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Many thanks for that Peter.
At 10kV peak working that capacitor looks to have a much lower rating than mine.
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73s Tracey G5VU
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----- Original Message -----
From: Peter Voelpel <dj7ww@...>
Sent: 20/01/2020 23:57:50
Subject: Re: [ham-amplifiers] Plate Blocking Capacitors again
Seems to work
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73
Peter
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I have understood that mica is not suitable for plate blocking due to dielectric migration from the DC applied.
73,?? Roy??? K6XK
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On 1/19/2020 7:36 AM, Tracey Gardner via Groups.Io wrote:
I have an 1100pf large block shaped Dubilier?mica capacitor?dating from 1944.
It measures approx. 3.75w x 2.25d x 3.25h inches
It states on it that it was tested as follows
(a) 6 amps at 300kHz for 1 hour
It also states that the max working conditions should be approx. 80% of those ratings.
Considering its age has anybody got any thoughts on if it would be safe to use?
