HFU HF Underground

Technical Topics => Equipment => Topic started by: envytea on September 04, 2018, 1533 UTC

Title: Source "tracability"
Post by: envytea on September 04, 2018, 1533 UTC
In another thread in the equipment section there is reference to "tracability" of purchased equipment. My friend is interested in building xmitters for lowfer (cw beacon) and possibly AM xmission on like 6.9 to 7.x mhz (for experimental purposes, using adummy load, but ultimately without a license). To get started, she is looking at xstals on mouser to build around. Is it truly concerning to purchase from a source like that?
Title: Re: Source "tracability"
Post by: JimIO on September 04, 2018, 2003 UTC
I posted in that thread. I mentioned "Radio 741 RF and Microwaves" as a source. Someone else said they could not find it. It's too long for me to type and I could not figure out how to copy and past it. I got a couple of crystals from them. Came airmail from Greece in only 4 days. Here is a link:

https://www.ebay.com/itm/6250KHZ-CHANNEL-293-FT-243-CRYSTAL/191993567215?hash=item2cb3b557ef:g:6eQAAOSwPCVX~itB

Click Visit Store to see what else they have and GO FOR IT!
Title: Re: Source "tracability"
Post by: Stretchyman on September 04, 2018, 2012 UTC
Xtal manufacturers are few, I have met a local UK one who'll make whatever you want.

Personally I'd go DDS as they're so cheap and have SW to run them.

We could 'Colaborate'!

I have some useful design and PCB layouts to get you started.

At least you'll know where the bits have come from!

Most Traceable!!

Str.
Title: Re: Source "tracability"
Post by: JimIO on September 05, 2018, 0030 UTC
My earlier post was about what I did. I would not try to build an AM transmitter from scratch. I found those crystals because that was what I needed for a used transmitter I got off ebay. Still waiting for a few more parts. A more straight forward way to go would be to look into one of Stretcymans LULU clones. He is always around if you need help.
Title: Re: Source "tracability"
Post by: Stretchyman on September 05, 2018, 1309 UTC
Still have a pile of V4 (pre GaN) PCB's left, built with 6930 Xtal, just need 3 toroids winding.

Simples....

Str.

Title: Re: Source "tracability"
Post by: outhouse radio on September 05, 2018, 1505 UTC
you could go on ebay and buy up a bunch of ft 243 crystals and grind them up to the freq you want.
of course the freqs won't be perfectly centered, but this is pirate radio you are talking about.
if it was perfectly on freq and predictable it wouldn't be any fun. kinda like listening to a lulu wobbling along in the distance  ;)
if you are worried about parts being traced you could act real paranoid and grind all the part numbers and markings off them
so no one can tell what value the parts are or get numbers off them  ;)

should i even mention wearing gloves while building and handling transmitters that you don't want traced back to you  :o
finger prints show up really well on homebrew circuit boards and the insides of the boxes they are put in OOOPSY  ???

 :-X :-X :-X :-X :-X
it's a shame that you have to fear others in the hobby more than you do the gmen
 >:(
Title: Re: Source "tracability"
Post by: envytea on September 05, 2018, 1716 UTC
Thanks for the feedback.  It is much appreciated. 

JimIO, I have reached out to the Grecian crystal palace on Ebay and ordered a couple quartz pieces!  Thanks for that.

Stretch, some PCB patterns would be great.  I use the printer iron-on etching method, so that would be really cool. I'll PM you sometime to discuss.  Thanks!
Title: Re: Source "tracability"
Post by: JimIO on September 05, 2018, 1806 UTC
You will need sockets for those crystals. They are hard to find and expensive, but an octal tube socket works fine. Just looks funny.  :P
Title: Re: Source "tracability"
Post by: Stretchyman on September 06, 2018, 0931 UTC
PCB's are easily made by ordering them from PCB supplier.

Gone are the days where it cost $100's to get a design done.

I use OSHPARK, there's plenty of others, just supply the gerbers.

Don't waste your time using any other method.

I need to move (sell!) a load of PCB's before I'll release any designs but I'm happy to.......

BTW, I  had wrote a somewhat OTT reply to the initial post but then thought I'd got the wrong meaning of 'Tracability' and removed the post

But if you are 'Concerned' about being 'Traced' from something you've made you seriously need to chill and stop being paranoid.

NO_ONE gives a monkies about you or what you're doing, trust me, they have much bigger fish to fry.

I know I used to work for 'The Man' many moons ago....

The internet is a blessing for them as they monitor you on there NOT on SW radio!

We don't do paranoia in the UK!!

 ;)
Title: Re: Source "tracability"
Post by: Antennae on September 14, 2018, 0215 UTC
I encourage you to be paranoid.  Its good mental exercise.  Just being a member of this website makes you a possible dissident. So be careful who you share your address with because they could be working for The Man.

This link is an awesome story of a paranoid fellow who discovered how police caught him using Stingray and thats how the technology came to light:
 
https://www.businessinsider.com/how-daniel-rigmaiden-discovered-stingray-spying-technology-2015-6

The Man Lurketh
Title: Re: Source "tracability"
Post by: JimIO on September 14, 2018, 0408 UTC
"I encourage you to be paranoid.  Its good mental exercise."

My brain is too old for exercise!

https://en.wikipedia.org/wiki/Stingray_phone_tracker

See: 1.3.3 Tracking and locating. I don't buy that story.
Title: Re: Source "tracability"
Post by: Josh on September 15, 2018, 0433 UTC
If you buy something online, there's a trail leading to you. If you order parts online there's a trail leading to you. In the USA every parcel that sees USPS is photographed, dunno how long the images are stored, or so I've heard. A cashless society controlled by ai will be the end of privacy and freedom, not to mention dissent.
Title: Re: Source "tracability"
Post by: JimIO on September 15, 2018, 1524 UTC

SSGI = Shiny Side Goes Inside

MOFA = Make Orwell Fiction Again
Title: Re: Source "tracability"
Post by: JimIO on September 15, 2018, 1538 UTC
Anybody heard of or used this place?

Cables & Connectors, Inc
2307 Berlin Turnpike
Newington. Ct. 06111
860-665-9904
fax 860-665-9993
cables@cablesandconnectors.com

http://www.cablesandconnectors.com/


Title: Re: Source "tracability"
Post by: Antennae on September 15, 2018, 1604 UTC
Hey Josh, when I sold craigslist stuff to some college kids, they wanted to use apps to trade money instead of cash. 
There's always swap meets and barter...and not bringing your cell phone.
I've been thinking that if there was some A.I. system where everything was transparent, it would prevent a lot of crime. Its like stone age villagers that live under the same roof. You can't hide anything from your kin so that encourages good behavior. 
Title: Re: Source "tracability"
Post by: Josh on September 15, 2018, 1808 UTC
Hey Josh, when I sold craigslist stuff to some college kids, they wanted to use apps to trade money instead of cash. 
There's always swap meets and barter...and not bringing your cell phone.
I've been thinking that if there was some A.I. system where everything was transparent, it would prevent a lot of crime. Its like stone age villagers that live under the same roof. You can't hide anything from your kin so that encourages good behavior.

The problem is twofold. One is someone gets to determine what is good behaviour, the other is it's all done by force. But let us enjoy the freedom of the airwaves while it lasts! Invisible airwaves crackle with life, Bright antenna bristle with the energy.