Goldpoint SA4M-47 passive 'preamp' winging its way to Marco Towers...

:D

Hopefully Marco can bring his LDR over to mine for listen on Sunday. :)
Guv'nor?

Only if you lick my cadmium-coated lollipop, big boy! :eyebrows:

Marco.

P.S Will reply to your PM shortly.

Quote:

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Originally Posted by Gazjam

Hopefully Marco can bring his LDR over to mine for listen on Sunday. :)
Guv'nor?

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It should lead him up the path of least resistance:)

You got the lower capacitance cables yet?

Yup! All sorts of things to be reported on, muchacho, but I'm up in Scotland at the moment, visiting friends, and soon will be over in France [unlikes others 'elsewhere', I have a life], so don't expect any major contributions here from me until around the beginning of November :)

Marco.

Quote:

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Originally Posted by Firebottle

Hi Josie, I'll give it a shot at a laymans explanation.

A basic attenuator is a series resistance and a shunt resistance. A standard potentiometer in effect combines both with the wiper terminal dictating the resistance split between series and shunt.
As the series resistance decreases the shunt resistance increases, this ups the volume.

An LDR is a Light Dependant Resistor. The resistance varies due to the amount of light energy inside the LDR. Cleverly the light element, normally a LED, is completely isolated electrically from the resistance part. This means that when the resistance is in an audio circuit there is absolutely no degradation of the signal passing through the resistance.

To form an LDR passive two are used and arranged so that as one reduces in value the other increases in value, with a common control voltage.
This is the same as a series/shunt attenuator, hence a passive control.

Hope this is clear,

:)

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Hi Alan... sorry about the delay. Many thanks for the explanation. It does make sense, a bit... lol but enough I think. Thanks for taking the time to do that.

Jo:)

Apologies, chaps, for the delay in bringing this thread to a proper conclusion, but I've been away on holiday abroad, and then had friends visiting when I returned [contrary to the lonely and unfulfilled existence of some sad inadequates 'elsewhere', I do have a life outside of participating on forums ;)], so not had much time recently for contributing.

Anyway, full review of the NVA SSC/Belden/MC5000 interconnects, in conjunction with the Goldpoint, in due course, not to mention further conclusions on the LDR, and also how the Croft shaped up to the 'passive whippersnappers' when plumbed back into the system, once I've caught up with some stuff! :cool:

Marco.

I've been away on holiday abroad,

Thats why its been nice and quiet recently :)

Hope you enjoyed your time away ;)

Lol - glad you missed me! :eyebrows:

We did indeed enjoy our time away in France. Brought back a shed-load of wine and goodies for Christmas (how many days away is it now? :D), so can't wait to get stuck into it all and share it with family and friends over the festive period! :cool:

Marco.