[R-390] Fwd: Antenna trimmer drawings

[Barry]

Thanks for that, Nick.  I don't think we ever had any formal roll-pin punches in the machine shop where I worked.  We made do with ordinary pin punches and likely never knew such fancy punches existed.  :)

I think you're correct on it being a roll-pin.  I should never even try to trust my memory from that long ago!

Thanks,
Barry - N4BUQ

> .062/.065 is probably a tolerance as the parts list is for a mil-spec
> MS171434 cylindrical 3/8 x 1/16 slotted pin
> https://www.huyett.com/ms171434
> You should be able to drive it out with Kroil and a 1/16 roll pin punch.
> 
> It is a good day -- I learned something new - roll pin punches vs. pin
> punches
> found in a machinist forum on line -
> "Roll pin punches are just like pin punches, but have a small projection on
> the center of the end to keep them from sliding off the end of the pin and
> are a couple of thousandths smaller than the nominal pin size so they will
> not bind in the hole."
> https://www.mcmaster.com/roll-pin-punches/
> https://www.mcmaster.com/mvD/Library/M3/20230328/DDA71A01/3421A33_Pin-Removal%20Punch%20for%20Hollow%20and%20Spring%20Pins.PDF
> 
> My motto - "It is a damn poor job that doesn't require at least one new
> tool."
> 
> -------------------
> Slotted Spring Pin 1/16" x 3/8" Standard Duty 410/420 Stainless Steel
> Passivated MS171434
> 
> • 410/420 are both martensitic stainless steel with moderate chromium
> contents of 11.5 to 13.5% and 12 to 14%, and carbon levels of .08 to .15%
> and .30 to .40%
> • A passivated part is one that has been chemically treated to help reduce
> its ability to react to exposure and corrode
> • Stainless steel contains more than 11% chromium, resists corrosion,
> maintains its strength at high temperatures, and is easily maintained
> • Stainless steel is strong, durable, and corrosion resistant
> • Slotted spring pins are hollow, cylindrical tube-style press fit
> fasteners with chamfered ends that are lighter, cheaper, and easier to
> install than solid pins
> • Commonly used as locking devises, positioning points, anti-chafing
> surfaces, shafts, or sleeves for wiring
> ----------------------------------
> 
> Nick England K4NYW
> www.navy-radio.com
> 
> 
> On Thu, Sep 12, 2024 at 8:04 AM Jordan Arndt <Outposter30 at shaw.ca> wrote:
> 
>> Thanks Nick for that information...I'll be reviewing it as time allows.
>>
>> One question of the bat however...The roll pin diameter dimension is shown
>> as .062/.065. Is this a tolerance allowance or does it indicate that the
>> pin itself is tapered...?
>>
>> Tapering of the pin may explain at least some of the difficulties I've had
>> removing the pin..
>>
>> Thanks again an VY 73...Jordan VE6ZT
>>
>> ----- Original Message -----
>> *From:* Nick England <navy.radio at gmail.com>
>> *To:* Jordan Arndt <Outposter30 at shaw.ca> ; Collins R-390 HF Receiver List
>> <r-390 at mailman.qth.net>
>> *Sent:* Thursday, September 12, 2024 5:49 AM
>> *Subject:* Antenna trimmer drawings
>>
>> Oh, I created an actual searchable index to the drawings here
>> https://www.navy-radio.com/rcvrs/r390a/drawings.htm
>>
>> A quick search for “trimmer” shows this assembly drawing
>>
>> https://www.navy-radio.com/rcvrs/r390a/drawings/17310-05/05-95-SM-C-248962-TRIMMER%20ASSY%20-%20R.F..pdf
>>
>> It references this capacitor drawing
>>
>> https://www.navy-radio.com/rcvrs/r390a/drawings/17310-04/04-80-SM-B-283234-CAPACITOR,%20VARIABLE.pdf
>>
>> There are also 3 other detail drawings showing shaft, bracket, and shield
>>
>> Nick England K4NYW
>> www.navy-radio.com
>>
>> On Thu, Sep 12, 2024 at 6:29 AM Jordan Arndt <Outposter30 at shaw.ca> wrote:
>>
>>> I am currently dealing with serious family issues leaving little time for
>>> anything else, but I was wondering of anyone has found, or knows if those
>>> drawing files contain any info regarding the Ant Trim assembly..?
>>>
>>> Given that the assembly appears to have been provided as a complete unit
>>> to
>>> production, there might not be drawings regarding the assembly, but I
>>> currently do not have time to investigate the now available drawings.
>>>
>>> Since I have been unable to fully disassemble the Ant Trim assembly
>>> because
>>> I've been unable to remove the roll pin, I need to know what is inside
>>> the
>>> assembly for spacers and if there might be a phenolic centering bushing
>>> on
>>> the inside of the assembly...
>>>
>>> Any info would be greatly appreciated...
>>>
>>> 73...Jordan VE6ZT
>>>
>>> ----- Original Message -----
>>> From: "Glenn Little WB4UIV" <glennmaillist at bellsouth.net>
>>> To: "jkharvie" <jkharvie at verizon.net>; <r-390 at mailman.qth.net>
>>> Sent: Wednesday, September 11, 2024 8:19 PM
>>> Subject: Re: [R-390] Meter Gaskets?
>>>
>>>
>>> > Tom M located the drawing package and they are hosted by Nick England.
>>> > The package appears very complete.
>>> > You could come close to building a R390A from the package.
>>> >
>>> > I just forwarded the information.
>>> >
>>> >
>>> > The pdf version of all 1000 drawings are now posted here -
>>> > https://www.navy-radio.com/rcvrs/r390a/drawings/
>>> > The categories are ones Tom used as labels
>>> >
>>> > Glenn
>>
>>
>>
>>>
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