[Elecraft] Pileup Mush

[Fred Jensen]

An obscure Novice in SoCal did that ... he had no wallet.  PVC pipe 
hadn't been invented, he used a mailing tube, same tube he made a 
telescope out of with a shaving mirror.  He actually had to study some 
of the simpler math associated with acoustic resonance which was of some 
assistance starting college later in life.

Don't ever think Amateur Radio isn't a great training ground for teenagers.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 3/23/2016 2:52 PM, Ron D'Eau Claire wrote:
> Back in the 50's and 60's there were many articles in the mags of hams
> mounting a headphone in one end of a tube. The length of the tube was cut to
> provide resonance at the desired audio frequency. Such filters actually
> provided pretty sharp responses for CW operation for Hams with slender
> wallets (like mine).
>
> 73, Ron AC7AC
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
> lstavenhagen
> Sent: Wednesday, March 23, 2016 12:33 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Pileup Mush (was:audio board)
>
> Yes, my first RX when I was a child in the 70's was a Realistic from Radio
> Shack. I can't remember the model but it was as wide as the Red Sea,
> especially with the built-in speaker. At one point I got a set of comm
> headphones with a hefty peak in 400hz or so range and it really worked well
> as a "poor man's" audio filter. That was back in the days when novices could
> only use CW so it didn't have to sound good on AM sigs (and it didn't), just
> good on CW tones. It really helped a bunch - I wish I still had them!
>
> 73,
> LS
> W5QD
>
>
>
> --
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