[ML-Hams] Latest Donation

[Bruce Campbell]

Jeff,

Have you seen anything that looks like this around the shack?
http://www.geocities.jp/tnc_gallery/mfj70b_1.jpg


On Sat, Oct 1, 2016 at 8:23 PM, Bruce Campbell <phillybruce at gmail.com>
wrote:

> There was an AX-25 TNC around there at one time. You would have all that
> you need for a packet station.
>
> On Sat, Oct 1, 2016 at 8:05 PM, Kris Kirby <kris at catonic.us> wrote:
>
>> 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
>>
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>
>
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