[ARC5] BC453 FET BFO Success!!!

[Bob kb8tq]

Hi

Keep in mind - “back in the day” CW was the long range communications 
approach. A radio that could not stay “on net” for CW communications wasn’t
gong to do the job. That’s not in the nice stable conditions in your basement. 
That’s in a bomber doing it’s thing in combat. The “radio guy” had plenty to do
well beyond tweaking this or that radio ever few minutes …..

Bob

> On Dec 18, 2017, at 6:30 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
> 
> On 18 Dec 2017 at 22:17, J Mcvey wrote:
> 
>> 
>> I'm not the only one with this situation on a boat anchor.
>> take a look at 4:34 on this video  
>> https://www.youtube.com/watch?v=vZ37HmgJQkw
> 
> That is an interesting video for several reasons. 
> 
> The first, as far as I'm concerned, is the really terrible instability of his NC-173 !!! 
> 
> Although I have not used an NC-173, I have used other National receivers, and even a 
> simple one like the NC-57 is FAR more stable than his NC-173!.
> 
> I am wondering if he restored that radio or if he simply fired it up after finding it somewhere?
> 
> Unfortunately, he has not implemented any way to leave him a comment on those youtube 
> videos, nor to contact him via e-mail.
> 
> The only receivers I have ever used with such terrible instability were Hallicrafters, including 
> the SX-101. Even the SX-28 was MUCH more stable than either his NC-173 or the other 
> Halli receivers I've used.
> 
> Tapping on the table resulting in such instability indicates to me, at least, that there is some 
> sort of mechanical or electrical problem in that radio which has not been addressed. Such 
> terrible instability should NOT, EVER happen in any decent receiver.
> 
> NONE of my working "ARC-5" receivers exhibits such instability. I would never attempt to 
> use any receiver that did.
> 
> Here is a test for you: tune in a weak signal, then pick the receiver up, raise it about 2 feet 
> above your operating bench, and drop it.
> 
> If the tone of the signal being tuned-in moves even 1 Hz, then the receiver is 
> MECHANICALLY unstable.
> 
> Gee...
> 
> Ken W7EKB
> 
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