[Hammarlund] [National] National Select-o-Ject Question

[D C *Mac* Macdonald]

I'm just trying to decide whether to bid on an eBay S-O-J.
I already have a Heathkit AC-powered Q-Mult that I built
many years ago (60s?).

* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* Oklahoma City, OK *
* USAF, Ret (61-81) *
* * * * * * * * * * *
 


----------------------------------------
> From: kgordon2006 at frontier.com
> To: national at mailman.qth.net
> Date: Wed, 23 Feb 2011 11:39:49 -0800
> CC: Hammarlund at mailman.qth.net
> Subject: Re: [National] National Select-o-Ject Question
>
> On 23 Feb 2011 at 13:28, D C *Mac* Macdonald wrote:
>
> > Can anybody provide a comparison of usefulness
> > between the Select-o-Ject and a Heathkit Q-Multiplier?
>
> The biggest difference is that the SOJ works at AUDIO, while the "Q-
> multipler" works at the IF.
>
> They each have different, but valuable, characteristics.
>
> The SOJ is basically a very narrow, adjustable AUDIO filter.
>
> The "Q-Multiplier" can insert both a very narrow peak in the IF passband,
> and a frequency-adjustable "notch" in the IF passband, but not
> simultaneously.
>
> You can, however, use both the SOJ and the "Q-multiplier" simultaneously.
>
> The handbook published home-built versions of both at various times.
>
> I use both.
>
> Ken Gordon W7EKB
> ______________________________________________________________
> National mailing list
> Home: http://mailman.qth.net/mailman/listinfo/national
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:National at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html