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Re: [Amps] Ideal bandswitch brand for 3 kW out am?

To: <>, "Harold B. Mandel" <>
Subject: Re: [Amps] Ideal bandswitch brand for 3 kW out am?
From: "Tom W8JI" <>
Date: Fri, 30 Jun 2006 10:17:21 -0400
List-post: <>
Measured voltages breakdown of sample switches:

Centralab JV-9000 series single pole

contact to rotor 8.5kV
contact to contact 6 kV
rotor to shaft 7.5kV

Progressively shorting Centralab:

contact to rotor 9.5kV
contact to contact 7kV
rotor to shaft 4.4kV

RSC Model 80

contact to rotor 8.5 kV
contact to contact 10kV
rotor to shaft 5.5kV

The most troublesome breakdown voltage in an amplifier is 
contact to rotor breakdown. That's always the highest 
voltage on any band. The lowest circuit voltage is rotor to 
shaft. Maximum contact-to-contact is generally around half 
the value of contact-to-rotor voltage.

73 Tom 

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