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Old 3rd September 2017, 11:03 AM
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pre65 pre65 is offline
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Default Buffered volume control.

I've been having "issues" with my two best preamps, and my back up valve pre is not really good enough for the main system.

I was going to try a passive pre, but having read of their pitfalls, and not having time to DIY a passive with a buffer I looked to Ebay.

I purchased a simple device from a Chinese supplier, a 12v 2 valve buffer with volume control and it was 19:99 inc postage. It came this morning, and I'm using it now. Out of the box it sounds good, and when it's run in I might rig up a better 12v supply than the standard wall wart.

It says the two valves are 6J1, so there might be mileage in getting better quality items, but it will do for now.

http://www.ebay.co.uk/itm/NEW-DC12V-...53.m2749.l2649

UPDATE.

For 20 this is absolutely brilliant.

Now thinking of building a Pass B1, or the direct coupled version.
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Last edited by pre65; 3rd September 2017 at 05:08 PM.
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Old 3rd September 2017, 01:12 PM
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Phil Y Phil Y is offline
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Default Re: Buffered volume control.

Philip,

Your link does not appear to work, just a list of random stuff.

Phil.
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Old 3rd September 2017, 05:09 PM
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pre65 pre65 is offline
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Default Re: Buffered volume control.

Sorry about that, I've replaced the link with one that works.

Here it is again.

http://www.ebay.co.uk/itm/NEW-DC12V-...53.m2749.l2649
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Old 4th September 2017, 08:19 AM
bob orbell bob orbell is offline
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Default Re: Buffered volume control.

It would be interesting to use a car battery Philip, with the correct size fuse of course, this will be pure DC. BOB
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