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Messages - JimIO

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The RF Workbench / Re: Stretchyman 40w GaN TX is sick
« on: October 04, 2019, 1752 UTC »

 ...and I've got my own conspiracy theories about you and your extraordinary repair policy, so there.   ;)

Here's a nice video of the method I used to test the mosfet with my multimeter:

Gotta love (not) the stand w trump and epoch times ads you get when you click that link.    8)


Huh? / Re: If anyone is looking for a radio show idea...
« on: October 03, 2019, 2258 UTC »
What's a fb?

The RF Workbench / Re: Stretchyman 40w GaN TX is sick
« on: October 03, 2019, 2038 UTC »
I worked for years troubleshooting SMPS's. You have to replace all of the bad components before you power it up. Sending it back to the guy who designed and built it is a no brainer.

Huh? / Re: Ready for a solar minimum winter?
« on: October 02, 2019, 0215 UTC »
Maybe the coming Civil War 2.0 will go nukyaler.    8)


For Sale / Wanted / Barter / Re: Wanted TPA3116D2 Amplifiers
« on: September 30, 2019, 1842 UTC »
Hi Stretchyman, a little off topic but I'm curious how you connect the stereo BTL amp to the mod transformer. I've got a 25+25 watt Bluetooth module that I'm thinking about using. Do you have two primaries and connect one from L+ to R- and the other from R+ to L-? That's what I've been thinking about doing but I'm not sure it will work.


"I've been down that road many times and have not found anything close to
what I'm looking for.  If your so sure its out there, you could bring a link.


Sorry for the delayed response, isp problem.
Why do you want to use RS232, for remote control?
Why not a lcd 1602 keypad shield?
What aduino and dsp are you going to use?
I have some uno clones and prototype boards and a ad9830
and ad9850 module that I got for something like this.
I'd like to be part of the project.

People have done that, search 'arduino ad9850'.
If you want to start from scratch search 'arduino serial.begin(9600)'.

Heard again last night, earlier and louder but soon faded under the Springfield and Hudson TIS stations. Instrumental music with lots of low end. Long pauses between tracks and long fade in fade outs.

North American MW Pirate Radio / UNID 1710 AM 2345 UTC 21 Aug 2019
« on: August 21, 2019, 0405 UTC »
Heard/seen something when using the RTL-SDR v3 for the first time in a year or two.
Weak to fair on some KIWI's in the NE. House music?
Still going at 0405 UTC.

Propagation / Re: Attention Propagation Nerds
« on: August 15, 2019, 1902 UTC »
"As opposed to those who have  been around for 20 years and are already brain dead ?"

They have a name: YRNF    8)

Huh? / Lightning strikes 300 miles from the North Pole
« on: August 15, 2019, 1743 UTC »
I heard about this last night. I'm not gonna post a link.
You can do a seach and read about it from a source you trust.    8)

Equipment / Re: Inexpensive VNA
« on: August 15, 2019, 0028 UTC »
I think I'll get me one when I can run it on a Linux PC. Not too long I hope.

Equipment / Re: Filters For Dummies
« on: August 14, 2019, 2358 UTC »
You're supposed to say: "I'm just asking for a friend".    8)
There's little to no benefit filtering before the amp. You don't say what you got. What makes you think you need to add a filter? If you do then look for a 5 or 7 pole FM low pass filter that will handle whatever power the amp is.

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