SET pre-amplification?

Can you share with us how you converted a SET amp into a preamp? I have a 300B SET amp and want to do the same thing.

Thanks.

To Almarg...Yes I used an old Carver wide band coupler which has prebuilt transformer and resistor step down from high gain to low gain for interconnects. I dont beleive you can find one as nice as this one prebuilt. I bought this one in the early 80,s. If you are like me you are a DIY,er and using Ohm,s Law.

However to be clear I am sure there is a simple way to use a SET for a preamp. The whole original reason for this was I realized that most RCA interconnects used about as much power as my 5 watt 6b4g tube put out. So I am going to try straight wiring my RCA interconnects directly to the neg and pos terminals using the RCA shielding as the neg and the center as the pos. The low power SET amp may not like this due to impedence but there are ways around that as per my last message. I will add a resistor(8 ohm)or(4 ohm) in parrallel and in series to lower voltage and amperage or just one way. This is the easy way to attempt this feat. I am using the volume control on my SET amp as the volume for my stereo now but I could put it after my preamp and still use the SS preamp as volume control.

I can help you with this if you want to try this. A 300B would sound great! The 6b4g is an octal 2A3 so lots of great midrange. I would try using resistors from Mills. You can buy these on line at parts express.BUT I would try to find a device like my Carver coupler. I know car audio stores have high to low adapters for car radios to turn the power out channels in to low level RCA signal levels for amps and being most SET amps are less than 25 watts this shouldnt be a problem. The Carver coupler I am using is the same thing just made specifically for home audio. That should work. If you still have issues I will get exact specs for your amp and help you build one just for it. Let me know if I can help further. Jay

I will part with my Carver coupler for trade or money if anyone is interested. I will post pix of the coupler in my system in tweaks. I think I could build my own in fact I know I can so I am willing to acceppt any reasonable offer.