[Test-Equipment] Mesurements Corp Model 111-B question

[Richard Knoppow]

    A very old message from me is quoted below.  I have an 
instruction book which I could not find at the time.  I 
don't have means to scan it.  I wound up buying some small 
crystals from someone on ebay. I think they were a dollar 
each or something like that, so I bought five.  One tuned in 
on the nose and has been very stable. Because it had flying 
leads I soldered it to the tabs on the existing crystal 
socket. I still have no idea of what the proper load is. 
There is no capacitor across the crystal so I suppose the 
load capacitance is the tube capacitance.  I will dig out my 
instruction book again and see if I can describe the circuit 
well enough to satisfy IC's requirements for information. 
The original crystal in mine was made by McCoy and just went 
dead.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com\


----- Original Message ----- 
From: "Dennis Riise" <dariise1 at gmail.com>
To: "Discussion of Electronic Test Equipment" 
<test-equipment at mailman.qth.net>
Cc: "Glenn Little WB4UIV" <glennmaillist at bellsouth.net>; 
"Richard Knoppow" <1oldlens1 at ix.netcom.com>
Sent: Tuesday, April 02, 2013 4:28 PM
Subject: Re: [Test-Equipment] Mesurements Corp Model 111-B 
question


> As stated below, If you have the schematic, they can 
> figure the load cap
> from a copy of it.  Most years in the past that was all 
> they needed.
> What freq is needed for this device ?
>
> Dennis, K5AVT
>
> Maybe I have helped ????
>
> DAR
> On 7/16/2011 3:38 PM, Glenn Little WB4UIV wrote:
>> Send a copy of the schematic to International Crystal.
>> They can determine the proper crystal from the circuitry.
>> If you determine the capacitance and get it wrong, it is 
>> your problem.
>> They can eliminate the guess work.
>>
>>
>>
>> 73
>> Glenn
>> WB4UIV
>>
>> At 03:37 PM 7/16/2011, you wrote:
>>>       I have a Measurements Corp Model 111-B crystal
>>> calibrator with a bad crystal. I contacted International
>>> crystal but they need to know the capacitive load before
>>> they can make a new crystal. I have no idea of what it 
>>> is
>>> and my attempts to measure it were not successful. I 
>>> wonder
>>> if anyone on the list knows what the load is, it would 
>>> be
>>> very helpful.
>>>
>>>
>>> --
>>> Richard Knoppow
>>> Los Angeles
>>> WB6KBL
>>> dickburk at ix.netcom.com
>>>
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