[GreenKeys] 28 ASR TD base (LCXB) isolation parts

[John, W9DDD]

Thanks Nick and TT,

I think I see how you could adjust the height higher, but not lower with 
the 164101 stud.  I was never able to locate a adjustments for the LCXB 
when mounted on the cabinet rails. The holes in the base of the LCXB are 
a fair amount larger than the 1/4-32 screw that holds it down, so 
there's wiggle room that I thought they would have addressed in the 
adjustments.

I see that the 84354 spacer is 0.095", which is pretty close to the 
3/32" Nick mentions.  This the spacer used if putting an aux. 
reperforator on a base that doesn't have the isolation parts.

I hadn't noticed in any of the literature where they added spaces under 
the LAK deck.  So no part numbers or pictures.  Are they plates that run 
the length or 8 individual spacers at the 8 locations where screws go 
through?  Might be a specification I haven't found. Another trip through 
the various parts books.

The rubber parts I have are NOS, but it's actually kind of hard to 
evaluate stiffness due to the small size.  So maybe mine are OK.

John, W9DDD

On 8/22/2020 6:34 AM, Nick England wrote:
> Paul has NOS rubber parts that feel very pliable. Old used ones can be 
> brittle.
> Part of the mod is to add spacers (3/32?) between the rails and the LAK 
> deck to bring the shafts into alignment.
> Is it worth doing? No idea as the two ASRs I have restored already had 
> it done.
> Nick
> 
> On Sat, Aug 22, 2020 at 12:17 AM John, W9DDD <w9ddd at tapr.org 
> <mailto:w9ddd at tapr.org>> wrote:
> 
>     So my 28 ASR arrived with the TD base bolted directly to the rails.
> 
> 
> 
>     I've discovered that I have the parts necessary to add the base
> 
>     isolation "feature".
> 
> 
> 
>     1. Is it worth changing out those parts?  Do it reduce noise or
> 
>     vibration?  The rubber parts are 50 years or more old, so they may be
> 
>     too hard to do any good?
> 
> 
> 
>     2. This would raise the base slightly.  Is this an issue with the drive
> 
>     shaft alignment?
> 
> 
> 
>     3. What would be a safe lubricant to use to get the rubber washers to
> 
>     slide onto the stud easier?
> 
> 
> 
>     The parts involved can be observed on page 2 of
> 
>     http://www.navy-radio.com/manuals/tty/573-128-800-7008.pdf
> 
>     top of page (unless you rotated it) stud 164101 and associated parts.
> 
> 
> 
>     -- 
> 
>     John, W9DDD
> 
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