So Im looking to reduce the gain of my tseii thats running 300b tubes. The amp sounds geat and super quiet if Im running it without my preamp but requires me to turn the source volumes down significantly. Once I add the preamp into the system, I am getting quite a bit of noise since my tse is running at full gain without a pot. Im not really looking to cut more holes in my chassis and dont have much of a need for an adjustable pot on the amp. Im hoping to be able to install a few resistors in the incoming signal to reduce the overall noise of my system when running my preamp. I know i need to create some sort of volage divider with resistors but the actual implementation and values is beyond my knowledge level at the point. Thanks in advance for any help!
Bryce
Bryce
Wire an appropriate pot inline with the amp's input and adjust it to your taste by testing source signals.
Once you find the comfortable level, then measure each resistance from the wiper to either end of the pot, and install resistors of similar value inside the preamp's output.
Easy stuff.
Once you find the comfortable level, then measure each resistance from the wiper to either end of the pot, and install resistors of similar value inside the preamp's output.
Easy stuff.
Thats strange. I run mine wide open through an OddWatt Forewatt Preamp into some pretty sensitive speakers (93 db/wt) and get zero noise. In fact, I wasnt planning on running things this way until I tried it and have never looked back.
On the SSE I built I was getting a fair amount of noise until I used shielded, twisted pair for input jacks and grounded the shields. I did the same on TSEII without even thinking so might be another noise source causing issues?
On the SSE I built I was getting a fair amount of noise until I used shielded, twisted pair for input jacks and grounded the shields. I did the same on TSEII without even thinking so might be another noise source causing issues?
the tse is super quiet on its own if i feed it directly from my dac and thats into 99db sensitive speakers. Its more an issue of my pre (vta sp14) being too noisy feeding a signal into the tse running at full gain. Im thinking attentuating the signal slightly will help because my other amp vta st-120 is noisy if running at full volume but turning it down a few clicks is enough to push the noise below the audible level.
Without any specific information (schematics) about your equipment, I cannot speculate.
While the internet is a wonderful thing, it cannot enlighten others without the proper information.
so its a vta sp14 preamp. its designed off on an aikido circuit and runs two pairs of 6sn7 tubes with the second being a cathode follower. Output is coupled through .22uf caps. Output impedence is supposedly around 600ohm. That is about the extent of the imformation I have available. Still figuring this stuff out.
An audio voltage divider is usually called an L pad. Just Google up an L pad calculator, put in your desired attenuation, and the impedance, and it will spit out the values.