Tech Square

Technical and speculative discussion of amps, cables and other topics.

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

Odd means of lighting an LED in YBA Integre DT.

Posted by h_h on January 25, 2011 at 13:27:15:
I recently converted my aging YBA Integre DT's volume control to a remote Alps kit purchased off of eBay for the reasonable price of about $40 and am very happy with the results, but in the process, I spent way too much time puzzling over the power LED circuit. That sounds ridiculous until you know how it's powered.

The power switch is a DPDT that disconnects both legs of the power from the IEC C14 connector. When the switch is off, the LED is shorted by the "unused" throw of the DPDT switch.

When the switch is on, the LED has no complete circuit, but it lights! Voltage measurements with a Fluke DVM gave 37 VAC or 30 VDC across the LED when it was lit. I've searched this forum and googled it, and I've found no reference to this weirdness.

I'll leave the answer as an exercise for now.