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

Oscilloscope testing a halogen transformer???

Posted by TomWh on January 4, 2017 at 07:47:05:
OK got a new digital dual channel scope for testing phases in motor controllers for turntables. I am really a newbie in this scope stuff. So I am reading various acticles and the warning of hooking across something and not referenced to ground and the fire, smoke and god only knows what else, got me paranoid.

So if I got this right if say you go to a high power source like say a wall socket thinking you are going to use this like DVM the high voltage/current is going find a ground some where in the scope where it shouldn't and all hell can break loose?

So now the halogen question. I am asumming we are running these floating. Now if the full circuit is in place with a dht I guess you could pick up a ground at the cathode? With a idht you do not have that option.

Also I wanted to test these 60 watt hatch units I got,on the bench, to see what wave looked liked. The fluke 87 with a .6 ohm resistor came in around 10.2 volts at 35k. Is there a way to test these in floating arrangement with out damaging the scope?

Thanks Tom

PS These are nice sealed units but will require a lot of work to get inside. (Aluminum case)