Battery-powered supplies

[mac]

I have never had a problem with channel balance when using a stepped attenuator! You must have very fine steps on your attenuators, or quite a big imbalance! Do you know what is causing the imbalance?

Sorry, I wasn't clear. What I struggled with was the decision to either use a single volume control with an added balance control or just go with dual volume controls. I don't have a balance problem; I just wanted the capability to change it.

The audio taper posts have 45 positions and provide 1db resolution through most of their upper range.

I was advised by Shallco to not adjust the spring tension and took their recommendation at face value. The silver contacts and wipers are rather robust and I assumed that lightening up the tension might effect their make-before-break action.

The largest Kilo knobs that Steve mentioned were just too small to provide adequate torque for the Shallo controls.

[Nuuk]

I think Kilo's ML series knobs are quite nice for an off-the-shelf:

Once again we can only envy you chaps over there Steve. I had a look for a similar UK supplier but haven't found one yet. Instrumentation knobs yes, but sexy ones for hi-fi?

One day, I will get around to moulding my own in casting resin but it's a lot of outlay to make the moulds etc for just a few knobs!

[Steve Eddy]

Originally posted by Nuuk
Once again we can only envy you chaps over there Steve. I had a look for a similar UK supplier but haven't found one yet. Instrumentation knobs yes, but sexy ones for hi-fi?

Nuuk, does the FormMail on Decibel Dungeon go to you? If not, please EMail me at steve@q-audio.com.

Thanks.

se

[fdegrove]

Hi,

The Shallcos are hard to come by in Europe...which leaves us with the Blore Edwards which at first glance seem to offer similar quality.

Re: the torque issue, I find the Elmas great in that respect... for my needs the 23 useable steps are more than ample, I use 3dB steps at the less used positions and 2dB steps at the more popular positions.

To the human ear a 3dB step is clearly audible, anything beneath that is much harder to detect.

Another advantage is that the Elmas take any kind of standard knob.
RS Components in the U.K. carry a range of knobs, nothing all that fancy but nice quality nonetheless.

Cheers,

[Nuuk]

Nuuk, does the FormMail on Decibel Dungeon go to you?

Yes Steve, the FormMail gets to me and I have just recieved your message. I use the FormMail rather than put up an email adress as I get more than enough spam already. I thoroughly recommend FormMail for anyone with a web site.

[Nuuk]

for my needs the 23 useable steps are more than ample,

I agree Frank. I use the 32 position Bloore Edwards switches because I was a ble to buy a couple very cheaply. But I only use about 20 positions and that is more than adequate.

Like I said before, with a change of spring, the action of the B E's is very smooth.

[JCoffey]

So why wouldnt it be possible to modify a UPS to work as a psu?

[protos]

I posted this at the just anothe gainclone thread but it belongs here. The batt ps is the one at the bottom the gc is in the middle and the batt ps detail at bottom pic.

[protos]

Sorry for the pic quality can't seem to find the correct balance between file size and quality.

[Audiofanatic]

Hi Protos,

Are you telling me that your GC is working on batt PS?

Can you shear the schematics with us? (Batt PS)

Best regards,


Audiofanatic