[Test-Equipment] TV-7 Calibration

Fri Oct 12 10:10:40 EDT 2007

No problem, I try to include as many manuals as I can, on the site but 
mostly
folks just hie off and either buy them or forget they are there. Most of the 
test
gear listed has manuals. Almost all of the radio stuff have manuals. Enjoy.
Don't be afraid to ask about others as some are just TOO big and I have them
if the party wants to borrow and copy it.
Jim
WB2FCN

----- Original Message ----- 
From: "DW Holtman" <tubestuff at comcast.net>
To: "Discussion of Electronic Test Equipment" 
<test-equipment at mailman.qth.net>
Sent: Friday, October 12, 2007 10:01 AM
Subject: Re: [Test-Equipment] TV-7 Calibration

> Jim,
>
> Thank you for the great link, I will down load a copy of the manual.
>
> Best,
> DW Holtman
> WB7SSN
>
> ----- Original Message ----- 
> From: "James M. Walker" <chejmw at acsu.buffalo.edu>
> To: "Discussion of Electronic Test Equipment" 
> <test-equipment at mailman.qth.net>
> Sent: Friday, October 12, 2007 6:49 AM
> Subject: Re: [Test-Equipment] TV-7 Calibration
>
>
>> If you would like the manuals in PDF for the TS-352 go to:
>> http://eshop1.chem.buffalo.edu/test-bench-equip.html
>>
>> Scroll down to the TS-352 and click on the manual you want.
>> The 4.5 volt batteries are available here in Buffalo, NY at The Battery 
>> Store.
>> Jim
>> WB2FCN
>> http://eshop1.chem.buffalo.edu
>>
>> ----- Original Message ----- 
>> From: "DW Holtman" <tubestuff at comcast.net>
>> To: "Discussion of Electronic Test Equipment" 
>> <test-equipment at mailman.qth.net>
>> Sent: Thursday, October 11, 2007 12:47 PM
>> Subject: Re: [Test-Equipment] TV-7 Calibration
>>
>>
>>> Robert,
>>>
>>> Great information. I should have specified, the voltage in question is 
>>> AC volts, not DC Volts. Any idea if what the imput inpedance might be 
>>> for a TS-352 type of VOM in the AC ranges?
>>>
>>> Thank you,
>>> DW Holtman
>>>
>>> ----- Original Message ----- 
>>> From: <WA5CAB at cs.com>
>>> To: <test-equipment at mailman.qth.net>
>>> Sent: Thursday, October 11, 2007 10:19 AM
>>> Subject: Re: [Test-Equipment] TV-7 Calibration
>>>
>>>
>>>> DW,
>>>>
>>>> As a philosophical statement, DVM's waste time when working on 
>>>> boatanchor
>>>> gear.  The natural tendency is to sit there and fool with the 
>>>> adjustment until
>>>> the meter or counter reads exactly what the book says.
>>>>
>>>> However, whether the meter impedance will make any difference to any 
>>>> given
>>>> measurement depends upon the source impedance.  It could make no 
>>>> difference, a
>>>> little difference or a bunch.  For example, the BC-611 maintenance 
>>>> manuals give
>>>> two charts for most test voltage settings, one using a battery operated 
>>>> VTVM
>>>> and one using another meter.  Some of the numbers are the same and some 
>>>> are
>>>> quite different.
>>>>
>>>> But if you want to make sure to set the thing the way it would have
>>>> originally been set, the TS-382(*)/U is 1000 ohms per volt on all AC 
>>>> ranges and
>>>> selectable either 20,000 or 1000 on all DC ranges.  That being the 
>>>> case, if the
>>>> instructions don't tell you which to use, it's probably safe to assume 
>>>> 20.000.  If
>>>> you shunt the meter probes with (20,000 x full-scale range) ohms, the 
>>>> TV-7
>>>> won't know you aren't using a TS-382.  :-)
>>>>
>>>> In a message dated 10/11/2007 11:01:37 AM Central Daylight Time,
>>>> tubestuff at comcast.net writes:
>>>>> Hello,
>>>>>
>>>>> I'm getting ready to go through a TV-7/U, step by step using the Depot
>>>>> manual (TM-11-6625-274-35). The first step, the bias voltage test 
>>>>> calls out a test
>>>>> setup then asks for a reading of 3.0 +_.1 Volts. I'm reading 5.26 
>>>>> Volts.
>>>>>
>>>>> My question is this. The procedure calls for using a TS-352 
>>>>> Multimeter. The
>>>>> only meters I have are high input impedance DVM and a VTVM. I know 
>>>>> that a
>>>>> TS-352 will load the circuit and cause a lower reading. Is there 
>>>>> anyway to make
>>>>> the necessary adjustments using a DVM or a VTVM? Is this a situation 
>>>>> where I
>>>>> will need to get a good quality VOM (Simpson 260 etc) to do the 
>>>>> adjustments?
>>>>> What is the ohms per volt on a TS-352?
>>>>>
>>>>> Thank you in advance for any suggestions.
>>>>>
>>>>
>>>> Robert Downs - Houston
>>>> <http://www.wa5cab.com> (Web Store)
>>>> MVPA 9480
>>>> <wa5cab at cs.com> (Primary email)
>>>> <wa5cab at comcast.net> (Backup email)
>>>>
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>>>>
>>>
>>>
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>>>
>>
>>
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>
>
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