Видео

Liked this simple injector/tracer, need to build one, well done, gratings fron northwest of Mexico Sonoran ground's

In my experiences any Schottky diode is superior to every germanium diode ever made in every way, even a one ampere power Schottky diode is superior to a 1N34A with respect to speed capacity, frequency operation, power drop across the diode and anything else that I can think of. There must be something wrong with these tests. Ron W4BIN

Real 1N34 diodes are point contact. The smaller package has no room to accommodate this structure. The creator Glasslinger has video about testing diodes for crystal radios. Search for "Glasslnger TESTING DIODES FOR CRYSTAL RADIOS".

Recommend an OA79 or even an OA81 ( 1st class for any crystal radio ! ) .. ( tried - n - tested ) .. DAVE™🛑

When I read the title, I thought you would reuse the insides. So this is a little bit of a cheat. Though anyone that would reuse the original or get some new paper and a bottle of electrolite, if that's even possible. would be crazy.

The genuine Ge diodes do have a slightly longer glass package that is either clear or darkened. The point contact can be made out by viewing in clear light.

It is the diodes capacitance that is likely the problem with the "alternative" diodes. The smaller output suggests that they are not rectifying well.

This is probably the reason why people get in trouble with all kinds of radio receivers etc. (including myself) as a lot of Germanium diodes etc. are not produced any more as it was there is only one supply ... China and it is where problems start! I have wasted so much time with some fake products so now I don't care if a product from AliExpress doesn't meet specifications I just ask for refund straight away. I hope everybody does it so it will teach a lesson to those scummers.

Nice job, I'll make this.

Hi there, great idea. Btw, can i use 2 mt3608 so i can have dual output? Thanks in advance.

i was caught too

Can i use a 27mh inductor

How do you prevent the modulation from pulling the oscillator?

I'm just getting started in the hobby and this was so well explained. I feel confident to have a go. Thank-you!

this news 1m34 need to be feed with 1 or 2v to work fine. Use a 1.5v batt to polarize that one...

Thanks for making this. I got one on eBay too and watching this video helped get it up and running.

Hearing Rush on here makes me sad that he has passed away. I like this project and pulling the parts to put one together for myself.

very nice

Nice job Bob! Are you thinking about selling a kit for this? I do some diy guitar pedal stuff and have etched my own toner transfer PCBs as part of that process. Do you have a layout? I'd love to etch a transmitter and give it a try.

Sir ssb bluener about plz

👍👍👍👍👍

Hey Bob! First video, 10th video, seventy eleventh video - doesn't matter - you're a great teacher and the simplicity and performance of this circuit says everything we need to know about your knowledge, heyna? I've just started my journey in electronics. I'm at the "what the heck is an inductor" stage. I think I get it and I've got some 10uH coming in the mail but - can you describe what the purpose of the inductor is here and could it be replaced with something like a voltage regulator or some type of capacitor/resistor/diode combination? Anyway - tanks for the videos - they're brilliant and greatly appreciated!

Modulation index, ever checked that? 90% ?

Thanks Bob, would love to know how this project is going! :)

Thanks for taking the time to put this together Bob. I had already seen and understood about varying the signal from the antenna, but this is the first I had heard about varying the voltage on the tube filament. I bet that was a fairly slow reaction of volume change, I mean, you'd have to wait for the filament to either heat up, or cool down slightly. I'm sure it wasn't instantaneous. Thanks again! :)

Well what d'ya know! I was sold 1N34As just like those. As it happens, I hadn't used them in a proper circuit yet and just dug them out of the spares box to test an in-circuit tester I'm developing (it works without a scope) but sure enough that looks just like waveform you were getting on a low-voltage, low frequency sweep. So I guess I'll put them back as Schottkys! Cheers Robert, brilliant analysis.

I have to agree with you: their engineering effort was wasted on that light display - a decent amp would be a better choice. Some of those little Class-D chip amps are good enough and aren't all that power hungry. Glad I found your channel.

Hello Robert! Thank you for letting more people know this quality speaker kit. Great video! Happy to know that you are satisfied with the kit overall.

Great video Bob, you didn't seem out of practice to me. It looks like a great little kit, I may have to pick one up. I need to check out IC Stations, I hadn't heard of them before.

Bob - no need to apologise, your health is more important then YT, take care of thy self first. Nice build...very nice of your donor. ~Jack, VEG

Hey Bob. Glad youre doin good. 👍👍🌄

Welcome back Bob! Neat little kit.

Robert I am keen to try this circuit, but do not understand what J2 and J3 are connected to? J1 I assume is connected to positive 9V terminal and J4 negative 9v terminal of battery?

Hi Robert thanks for taking the time to do all of this work and share the results. I can't help but think that maybe folks will forget that we can make and mend things for ourselves. All the best . . . Andy

Congratulations on the project. see this project below: Excellent design for AM transmitter class F modulated by switched source. Saulo Project - PY2KO (SK), an evolution of Super Mouse 1, more powerful, but more complex. The main features are: - 250W carrier power, 1kW PEP (or more!) - Operation in 40 and 80 meters, covering the entire band; - Power supply 110 / 220v; - More spacious box with more commercial radio features - Printed circuit boards that can be made at home; - Less use of SMD components. The texts are in Portuguese Brazil, if you do not know the language I use google translator. Transmissor Super Mouse 2 (SM2) - 250W carrier power, 1kW PEP www.813am.qsl.br/index.php?option=com_content&view=article&id=442:super-mouse-2&catid=47:coluna-py2ko&Itemid=79 Transmissor Super Mouse 1 (SM1) - 100W carrier power, 400W PEP www.813am.qsl.br/index.php?option=com_content&view=article&id=396:super-mouse&catid=47&Itemid=79

16 like very nice sharing

Nice project ..I am searching these type of project from last many days ..Hi this is VU3 YWB Ham Radio operator From India. could you show how its work actually. and where to buy these components?

Bob, I just built your am transmitter and it works very well. I made a couple of changes , one was the oscillator section caps to get exactly 1030 KHZ, and the other modification was the emitter resistor on the RF Amp from 22 to 100 ohms to reduce the transistor current draw because the transistor would get hot to the touch. I got this idea from a commenter in regards to Don's transmitter.

Hi Bob , my old signal tracer, is long in the tooth, so I'm going to have a go at this one, thank you for sorting out the bugs. Paul de M0BSW

Great deal and it is working awesome 👏 have a great day

where can i get that pcb, Robert? Looks great for my am project.

have a nice day and god bless your prayer 👍👍👍👍👍👍 I am enjoy staying here, don't forget to visit in my channel is #SMWChanel thank you........

How can a germanium diode have a forward voltage drop of 2.8 to 2.9 volts at any reasonable current?

Thanks Bob, Don forwarded this to me. I've been noting my diodes don't perform consistently in my project. That is some do, some don't. We need a "magic box" that will identify diodes!!

Interesting Bob..I've been messing around with some probes designed for use with a guitar amp and none of them seem to work quite like I want them to..I'm fairly new to electronics so not sure if it's something I'm doing wrong or the design itself..Any chance you guys will be offering the BDST for sale to people outside of the USA and if so do you know what the price will be?

What is the power limit (watts.....milliwatts?) we can legally transmit on an AM transmitter?