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|15th June 2004, 03:23 PM||#1|
Join Date: Apr 2003
Burr Brown PGA2310 based Preamplifier for sale
it's total sellout in my living room ...
Still my TDA7293 100W-Chipamps are for sale;
apart from that a preamplifier, in signal path is only burr brown PGA2310 and two 75R non-inductive vishay-dale cmf-55-143 resistors.
I will add another two PGA2310 for those who want to make a multichannel pre out of it.
The whole amp is based on the volume control and nt-v kits from www.ub-audio.com.
There is a delay circuit which shortens the output for some seconds when the pre is switched on and shortens the output immediately when the amp is switched off, so there are no bad noises.
The amp is dc-ccoupled, which means no blocking cap at all.
power supply: torodial transformer for analog part, smaller ordinary transformer for digital part; The analogue part has discrete series regulaton using STM BC909 and TL431CLP followed by shunt regulators (again TL431CLP).
All P/S caps are Panasonic FC as well as Vishay Roederstein MKP and EMZ KP caps parallel.
The PGA is controlled by an Atmel uCom; volume is set by rotary button, balance and mute by push-buttons. Input and power are rotary switches.
There is a remote control included which only works for volume control and muting.
The display is a blue one.
The case is 2mm aluminium neither laquered nor anodized (should be done some time.) The front is 10mm aluminium.
All four input and the outputs pair are gold-plated RCA jacks.
for more information please ask here or email me.
I prefer payment via international bank transfer (EU) or if not possible paypal. Shipping in EU is included, outside depends.
I ask for 200 Euros which is just the material cost.
enough pictures I think ...
Visit my DIY page at www.krishu.de
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