[ML-Hams] Latest Donation

[Kris Kirby]

On Sat, 1 Oct 2016, Bruce Campbell wrote:
> do you know there history?

WA4DXP-1 was HSVN on 145.01, WA4DXP-5 was HSVN on 145.65, both Alinco 
DR-1200s; I believe WA4DXP-6 was 433.8 MHz using an RCA radio. Or 
WA4DXP-6 was 145.65, and WA4DXP-5 was something else... 

K4IQU (Dave Light) was the callsign of 146.94/34 before it had the N4HSV 
callsign on it. The BBS (K4BFT/K4BFT-1) had the club call as well. 

144.97, 145.01, 145.05, and 145.09 were all used for 1200 bps AX.25 
packet radio, along with 145.65. 147.565 was used for 9600 bps packet. 
433.8 was 2400 bps. The maximum common rate that fits in a voice channel 
without 'tricks' was 2400 bps. Motorola liked 3,600 Hz using MSK for 
trunking. 9600 bps required access to the modulator and discriminator 
because 9.6KHz was outside of the audio system's 300 - 4 KHz bandwidth. 

1200 bps was the shipping data rate of the TAPR TNC2; 2400 bps and 9600 
bps required modems be installed on a 20-pin connector in the TNC2. MFJ 
must have sold 10,000 of those TNC2 clones. 

I refer to AX.25 1200-9600 bps as "802.11 dot slow." 

But then again, I still have my KPC-9612. 

--
Kris Kirby, KE4AHR
Disinformation Architect, Systems Mangler, & Network Mismanager