[ARC5] [Milsurplus] 800cps inverter on Craigslist in Portland

[Peter Gottlieb]

I guess it's just exactly the right tone!


On 11/24/2017 6:39 PM, Scott Johnson wrote:
> I have witnessed first hand, the penetrating scream.  I heard the 800 Hz
> inverter screaming as a PB4Y taxied by me, I was about 100" abreast of the
> aircraft, and could clearly hear it over four running R-2600s.
>
> Scott V. Johnson W7SVJ
> 5111 E. Sharon Dr.
> Scottsdale, AZ 85254-3636
> H (602) 953-5779
> C (480) 550-2358
> scottjohnson1 at cox.net
> scott.johnson at ieee.org
>
> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
> Behalf Of Kenneth G. Gordon
> Sent: Friday, November 24, 2017 2:42 PM
> To: Mark J. Blair <nf6x at nf6x.net>
> Cc: Arc5 at mailman.qth.net
> Subject: Re: [ARC5] [Milsurplus] 800cps inverter on Craigslist in Portland
>
> On 24 Nov 2017 at 13:11, Mark J. Blair wrote:
>
>>> Well, the OUTSIDE sure does, but the "insides" are different from a
> siren.
>> Well, then now I just need to get one of them to power my GP-7
>> project, so I can be properly educated! :)
> Ha ha! :-)
>
> Yup. We had a long discussion on this thing a few years ago. The conclusion
> at that time was that the fan was not the problem. You cannot believe the
> incredible noise out of that thing, i.e., the 800-1.
>
> Mike Hanz has a discussion of it on his website.
>
> Ken W7EKB
>
> ---
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