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Dear OM, when we increase the voltage, proportionally current has to be increased, so as to maintain output impedence. Hence at 24v, current should be 2A. such voltage and current will produce lot

I am not sure if it has been stated or not, but the SMD trainer with the LED's is available on eBay, starting under $2.00 (depending how fast you want it). Comes with all SMD parts, you provide the

I did insulate them... no continuity between tab and screw. I check both... i din’t know what happened but as soon as i separated the fers from the box chasis it was fine

So, you think the finals are fine? The radio turns on and receives... but I see no output on the external power meter... though i hear myself on a nearby radio

Hmmmm, if the IF is at 45mhz, won't operating above that invert the sidebands? Easy enough to compensate for in the raduino I suppose. Just a thought.? -- Ryan Flowers - W7RLF MiscDotGeek.com (

Farhan, and others... The old stripline PCB technique also works well. Just scribe through the copper on 0.1 inch centers to make horizontal copper lines. Then break these lines with a scriber as

I learned from an accidental grounding on my Bitx40 that pcb traces make hard to replace fuses. ??? Bob?? KD8CGH

Measures 8.7 by 17 by 2.8- inches https://www.ebay.com/itm/Kikkerland-CU211RD-Radio-Tin-Lunch-Box-Red/282821302901?hash=item41d9769a75:g:HCQAAOSw38BaaL1c

John linked to this a few posts back.?https://play.google.com/store/apps/details?id=com.keuwl.functiongenerator ( https://play.google.com/store/apps/details?id=com.keuwl.functiongenerator ) I use the

How about from your android or iPhone?

Just received my aluminum housing from a Thai eBay vendor: https://ae5x.blogspot.com/2018/01/case-for-ubitx-arrives-from-thailand.html -- John AE5X

Well that definitely is the power requirement for the Yaesu but I was running my bitX40 On a computer power supply that I tweaked to 13.8 V And it was running fine, no issues. I even was doing digital

The tab of the pa transistors is live you need to insulate them from the chassis look for burnt copper tracks chris

I’m sure PCB manufacturing houses have improved a great deal, but in the Bay Area where you’d think no problem we found the best terrible. So many defective boards. Parts were often difficult to

Good to know your Yaesu is fine with 13.8v. Unfortunately, R141 on a stock Bitx40v3 is not.

Hello Ashhar, VU2ESE, I really like the technique you have described for working with SMDs. It reminds me of Chuck Adam's (K7QO) MUPPET (Manhattan Ugly Professional Placement Experimental Technique)

now, with finals away from the metal chasis I am testing if I have output. The power meter and needle doesn’t move at all. I do get about 1,3amp drain when ptt and i can hear myself on other radio

There should be some tolerance like 10% +/- on the voltage applied that shouldn’t hurt or hinder it. My Yaesu takes 13.8v by t 12v on the line works just as well Joe KD2NFC Sent from my

Hello Jack, W8TEE, The Revolving LED SMD Practice Kit was my introduction to soldering SMDs. So it was also my introduction to a Solder Paste Syringe, and application needles. I have a heavy thumb

Many here run it at 13v and more. But at 12v R141 is already cooking, over its 1/4W rating. Q13 is also running hot. Going above 12v makes it worse. Several reports of having R141 open up, if it