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Re: [Amps] YAESU QUADRA Line Voltage Question

To: "'Leigh Turner'" <>, <>
Subject: Re: [Amps] YAESU QUADRA Line Voltage Question
From: "Ian White" <>
Date: Sun, 15 Jun 2014 08:04:52 +0100
List-post: <">>
Yaesu did not design the power supply in the Quadra. They bought the
complete unit from another manufacturer, and no doubt copied that
manufacturer's specifications.

73 from Ian GM3SEK

>-----Original Message-----
>From: Amps [] On Behalf Of Leigh
>Sent: 15 June 2014 02:35
>Subject: Re: [Amps] YAESU QUADRA Line Voltage Question
>Yes considering the risk of dire consequences for expensive failure and
>repairs it would be wise to take precautions and guard against
>Quadra's narrow rated spec for AC mains input voltage.
>It is actually quite ridiculous that Yaesu would design a product
>for a global market that did not cater for safely handling up to 264
>mains mandated for most modern switch-mode power supplies.
>-----Original Message-----
>From: Amps [] On Behalf Of peter
>Sent: Sunday, 15 June 2014 6:49 AM
>To: Richard Solomon;
>Subject: Re: [Amps] YAESU QUADRA Line Voltage Question
>Interesting question. Most ETSI Standards (applicable in Europe and a
>bit of the Far East) require operation meetings spec for mains voltage
>10%. BUT the standard for commercially available amateur radio
>no requirement.......How that got through, I don't know. Maybe I should
>the Chairman of ETSI ERM TG26, who works for Icom.....
>I'd suggest a bucking transformer.
>Peter G3RZP
> Message Received: Jun 14 2014, 07:37 PM
> From: "Richard Solomon" <>
> To: "" <>
> Cc:
> Subject: [Amps] YAESU QUADRA Line Voltage Question
> Back to thinking about getting a YAESU QUADRA, but the
> Line Voltage problem is bugging me again.
> YAESU puts an Abs Max spec on the Line Voltage at 240 VAC,
> anything over that and nasty things can happen.
> But, our line voltage spec here is 240 VAC +/- 5% and my line
> typically runs over 240 VAC.
> So, the answer seems to be some kind of Buck/Boost Xfmr or
> Line regulator.
> What do folks that own a Quadra do ??
> 73, Dick, W1KSZ
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