[Central-Electronics] 100V/200V tuning knobs

[George Maier]

You are correct on the torque Don, I've been down that road numerous times
and found the same correlation.  It seems that finger tight, or somewhere
close to that,  works about right

73, George - W1LSB

-----Original Message-----
From: central-electronics-bounces at mailman.qth.net
[mailto:central-electronics-bounces at mailman.qth.net] On Behalf Of Donald
Ball
Sent: Thursday, February 15, 2018 11:54 AM
To: Robert Sauvan
Cc: central-electronics at mailman.qth.net
Subject: Re: [Central-Electronics] 100V/200V tuning knobs

I am not sure if mine were exactly the same as I have no way of measuring
that. It seemed to be one of those things that you just "tweak" . I did
notice that it seems best when you loosen the screws just so that the dial
begins to slip, and then bring them in just enough to allow it to grab
throughout the band spread. I noticed that if they were too tight, that it
seemed to make the PTO jumpy.


Don
KE1MB

On Thu, Feb 15, 2018 at 11:32 AM, <rsauvan at beyondbb.com> wrote:

> Good idea. I will try that technique. Sounds like the best way to get 
> it right. I know for sure all 3 screws will need to be tightened the same.
>
>
> Thanks-Bob
>
>
>
> On 2018-02-15 09:02, Donald Ball wrote:
>
> Hi,
>
> I found that there is a torque value for those three screws that will 
> allow the PTO to spin freely without any heavy grease and just light 
> oil. I cannot tell you what that value is, but it is not that tight 
> from what I remember. I had to use an extension shaft and a small 
> knob, spinning the PTO while fine tuning those screws. You don't want 
> it too tight because it seems to make zero beating difficult. Once you 
> have it the rig performs very well and is not stressful at all to bring on
freq.
>
> Don
> KE1MB
>
> On Thu, Feb 15, 2018 at 10:35 AM, <rsauvan at beyondbb.com> wrote:
>
>> Thanks Don,
>>
>> I contacted Bob Sullivan and he confirmed for me that I did in fact 
>> have my assembly correct. After it is completely together and back in 
>> the radio with the knob, it should turn nicely. But, until I put it 
>> back in the radio, it does feel very stiff. I did put it together 
>> with some Lithium grease and yes it does make it easier to keep all of
the bearing intact.
>> Now, Im onto the PTO rebuild which is almost complete.
>>
>>
>> Thanks-Bob-W0YBS
>>
>>
>>
>> On 2018-02-15 06:45, Donald Ball wrote:
>>
>> Hi, I did this and there is a trick to it. I had to use a long spare 
>> shaft to hold the parts together while doing this. You will want to 
>> do this in a large bowl as it will come apart and bearings will fall 
>> out constantly. I also recommend some grease as it will help hold 
>> bearings in place.
>>
>> Don
>> KE1MB
>>
>> On Wed, Feb 14, 2018 at 9:18 PM, Robert Sauvan <rsauvan at beyondbb.com>
>> wrote:
>>
>>> Hi all,
>>>
>>> I am in the process of refurbishing a 100V along with the PTO. While 
>>> waiting for my new bearings to arrive for the PTO, I  needed to take 
>>> the tuning knob assembly apart. I cleaned it all up and greased the 
>>> bearings and have tried to put it back together. Im sure I have it 
>>> assembled correctly but am having issues getting the spring steel 
>>> plate screwed back on. So, of course Im doubting whether I am 
>>> putting it back together correctly. Instead of getting into details 
>>> as they would be too lengthy for an email, Im wondering if anyone 
>>> has a schematic of the assembly of this unit, has done one and can 
>>> give me pointers, or possibly send pictures of one you have done as a
guide? Anything would be helpful.
>>>
>>>
>>> Thanks-Bob-W0YBS
>>>
>>> --
>>> Thanks
>>> Bob Sauvan-W0YBS
>>> rsauvan at beyondbb.com
>>> http://w0ybs.com
>>>
>>> ______________________________________________________________
>>> Central-Electronics mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/central-electronics
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Central-Electronics at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net Please help support this 
>>> email list: http://www.qsl.net/donate.html
>>
>>
______________________________________________________________
Central-Electronics mailing list
Home: http://mailman.qth.net/mailman/listinfo/central-electronics
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Central-Electronics at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html