Add more inputs to vintage preamp? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 18th May 2015, 08:26 PM   #1
diyAudio Member
ChopperCharles's Avatar
Join Date: Jan 2008
Default Add more inputs to vintage preamp?

Has anyone ever replaced the input selector rotary switch on a preamp with a switch that has more positions? I have a Toshiba SY-300 Mk. II preamp, and it only has Tuner/Phono/Aux 3-position rotary switch. I'd like to swap in a 5-position switch, as well as add a switch to defeat the RIAA circuit, as I have a vacuum tube phono stage I'd rather use on that input.

I found a 2-pole 5-position rotary switch on eBay for $8.50 shipped, which is sealed and has a split shaft like the Toshiba amp. Hoping it can be an easy drop-in.


  Reply With Quote
Old 19th May 2015, 12:50 AM   #2
diyAudio Member
Join Date: Nov 2008
Don't do it. Get this: Black 3 Way Port Audio Video AV RCA Switch Selector Box Splitter & 3 RCA Cable Yes it is ugly, but easy. E
  Reply With Quote
Old 19th May 2015, 01:28 AM   #3
rayma is offline rayma  United States
diyAudio Member
Join Date: Apr 2011
Location: Upper midwest
Originally Posted by mickeymoose View Post
Don't do it.
Or you can build your own better quality selector in a box and run the output into the tape monitor input,
bypassing the internal selector switch.
  Reply With Quote
Old 20th May 2015, 12:16 AM   #4
diyAudio Member
ChopperCharles's Avatar
Join Date: Jan 2008
I already built my own selector box for another system, which is why I'm thinking of tackling this. It didn't seem so hard, so why not do it again, inside an inexpensive but decent preamp? (I spent $35 for the preamp off that great yard sale in the cloud (eBay)).
  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
Passive preamp, multiple inputs? neazoi Digital Line Level 4 14th October 2009 07:42 AM
ground bus for inputs on preamp - what's best? cbutterworth Tubes / Valves 9 28th August 2009 04:34 AM
Convert Or Add XLR Inputs To Power Amp? DaveThreshold Solid State 19 29th May 2009 01:41 AM
Phantom Power through my vintage xformer inputs northsiderap Analogue Source 6 4th May 2005 08:16 PM
Adding more inputs for my preamp bonsai171 Solid State 1 11th March 2004 10:59 PM

New To Site? Need Help?

All times are GMT. The time now is 10:45 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2