----------
> From: John Fielding <johnf@futurenet.co.za>
> To: RDTALBERT@aol.com; amps@contesting.com
> Subject: Re: [AMPS] go figure/Murata
To: <amps@contesting.com>
> Date: 01 July 1999 06:26
>
> OK I have now had a chance to peruse my extensive library at work.
>
> From the Murata/Erie catalog 84/85 which detail these caps. The 105A is a
> date/batch
> code marking and has nothing to do with the actual capacitor ratings.
>
> Incidentally some of these caps do have Imperial threads and not metric as
> one would
> expect. Rather obvious when you think of it as they are "duplicates" of the
> original
> Erie parts.
>
> For your info: typesDHSxx series have 8-32 NC-2B threads and the
> remainder have metric
> threads. However the DHS series are not quoted as suitable for RF
> applications, rather
> they are intended for DC PSU filtering/strorage applications.
>
> The RF types are the DCT & DAT series and, for example, the DCT version with
> 1000pf @
> 30kV peak RF voltage and 20KV are rated at 300KVA at 50C and 200KVA at 70C so
> should be
> more than adequate for amateur amplifiers!
>
> Another version is the DC500 series which are a little smaller in size and
> these are
> often used as padders in tank circuits. A 500pf version @ 15kV is rated at
> 14KVA @
1MHz,
> 5.9KVA @ 10MHz and 5.4KVA @ 30MHz. (KVA is approx. equal to KW at lowish
> frequencies)
>
> Hope this sorts out the previous queries.
>
> ----------
> > From: RDTALBERT@aol.com
> > To: amps@contesting.com
> > Subject: Re: [AMPS] go figure/Murata
To: <amps@contesting.com>
> > Date: 01 July 1999 03:26
> >
> >
> >
> > > OK. So what would the characters "105A" mean on a cap?
> >
> > Date code? Other manufacturing code?
> >
> > Murata's spec. sheets do not explain the last number sequence of their
> > "Part
> > Numbering System".
> >
> > See http://murata.com/develop/catalogs/pdf/31-34.pdf
> >
> > 73,
> >
> > Roy K9ER
> >
> > --
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