I need help finding a decent part 15 long wave transmitter even if it's a kit. I know what you're going to say. North Country Radio makes one, but it has been discontinued. I need something that will go up to 100 mW to 500 mW and it's going to be set to 165 kHz or 175 kHz. I wish that iAM Radio would support the LowFER's part 15 broadcast community with a talking house AM transmitter that does not just tune the MW bands from 520 kHz to 1700 kHz, but also 160 kHz to 190 kHz, even if they can come out with a 2 band version of the TH 5.0.
I would appreciate if someone can help me with this, supply a schematic, link to a kit or something. My main LW (NFM) 175 kHz transmitter is off the air, and I am going to be running it back on the air soon when the time comes. It's still winter time, but we are getting mild weather here in Virginia Beach, VA area.
gccradioscience
Adam E.
Man North Country was the only one I knew about.
Only 7 days for download.
I posted the link in 2011, but now its dead. @Neil can you put the article in the library??
Rob Veld
Adam,
Believe it or not, the SSTran AMT3000 will do Longwave.
Expanded 10 khz Frequency Chart (.pdf)
Directions for modifying the SSTran for Longwave use.
Good Luck.
Try Googling that. Just for fun.
It should be there. (If that's the transmitter
you are thinking of.)
Not easy to build and work with that
high voltage. I don't recommend it.
Could be very dangerous. The article is really
fun to look at though.
Brooce, Part 15, Hartford CT
P.S. Working with vacuum tubes and
high voltage is dangerous. It's very hard
to do the metal work and get the parts.
My best "electronics buddy" built one in 1975.
It looked very very much like the one in the
magazine article.
Try Googling that. Just for fun.
It should be there. (If that's the transmitter
you are thinking of.)
Not easy to build and work with that
high voltage. I don't recommend it.
Could be very dangerous. The article is really
fun to look at though.
Brooce, Part 15, Hartford CT
P.S. Working with vacuum tubes and
high voltage is dangerous. It's very hard
to do the metal work and get the parts.
My best "electronics buddy" built one in 1975.
It looked very very much like the one in the
magazine article.
Brooce
No reply from Adam,
I have him on my facebook to which i have been informed that i still need to use to contact certain people in my life regardless of my own personal disgust with social media.
I guess i could give him this information via Farcebook then. Right then, off i go.
By the way. The comments I made
on tubes and high voltage- - I know
you guys are knowledgable about that stuff. I just
said that for any
people out there who are unaware.
Brooce, Hartford
I have been away, but I have been mostly on Facebook, and trying to get something else working such as my Sound Wire servers for my WiFi network. Thanks for the file for the 10 kHz increments, but when I was at North Country Radio, they said that the AM-LW transmitter AM-88 has been discontinued, and that was the reason why I thought I wasn't going to get that much reply. Thanks for replying back. I may end up buying a Vectronics 1290K AM transmitter kit and install inductor sockets, instead of just the inductors themselves and maybe add a 12 pole selector switch and solder the molded chokes on a protoboard to get various frequency ranges for expermental broadcasting.
What sort of capabilities do you need/want? Modulation type? Beacon capabilities?
In post 3 Rob put up a link for an article on this topic but the link is dead. With Rob's help I was able to find another link to it which should stay alive.
Go here: http://www.americanradiohistory.com/Popular-Electronics-Guide.htm
Click on Jan 72 and go to page 58 of the magazine (page 52 of the PDF).
Maybe this will give some ideas including for a solid state design.
Neil
Thanks Neil for this coöperation. My first idea was that you can change the design in partly solid state, such as the exciter/oscillator or/and modulator.
I have build a partly solid state TX (1 Watt) with a divider/oscillator and a solid state kathode modulator (but it's on medium wave).
Rob V.
What have you come up with so far GCC?
Any luck yet?