Re: 3 phase (was LF: G3KEV)

To:	[email protected]
Subject:	Re: 3 phase (was LF: G3KEV)
From:	Andy Talbot <[email protected]>
Date:	Sat, 28 Nov 2015 16:26:54 +0000
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What's wrong with that ?

Sounds an excellent idea for a QRO transmitter. 300Hz ripple - much easier to filter out.

My 137kHz Tx runs from rectified (single phase) mains - the isolation is provided in the ferrite output transformer and FET drive pot-core

A school we once went around with long leads and an AVO identifying sockets to be found on all three of the phases. That was so that, using extension leads, we could bring them all into the lab to get a three phase motor running. Such interesting things could be done in schools in the 1970's

Andy G4JNT

On 28 November 2015 at 15:52, John Rabson <[email protected]> wrote:

In the early days of 73 kHz I believe a Luxembourg station built a transmitter which was powered off full-wave rectified three-phase mains without an isolating transformer. NOT the best way of doing things!

John F5VLF

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LF: G3KEV, DK7FC Re: LF: G3KEV, Mal Hamilton Message not available Message not available Re: LF: G3KEV, DK7FC Re: LF: G3KEV, Mal Hamilton Message not available Re: 3 phase (was LF: G3KEV), Andy Talbot <= Message not available Re: 3 phase (was LF: G3KEV), Andy Talbot Message not available Re: 3 phase (was LF: G3KEV), DK7FC Re: 3 phase (was LF: G3KEV), mal hamilton Re: 3 phase (was LF: G3KEV), Andy Talbot Re: 3 phase (was LF: G3KEV), John Rabson : 3 phase (was LF: G3KEV), Dr. Wolf Ostwald Re: : 3 phase (was LF: G3KEV), John Rabson 3 phase (was LF: G3KEV), Dr. Wolf Ostwald Re: 3 phase (was LF: G3KEV), Mal Hamilton LF: RE: G3KEV, James Cowburn

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