Input votage various rf sources - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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
Reply
 
Thread Tools Search this Thread
Old 23rd June 2007, 08:03 AM   #1
peterlo is offline peterlo  Australia
diyAudio Member
 
Join Date: Jun 2007
Default Input votage various rf sources

Hi,
Again I find myself asking a newbie type question.
I recently aquired (very cheaply) a Rotel inegrated tuner/amp.
It's a silver metal fronted old design, pre-dating CD's it appears because I see only phono & tape inputs on the rear.
Seems a pity to be able to use only with the tuner (doubt the overall quality worthy of feeding my vinyl collection).
Is there a simple way to allow this unit to accept rf input from a CD player.
Yes or No I'd much appreciate a brief explanation.
Pete
  Reply With Quote
Old 23rd June 2007, 11:21 AM   #2
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
Any conventional CD player has an analog output that should be fine. Plug it into the AUX input (or tuner or tape) and go to town.
  Reply With Quote
Old 24th June 2007, 09:03 AM   #3
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
your CD player will have a pair of analogue audio out. It may have a wired digital out and/or an optical digital out.
Ignore the digital outs if fitted (Well almost, you can fit a 75r dummy load to the wired digital out).
Connect the analogue outs to either aux or tape input. The Rotel should be able to play from either of these.

If the phono is really bad or broken then you could short from input RCAs to the selector switch and give yourself an extra input. But test it first, it might play OK from phono.

If you have a piece of gear that accepts digital signals then your CD digital signal could be sent to it direct.
__________________
regards Andrew T.
  Reply With Quote
Old 25th June 2007, 06:22 AM   #4
peterlo is offline peterlo  Australia
diyAudio Member
 
Join Date: Jun 2007
Default CD Player - analog outs

Thanks for the helpful comment.
I have several CD players, most are more than 5 years old & some may be 10; they were all of only modest quality when new.
The outputs are not marked Digital or Analog.
May I safely assume that in such cases the outputs are Analog?
In which case I will plug into the Rotel "Tape Inputs".
I am a little lost about the comment by Andrew about the phono inputs.
I had always understood phone from mm or cartridge sources operated at substantially different voltages to "Aux & Tape".
So unless I use a 75 Ohm load (as suggested) surely the volume would be well away from optimum?
BTW I happen also to have the "Marantz CD door drive problem" - where the 10 tooth drive pinion disintegrates. Can't believe how weak the plastic has become - not much better thab stiff cheese. Have emailed Philips asking for help but not holding my breath. Any ideas - other than operating the door manually which is what I do now.
Thanks
Pete
  Reply With Quote
Old 25th June 2007, 11:08 AM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Default Re: CD Player - analog outs

Quote:
Originally posted by peterlo
................ I will plug into the Rotel "Tape Inputs".
I am a little lost about the comment by Andrew about the phono inputs.
if the phono is broken then rather than waste a pair of inputs I am suggesting that you could bypass the RIAA stage and take a connection from the RCAs direct to the selector switch. This will convert the phono input to a line input.
Quote:
Originally posted by peterlo

I had always understood phone from mm or cartridge sources operated at substantially different voltages to "Aux & Tape".
The phono input (from a record deck) will have a much more sensitive circuit to amplify the lower signals that come from the phono cartridge. The phono input also have a RIAA equalisation to mirror image the equalisation built into the recording.
Quote:
Originally posted by peterlo


So unless I use a 75 Ohm load (as suggested) surely the volume would be well away from optimum?
The 75r dummy load is there to terminate the digtal output rather than leave it open circuit. The analoque outputs from the CD player will get fed into the tuner/amp and then come out as speaker voltages.
__________________
regards Andrew T.
  Reply With Quote

Reply


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
high votage output stage latala Solid State 31 4th May 2006 12:18 PM
Current Sources vinay Pass Labs 1 19th March 2005 04:23 AM
Sources of hum. JoeBob Solid State 30 19th July 2002 04:23 PM
TDA1541A S1 & S2 sources? mozfet Digital Source 12 23rd June 2002 09:17 PM
Can capacitors with different values and different votage Tony D. Solid State 5 5th October 2001 04:51 AM


New To Site? Need Help?

All times are GMT. The time now is 01:12 AM.


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