Longwave and pF
So I would like to use the SStran AMT3000 in the longwave band, to achieve this C30 a 180 pF capacitor must be changed to a slightly higher value.The pll with 180 pF cap installed will only allow the...
View ArticleF-S CZH-0B FM Transmitter Mod
If you want to run your transmitter at full legal power, do the following:1) Take apart the unit by removing the eight screws on the back and front of it.2) Locate the power transistor (Q7) and remove...
View ArticleAMT5000 Switch Settings
I am in need of some help from someone who owns the AMT5000. I left the instructions for mine at my cottage 150 miles away. I need the DIP switch settings for setting the frequency. I would have...
View ArticleEDM-LCD-CS Transmitter Test and Review
Hot off the press: http://www.ironrangecountry.com/edmreview.pdf TIBForums: Transmitter Talk
View ArticleComments on FM Range, Antennas and Balloons
You better pour another cup of coffee...Probably the number one thing asked about a Part 15 transmitter is range. Be it on this forum, or any of hundreds of other forums where radio and electronic...
View ArticleLongwave Part 15 Transmitter
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...
View ArticleConverting SSTRAN3000 to drive 50 ohm antenna
For operation around 1600 KHzChange these parts:Change C23 from 820pF to 560pF.C5 replace with 1800pF fixed capacitor, polycarbonate 1800J.Remove L4, L5, L6, L7 and replace with a single toroid coil,...
View ArticleBARIX Security
Just received this FCC notice through my SBE Chapter. it may apply to some of you as well: "The Federal Communications Commission is requesting your assistance in disseminating the information below to...
View ArticleTalking House Audio Low End
Radio peoples-Has anybody ever come to a solid conclusion on how to open up the audio response on the talking House 5 standard version? I have read all the prior posts on this and there seems to be...
View ArticleNew tube type am transmitter
So I purchased an am tube transmitter on eBay from a gentleman in Virginia who builds them. I paid a fairly high price, but I feel it's worth it. His design involved three tubes. It plugs into the...
View ArticleNew Thoughts in Sychronized AM Transmitters
As a longtime part 15er it has gotten to feel like there is nothing new to think about, but that all changed with the March issue of Radio which on page 16, RFENGINEERING by Jeremy Ruck, PE, presents...
View ArticleRIP International Crystal
The mention of crystals in the thread about syncronized transmitters reminded me...I saw this a few days ago: http://www.arrl.org/news/international-crystal-manufacturing-going-out-o... I sure bought a...
View ArticleLooking for information on Ramsey FM25, not A or B
Fortune recently favored me when I picked up a box of electronics ‘stuff’ from a friend (to replenish my own ‘junk box’.) I was looking for a case for a project and when I opened up one of what I...
View Article5 Transmitters 1 O'Scope
Here at the KDX Control Desk located in the Vacuum Room of the Internet Building we have a single computer workstation that generates all the audio programming which is distributed by various means to...
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Solar Powered FM 0-25 watts...
Scaled down to Part 15 power levels would probably make this item to costly to use but the idea has been brought up here numerous times. Maybe in New Zealand...So here is a company offering a turnkey...
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FME500/SG/1525 from the grave
AttachmentSizeFME500 1112.39 KBFME500 262.51 KBFME500 370.74 KBDecided to dig out an old work of art and see about getting it fired up and working again.This LPFM broadcast I had built back in 1995...
View ArticleTypical frequency used with SSTRAN 3000
I am curious as to the typical broadcast frequency selected by folks using the SSTRAN 3000. I am working on modifications to increase the effective power output (within part 15 rules) and would like to...
View ArticleI need AMT-3000 switch settings for 620 kHz
I can't find the manual. I just want to run itthrough my carrier current coupler.It won't go far. But I'm wondering what it WILL do.Just for fun. 620 is blank here during the day. (Nightimeit sure...
View ArticleFaulty Inovonics 235??
I have an Inovonics 235 feeding a Sstran amt 5000. Over the past couple of years, I've tried to play it by ear regarding the modulation. I just got an Inovonics 520 AM mod monitor off of eBay. On...
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AMT-5000 problems peaking RF output
I am now even more frustrated than I can possibly describe in a polite manner. I've tried everything I can think of plus what has been suggested. No matter what I do I get 0.144v when measuring RF...
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