World-Designs-Forum  

Go Back   World-Designs-Forum > World Designs > WD Amplifiers
Register FAQ Members List Calendar Gallery Today's Posts Search Today's Posts Mark Forums Read

WD Amplifiers For discusson of World Designs Amplifiers

Reply
 
Thread Tools Display Modes
  #1  
Old 20th September 2019, 05:54 PM
G Willis G Willis is offline
Junior Member
 
Join Date: Mar 2017
Location: UK
Posts: 23
Default CF - mounting by-pass switch

Hi All,

I am going to build the WD CF as a nice little autumn project. I would like to mount a switch for my DAC which would by-pass the amplification and volume pot completely.

Has anyone done this with the standard casework and what did they use? I guess it would have to be on the rear panel which is ok.

Regards, Graham
Reply With Quote
  #2  
Old 21st September 2019, 02:43 PM
Phil Y's Avatar
Phil Y Phil Y is offline
Senior Member
 
Join Date: Jul 2006
Location: Bristol, UK
Posts: 717
Default Re: CF - mounting by-pass switch

Hello Graham,

I've not thought it through fully but you might be able to fit a double pole changeover relay at the input, that bypasses the active stage. If this was powered by the heaters, switching the pre off could release the relay, bypassing the active circuit and giving you your "straight through" option.
Obviously, you would need to fit a power switch on the Pre. Not sure if "unloading" the psu in this way would cause any problems with the HT voltage for the Phono, perhaps others could comment?

Phil.
__________________
Commission for Dark Skies (CfDS)
Reply With Quote
  #3  
Old 21st September 2019, 07:19 PM
G Willis G Willis is offline
Junior Member
 
Join Date: Mar 2017
Location: UK
Posts: 23
Default Re: CF - mounting by-pass switch

Thanks Phil - but I think I may have overlooked a blindingly obvious and simple solution, and that is just to ask Mathew to send me a new face plate, rotary selector and single pair of RCA inputs for my KT-88 power amp.
Reply With Quote
  #4  
Old 22nd September 2019, 11:55 AM
Phil Y's Avatar
Phil Y Phil Y is offline
Senior Member
 
Join Date: Jul 2006
Location: Bristol, UK
Posts: 717
Default Re: CF - mounting by-pass switch

Ah yes, simple ideas are the best. That makes more sense.

Phil.
__________________
Commission for Dark Skies (CfDS)
Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump


All times are GMT +1. The time now is 11:37 AM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright World Designs