Group order of switched ladder attenuator? Anyone interested?

[tja]

gjo wrote
FYI,Transcendent Sound has been ofering these kits for a while.

http://transcendentsound.com/step%20attenuator.htm

They are priced at about $80 after a $10 discount that can be got if you register for their newsletter, and Elma rotary switch is used in this attenuator as well.

That's a series configuration, the one Brian's offering is a ladder type.

Take

[gjo]

That's a series configuration, the one Brian's offering is a ladder type.

I stand corrected..

George

[BrianGT]

Originally posted by tja
gjo wrote
FYI,Transcendent Sound has been ofering these kits for a while.

http://transcendentsound.com/step%20attenuator.htm

They are priced at about $80 after a $10 discount that can be got if you register for their newsletter, and Elma rotary switch is used in this attenuator as well.

That's a series configuration, the one Brian's offering is a ladder type.

Take

Exactly. If the series configuration was wanted, it would quite a bit less than $90 for the PCB version that they are selling for $119 - $10.

The switch itself without the pcb on it could be picked up for less than $40 (without resistors or anything else). But just having a 2 deck switch doesn't do you much good.

--
Brian

[roibm]

Great attenuator, I read it everywhere.
But, here's my question: do I need an attenuator to my gainclone?
Do I really need it?
My gaiclone will be driven by a preamp, so I can adjust the volume using it. Is there a problem?

Sorry if the question has been already answered.

[BrianGT]

Originally posted by roibm
Great attenuator, I read it everywhere.
But, here's my question: do I need an attenuator to my gainclone?
Do I really need it?
My gaiclone will be driven by a preamp, so I can adjust the volume using it. Is there a problem?

Sorry if the question has been already answered.

No, if you are using a preamp, you do not need an attenuator, simply use it like a normal amplifier.

--
Brian

[roibm]

Originally posted by BrianGT


No, if you are using a preamp, you do not need an attenuator, simply use it like a normal amplifier.

Brian, you fast man. Do you ever sleep?

So I don't need one... do I need to add a resistor in some place(I read about a reistor that should be added between the input socket and ground)?
If yes, what value? Should I go for the best quality?

Thanks

[BrianGT]

Originally posted by roibm


Brian, you fast man. Do you ever sleep?

So I don't need one... do I need to add a resistor in some place(I read about a reistor that should be added between the input socket and ground)?
If yes, what value? Should I go for the best quality?

Thanks

This resistor that you mention is there by default, R2, which is a 20k or 22k resistor to ground. This is said to work best.

On the picture below, it is the middle resistor. The resistor on the left is the series input resistor, 220ohm, and the one on the right is a 620/680 resistor from the -IN to ground, setting the gain.

As for sleeping, I woke up a little before 6am to work on kits for a few hours before I go to work. Meredith will wake up later and mail them out.

--
Brian

[leadbelly]

Yup, I am very interested in at least one St. Paddy's Day Attenuator!

(I was literally writing down a parts list yesterday to make my own and would have ordered last night if I wasn't on the town enjoying some So it will always be the St. Paddy's Day Attenuator to me!)

[BrianGT]

Originally posted by leadbelly
Yup, I am very interested in at least one St. Paddy's Day Attenuator!

(I was literally writing down a parts list yesterday to make my own and would have ordered last night if I wasn't on the town enjoying some So it will always be the St. Paddy's Day Attenuator to me!)

Sounds good! Put your name on the Wiki:
http://www.diyaudio.com/wiki/index.p...or+Group+Order

--
Brian

[malisz]

Brian,

Is it possible to make this attenuatror in ballanced version too? Quite a few folks could be interested, I believe.

malisz