Remote control kits

[piero7]

Originally Posted by Renron

Piero7,

Yes, I can reach Zero sound output. Mine is on my preamp and not an amplifier per say. As I recall, there are two ways to set up the board, one with zero dB increase and the other way with a small dB increase.
In other words, the module can be a zero gain or a small gain device.
I'm moving my house, so I have no idea where my paperwork is located, sorry.

Ron

Oh, mine too is mounted on a preamp, please, help me to reach zero sound output, just to have a problem less

[Renron]

Piero 7,

OK, I'll look for the manual in my boxes today and try to help you with the settings.

Ron

[piero7]

Cool!!!! thanks!

[Renron]

Piero 7,
Please be patient, I WILL find it and get back to you, but it's gonna be a couple of days. Monday most likely.
Ron

[piero7]

No prob!

[Renron]

Piero7,
Ok, I found the manual, Do you have the RElVol1 or RelVol1C board?
What is the value of your imput resistors? R28 & R29?
What is the input impedance of the linestage (preamp) after the attenuator board?

Changing the R28 &R29 values will change the total amount of attenuation.
I thought it was a jumper, but that was another board I had built.
I remembered wrong. Sorry.

I'm using an Aikido 6sn7 tube preamp with 100K impedance.

Don't forget that when this board turns on it doesn't start at the highest level of attenuation -63 but at -53, a midway point about 1/4volume.

I hope this helps, I can measure my resistors in R28 and R29 if needed.
I have to take my preamp apart to do it. Why I haven't done it yet.

Ron

[piero7]

Yo, mine is the RelVol1C, and I have for r28&r29 111K due my Aikido with E800CC is 1mega drid resistors

Nope, I get no volume zero even changing these two res and the grid resistors from 1M to 100K and adding 11K for r27&r28 Argh!!!

[Renron]

P7,
Good, mine's the RelVol 1 C version too, that will make it easier to help you.
I'm sorry, I must have misunderstood your problem.
Are you saying that you get 0 volume? No sound at all?
Or, your volume won't turn down all the way to 0dB?

We'll figure this out together!
Don't give up!

Ron

[piero7]

Yes, it wont turn down to 0 db

[Renron]

P7,
When you ordered your board from Mikkel, did you order the 10k or 100k resistor package?

Looking at my R27 & R28 I come up with 126M + 100K in series for each of the "Load Resistors".....? That doesn't sound right to me, but it's whats in there. Picture from my board. I don't remember exactly what I did to get those #s but I do know that I had to change them a few times to get the volume to adjust correctly. It has been a while since I built my Aikido.

What is the MU of you preamp? I thought mine was high at ~21MU.

Your tubes are E800CC right? Are they similar to the 12AU7? If so then the expected MU is ~ 17 -18MU.

Don't change the Grid stop resistors in the Aikido! Change the load resistors in the ReVol1C. Try a 100M resistor.

It doesn't sound right but that's what I ended up with.

Ron