing anyway.
So maybe an "overkill" but we don't mind "overkill" when it comes to power supply noise elimination.

Cheers,
Ian
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Old 18th September 2019, 08:47 PM   #592
gbowling is offline gbowling  United States
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Join Date: Jun 2008
Location: Michigan
Any opinions here on the best KT88 for the Baby Huey?

I know there are quite a few people here who are using Kt88s. I'm rounding up parts for starting my build and the only piece I have remaining are the Kt88 tubes.

Thanks, gabo
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Old 19th September 2019, 06:55 AM   #593
lordoff is offline lordoff  Bulgaria
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Join Date: Oct 2006
Location: Sofia
Quote:
Originally Posted by gbowling View Post
Any opinions here on the best KT88 for the Baby Huey? ...
Hi gabo,
I'm in same situation like you. Just starting to collect parts and waiting for new PCBs from prasi.
But... I already have 2 matched pairs new KT88 Gold Lion :-) Will see how performs...
Opinion are welcome too...

Last edited by lordoff; 19th September 2019 at 06:59 AM.
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