[JN] PP 45 amp

henry platt henryplatt3 at verizon.net
Sat Aug 15 19:39:00 CDT 2009


Hi Ben,
I have a pair  that is All Transformer coupled, all push pull. PP 27  
driving PP 45. Only 20 uf filtering, playing through altec A7's. Good  
iron is the key to success with this format.
-Henry Platt
On Aug 15, 2009, at 7:50 PM, Ben wrote:

> Volt Second wrote:
>>> From my load line spreadsheet, I'd consider 250V at 36mA. It will
>>> be a little more tolerant of speaker impedances dipping below 8
>>> ohms and the higher bias will keep the plate away from where the
>>> curves are bending at low currents.
>> Note: I've seen a 45 with spec'd plate voltage down at 275V.
>
> Anybody out in Joe-land have PP 45 amp running now?
> Ben.
>
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