[GreenKeys] M28 RT & LAXD

[Duncan Brown]

John W9DDD,

The heat gun did the trick of freeing up the sliding gears on the gear 
shift on the M28RT!

I probably should have taken the gear shift all apart and given it a 
good cleaning, but I just put some oil on the sliding surfaces, moved 
them back & forth and then removed the dirty oil. Did that a couple of 
times and  then did the final lube.  Hope that will keep the gears free 
for awhile.

Thanks,

Duncan


On 05-Jan-22 19:37, John W9DDD wrote:
> Hi Duncan,
>
>
> I've been told by a pretty reliable source that using a heat gun or hair dryer can loose up stuck parts if you talking lubricant that has gone sticky.
>
>
> John, W9DDD
>
>
>> On Jan 5, 2022, at 5:05 PM, Duncan Brown <duncanancy at earthlink.net> wrote:
>>
>> Finally got the 48VDC supply (thanks Nick!) wired in and all the jumpers wired on to the 32 pin LAXD1 plug.  Installed a small toggle sw in the 32 pin plug cover to control the tape clutch magnet. Can punch tape at 200wpm and read it at 100wpm now!
>>
>> three problems remaining:
>>
>> 1. In rewiring the 32 pin plug, pin 2 (data bit 5) broke off, so I'll have to jumper it on the bottom of the receptacle.
>>
>> 2.  When I run the LAXD1 tape reader with no tape in it (holding down tape-out pin), it transmits "K" (11110) which is understandable since 5th bit is open on the 32 pin plug.  Running a blank tape, it transmits "N" (00110) which says bits 3 & 4 (cant tell about 5) are stuck on.  I'm not familiar with any of the M28 tape readers and the LAXD manual (251B) is not clear on what happens between the pins that read the tape and the distributor.  I am going to have to pull the LAXD to see what is going on under there. In the meantime, is there any other manual that shows what is supposed to be happening on the bottom of the LAXD with the data pins?
>>
>> 3.  The LRXB base has a three speed gear shift for the LAXD: 75, 100, & 60WPM. It is stuck on 100wpm (middle position).  I loosed the screws on the "keybar" and the keybar moves, but I can't get the gears to move in either direction.  It looks like the only way to remove the "Shift Gear Assembly Shaft" is to have the gears slide off of it, but they seem stuck. I didn't want to put penetrating oil in between the gears and the shaft without being able to remove it after I get the gears loose. But maybe I shouldn't worry about the penetrating oil?  Any ideas?
>>
>> Thanks,
>>
>> Duncan
>> K2OEQ
>>
>>
>>
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to w9ddd at tapr.org