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Old 18th May 2015, 08:26 PM   #1
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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.

Thoughts?

Charles.
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Old 19th May 2015, 12:50 AM   #2
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Don't do it. Get this: Black 3 Way Port Audio Video AV RCA Switch Selector Box Splitter & 3 RCA Cable Sale-Banggood.com. Yes it is ugly, but easy. E
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Old 19th May 2015, 01:28 AM   #3
rayma is offline rayma  United States
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Quote:
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.
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Old 20th May 2015, 12:16 AM   #4
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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)).
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