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Old 20th April 2014, 10:18 PM   #71
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I'm looking at renewing the caps and Falcon are asking for a tolerance to be selected ?

ClarityCap Capacitor ESA 250 V 3.00uF, Free UK Delivery, superb combination of price & value.
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Old 20th April 2014, 10:32 PM   #72
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by Barbieboy View Post
Has anyone got any info / specs on these speakers,
old reviews, brochure ? All I know is that they are 8ohms !
Hi,

Rave reviews at the time for the quality, but at the price
the vinyl finish was a major downer, they didn't sell well.

The TPX bassmid I think suffered from the lack of
extremely consistent supply and needed to be
precise way beyond its other typical uses.

(Which is laboratory stuff and stiff wine / beer glasses.)

Peerless experimented with a TPX/Poly combination.

rgds, sreten.

FWIW the original MC2's and MC4's were designed
by Martin Colloms, and both with the loads of foam
stuffing, indicate drivers out of the original spec.

Both were replaced by inferior designs very shortly.
Driver consistency I suspect was the major issue.

Still I like my MC2's a lot.
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Last edited by sreten; 20th April 2014 at 10:40 PM.
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Old 20th April 2014, 10:39 PM   #73
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and expensive, when I bought mine in '87 that was six weeks wages...

The front baffle is vinyl, but the sides are wood veneer I think you will find
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Old 20th April 2014, 10:43 PM   #74
system7 is offline system7  United Kingdom
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When designing crossovers, I'd never worry about getting nearer than 10% even with a notch. That's why you go for the nearest preferred value. Resonant frequency of an LC circuit is the root of 1/LC.

So 10% change in value produces a 5% change in frequency. I don't suppose film types vary much.

Preferred values are stuff like 2.2uF, 2.7uF, 3.3uF, 3.9uF, 4.7Uf, 5.6uf, 6.8uf, 8.2uF, 10uF, 12uF, 15uF, 18uF, 22uF. Falcon and Wilmslow have that.

I wouldn't have use for anything closer. Same for coils and resistors. With resistors, I just get biggish 10W wirewound types because they work for everything.

A rougher range like Maplin's, frequently stocked is 2.2uF, 3.3uF, 4.7uF, 6.8uF, 10uF, 15uF, 22uF. That can be problematic.

Occasionally you encounter 10uF, 12uF, 16uF, 20uF and so on.

The price hikes with 250V, 400V, 630V and 1000V. But curiously, I find smaller cheaper 250V types have some advantages with build size and a theoretical smaller common-mode crosstalk and interference, and are my current weapon of choice.
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Well, there it is! Best regards from Steve in Portsmouth, UK.

Last edited by system7; 20th April 2014 at 10:50 PM.
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Old 20th April 2014, 10:48 PM   #75
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by Barbieboy View Post

The front baffle is vinyl, but the sides are wood veneer I think you will find
Hi,

Short answer is simply no, they are all vinyl,
if you have a pair that should be obvious.

rgds, sreten.
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When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 20th April 2014 at 10:53 PM.
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Old 20th April 2014, 10:52 PM   #76
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The ones in the MC4s are 3.0uF and 6.0uF @160VDC, so these Claritycaps @250V should do the trick
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Old 20th April 2014, 10:55 PM   #77
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Quote:
Originally Posted by sreten View Post
Hi,

Short answer is simply no, they are all vinyl.

rgds, sreten.
I'm leaving the cabinet work until last, so will let you know ! But the inside of the cabinets are veneered, odd to cover that with vinyl on the exterior. The MC5s were definitely vinyl and highly criticized for that too
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Old 20th April 2014, 11:02 PM   #78
system7 is offline system7  United Kingdom
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Quote:
Originally Posted by Barbieboy View Post
The ones in the MC4s are 3.0uF and 6.0uF @160VDC, so these Claritycaps @250V should do the trick
3.3uF and 5.6uF would be an imperceptable change. I'd do that if it saved money.
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Old 20th April 2014, 11:48 PM   #79
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by Barbieboy View Post
But the inside of the cabinets are veneered,
Hi,.

Well they won't be the mk1 versions of the MC2's or MC4's.
Your right in that veneered cabs have an internal veneer.
(Most veneered cabinets use balanced stock at the time.)

rgds, sreten.

the mk2 versions of the MC2 and MC4 are very different
speakers, and nowhere near as good IMHO, YMMV.
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Last edited by sreten; 21st April 2014 at 12:05 AM.
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Old 21st April 2014, 08:32 AM   #80
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Quote:
Originally Posted by system7 View Post
3.3uF and 5.6uF would be an imperceptable change. I'd do that if it saved money.
Can't see the point of changing the values just to save pennies. Got other things to explore like speaker cables and changing the power valves on my amp
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