Jeff, any lab bench today should be capable of handling smd components. There are thousands of videos on YouTube on how to do it, and what tools to use; spend a few hours searching around. Dave Jones at EEVBlog <https://www.youtube.com/channel/UC2DjFE7Xf11URZqWBigcVOQ>has done several good ones. So have Peter at TRX Bench <https://www.youtube.com/user/TRXBench> and Mike at MikesRadioRepair <https://www.youtube.com/channel/UCfi5fp3qsXeqSbsLAIKU6Dw>. Doesn't need to cost much. I'm a tight-wad and here's what I use on my bench to handle almost any smd work:
First you need good light and magnification, and you might already have these. I use a bench-mounted fluorescent light w/ good built-in magnifying glass, and a Pro'sKit MA-016 <https://www.amazon.com/Eclipse-MA-016-Personal-Magnifier/dp/B00OSL8VRQ> headband. I even have a $12 decent Chinese Daniu USB Digital Microscope, which I hardly use because the glasses and my smartphone usually suffice. Then, you need a hot air tool, tweezers and polyimide film tape. See Dave review the Atten 858D hot air tool <https://youtu.be/vva2t21sOAs>. My eBay $30 YouYue 858D knock-off is probably from the same factory. With that hot air, you'll need a set of good tweezers and polyimide film tape. Don't scrimp on these last two - pay a little more for good quality sturdy stainless static free tweezers made for working with smd, and get real Kapton brand tape from 3M or other reputable manufacturer (some Chinese crap is sold as Kapton, but is not). Finally, you need the correct soldering iron tip for what you're working. My ancient Weller TC202 <https://www.ebay.com/p/1401549232?iid=274352711831> has no temp control, but works fine because I have a collection of tips for it. Your current pencil may suffice if you use the correct tips and technique. Good Luck. Gus, KG5OFB On Thu, May 14, 2020 at 11:43 PM Steve Agee via BVARC <[email protected]> wrote: > > > > *You can get hot tweezers which are have heating elements in the tips. > These are best for SMD with one solder pad on each end such as capacitors > and resistors. N5ZUA * > On 5/14/2020 1:28 PM, Jeff Town via BVARC wrote: > > Hello all, > > I am trying to remove and replace several Surface mtd Resistors in an old > FT-100 Transceiver. I managed to remove a defective SMD Diode, and suspect > several of the resistors have drifted over the years, and probably also > need to be replaced. I have tried on those resistors with the solder iron > I have, but its just not fine/precise enough for this. [unless i get > really lucky in my attempts.] [they are about 1mm x 2mm, pretty small]. > > Why, trying to save $, dont have enough for a new radio any time soon. > Repairs in a shop would cost me more than a new radio. I am just hopeing > that someone in the club has, or knows someone, better solder equipment > that i could use. > > FYI, Before I disassembled it, the radio did recieve, and the VHF > transmitter worked at low power. The replacements I am trying to do are > from internet reports from others who have repaired radios with the same > symptoms on the PA board, so i'm only partially convinced even this will > get it working. but its the best chance I can find. I'm not really an > expert in this. > > I have planned to remove and verify that the resistors need replacement, > order the replacements from mouser, and then install/solder them and > re-assemble the radio; with a little luck i'd then have a HF radio to use. > So, Please let me know if someone has some of this precision soldering > equipment that i could use for a little bit. > > 73 > Jeff Town, KI5HNY > Channelview area > [email protected] > 832-216-0980 > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing > [email protected]http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >
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