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 [mailto:amps-bounces@contesting.com] On Behalf Of Leigh
>Turner
>Sent: 15 June 2014 02:35
>To: amps@contesting.com
>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 input....as mandated for most modern switch-mode power supplies.
>
>Leigh
>VK5KLT
>
>-----Original Message-----
>From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of peter
>chadwick
>Sent: Sunday, 15 June 2014 6:49 AM
>To: Richard Solomon; amps@contesting.com
>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.
>
>73
>
>Peter G3RZP
>
>
>========================================
> Message Received: Jun 14 2014, 07:37 PM
> From: "Richard Solomon" <dickw1ksz@gmail.com>
> To: "amps@contesting.com" <amps@contesting.com>
> 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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