ipa as in beer? On Sat, Jan 27, 2018 at 12:17 PM, Carl Claunch via cctech < cctech at classiccmp.org> wrote: oxide in erase doesn?t after cleaners

Isopropyl alcohol. Not very good for drinking; even store-brand vodka in plastic jugs is less harsh. :)

Isopropyl alcohol would be a sensible guess, I've not seen that abbreviation before though . - H On Sat, Jan 27, 2018, 18:24 Adrian Stoness via cctech <cctech at classiccmp.org> wrote: > ipa as in beer? > > On Sat, Jan 27, 2018 at 12:17 PM, Carl Claunch via cctech < > cctech at classiccmp.org> wrote: > >> The IPA is heated to 60C before the ultrasound is able to remove the > oxide >> remnants, FWIW. >> >> While we can often get the entire smooth surface of the head clean with >> swabs and IPA, it is very difficult to clean all the material that forms > in >> the cruciform trench recessed into the head (where the read/write and > erase >> coil poles are visible). >> >> Heads can seem clean to the naked eye, but a good stereo microscope will >> insure that you have a clean and smooth surface. >> >> Regards, >> Carl >> >> Date: Fri, 26 Jan 2018 12:15:34 -0800 >>> From: Fritz Mueller <fritzm at fritzm.org> >>> To: "General Discussion: On-Topic and Off-Topic Posts" >>> <cctalk at classiccmp.org> >>> Subject: ultrasonic cleaning for disk heads >>> Message-ID: <9F2C2AC7-1B35-46F5-BD92-CC3DFD29FBFA at fritzm.org> >>> Content-Type: text/plain; charset=utf-8 >>> >>> I watched with great interest one of curiousmarc?s recent Alto videos, >>> wherein they clean a Diablo drive head ultrasonically. I?ve been >>> struggling a bit with my restored RK05 drives to completely clean the >> heads >>> after minor head crashes. Not being able to get them really sparkling >>> clean makes me always worried about running the drives for more than a >> few >>> minutes at a time, and a little nervous every time I spin them up?. >>> Scrubbing and scrubbing and scrubbing with IPA and kimwipes just > doesn?t >>> seem to get all the crud off. >>> >>> I do have an alignment pack that I could use to re-align the heads > after >>> removing them for a proper cleaning this way. Decent ultrasonic > cleaners >>> aren?t terribly expensive and might be nice to have around the shop >> anyway >>> (I could also do all my eyeglasses :-) >>> >>> In the video, the heads are submerged in IPA in a glass cylinder, which >> is >>> then placed in the ultrasonic bath. >>> >>> Has anybody on the list here done this and have tips/advice beyond what >>> can be seen in the video? It looked very effective! I?m also having a >>> little trouble sourcing the squat form glass graduated cylinder online. >>> >>> cheers, >>> ?FritzM. >>> >>>

On Jan 27, 2018, at 5:26 PM, Adrian Stoness via cctalk <cctalk at classiccmp.org> wrote: yea ipa's are to bitter have u had a saison though? On Sat, Jan 27, 2018 at 6:38 PM, dwight via cctalk <cctalk at classiccmp.org> wrote: > I don't like most IPAs. I do like lagers and most ale's like Sierra > Nevada's. > > Dwight > > > ________________________________ > From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Paul Berger via > cctalk <cctalk at classiccmp.org> > Sent: Saturday, January 27, 2018 12:54:59 PM > To: Henry Bond via cctalk > Subject: Re: > > Yeah for me IPA=India Pale Ale > > >> On 2018-01-27 2:45 PM, Henry Bond via cctalk wrote: >> Isopropyl alcohol would be a sensible guess, I've not seen that >> abbreviation before though . >> >> - H >> >> On Sat, Jan 27, 2018, 18:24 Adrian Stoness via cctech < > cctech at classiccmp.org> >> wrote: >> >>> ipa as in beer? >>> >>> On Sat, Jan 27, 2018 at 12:17 PM, Carl Claunch via cctech < >>> cctech at classiccmp.org> wrote: >>> >>>> The IPA is heated to 60C before the ultrasound is able to remove the >>> oxide >>>> remnants, FWIW. >>>> >>>> While we can often get the entire smooth surface of the head clean with >>>> swabs and IPA, it is very difficult to clean all the material that > forms >>> in >>>> the cruciform trench recessed into the head (where the read/write and >>> erase >>>> coil poles are visible). >>>> >>>> Heads can seem clean to the naked eye, but a good stereo microscope > will >>>> insure that you have a clean and smooth surface. >>>> >>>> Regards, >>>> Carl >>>> >>>> Date: Fri, 26 Jan 2018 12:15:34 -0800 >>>>> From: Fritz Mueller <fritzm at fritzm.org> >>>>> To: "General Discussion: On-Topic and Off-Topic Posts" >>>>> <cctalk at classiccmp.org> >>>>> Subject: ultrasonic cleaning for disk heads >>>>> Message-ID: <9F2C2AC7-1B35-46F5-BD92-CC3DFD29FBFA at fritzm.org> >>>>> Content-Type: text/plain; charset=utf-8 >>>>> >>>>> I watched with great interest one of curiousmarc?s recent Alto videos, >>>>> wherein they clean a Diablo drive head ultrasonically. I?ve been >>>>> struggling a bit with my restored RK05 drives to completely clean the >>>> heads >>>>> after minor head crashes. Not being able to get them really sparkling >>>>> clean makes me always worried about running the drives for more than a >>>> few >>>>> minutes at a time, and a little nervous every time I spin them up?. >>>>> Scrubbing and scrubbing and scrubbing with IPA and kimwipes just >>> doesn?t >>>>> seem to get all the crud off. >>>>> >>>>> I do have an alignment pack that I could use to re-align the heads >>> after >>>>> removing them for a proper cleaning this way. Decent ultrasonic >>> cleaners >>>>> aren?t terribly expensive and might be nice to have around the shop >>>> anyway >>>>> (I could also do all my eyeglasses :-) >>>>> >>>>> In the video, the heads are submerged in IPA in a glass cylinder, > which >>>> is >>>>> then placed in the ultrasonic bath. >>>>> >>>>> Has anybody on the list here done this and have tips/advice beyond > what >>>>> can be seen in the video? It looked very effective! I?m also having > a >>>>> little trouble sourcing the squat form glass graduated cylinder > online. >>>>> >>>>> cheers, >>>>> ?FritzM. >>>>> >>>>> > >

Next video: cleaning heads in fragly brewed IPA (the beer). I bet it would work too. Ultrasound in hot solvent cleans stuff that no other method can. Marc >>>> ...On Sat, Jan 27, 2018 at 12:17 PM, Carl Claunch via cctech < >>>> cctech at classiccmp.org> wrote: >>>> >>>>> The IPA is heated to 60C before the ultrasound is able to remove the >>>> oxide >>>>> remnants, FWIW.