[GreenKeys] GKN QSOs

[Steve Garrison]

Hope you hear us Tony!  Let us know who you do hear.

Steve G./N4TTY

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of tony.podrasky
Sent: Friday, December 21, 2018 7:01 PM
To: harold at w6iwi.org; greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] GKN QSOs

GA OMs;

I got on RTTY in 1968 via Air Force Mars.

I build a W2PAT T.U. from the ARRL Handbook. It was easy to build and worked
fairly well with the TV bandwidth coils (as I recall).

We were running FSK in those days and did it by yanking on the VFO by
grounding a capacitor connected to it.

I had the Drake "B" twins.

In the evening a bunch of us got together on 15 Meters when the band was
closed. I got about 15 people involved in RTTY and we had our own net.

Now, I'm in San Diego, Ca - in Escondido - and in a Condo.
I can't hear anything on any band even with a 40' vertical.

I mostly print weather information and ITTY.

I'm going to try to get on in the mid afternoon during GKN and see if I can
at least hear some of you if not join in.

UE,
K2EAA - TONY
NNNN
ZCZC


On 12/21/2018 02:54 PM, Harold Hallikainen wrote:
> Great reading all this stuff! I don't have any RTTY hardware right now 
> (did 50 years ago), so I'll just listen on the KiwiSDR at 
> http://radiomarine.org/ .
>
> Back then, I ran 850 Hz shift and 170 Hz was just starting to be used. 
> I seem to remember 3.625 MHz as a common RTTY frequency. I used that 
> and something on 40 meters.
>
> On the use of LSB when generating using AFSK, I remember "LSMFT" or 
> Low Spac Makes Fine Teletype." Back then the AFSK tones were 2125 and 
> 2975 Hz with mark being on the lower frequency, and an LSB transmitter 
> would invert these to transmit LSMFT.
>
> On autostart, I did some autostart RTTY on the local 2 meter repeater 
> when I was in college. In high school, I ran a single wire about a 
> mile to a friend's house. We put a model 15 at each end and ran a 60 
> mA current loop against ground. We added a relay with time delay in 
> the loop. We each had a power supply so we could supply loop current. 
> Either of us could start both machines by supplying loop current. When 
> we were done, we'd shut down the loop current. Both machines would 
> "run open" for a second, then shut down.
>
> So, I look forward to watching you guys on the SDR!
>
> Harold
>
>

--
I maintain that we close the patent office:
Everything that can be invented has been invented.

-Charles Duell, Director of U.S. Patent Office, 1899
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