Damon,   
      
   The 555 A.F.S.K. Oscillitor circuit I connected to the Netronics ASCII/   
   Video board I found in the May 1977 edition of QST magazine on page48 .   
   The circuit also uses three 2N2222 Transistors and other parts.   
      
   The circuit I used for a RTTY Demodulator I 'borrowed' from the   
   Microcraft(R) RTTY Reader article in the November 1979 issue of Popular   
   Electronics magazine.   
   It had three I.C.'s, two 1458 and a LM301, two 2N2222 (or 2N3904)   
   Transistors and other parts.   
   I also had a 7414 I.C. which I used two of the NOT sections in it to   
   either let the signal from the Demodulator go as is to the Netronics   
   Board, OR to Invert the signal if I needed to.   
      
   Those two circuits I call my 'RTTY Modem', and I used two I.C.'s, a   
   74LS04 and a 74LS00 plus some switches to interface it to the Netronics   
   board.   
      
   The ASCII/Video board had a MK3870 F8 Microprocessor on it.   
      
   I visited another Ham who was showing me his CW Video Keyboard that   
   he bought which could Send and Receive CW up to 60 WPM.   
      
   I asked him if I could see the schematic for it to see what made it   
   work and noticed it used the same Microprocessor (uP) that was in the   
   Netronics ASCII/Video circuit.   
      
   On his schematic I saw a Reset Switch was connected to the uP, so I   
   copied that portion of the schematic, so I could add it to my RTTY   
   set up.   
      
   I wanted that Reset Switch circuit really bad because the Power Supply   
   I bought from Netronics to run it, didn't have a Power Switch, and I   
   had to unplug the power supply whenever I wanted to change to a   
   different speed.   
      
   I had two SPST Toggle Switches on the back of the Keyboard case which   
   I used to change the Baudot or ASCII speeds.   
   They were wired up to two sets of Jumper terminals on the ASCII/Video   
   board because I didn't want to solder the jumpers for only one speed   
   and then have to open the case up to Unsolder and Solder those Jumpers   
   for a different speed/mode.   
      
   I usually used 60 WPM - 45.45 Baudot but I also used 100 WPM - 74.2   
   Baudot and 110 Baud ASCII, so I added the 'borrowed'Reset Switch   
   circuit to my setup.   
      
   The first time I pressed the Reset Button to change to a different   
   speed, I ZAPPED (Fried) the MK3870 uP and had to order another one   
   from Netronics. Go ahead and laugh, I don't care.   
      
   While I was waiting for the new uP to arrive in the mail I removed   
   the Open Circuit SPST Pushbutton Switch and put a Closed Circuit SPST   
   Pushbutton Switch in.   
      
   I used that switch to interrupt the power coming from the Power Supply   
   line before it went to the circuit boards inside the Keyboard cabinet.   
   That Modification did what I was wanting to do when I wanted to change   
   to another Speed or Mode (Baudot or ASCII).   
      
   I was able to use 3 out of the 4 available speeds the Netronics ASCII/   
   Video board was designed for by flipping the Switches that were wired   
   to the two Jumper Connections on the board.   
      
   I never was able to Receive or Make a contact with 300 Baud ASCII, but   
   I am satisfied that I could use 3 of the speeds for my Ham Radio hobby.   
   73   
      
   P.S. The main reason I thought to tell You all this was to show You that   
   I am not 'The Man' who knows everything when it comes to changing the   
   way a circuit is designed.   
      
   Usually I will talk to someone before I change things to see what they   
   think of my idea, I didn't that time, and it cost me, iirc $37.00 USD   
   extra for the 2nd uP.   
      
   I try helping and saying what I know or 'think' when I hear of some   
   need that I believe I can be of help on.   
   Just don't take every word of mine as GOSPEL, I was called a LID by   
   the Hams I knew in High School BEFORE I even got my Novice License.   
      
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