I want to break a signal path which has no discrete components in it as of now. I want a 3 position toggle switch to have the options of Stock (signal pass through), Resistor 1 (signal path broken and routed into Resistor 1), and Resistor 2 (signal path broken and routed into Resistor 2). I've been pondering this, but I think I have figured out how to do it.

Hi there! I have a dbx 386 dual channel tube preamp. It was out of service for some time and when I recently put it back in the rack only a couple of LEDs turn on. On inspection it seems that the larger of the two transformers supplying power to the PCB has transformed into a Gandalf No-Pass Filter ("None shall pass!"), i.e. voltage in to the transformer is good, voltage out is 0.

Hi guys,

Like the title says, I got one of my two LA-610 who doesn't compress anymore.. the action faded over a few months.
I tried to change the tubes and even exchanged the opto cell with the other LA-610 and it did no good.

So I guess a cap or a resistor failed.. I'd need some guidance and some precise schematics

Thanks in advance.

Edited for clarity.

just saw this on the SOS YouTube channel, from AES NY, happening this weekend. Looks really cool!

Boswell

or any of our other resident electronics wizards..

I have this ADK AP1 mic preamp that I love, but it lacks metering. There is nothing there to indicate what my input/output levels are.

hey all, I'm pretty new to this section of RO and at a beginner level as far as understanding of electronics. I've become progressively more interested in the creative sonic options there are available thru electronics modifications and repair.

Hey all - I have a Lindell 503 power chassis. I have been using a Phoenix DRS1R Preamp in the first slot for about 5 months now, no issues. I recently got an A designs P1 as well.

Hi everyone,
I'm not an audio engineer or even sure what one is but I have a problem with a humm. It happens when ever I have some audio device connected to the wall outlet. Let me explain further and see if one of you gurus sees how to fix it or at least track down the problem:

is it possible to change levels between -10 and +4 with transformers?