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Re: [Amps] Alpha 87A Power Supply Question

To: amps@contesting.com
Subject: Re: [Amps] Alpha 87A Power Supply Question
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Tue, 4 May 2021 14:47:59 -0700
List-post: <mailto:amps@contesting.com>
One very good way to do it is what K4XU did in the Ten Tec Titan 425 (circa 1978-9), whose power xfmr has two windings that are strapped in series for 240V and in parallel for 120V. When strapped for 240V, 120V is obtained from one of the primaries.

Last I looked, it is a code violation for the Green Wire to carry load current. Older appliances did that, but while ancient installs are grandfathered, it has been prohibited for new installations for decades.

73, Jim K9YC

On 5/4/2021 1:54 PM, w5cul@sbcglobal.net wrote:
I think what was being said there is that if an Amp has 110Vac Fans, then
there should be an independent Neutral associated with the Amp as well, to
include L1, L2 and Ground.  I think what was being implied is that the
Neutral to the Amp would NOT be bonded to the Chassis Ground, yet serve
solely as a return for the 110Vac Fans.

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