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I'm using one of the 12V outputs from an ATX power supply that literally came from the dump.? I was dropping off the garbage and noticed an old PC lying on the ground.? The power supply and CPU

Perfect time to get that Nickel spray and spray it around the shack so the solar winds don’t fry the front end of our xbitx’s. Joe

I understand that heat's bad.? I'll have to try different tips as I usually use a fine tip.? I usually dial back to about 600 °F when soldering SMD.? I have a couple of recent successes

Hi Allison, In other words we really can't put 10 pounds of balogna in a one pound sack. 73, Bill KU8H -- bark less - wag more

I had to read that twice. The first time I read it I thought you said your PES51 had a tip bent on a 90 degree angle! Vince - K8ZW.

What did you use for the 1uF cap?

I have to ask what does that have to do with a metal or plastic cased radio? We have been going though varying streams of solar wind for a long time and at most we get geomagnetic storms and the bands

On Sat, Nov 24, 2018 at 11:08 AM, Gwen Patton wrote: This is the spray I used:?https://www.amazon.com/gp/product/B01N3AWGNX Yes MG chemical super shield (spray nickel flake).? I've used it for

Seriously poor choice for battery. It will be a short and very unhappy life for those cells.?? I'd consider 8 AA cells undersized!? On RX its around 150ma and TX??over 450ma and peaks to 2.5A

Andyh, The most common problem is a very hot iron and a pointy sharp tip. The very small tip often means running higher heat so it can heat larger joints but one hot they maybe too hot.? Also the

No doubt that there are plenty of failure modes.? What threw me here is that I don't re-work or re-use SMD - the parts go away.? As I've broken end caps from resistors and caps, I probe the

For sure, SMD parts are not tolerant of PCB flexing.? Be sure when handling, mounting, placing in a vise, etc. that you you do not bow or twist the board in any way.? It should always be kept

Those surface mount caps and resistors are easy to mechanically fracture. Flexing the board or excessive thermal gradients could do it. Pressing at it with meter probes can momentarily fix the

Was not aware of the Sunday schedule. Tried at 2:28 PM Central, did not hear anyone. Is there a time? Evan AC9TU

Has anyone been trying for a bitx> bitx qso recently on 7.277 I made quite a few contacts in the spring but don't see any action there recently. 73 Dave k0mbt

Thanks for the confirmation, Allison. ? ?When I removed (almost) all of the parts from the board for the pre-driver, I checked R961.? Since it measured the desired 2.2 Ω I left it.? Everything

AndyH, Allison - is the 5V at the collectors reasonable?? If so, is it time to replace R92 and R95 with pots and adjust until it works? No.? NEarly all of the collectors from Q90 on are connected to

Rich,? FWIW - That is the error I received (using windows) after my Nano got fried.? Would connect, but data transfers failed. Good Luck! Woody ? KZ4AK

These data are for the pre-driver.? 13.8V input.? Everything in the amp has been replaced except for R961, the 2R2 at the TX input.? When the amp was cleared to the bare board, R961 measured 2.2Ω

This is still kicking my butt.? I have been completely rebuilding the stages from scratch.? All parts removed, traces checked, then all parts replaced with new.? Q90, the pre-driver, and the final