Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.
You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.

You must login to use this feature.

Inmate Login

By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username: The Name that you picked or by default, your email. Forgot Moniker?	Examples "Rapper", "Bob W", "joe@aol.com".
Password:	Forgot Password?
	Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:
Your Email:
Subject:

Message Comments

Original Message

RE: update 2

Posted by vinnie2 on February 19, 2019 at 07:00:18:
Yes, I was using an 8 ohm resistor across the opt output leads, and no the resistor does not get warm, and yes I realize that voltage is way too high.
However;
I went ahead and tried your test and got a 0.12 volts reading with the dvm on the signal generator output and 0.13 volts using the scope. I was very careful to follow the directions in the scope manual for measuring voltages. That seems like a pretty good match to me. HOWEVER, when I switched over to the amplifier everything went gunny sack. I did not change any of the settings, but I had to go clear up to 50 volts/division to get a sine wave that would stay within the screen of the scope, and that was with only 1/3 volume on the amp. I think the scope is working ok because it read the signal generator ok. I do not have a clue why the voltage is so high when I switch to the amp. I follow the instructions in the scope manual again, but obviously something is wrong somewhere. The final thing is the amp doesn't play any loader than my SET 2A3, so I know the voltage has to be wrong. I am just going to build the other channel for now and forget about trying to figure the watts unless someone has a eureka moment from reading these posts. Maybe deaf by khorns can add something if he checks back in. Thanks for the effort.