>
> 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.
>
John ZS5JF
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