Electronics Forum: hard (Page 1 of 177)

Soldering to hard gold

Electronics Forum | Thu May 02 09:33:30 EDT 2013 | 15009

Looking for advice on soldering lead free paste to a board with very heavy gold plating. I have learned from the Customer that this is HARD GOLD and that it is 10-20 Micro Inches Hard Gold over 100 Micro inches of Nickel. When we reflowed the solde

Testing for hard gold

Electronics Forum | Wed Jul 31 18:26:09 EDT 2013 | Jeff Kennedy

You might consider to contact a lab to Run a microindenter against a know good soft gold sample. The knoop value for the soft gold will be much lower than for hard gold. This would be reflected in the diameter measurement of the indented samples.Smal

Testing for hard gold

Electronics Forum | Wed Jul 31 13:19:38 EDT 2013 | anvil1021

Does anyone know how to test for hard gold on a PCB? We are in a challenging situation with a PCB provider and we need some objective evidence other than wire bond failure to present to them. Any comments could help ....Thank you Anvil

JUKI KE-2050/60RL hard drive

Electronics Forum | Fri Dec 04 12:00:07 EST 2020 | jandon

Has anyone successfully replaced JUKI KE-2050/60RL HDD with the SSD hard drive?

Soldering to hard gold

Electronics Forum | Fri May 03 16:06:44 EDT 2013 | hegemon

To be short, no change in profile is going to get you through this. As I recall the point of hard gold is to retard the wetting process, so no surprise here. For example a connector might have hard gold plating at the mating surface, but not at t

Soldering to hard gold

Electronics Forum | Mon May 20 15:43:01 EDT 2013 | ngotranbestek

Hi I meet problem by PCB with diameter 300cm and thick 6mm i used tin-lead with profile normal, soak time 60-90 sec, Temp peak is 220 degree C, But solder see not good, not shiny. Any body recomend help me to fix this problem for Hard gold playing.

Soldering to hard gold

Electronics Forum | Fri May 24 09:16:36 EDT 2013 | grahamcooper22

you need to reduce your time above liquidus to as low as you can...maybe 10~30 secs to allow the solder to wet to the gold but minimise the amount of gold that is dissolved into the solder joint...try also reducing the peak temp to 200~210 deg C. Thi

Soldering to hard gold

Electronics Forum | Mon May 06 12:20:09 EDT 2013 | davef

Gold in solder alloys can be brittle. We always used to talk about keeping gold LT 3% in order to avoid embrittlement. Some military contracts require removal of gold from soldered contacts. Adding gold to a solder alloy that you're familiar with wi

Backup a OS/2 GSM hard drive?

Electronics Forum | Tue Dec 15 11:14:40 EST 2015 | ilavu

You can create backup image of your entire hard drive using Acronis TrueImage or ghost. I use acronis and never had any problem. As for the hard drive size, "YOU DON"T HAVE TO BUY OLD USED HARD DRIVE". Size of the new hard drive does not matter if yo

and you think youve got it hard

Electronics Forum | Thu Jul 13 12:33:21 EDT 2006 | machine designer

And soon enough all of those management types who don't understand production will have sub'ed out our work and be saying to themselves... see that wasn't so hard was it?

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