diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Solid State (http://www.diyaudio.com/forums/solid-state/)
-   -   Pf 99 (http://www.diyaudio.com/forums/solid-state/100544-pf-99-a.html)

cominup 23rd April 2007 08:39 AM

Pf 99
 
Hi,

On Andrea Ciuffoli's PF site, they said that

"
The input impedance is 47KOhm/1450pF and its resistive value can be adjusted by a pretty wide range, just using a different input resistance.

The input capacitance, 1450pF, seems to be very high. Please note that a gain stage with a 1000 Ohm output resistance gives a > 100 KHz cutoff frequency.

"

Do they have any problem when use PF 99 with 2A3 pre-tube?

Do we have any way to reduce input impedance and capacitance?

Thanks,
CMP.


All times are GMT. The time now is 09:22 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2