I don't understand the logic of buying this Chinese Hakko-knock-off de-solder gun. 1. The eBay price is US$122 plus shipping US$37, totaling nearly US$159. 2. But, the gun offered is for 220 vac so

I think that desolder gun has only one diaphragm in the vacuum pump while the Hakko has two diaphragms for higher vacuum. The "Chinese copy" may still work but its not a Hakko. Let us know how it

The AC motor that drives the GAST rotary vane pump uses a relay todisengage the the start winding. When this relay fails, the motor runs on the start winding, for a whileuntil the motor winding burns

Thanks for recommending that. Yes, I read the post where someone found corrosion on their hybrid contact pads... nothing on this one. Not even a hint of capacitor leakage in the usual spots. Too

Update: Newark has shipped the Lithium Chloride battery. They will ship the MSDS etc with it. Also, I have an updated excel sheet with quality caps for the A5 & A1 mainboards cross referenced to

Indeed and just after posting I saw the obvious; however, I neglected to mention that the generator can be offset to sweep from zero volts to some as yet undetermined maximum around 15 volts and I did

I'm at the 3rd attempt of 2 week period.... It's probably a very exclusive club and I don't seem to have the proper credentials....

I hope you have returned it by now. I managed to have a look at how the dimming circuit works. It's supposed to evaluate the intensity of the beam then chose a dimming time-out accordingly and

It seems that TekscopesArc/2 aren't accepting new members...2 weeks now and no approval for me.

??? What's a motor-run relay? and how does a current transformer /ssr replace these? Dave

Did u check the hybrid pis for corrosion? I read that could cause probs even if the hybrid is good.

2.5 volts across 1600 ohms is only about 1.6 milliamps. You have to exceed the peak point current to switch the tunnel diode on and then apply a current lower than the valley point current to switch

I dont quite see how you managed to exceed Ip with 1k and 2.5V. Could you explain what drive you adjusted? Until you exceed Ip, the TD is going to look like a low-ohm resistor. Ed

Thanks for the tip. Well, I hope it works, I just bought one. I struggle getting ecaps off PC mainboards with desoldering braid. This is a major purchase for me, so got my fingers crossed. Bob

I started with a solder sucker. Soon went to a Weller/Endico desolderingiron. I soon cut off the squeeze bulb and built a vacuum systemconsisting of a refrigerator compressor (used vacuum side), a

Don't forget to add the price of a 220V to 110V transformer. And the price of spare parts. The Hakko comes standard with a boatload of them.

Ebay No 250986032101 I will be purchasing this shortly.

Greetings: It is difficult to accept that all four tunnel diodes in my recently acquired 475 scope are shorted but that is what the I am seeing with a kludged curve tracer and DMM resistance check.

Are their question and subsequent actions asked/performed in good faith? Will they take "n/a" as a valid answer? Now seriously. I have no experience with them as a shipper, I don't live in US. I

It's a digital oscilloscope. It's just a scope.