[ARC5] BC-453 Conversion for 10 meters

[Geoff]

Double conversion as in the NC-300/303 would be ideal since scrapped sets 
and parts are around.

Carl



----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: "Phil Carpenter" <carpenterpa at tds.net>; <arc5 at mailman.qth.net>
Sent: Sunday, November 17, 2013 1:38 PM
Subject: Re: [ARC5] BC-453 Conversion for 10 meters


> On 17 Nov 2013 at 9:24, Phil Carpenter wrote:
>
>> Does anyone know if Stoner ever published a revised Q5-er receiver
>> with full 10 meter capability? The last article I saw was is updated
>> 1959 version published in the New Single Sideband Handbook edition of
>> 1958. I don't have a copy of his 1964 edition, so I'm wondering if his
>> never ending research and experimentation (in the 1959 version article
>> he says he is still working on the 10 meters problem and evolving the
>> circuits) ever paid off in a further revised and updated version
>> published later.
>
> I would be very interested in that also.
>
>> Any help is appreciated as I'm planning a new receiver project using a
>> BC-453 as the base IF as a learning experience and challenge.
>
> As you know, the basic problem with using a BC-453 as the main receiver is
> the low IF, which would make images at frequencies much above about 40
> meters really bad.
>
> He would have had to make some sort of at least double-conversion system,
> if not triple conversion.
>
> I don't know if you are aware of an article (with followups) which was 
> printed
> in QST magazine a long time ago which used a BC-453, a BC-454 and a
> BC-455 to build a triple-conversion "ARC-5" receiving setup for 80 and 40
> meters. If you don't have that, I can get you a copy in PDF format.
>
> In fact, I have two of those complete setups here, both in poor condition.
>
> The articles may give you some ideas, however.
>
> I also have a BC-454 here which I worked on for quite some time, and 
> talked
> about it on this list, which had been converted to cover the 10 meter 
> band. I
> have written the entire adventure up as an article for ER Magazine, and 
> Ray
> will print it within the next few months. It covers 28 to 30 MHz, and even 
> with
> the 12SK7s, has good sensitivity and "good enough" selectivity. It is also
> stable, which surprised me.
>
> vy 73,
>
> Ken W7EKB
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