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Having a hot air gun available for tighter pitch work is important. Spark fun has an old multi page tutorial on SMD work located at https://www.sparkfun.com/tutorials/category/2 . Is it possible to

Hi, i have think if there come some tones to the input of TDA2822 on a frequency we could not hear, 20 KHz or perhaps a lower, with much higher power, than the normal wanted sound. That could burn the

Crystal ladder filters tend to have a steeper skirt on the upper freq side than on the lower freq side as Tim suggests. See fig 3

I've used that embossing heat gun for a couple of years with soldering paste and it works well. Day to day use is mostly heat shrink tubing. Good value for the price. Roy WA0YMH [email protected]>

I think I could be quite happy with a $20 pencil iron for SMD work. A temperature control knob is not important, though having one suggests it has a thermostat which is important. Otherwise you will

Thanks Ron for the info. Here the audio circuit is finally ok, everything tested and working. But ubitx continues with output level on the speaker very low. I have to increase the volume at maximum

Can't resist this story: I was at my rather remote shack in Alaska with limited tools.? The brand-new ICOM mic for my old 725 had a bad connection in the PTT circuit.? Of course I took it apart to

It's HEREordered Feb 11received Mar 16 Fantastic! This is exciting news - I ordered mine on 2/19. As for the 2822 chips, I've decided to put a regulator in their B+? line before ever powering them

My finals blew due to a bad load and testing out the PA on higher voltage supply. My own fault here. -- ---------- N5WLF, Greggory (or my nickname, Ghericoan) General Class, Digital Radio Hobbyist

I keep seeing that many people seem to be having problems with the IRF510's in their uBITX radios, but that hasn't been my experience here at all. I have 3 uBITX's, one from each of the first 3

Hi Tim, The TDA2822M's I got from Gateway Electronics had SSS 88737 no FCI or WX.? The sales person said this was a manufacture date code?of 1988. He stated that these IC's must be better than the

Had some computer problems and the earlier files were corrupted. Only way to correct them is delete the file and re-upload them -- sorry for the confusion. New computer on-line now and the old one

It seems that just blindly replacing blown IRF510 devices with more IRF510's is an exercise in treating the symptom instead of fixing the problem. There are many ideas and myths about why the IRF510

I have now gotten this message 4 times.?? What is going on? Ron W7HD

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* ubitx_I2C4L_V3_00R.zip *Uploaded By:* Jim

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* ubitx_I2C2L_V3_00R.zip *Uploaded By:* Jim

Nothing tongue in cheek about it. Jerry outlined his progression based on the task at hand. I just added one extra step that I use in that same progression - from a temp controlled pencil to a

Thats true, Farhan is correct that is the most important factor. Keeping the tip clean and tinned, as well as having the tip be quality is in my experience as well the most important as well. I

Thank you Joel, I just placed an order. Yes, I saw the wonderful design and simple way to have everything attached and secure. Thanks again for your help and kindness. 73, Jeff K9JP -- Not all

When mine blew it took R75 out at the same time.? You might check surrounding components under magnification.