Questions on BB1794 and AD1865 input to Rudolf Broertjes' and Pass D1 output stages - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 14th April 2008, 10:25 PM   #1
Jolojl is offline Jolojl  Sweden
diyAudio Member
Join Date: Aug 2006
Default Questions on BB1794 and AD1865 input to Rudolf Broertjes' and Pass D1 output stages


I have built a Rudolf Broertjes' and Pass D1 output stage to which I would like to connect a BB1794 based DAC (the COD) and a NOS AD1865.

The Broertjes' is up running but will not give more than some distorsion, while I haven't hooked up the D1 (I'm waiting for a transformer).

First question is, can I take the signal straight from the DAC PCB and connect it to the output stages (one at a time of course), or should I use DC blocking caps in between?

Another question I have is that I got the Rudolf Broertjes' stage from DIY Paradise where it is used with TDA1545, and instructions are that the output DC voltage should be about half of the voltage supplied. Is this the same for BB1794 and AD1865?

A third question I have is that I exchanged the 3.3kohm I/V resistor supplied with the Rudolf Broertjes' output stage (which I assumed was for the 1545) for the resistors supplied with the COD (for passive I/V). In the first instance I couldn't get below about 10 VDC on output, while now I am about 3 VDC ... Was this a wrong thing to do?

Sorry for these newbie questions, but that is what I am ...

  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Input/Output Stages for Blackfin DSP maczrool Digital Line Level 7 23rd February 2009 08:10 PM
Eiaj input for AD1865 guglielmope Digital Source 2 29th April 2008 08:18 PM
Cascoded LTP input stages Mindaugas Solid State 20 13th April 2007 01:21 AM
DRV134 Input Resistor & Opamp Output Questions Devil_H@ck Chip Amps 10 16th September 2004 10:24 AM
Input stages - to decouple B+ or not? andyjevans Tubes / Valves 1 9th March 2004 10:28 AM

New To Site? Need Help?

All times are GMT. The time now is 02:50 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2