was this bought from aliexpress?

😮😮😮qn8066

do you know if exist a PCB with a QN8007 to be easy buy and get? on ebay maybe? or aliexpres¿

A linear power supply with heavy transformer maybe

Phase lock loop. PLL for people that dont know VCO voltage control oscillator. What about stereo encoder. .? Guess its included.

I'M SHOWING THIS TO DUMBROWSKI

I experimented a bit with MW antennas. When I grounded one ray of antenna - efficiency decreases.The counterweights must be next to the ground - but they must not contacting with ground: you will have losses.

Hi please can I discuss this with you

😮esse integrado ao lado do qn8027 e memoria ..

You did a very good in depth reverse engineering job I’m a old ham guy that has gone rouge LOL yes the eBay ones stay away from. We have a Camel RF from a guy in California that imported the Warner style transmitters puts better parts in that are known to give problems and tests for hours on a dummy load before shipping them out we have the 150 watt rack unit been running it for close to 10 years with no problems and is clean FM audio and does not drift ! The site has disappeared that we got it from was about $1200.00 back then . Do a spot on antennas we have about the last dominator from Norwalk electronics before they went out of business . It’s. .94 wave .

Awesome, I'm really happy that you're back! I'm planning on building an autonomous rig using a tiny car fm transmitter that actually has the QN8007 and a small 7w amplifier.

Yoooo welcome back!

Love your videos. Please make more.

Is it ok to just handle a 200 Watt RF transmitter (like your health)? You mean like those parts are from cellular base stations?

这种发射机都是卖假药的在用

regarding posting videos - don't sweat it pal. just remember, for every lifelong passion someone has, there was a small moment something caught their eye and they never looked away. it's hard to comprehend, but even someone as small as a little video here and there could profoundly impact someone.

glad to see you are back! please continue making videos about this FM transmitters and related stuff.

FINALLY BACK !!! ive been waiting for ages !!!! Dont leave us thslong.Can you test a PCS-Electronics SE version transmitter ?

Glad to see u back!!!

Glad to see you back. Next time you're gone that long, I at least expect a postcard. Interesting video, appreciate it

Hello, back in the 80,when the socialist f. Miterrand free the fm band we used MRF 317 for 100w amp. We couple two 100w with *ceramic microstrip couplers " too i was young but i remember these transistor produce sound during tuning the amp.

ATC100B ceramic capacitance, the use rd15 because heave to much used ones in bages :)

Hello sir, This is really a great video. Thank you

Maby the BLF if overdriven and makes this garbage on spectrum.

Couldn’t believe it when I saw your name in the video title. Welcome back! Your material is always interesting and well presented. Thanks for posting!

In two days I wanted to order the GD-2015S that you showed in the video, I thought it was good but what issues apart from the low power did you have with it? Is your unit defective or are all of them shipped this way? Should I order it or no?

Hey, great to see you back!! ( : Glad you're still pursuing this stuff! Thanks for sharing.

What about the current draw?

I haven't seen you for a long time. Regards

Dear master idol sir, do you have facebook page or fb account to messenger sir???

What is the operating frequency range and driving poeer input. The circuit diagram if you have not shown it in the video please. Ap2kd.

Good to see another video, thanks! - Hope all is OK!

This BLF177 was produced in week 42 of 1999. So it's been here a while :)

I am delighted you're back. Please can you include the indepth circuit diagram of the module ?

Glad you’re back!

Today I bought a new version of this transmitter on Aliexpress and it has IC BH1414K. With delivery to Russia it cost less than $100 in rubles. I will wait impatiently to receive it.

Very interesting Fm transmitters presentation . What could be happen if i use one of this Qn8007 transmitter in texas...with about 30 w..can i have issue with Fcc?

do you heave qn8007 exciter ? do you run RDS on it?

Radio master is so overvalued and rumors is not good about clear signal..

Thank you for the video. But I would like to have seen the 3rd harmonic (if any) also.

Yes but only Frequency response <=+/-1.5dB 100HZ~10KHZ.

What typebof antenna connector does that have? Is it tnc???

The reason that you're able to make that transmitter smaller than this, is it is not designed to test it to the levels that the FCC requires for commercial am transmitter. It may meet the specifications on your test bench. But is the components inside design and such a way that they can be operated 24 hours a day 7 days a week, with varying loading, and very incapacitants as the ground system drifts in relationship to your vertical. Also what kind of actual components do you have as far as when you're talking about 16 kilowatts Peak power how long will it do that much power pink. Most transmitters I've seen that someone is waiting to that high a pep level, will not truly operate at that level very long. Maybe an instantaneous peak. But it's not going to take an average peak. I've used one of these exact transmitters. And yes it will put out a kilowatt of carrier. And it will produce 2.5 times that add up to about $3,000 Watts peak. But only for instantaneous Peaks what it truly generate what you're claiming that it will

Good information. On medium wave and broadcast stuff, a little oversimplifying but you never know your audience. I think I have got a please hire someone to do a voiceover for you. Unless you equalize your voice seriously. It is painful to listen to on a handheld device. With my phone connected to my Bluetooth your voice came piercing through my speakers I'm sure it works great for am. But now I suggest please equal out some of that mid-range😮

Great video. The cussing made it even better. Usually these videos are so dry and boring, made it more exciting haha

I have bought an ELE EL-15s in 7 W version and can verify that the near spectrum is very good! BUT can also tell you that second harmonic suppression is extremely bad! At full power at 88 MHz it is 22 dB down, at 1W -14 dB and at 0.3W (lowest power) it is only -9 dB. Second harmonic is thus fairly constant around 15-16 dBm (30-40 mW) regardless of output power, which is at least 50 db worse than permitted in the EU and cannot be used without an external LP filter. Another disappointment is the very strange AGC function on the AF input which cannot be switched off.

One flaw I have discovered with many of these transmitters is the audio is very muddy due to the Pre-Emphasis being set incorrectly.

Thats very good it has pre emphasis for fm snd filtering so you dont need a 19inch rack this will do

Hello buddy, I have such a transmitter. I have a question, where can I buy the display for this transmitter? It can also be together with PCB. Please reply

Where are you ???