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Re: Plate Blocking Capacitors again


 

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Interesting that he uses one of the ¡®Millen HV connectors¡¯ that are supposedly only rated at 2500VDC to bring his 6500VDC in!

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Mod-U-Lator,

Mike(y)/W3SLK

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From: [email protected] [mailto:[email protected]] On Behalf Of Peter Voelpel
Sent: Monday, January 20, 2020 6:58 PM
To: [email protected]
Subject: Re: [ham-amplifiers] Plate Blocking Capacitors again

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Seems to work

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73

Peter

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From: [email protected] [mailto:[email protected]] On Behalf Of Sharalyn Koeppe
Sent: Sonntag, 19. Januar 2020 23:12
To: [email protected]
Subject: Re: [ham-amplifiers] Plate Blocking Capacitors again

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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:

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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

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(a) 6 amps at 300kHz for 1 hour

(b) 28kV dc

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It also states that the max working conditions should be approx. 80% of those ratings.

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Considering its age has anybody got any thoughts on if it would be safe to use?

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It still measures?1106pf

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Thanks

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Tracey G5VU

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