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Re: [Amps] YAESU QUADRA Line Voltage Question

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Subject: Re: [Amps] YAESU QUADRA Line Voltage Question
From: "Leigh Turner" <>
Date: Sun, 15 Jun 2014 11:05:20 +0930
List-post: <">>
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.


-----Original Message-----
From: Amps [] On Behalf Of peter chadwick
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: "" <>
 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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