11-17-17 09:43 Holger Granholm wrote to Ed Vance about Re: Ham Radio Digital
od
Howdy! Holger,
HG> @MSGID: <5A1004D7.1716.amtradio@capitolcityonline.net>
HG> In a message on Friday 11-16-17 Ed Vance said to Holger Granholm:
^^^^^^
I ain't meaning to nit pick but 11-16-17 was a Thursday, wasn't it?
-snip-
Note: I started this Reply around 3PM 11-18-2017 but preThanksgiving
activities and some other stuff delayed me finishing it to send it.
EV> This new fangled stuff we just have to get adjusted to, don't we?
HG> Yes I have.
HG> There's no special test equipment needed, except a signal generator
HG> that can give a digital TV signal, ....
EV> I didn't know He only needed to get a Digital TV SigGen to work on
EV> the newer gear.
HG> No one expects you to know it, but your friend should have known.
That QSO was many, many years ago and what I wrote about Him was what
I thought I remembered hearing Him say.
^^^^^^^
EV> was inside of a TV Set, except for taking some 7 Pin and 9 Pin Tubes
EV> out and taking them somewhere there was a Tube Tester.
HG> Tube testers were out long before production of tube TV's ceased.
HG> A TV-service shop usually had a stock of new tubes, so it was easier to
HG> plug in a new one into the socket of a suspect one.
Usually I used Tube Testers at a Hobby Shop or Drugs Store when I wanted
to test a few Vacuum Tubes.
I did bother a neighborhood TV Service Man to use His Hickock Tube Tester
to see if a 7F8 Octal Tube that is in my Hallicrafters SX-42 needed
replacing. That was back in 1965 iirc.
HG> A mobile service enginer also had a stock of new tubes in his tool box.
I have a few spare Tubes in a box for Amateur Gear and Stereo Amplifier.
EV> The TV Sets I have now only have One Tube in them, the Picture Tube.
HG> I don't have any TV sets with tube's. The monitor I'm using for the BBS
HG> is the only one with a picture tube.
I put my MAG Innovision MX15F back in the box when I replaced it with a
HP vs19e.
The 15" MAG MultiSync cost $535.00 USD (iirc) back in February 1994 and
the HP was priced at <>$200.00 USD.
I got the MAG MX15F because of listening to another Ham talking about how
great of a Monitor it was.
I really was drooling over MAG's 17" Monitor but it would had cost an additional
$200.00USD, much more than this Cheap LID could talk His YF (Wife) (the
Disbursing Clerk) into allowing Me to get.
The 15 Incher was fine until I walked in a store and saw the price for
the 19 Incher and it was a flat screen Monitor.
Of course I mentioned to the YF the 19 Incher used a LOT LESS ELECTRICITY.
EV> Have You noticed if there any lapses or delays to the transmission
EV> that You are listening to when You're using any of those Digital
EV> Modes wheather during a QSO or You're SWL'ing the Band?
HG> I am not using any digital modes except A1A (CW) on ham radio!
Back when I was active on the air I used CW too.
Also BAUDOT RTTY and Packet Radio.
What TX/XCVR are You using for CW?
Pardon Me for this long story, which I may have already written about:
While I was overseas from the Navy Base Alameda, CA Ham Shack K6NCJ,
the Officer retired and another Officer became in charge of K6NCJ for
Navy Special Services at the Base.
When My outfit got back to the Base I learned that I no longer could
sign the log to get the Key to the Ham Shack because I had to be checked
out on how to operate the Newer Radio Gear that the new Officer had put
in the shack.
After a while I learned who I needed to see to be shown how to operate
the New Radio Gear, and made an appointment with the Officer to find out
what I needed to learn so I could get on the Air.
Inside K6NCJ was a Collins S-Line 32S-1 TX and 75S-1 RX.
The Officer showed me how to Tune it up to get on SSB (Single Side-Band).
I asked about using the Collins gear on CW and was told not to try using
it on CW.
Finally I could get the Door Key to K6NCJ and had some QSO's on 20M SSB.
The Manual for the 32S-1 and 75S-1 were in the desk drawer and I read up
on how to tune the 32S-1 to work CW.
After many, many tries of Calling CQ and Calling Other Stations who were looking
for a CW QSO, I finally told the Officer about my failed efforts
to work someone on CW and had Him meet Me at the Shack one afternoon.
He showed me that the J-38 Key was plugged in the VOX Jack on the back of
the 32S-1, and told Me when I wanted to Operate CW to change the Key Plug
to the Key Jack, but when I turned off the gear to put it back in the
VOX Jack.
Now I could Operate CW, finally. Whew!
While reading the 32S-1 Manual and looking at its Schematic I learned the
circuitry used for CW Mode wasn't A1 at all, it was using Audio Modulated
Supressed Carrier Telegraphy A3A which to the best of my knowledge in 1962
was an ILLEGAL Mode on the 20 Meters CW Band.
I'm not sure but my Kenwood TS-520S probably uses Keyed Audio Tone on SSB
for CW like Collins did with their 32S-1 TX.
That's My long story, the best I can remember it. Nuf Said.
HG> What I have noticed is that the more compressed a TV-signal is, the
HG> more is the time delayed. Finnish TV hasn't noticed that or corrected
HG> it, but swedish TV has.
I've thought about trying to listen on 20 M to see if I could find someone using
Digital Mode on the Ham Radio Bands.
It might only be scratchy noise, instead of Donald Duck sounding Audio.
If anyone reading knows what Freq. on 20M HF that the Digital Hams are on
I'd appreciate knowing, so I could listen either on the 520 or My 2-B RX.
HG> .. It's the best I can do on short notice.
HG> -- MR/2 2.30
This is the best I could do for a delayed Reply, sorry Holger . .
73 de Ed W9ODR . .
... Wise? Old? Me? Since when?
--- MultiMail/MS-DOS v0.49
* Origin: CCO BBS - capcity2.synchro.net - 1-502-875-8938 (1:2320/105)
|
