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Posts by Big Elf

If you're buying 6-32 (or other UNC Screws) from the UK then I recommend Model Fixings I get all mine from them. I believe they ship to Poland.
I bought my Ethylene Glycol from a local Lab supplier in the UK. I use about 50ml per litre of distilled water. I just cleaned off the 'rust' from the fittings with a toothbrush and reused them. The underlying metal is brass so it's not a problem and it wasn't visible when in the loop. Flushing out the rads with tap water should be fine for getting rid of any small deposits. I would avoid using any acids including vinegar on the fittings, in fact I've stopped using it...
I had a similar thing a few years ago. I didn't really pin it down but I was using copper sulphate as well as the kill coil which might have caused the copper ions to transfer to the silver coil. I also had what appeared to be rust rather than copper deposits on shiny silver bitspower fittings. It's possible that they use(d) a layer of iron/steel with the nickel and chrome but again I never pinned down the exact cause. Since I started using benzalkonium chloride and...
abbb - Your crimps look inconsistent particulalry the wire crimp. The insulation crimp appears to be biting too deep into the insulation. Are the jaws in the Crimp Tool tightened up fully? They may need adjustment although the pin normally distorts or breaks if they do. Are you putting the pin in the tool as far as it will go so that the rear wings are butting up against the little 'notch' (where the wire crimp is made) on the tool? Have you tried pre-crimping the pins?...
The PWM D5 runs at 60% when not connected to PWM. What other components are in the loop?
The pins will have different markings on them although they are hard to read (with my dodgy eyesight I can't see them). I can tell you that the modDIY pins I tried some time ago were rubbish but they didn't have the long wings. Have you ever been able to successfully crimp pins with the tool. The test crimps that were supplied with the tool should indicate it was tested and produces perfect crimps. I'm really surprised with that wire diameter. I use 2.3mm and yours looks...
Is that 2mm wire strand diameter? The wire with insulation looks closer to 2.8-3.0mm. I've had another thought, are those Molex pins or copies? I've had problems with copy pins deforming in the past.
Unfortunately the photo isn't focused enough so I can't see what's happening to the crimp. I can see that the wire is very thick, what diameter is it? Also the wire isn't pushed into the pin enough, the insulation should be butting against the conductor (wire) crimp. The crimp pressure setting is normally at the lowest on the MDPC-X tool. Can you do some more photos of the crimp showing the problem and close ups of the tools' dies?
Either the wire you're using is too thick or your MDPC-X tool needs the dies adjusting.
If you're going to get an SN-28B rather than a decent too then it really needs modding to avoid crushing the wire. Although I modded my own Sleeve Modding sells one that's been adjusted to crimp better although I haven't tried it.
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