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Re: [Amps] YAESU QUADRA Line Voltage Question

To: <>
Subject: Re: [Amps] YAESU QUADRA Line Voltage Question
From: "Leigh Turner" <>
Date: Sun, 15 Jun 2014 16:46:29 +0930
List-post: <">>
Well Ian that's still a ridiculous situation is it not?

One would hope then that things go bang in the warranty period when the
manufacturer has to wear the consequences of their design folly...


-----Original Message-----
From: Ian White [] 
Sent: Sunday, 15 June 2014 4:35 PM
To: 'Leigh Turner';
Subject: RE: [Amps] YAESU QUADRA Line Voltage Question

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 exceeding
> the Quadra's narrow rated spec for AC mains input voltage.
> It is actually quite ridiculous that Yaesu would design a product
> ostensibly for a global market that did not cater for safely handling up
> to 264 VAC mains mandated for most modern switch-mode power 
> supplies.
> Leigh
>-----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 fair
>bit of the Far East) require operation meetings spec for mains voltage
>+/- 10%. BUT the standard for commercially available amateur radio
>equipment has no requirement.......How that got through, I don't know.
>Maybe I should ask 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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