[Curious Marc]

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 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.
>>>>>> 
>>>>>> 
>> 
>>