Looking for ATC100B

[XXL]

What scrap electronics will have a lot of ATC100b or equivalent in them? I thought id do some recycling while saving my wallet at the same time. I was thinking an old microwave maybe ? I have no idea.

[teckniqs]

[sinus trouble]

Whilst i admire your passion for saving the Planet, I doubt you will find those components in Domestic Appliances!

Maybe obsolete communication equipment would be your best bet, If you have access to those kinda things?

[Albert H]

Microwave was always OK for short hops, but if I wanted to go several miles (like Orpington to Crystal Palace, for example) UHF was always the choice. I used TV Yagis at both ends, with ridiculously high gains and narrow beam angles. I only needed a couple of hundred milliwatts out of the link rig to go miles! The receivers were usually Philips TV tunerheads with a twin-conversion IF - ~39MHz down to 10.7MHz, and then a conventional IF (usually with a PLL demodulator to get an extra few dB of useful sensitivity) to recover the audio or stereo multiplex.

[Krakatoa]

Maybe you could order samples, if you come up with a plausible explanation that you are working on a future project and work for X company etc, that could get you enough pieces for your one-off prototype.

[XXL]

Microwave was always OK for short hops, but if I wanted to go several miles (like Orpington to Crystal Palace, for example) UHF was always the choice. I used TV Yagis at both ends, with ridiculously high gains and narrow beam angles. I only needed a couple of hundred milliwatts out of the link rig to go miles! The receivers were usually Philips TV tunerheads with a twin-conversion IF - ~39MHz down to 10.7MHz, and then a conventional IF (usually with a PLL demodulator to get an extra few dB of useful sensitivity) to recover the audio or stereo multiplex.

Yes Albert you keep banging on about band 4 but no one has ever made any designs for it in pirate radio and I’m not about to go down that rabbit hole myself because it’s harder to make diy gear that far up the band. Especially when I have loads of satcans in a draw doing nothing.

I only half know what I’m doing when it comes to RF. it’s sooo hard to design something that actually works well. I’m a complete DIY’er.

If you have any designs you could post on here I might give it a go but I can’t start from scratch. I just don’t have the knowledge.

[Albert H]

Band IV is a doddle. You just need to use BFR91 for multipliers and amplifiers, and BF961 for your oscillator.... A standard PLL at around 65 MHz multiplied up to around 500MHz.... Look for the Dutch 60cm stuff from a few years ago - there are board layouts and circuits on the 'net if you look around!