[BC] Harris HT3.5 tuning issue

[Milton Holladay]

Just replace those universals with a good porcelain type (if they are 
essentially straight in line)  and shorten the shaft as needed.  There 
are also small universals with a porcelain block in the center that 
would work with fairly good angles--up to 45 degrees, I suspect. ( RCA 
used them in their last BTF-3E model, but I don't know who made 
them--maybe National).........
I've made perfect replacements for the copper clamp that grasps the back 
of the vacuum variable loading capacitor......
Many verniers will slip if they are trying to turn something that is too 
hard to turn.....
M

On 6/11/2012 16:27: Craig Bowman wrote:
> I have two of them with a broken universal joint where it connects at the side of the cavity.  I have emailed pictures of the part to Harris and they keep sending me the wrong one.
>
> Craig Bowman
> 989 277-8835
>
> On Jun 11, 2012, at 4:16 PM, "Thomas G. Osenkowsky"<tosenkowsky at prodigy.net>  wrote:
>
>> I've had considerable difficulty in obtaining the correct parts for FM3.5K
>> and FM5K cavities. There were a number of revisions and versions, hence
>> different physical sizes for the manufactured parts that Harris build
>> in-house. After a bad experience in St. Maarten, I shipped the parts I
>> needed exact replacements for to Harris with the intention of avoiding any
>> possible confusion regarding the exact dimensions, etc. They still got it
>> wrong :-(
>>
>> The binding can be anywhere from the FP knob assembly to the right angle
>> gear boxes to the threaded rod/contact bar. You really need two people to
>> see exactly where the problem(s) is. One non-technical person can be in from
>> turning the knob while you watch from the rear.
>>
>> Tom Osenkowsky, CPBE
-- Milton R. Holladay Jr. / miltron at att.net Columbia, S. C. / 
803-331-8059 RF Measurements / Planning & Installation / Emergency 
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