[Boatanchors] SBE-33 Alignment

[David C. Hallam]

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

On 3/31/2015 3:15 PM, D C _Mac_ Macdonald wrote:
> *I'm not familiar with the SBE stuff, but I expect you are supposed to 
> be looking at an RF (AC) voltage there. *
> **
> *Is your voltmeter capable of reading what are probably fairly low 
> values of a somewhat high frequency (5 - 9 MHz or so) voltage? *
> **
> *An old Heathkit or other VTVM should probably suffice for this. A 
> "modern" digital multimeter?  Maybe, maybe not. *
> *
> * * * * * * * * * * *
> * 73 - Mac, K2GKK/5 *
> * (Since 30 Nov 53) *
> * k2gkk hotmail com *
> * Oklahoma City, OK *
> * USAF & FAA (Ret.) *
> * * * * * * * * * * *
>
>
> *
> > Date: Tue, 31 Mar 2015 15:07:59 -0400
> > From: dhallam at knology.net
> > To: boatanchors at mailman.qth.net
> > Subject: [Boatanchors] SBE-33 Alignment
> >
> > Are there any SBE-33 knowledgeable people on this reflector? I have
> > posted to the SBE group but it seems that it takes a couple of days
> > before my messages are posted to the group.
> >
> > I am stumped on the first step of the SBE-33 alignment procedure,
> > carrier oscillator alignment. I am supposed to measure the voltage on
> > the center arm of the carrier oscillator pot and adjust T4 for a
> > maximum. I get no voltage reading on the center arm of the carrier
> > balance pot even with adjustment of T4. I assume the carrier oscillator
> > is working because the set will receive, and I can peak noise by
> > adjustment of T4.
> >
> > I suppose the next thing to do is to put the scope on the oscillator.
> >
> > What could be the reason(s) for no voltage readings.
> >
> > David
> > KW4DH
> >
> > --
> > There are two possible outcomes: if the result confirms the hypothesis,
> > then you've made a measurement.
> > If the result is contrary to the hypothesis, then you've made a 
> discovery.
> > Enrico Fermi
> >
> >
> >
> > -----
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-- 
There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement.
If the result is contrary to the hypothesis, then you've made a discovery.
Enrico Fermi




-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5863 / Virus Database: 4321/9422 - Release Date: 03/31/15