[Hallicrafters] FRG-7

[Carl]

I spent about 8 weeks as a production tech on the WRR-2A before getting a 
transfer to the commercial division Service Dept. An interesting radio but I 
didnt want to be married to it. But I was still stuck with the Wadley as I 
became the lone tech on the HRO-500. All the older techs wanted nothing to 
do with that SS stuff. But first I was drafted into R&D to help on the 
NCL-2000 before they taught me the HRO. National also had a RA-17 in R&D.

The Wadleys here are a RA-17 (UK built version) and a HRO-500.

Carl
KM1H

----- Original Message ----- 
From: "Robert Nickels" <ranickel at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Friday, April 22, 2011 6:43 PM
Subject: Re: [Hallicrafters] FRG-7


> On 4/22/2011 2:18 PM, bonddaleena at aol.com wrote:
>> In defense of the Yaesu, I feel it's an excellent older radio
> I agree Ron.  The beauty of the Wadley Loop is that it's a "drift
> cancellation" mechanism that is very elegant in concept and reliable in
> operation. Wadley loop receivers don't attempt to make the local
> oscillator stable, but eliminate the effect of drift instead, providing
> most of the benefits of a PLL without the phase noise and other
> drawbacks of poor quality PLL synthesizers.   Because they are by
> definition triple-conversion receivers there are some limitations, but
> most have been successfully addressed in the popular commercial designs.
>
> My favorite Wadley loop receivers include the unique Barlow Wadley
> XCR-30 portable,  Racal  RA-17, and the amazing 64-tube WRR-2/FRR-59.
>
> 73, Bob W9RAN
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