[R-390] Black beauties and other old capacitors

Mon, 17 Mar 2003 19:43:40 -0000

I would advocate the use of the Vishay Roederstein MKT1813 range of
capacitors when replacing the likes of BBODs and others in the range 4700pF
to 1uF at 400 or 630 v working.

These are available in the UK, Europe and yes...the USA!

Their advantage, in my opinion, over the now famous Orange drops is that
they are of axial construction (Cylindrical with the leads emerging from the
centre of the two ends.)
 They are much easier to fit as replacements for the old axially constructed
BBODs, Vitamin Qs etc as the leads are in the right place with respect to
the capacitor body...you dont need to cram them in as often they are smaller
than the capacitor you are replacing.

Outer foil is clearly marked with a ring. The capacitor is made of Yellow
polyester and is much more in keepink with the colours of the era of our
R39/- series friends.

...And on the subject of DC leakage they pass the VTVM and HT PSU test in
the same manner as the Orange drops...With flying colours!

They perform well as coupling / decoupling capacitors at DC, AF, well into
the RF spectrum. I would NOT use them as a resonating capacitor, though.

Pete
G4GJL

----- Original Message -----
From: "Kenneth Crips" <[email protected]>
To: <[email protected]>; <[email protected]>
Sent: Monday, March 17, 2003 2:40 PM
Subject: Re: [R-390] Black beauties

> With orange drops so cheap there is no reason to use such old junk.
> 'll hang on to them for now.  Should I say on E-Bay they where touched by
> Mr. Macintosh himself, or in the presents of an Western Electric 300.
>
>
>
> Kenneth A. Crips W7ITC, Cheyenne, Wyoming
> Home of Chew Crew II, The Beezie the Beez-Bomb,
> Chic' MOB (mother of Beezie), and Cowboy Joe
> the Cheyenne Chewboy and the pard' of the yard.
>
>
>
>
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