[GreenKeys] GKN QSOs

[tony.podrasky]

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