Way back in the OLD days, before World War II, an ECO was an electron coupled oscillator, the then popular circuit for a VFO.

Everybody was putting in ECOs so that they weren't stuck on a few frequencies, depending on how many crystals they had.

73,

Bill Tynan, W3XO

--------------------------------------------------
From: "Robert Costa" <kb6...@yahoo.com>
Sent: Thursday, October 10, 2013 10:46 AM
To: "Ken Alexander" <k.alexan...@rogers.com>; <flexradio@flex-radio.biz>
Subject: Re: [Flexradio] Flex-5000A ECOs?

ECO=Engineering Change Order



On Wednesday, October 9, 2013 12:18 PM, Ken Alexander <k.alexan...@rogers.com> wrote:

And I'd like to know what an ECO is....

73,

Ken Alexander
VE3HLS



On 09/10/2013 2:41 PM, Jordan Arndt wrote:
I'd like to know as well....

73...Jordan VE6ZT

----- Original Message ----- From: "Bill Bordy, NJ1H " <n...@comcast.net>
To: "FlexRadio Reflector" <flexradio@flex-radio.biz>
Sent: Wednesday, October 09, 2013 12:39 PM
Subject: [Flexradio] Flex-5000A ECOs?



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