Daven Attenuator compatibility question

[JMan]

Hi All,

I've got this Daven T 600/600 attenuator that I picked up awhile back, thinking I would eventually find some use for it.  I was imagining using it in something like a BA6A.

Here's my question:

Using the BA6A as an example, the circuit calls for a 600/600 T-type attenuator on the output, with 20 steps of 2 dB.  Now, everything about mine matches this, except that mine is 30 steps of 1 dB.  Is there any reason that this wouldn't work as a substitute?  I recognize that due to the difference in the steps, the response of the control knob would be different, and I would have 10dB less attenuation possible, but given that the impedance and circuit type are the same, could I swap this in instead without causing any huge issues?

 

[ruffrecords]

It should be fine. I cannot imagine anyone would need 40dB of attenuation at an output these days.

Cheers

Ian

 

[JMan]

It should be fine. I cannot imagine anyone would need 40dB of attenuation at an output these days.

Cheers

Ian

Thanks, Ian!  That's what I was hoping to hear!  ;D

 

[emrr]

mine is 30 steps of 1 dB.

You have a more valuable version!  Maybe the one people are desperate to have for UA limiter restorations or 'exact' clones.    Me, I'd stick a cheaper Daven 500 or 600 ladder on a BA-6A.  Automatic 6dB pad and the loading is built in, unlike the T. 

 

[JMan]

You have a more valuable version!  Maybe the one people are desperate to have for UA limiter restorations or 'exact' clones.    Me, I'd stick a cheaper Daven 500 or 600 ladder on a BA-6A.  Automatic 6dB pad and the loading is built in, unlike the T.

Now that's interesting news indeed!

I haven't actually started to build anything yet, so I can certainly plan to use a ladder instead.  Was thinking of doing the Drip version, since I've had that board sitting around for a long time and I haven't done anything with it, and his BOM calls for a T-style attenuator.  I actually am not very familiar with how these attenuator types work/differ from one another, so I was going to just play it safe and go with his recommendation, but I'm always up for learning something new!

I also looked at the BA6A schematic again after posting, and it turns out the input is 20 steps of 2 dB (a dual 25k ladder, from what I can tell), but the output is 20 steps of 1 dB, so the one I've got is still off, just in the other direction from what I initially thought.  ;D

 

[RSRecords]

on the topic of Davens. What's a good lubricant for these?

 

[emrr]

on the topic of Davens. What's a good lubricant for these?

Cailube seems to be fine. 

 

[RSRecords]

Looks like name changed a while back to fader lube. I also found dioxit fader grease https://www.amazon.com/DEOXIT-FADER-GREASE-GRAM-JAR/dp/B0015ABJA4

This the stuff?

 

[emrr]

Looks like name changed a while back to fader lube. I also found dioxit fader grease https://www.amazon.com/DEOXIT-FADER-GREASE-GRAM-JAR/dp/B0015ABJA4

This the stuff?

Yeah that's probably better, that didn't exist last I looked. 

 

[RSRecords]

Yeah that's probably better, that didn't exist last I looked. 

thanks!

hijacking complete...