[Boatanchors] SBE-33 Alignment

[Jbrannig at verizon.net]

I forced the back end of an alligator clip over the tip.

It worked quite well.

Jim

-----Original Message----- 
From: David C. Hallam 
Sent: Tuesday, March 31, 2015 5:49 PM 
To: rbethman ; boatanchors at mailman.qth.net 
Subject: Re: [Boatanchors] SBE-33 Alignment 

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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