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Re: [Amps] QRO 2500DX MARK lll 4CX800

To: "'John Bodine'" <>, "'Amps Amps'" <>
Subject: Re: [Amps] QRO 2500DX MARK lll 4CX800
From: "Peter Voelpel" <>
Date: Thu, 4 Apr 2019 19:32:22 +0200
List-post: <>
What new production run?

DX Engineering says "Equivalent to 4CX800A", a 4CX800A never existed.
And plate dissipation is 600W, not 800W.


-----Original Message-----
From: Amps [] On Behalf Of John Bodine
Sent: Dienstag, 2. April 2019 13:04
To: Amps Amps
Subject: Re: [Amps] QRO 2500DX MARK lll 4CX800

>From personal experience, I would recommend DXengineering for the GU-74b.
These are from a new production run by Svetlana and they work great but YOU
MUST reset the bias when changing tubes or they may not run linear.

On Tue, Apr 2, 2019 at 1:32 AM Steve London <> wrote:

> So, Carl, where would you suggest us cheap, constantly crying, hams get
> new, or
> at least new-old-stock Eimac 4CX800's and 3CX800's ? Lotsa luck.
> 73,
> Steve, N2IC
> On 04/01/2019 09:08 AM, Carl wrote>>
> >> Unlike Eimac, Philips and similar manufactures who design tubes for CCS
> >> service along with plenty of reserve emission to compensate for aging.
> that
> >> tube and most amateur service Chinese are run at the edge.  And cheap
> hams
> >> cry constantly.
> >>
> >> Carl
> _______________________________________________
> Amps mailing list


        John Bodine/WU2E
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