[Hallicrafters] Best Rx?

[Richard Knoppow]

----- Original Message ----- 
From: "Robert Nickels" <ranickel at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Monday, November 29, 2010 2:24 PM
Subject: Re: [Hallicrafters] Best Rx?


> On 11/29/2010 3:33 PM, Richard Knoppow wrote:
>> Its possible the receiver was actually announced
>> mid-year and was changed before the end of year catalogue
>> that appears in this book.
> Perhaps, but the discrepancy is that the description of 
> "10 tubes plus
> rectifier" is incorrect if the calibrator is installed, 
> since that
> requires a total of of 13 tubes, not 12.   My guess is 
> this error was
> repeated in all the ad copy and catalogs from the initial 
> announcement
> (page 109, Dec. 1959 QST) forward.
>
> 73, Bob W9RAN

    I looked again. In the 1959 handbook the receiver is 
described as having 10 tubes plus voltage regulator and 
rectifier. In the 1962 edition its described as having 12 
tubes plus regulator and rectifier. Both ads state it has a 
built-in crystal calibrator.
    I compared the tube list. The later ad includes a 6AU6 
calibrator tube which is not listed in the first ad. The 
earlier ad also lists a 6CB6 as the 1650khz IF, this is 
shown as a 6DC6 in the later ad. The later ad also lists a 
6BY6 as a product detector, also not listed in the earlier 
ad. So, the tube count is right but did the earlier version 
actually have both calibrator and product detector? The 
older ad does mention the selectable side band feature which 
suggests it DID have the product detector. But, was the 
change in the 1650khz IF tube real or an error.
    What may have happened was that the adverstising 
department was under the gun to get advertising placed and 
did not have correct information from where it was supposed 
to come from.