Subj : Re: Using AX.25 w/older h To : Damon A. Getsman From : Ed Vance Date : Sat Feb 28 2015 11:00 pm 02-27-15 15:28 Damon A. Getsman wrote to Ed Vance about Re: Using AX.25 w/older h DAG> @MSGID: <54F1A916.757.amtradio@capcity2.synchro.net> DAG> Re: Re: Using AX.25 w/older h DAG> By: Ed Vance to Damon A. Getsman on Thu Feb 26 2015 00:23:00 Howdy! Damon, -snip- EV> I got the C=64, Floppy Drive and 300 baud Modem to start out with. EV> I've seen how slow Tape transfers were and didn't want that, I wanted EV> the FDD even though it was very costly back in 1984. DAG> Yeah. :) I was donated my first Atari, a 600XL (with a DAG> WHOPPING 16K of memory), and all it had was the analog tape DAG> drive. God I even had 3 backups of some of my programs. That DAG> medium was actually volatile enough that I had times when I DAG> still couldn't recover despite 3 backups. That was horrifying. That was a very bad experience, I've had my share of them too. "Computers alway win because they have inside information" is a phrase I made up. DAG> Writing one hundred lines of code back then (which would come DAG> close to filling up the memory) really blew my mind; losing it DAG> was a horror. This was very early 90s, maybe a little bit in DAG> the late 80s, also. Whenever it was, 180-360k floppies were I remember those times well. Still have a working C=64 in this room, but I don't use it much. DAG> the norm, and 1.2m floppies weren't far behind, either. Most DAG> people were working with 640k of memory by that time, not 16k. DAG> Eight-bit was definitely quickly becoming a thing of the past, DAG> though many still used it. Until 1994 I only had the C=64 with 38K of BASIC memory. EV> I just know pieces and bits, and had help learning what I learned from EV> some other Hams who took their time explaining what's what to me. DAG> Well I certainly do appreciate any of y'all that are taking DAG> the time to share bits of this all with me now. :) Here on FIDO there a lot of folks to get help from. -snip- EV> When You get back into doing that High Voltage stuff be very very EV> careful and don't let it 'talk' to You. DAG> Okay, I've got to ask. I'm having mad scientist visions here DAG> with people falling into trances looking at tesla coil DAG> discharges and deciding that the truth to everything lies DAG> within them, thus getting fried by the human bug zapper. I'm DAG> pretty sure that's not what you mean... Can you elaborate? :) As I mentioned in my in my last line I was thinking of 2000 volts on Plate circuit of a RF Final Amplifier. EV> Those two 10 Turn POTS came with a calibrated dial that could be locked EV> to keep it from moving. DAG> Those 'helipots' sound pretty useful for some stuff that I'm DAG> trying to work on right now, I might have to see if digikey or DAG> some other retailer has them for a decent price. Hope You can find them. EV> The VEC Test Question Pool can be downloaded from http://www.ncvec.org EV> if You want to study them. DAG> I do very much so; synchronet has a door for it, too, but DAG> it'd be great to have something I could put on hardcopy, also. DAG> Thank you for the info! -snip- EV> Yes, as long as the difference in the Mark and Space frequencies were EV> 170 Cycles apart, my configuration worked like "Duck Soup". DAG> I am floundering to know what this means. Amateur Radio RTTY uses a frequency shift of 170 cycles. The old time RTTY standard was 850 cycles between Mark and Space, but 170 cycles was found to work very well. I don't know if Commercial RTTY uses 170 cycle shift or not. -snip- EV> There are many things that Hams are interested in, I've only done a EV> tiny bit if what Hams do. EV> But what I do I enjoy, You will enjoy it too, just only put one hand EV> in the final amplifier, keep the other one in your pocket. EV> 73 DAG> Gotcha. Thank you so much for the info dump. I greatly DAG> appreciate it. :) I've got lots of tabs open for things to DAG> look at now. :) DAG> Best wishes. That's 73 in Ham Radio lingo. 73 to You too. --- SBBSecho 2.12-Linux * Origin: telnet & http://cco.ath.cx - Dial-Up: 502-875-8938 (1:2320/105.1) .