330 A/BP tig high frequency

[migweldermike]

i am trying to find the capacitor part #059417 but they tell me they don't make it any more any idea where i can find 2 of them

[H80N]

Try looking here...........

See Page 39 of this PDF.... HF Assy Item #208.... looks like what you are looking for....

https://www.millerwelds.com/files/ow.../O340C_MIL.pdf

[H80N]

You will need to plug in your serial number and download the manual....

here...

https://www.millerwelds.com/support/manuals-and-parts

.

[migweldermike]

where are the mica capacitors

[Prof100]

Isolating capacitors to check for a bad one for HF problem

Ok, I isolated each one of the "mica capacitors" and the HF works with one but not the other. So I'll replace both and let you know how it works. Yes I could always scratch it but I wanted the HF to work for aluminum. Thanks again for all the help. What a great source of information.

I have the same machine and it requires striking an arc. I have the machine since 1992 and use it sporadically. How did isolate each one of mica capacitors to determine which one was bad?

Thanks.

Bill

[H80N]

Ok I got 2 new capacitors from miller4less, I called Miller tech to be sure new numbers would cross referance. I installed them and now HF works. It's still slow to start, lag time between pedal and torch, but it works. Thanks for all the help.

Glad to hear that you are up and running again..

[FNG]

Ok I got 2 new capacitors from miller4less, I called Miller tech to be sure new numbers would cross referance. I installed them and now HF works. It's still slow to start, lag time between pedal and torch, but it works. Thanks for all the help.

[H80N]

Ok, I isolated each one of the "mica capacitors" and the HF works with one but not the other. So I'll replace both and let you know how it works. Yes I could always scratch it but I wanted the HF to work for aluminum. Thanks again for all the help. What a great source of information.

COOL... !! .. PLS Keep us Posted....

[FNG]

Ok, I isolated each one of the "mica capacitors" and the HF works with one but not the other. So I'll replace both and let you know how it works. Yes I could always scratch it but I wanted the HF to work for aluminum. Thanks again for all the help. What a great source of information.

[FNG]

Thanks Cruizer and H80N. I will try that. Earlier I checked the HF intensity with an ohms meter, it shows some wear but it increases and decreases when you go from high to low. I had a busy day today so maybe tomorrow.

[cruizer]

Does the torch scratch start, or do you depend on the hf for starts? Might just be that the conduit inside the torch is hooped, also .008 which is recommended by some to my point of view is kinda tight. I gap em to 012. Way better starts, least wise for the transformer machines.

[H80N]

Thanks for the link. I have spark at the gaps, but tomorrow I will try to isolate one capacitor or the other to check for failure. I took off both side panels, blew out some crud. At night in the dark, didn't see any arcing except at the spark gaps. Should the arcing be obvious? Any ideas where to consentrate my search?

Have you tried turning up the high frequency intensity control??

you should hear the HF buzz get louder (and brighter between the gaps) as you turn it up..

[FNG]

Thanks for the link. I have spark at the gaps, but tomorrow I will try to isolate one capacitor or the other to check for failure. I took off both side panels, blew out some crud. At night in the dark, didn't see any arcing except at the spark gaps. Should the arcing be obvious? Any ideas where to consentrate my search?

[H80N]

Thanks Cruizer, I took off the side panel and tried that and didn't see any arcing or signs of bridging. I will try again tonite.

This is a pretty common problem on these old machines... they live for decades in a dirty environment with a lot of conductive metal dust to foul up the works...

here is an old thread on the same problem.. that you may find useful..

http://www.millerwelds.com/resources/communities/mboard/showthread.php?32519-Miller-330-A-BP-won-t-strike-arc-without-dragging-tungsten-on-work&highlight=corona

[FNG]

Thanks Cruizer, I took off the side panel and tried that and didn't see any arcing or signs of bridging. I will try again tonite.