[Boatanchors] SBE-33 Alignment

[Lee Craner via Boatanchors]

David:
 
I too have fashioned a small alligator clip that mounts directly to the  
probe tip.  I have also placed shrink wrap over the probe tip, except for  the 
very end of the tip, in order to avoid shorting out anything  important.
 
73
Lee WB6SSW
 
 
In a message dated 3/31/2015 2:51:18 P.M. Pacific Daylight Time,  
dhallam at knology.net writes:

Well,  You are right.  I should have used the RF probe to get a reading.  
I also found that I had it set right in the nose with my previous  
adjustment by peaking the noise.  I have also found there are  changes, 
mostly in parts placement between the manual on BAMA and the one  that 
came with mine.  I gather there were some changes between the SF  series 
and the SF-1.  I haven't examined the two closely enough to  see if there 
were any circuit changes.

Does anyone have an elegant  way to get the tip of the 410B RF probe into 
tight places and be able to  hold it there without having it touch some 
thing and shorting it?  I  have used a short  jumper with alligator 
clips, but doesn't seem very  elegant.

David
KW4DH

On 3/31/2015 3:54 PM, rbethman  wrote:
> The HP-410B AC probe has a diode in it for RF.
>
>  The TS-505 VTVM also has an RF probe attachment.
>
> So RF  voltages at 455kc would be the place to use it.
>
> Bunches of  manuals do NOT tell you every measuring tool to use.
>
> It is one  of the reasons that I picked up a TS-585D audio instrument.
> It matches  the audio output impedance by switch, and gives a good
> reading when  procedures call for peaking an audio stage.
>
> It matched  anything that Uncle Sam had from something like 3.2 ohms up
> through  600 ohms.
>
> Regards, Bob - N0DGN
>
>
> On  3/31/2015 3:31 PM, David C. Hallam wrote:
>> No, This is the 455 kc  oscillator and I am using 410B.  The pot is on
>> the diode  modular ring to balance the carrier signal to the
>> modulator.   Maybe I should be looking at an RF voltage although the
>> manual  doesn't say anything other than to use a VTVM.  I suppose I
>>  should try the AC probe or a scope.
>>
>> David
>>  KW4DH
>
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