MODS FAX MACHINE for HAM

[testingpurpose]

Hi,

I'd like to reuse old fax machine for ham. It will be nice to interface such machine with HF rig.

Any information ?

Have a nice day. Oleg

 

[Sceadwian]

Yeah, look up SSTV on Wikipedia

 

[Nigel Goodwin]

Hi,

I'd like to reuse old fax machine for ham. It will be nice to interface such machine with HF rig.

Any information ?

Facimile was done decades back, using really old fax gear, at very slow rates, with paper wrapped around a rotating cylinder. Modern faxes are completely different, and work at a far, far faster rate, totally unsuitable for sending over an HF rig.

 

[testingpurpose]

Hi all,

Thanks for replies. May be I'm wrong but past and present fax always use phone line with 300-3000Hz bw. So problem may be only on interfacing for injecting this modulation on hf rig. (There is a lot of old machines dropped every day and it can be a way to reuse them...)

Have a nice day. Oleg

 

[Nigel Goodwin]

Hi all,

Thanks for replies. May be I'm wrong but past and present fax always use phone line with 300-3000Hz bw. So problem may be only on interfacing for injecting this modulation on hf rig. (There is a lot of old machines dropped every day and it can be a way to reuse them...)

Present fax machines use a high speed modem, plus a duplex connection, an HF radio link isn't suitable for this. The obvious way to do fax over radio is a computer, and presumably there will be plenty of info about it?. SSTV is done via computer these days as well.

 

[Sceadwian]

SSTV is purpose built to do exactly what you want, if you want to re-use the fax machine you need to tap into the scanning circuit and do it yourself.