Ramsey AM-1 schematic needed
Hello! for some reason the schematic page of my otherwise complete downloaded Ramsey AM-1 transmitter schematic is blank. everything else is there including layout. But no schematic. Does anyone have...
View ArticleOlder model CC Crane FM Xmtr quick mod works out nice!
Did the quick mods on my two Ebay aquired used CC Crane V1 FM Xmtrs: Turned VR2 all the way up, and gently snapped out the X1 crystal to go mono. They went from barely covering the inside of my...
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Young kid builds impressive tiny FM transmitter
Stumbled across this well done video by some kid showing how to build a tiny FM transmitter that from his presented field test appears to rival the capabilities of my CCrane....
View ArticleTalking House (Enhanced Version Photos)
There has been a lot of discussion about V5 Talking House units. Not all are the same. I have included (hopefully) a link to view the photos I took. If you don't see these mods you do not have an...
View ArticleShould I have my Transmitters in my bed room?
So somewhere else I was talking to someone about my transmitters and how I got them setup. I got them in my bedroom next to my window. I was told though to be careful of doing that because I might get...
View ArticlePart 15 Transmitters in Oceanside Environments
Noted a discussion with our own RichPowers about this on another site.I had a Decade MS-100 inside a weatherproof box on Bowen Island pretty close to the water, running 24/7. Absolutely no damage at...
View ArticleSS-tran AMT 3000 PLL. (i give up)
so with these chips, i managed to make the tompolk PLL work with 13.8V. no such luck with the SStran 4 chip PLL on 5 volts. since i found that unsoldering components also ruins the PCB trace, im gonna...
View ArticleSo Near but Too Far
All week a Radio Systems TR6000 Transmitter was on auction at eBay, and as second bidder my offer of $103.00 stood most of the week.TR6000 is adjustable 0-10 Watts for TIS and carrier current, new...
View ArticleELECTROMAGNETIC WARFARE
Would the Navy conduct electromagnetic warfare experiments on unwitting civilians in the United States?After all, most people routinely debunk any harm from electromagnetic energy, despite knowing...
View ArticleDecrypting Schematic Diagrams
The Part 15 FM transmitters pose a challenge for the ambitious engineer hoping to improve them with modifications.A modification might be, for example, adding a switch to turn off the stereo...
View ArticleThe Case for 100 mW AM
Reprinted by self permission from thealpb(dot)com originally posted Jan. 2016Some are naturally disappointed by the 1/10th Watt of power allowed for legal Part 15 radio transmission, or, by the same...
View ArticleMargin of Error
While pondering Tim in Bovey's curious findings regarding "Certified" Part 15 FM transmitters, in which every transmitter measured was either over or under the specific field strength seen in...
View ArticleCable modem power supply puts noise over the air
Gents,I've had a horrendous ground loop making its way onto the air and narrowed it down to the power supply of the cable modem. This also occurred with the power supply of the DSL modem I used to...
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my homemade PLL transmitter
AttachmentSizePLLhorseman.jpg64.91 KBtompolk PLL design (with different resistors around the VCO)2n7000 mosfet output, can easily do 600mW of carrier with no sweat or heat, but the LM386 modulator is...
View ArticleRamsey AM-1
Recently a member mentioned improvementsthat were made to his Ramsey AM-1. I believe it had to do with the modulation scheme.I have had an AM-1 for 20 years. Although itis not the greatest thing in...
View ArticleNew Idea Thread
I ran into MICRO1700 at a laundromat and we got to talking.MICRO had an idea I've never thought of for Part 15 FM stations used as Studio-Transmitter-Links (STL), but otherwise do not want to attract...
View ArticleInfoSpot Transmitter
Looks strangely familar. http://www.theradiosource.com/products/infospot.htmForums: Transmitter Talk
View ArticleStories of AM Deconstruction
KGO AM 810 is a 50 kW San Francisco news station... well, not any more. The entire news staff has been dismissed as times change.KGO LAYS OFF NEWS STAFFForums: Transmitter Talk
View ArticleCurrent FM Transmitters
Just gathering information. Other than the C. Crane FM Transmitter 2 and the Whole House 3.0, what are current, commonly available, actually certified FM transmitters out there these days?Don't give me...
View ArticleTwo Programs from One Transmitter
While tuning around the shortwave dial as the sun went down I came across a clear signal that happened to be a religious program describing their various satellite channels that I guess were used to...
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