[NJARC] Grundig Radio Cap Values

[Scott Roberts]

Cool- The less caps to replace, the better! This
Grundig had the most beautiful tone when I bought her-
the past several years she's had an awful buzz develop
when she warms up, so I have left her unplugged to
save her...

Scott

--- Jim Whartenby <antqradio at sbcglobal.net> wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Scott
> nF is 10^-9 Farad just like uF is 10^-6F and pF is
> 10^-12F.  This
> notation is slowly creeping into newer equipment
> schematics, if you can
> find them!  Another interesting descriptor is for
> resistors below 10
> Ohms.  For example 4R7 is 4.7 Ohms.  I translated
> your cap values in
> the original text.  As for Styroflex, I agree with
> Al, no need to
> replace.  If you clean these caps, use alcohol only!
>  Acetone will
> dissolve styrene.  I learned this lesson the hard
> way!
> Regards,
> Jim
> 
> --- Scott Roberts <ng19delta at yahoo.com> wrote:
> 
> > Visit our web site - See http://www.njarc.org
> > _______________________________________________
> > Greetings!
> > 
> > I am considering recapping my early 1960's Grundig
> > Majestic console- it is showing the usual signs of
> > capacitor failure, and so I am hoping to bring her
> > back to her former excellent sound quality.
> However I
> > am somewhat confused at the values. I am used to
> mf &
> > uf, and pf. This radio has values shown in her
> > schematic of nf, uf and pf. What is "nf"? It seems
> the
> > electrolytics are marked in "uf" but a lot of the
> > paper caps are marked in "nf"
> > 
> > Examples form Grundig schematic for the model SO 2
> > U/1:
> > 
> > C-11  22nf  = .022uF or 22,000pF
> > 
> > C-29  47nf  =  .047uF or 47000pF
> > 
> > C-62  2,2 nf  =  .0022uF or 2200pF
> > 
> > C-84  50uf 12/15v (Electrolytic) 12 to 15 volts
> working
> > 
> > I have also identified from the schematic the
> paper
> > caps(papier), the ceramic caps(keramik) but what
> is a
> > "Styroflex" capacitor, and should they be replaced
> as
> > well? I am planning to replace the paper ones and
> the
> > electrolytics, but not the ceramics.
> > 
> > Thanks for any help here,
> > Scott
> > 
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