[Amps] another "new" amp coming?

[Paul Christensen]

Looks like QRO is using a RFC on the filament rather than let 10A of AC 
return current flow on the chassis like the 77Dx design.  It appears that in 
doing so, they tied filament and cathode together like the AL-1500.   Also, 
they're continuing to use the RJ1A/KC1 class of vacuum relay on the RF 
output, but I don't see any mechanical shock-mounting.  RF deck layout is 
well-designed with parts oriented for minimal wiring distances.

QRO seems to be keeping with the Hypersil transformer PS design.  Alpha 
(9500), and now DedicatedRF are using HV toroids.  No experience here with 
the HV toroid design.  Comments pro or con?  I was at a friend's QTH last 
fall where an amp used a HV toroid and was annoyed by the amount of cabinet 
hum it produced under full output power.

Paul, W9AC

----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: <Gudguyham at aol.com>; <amps at contesting.com>
Sent: Friday, August 03, 2012 9:50 AM
Subject: Re: [Amps] another "new" amp coming?


> If Ameritron can do it why not QRO?
>
>
> ----- Original Message ----- 
> From: <Gudguyham at aol.com>
> To: <amps at contesting.com>
> Sent: Friday, August 03, 2012 7:44 AM
> Subject: [Amps] another "new" amp coming?
>
>
>> OK, check it out folks,  QRO TECH's new 8877 amp.  Did I say  new?  Looks
>> like an HF-2500 with an 8877.
>> _QRO Technologies - Ray  Connin KB8VU - HF-3KDX Photos_
>> (http://www.qrotec.com/HF3Kphotos.html)
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