[Central-Electronics] 100V AF phase shifter

[Dennis Petrich]

OK, good to know, thanks....

-----Original Message-----
From: Bob Sullivan [mailto:robert at isquare.com]
Sent: Sunday, December 03, 2006 8:13 AM
To: Dennis Petrich; 'K6JEK'; central-electronics at mailman.qth.net
Subject: RE: [Central-Electronics] 100V AF phase shifter


I wish it were true but those little LCR meters - which are wonderful for 
many applications - are not very accurate. For example the little Tenma (a 
bit more than $100) has measurement accuracy of around +/- .75 to 1%!

73, Bob
WØYVA
Personal site: http://www.isquare.com/personal_pages/ras-hardware.htm


At 07:13 AM 12/3/2006, Dennis Petrich wrote:
>You should be able to use one of those hand held LC meters available these
>days for <$100 bucks....
>
>-----Original Message-----
>From: K6JEK [mailto:k6jek at comcast.net]
>Sent: Friday, December 01, 2006 11:42 PM
>To: central-electronics at mailman.qth.net
>Cc: Bob Sullivan
>Subject: Re: [Central-Electronics] 100V AF phase shifter
>
>
>Bob,
>
>I  took the liberty of posting your response to the reflector since
>others seem to be interested.   That's about what I expected --
>calibrated lab grade equipment.   I'm heartened to hear that the PS-2
>isn't likely the problem.
>
>I'm actually in procrastination mode.   I seem to have lousy opposite
>side band suppression.   I'm thinking about the problem rather than
>doing anything about it -- avoiding hoisting the 100V from the
>operating position to the work bench.   Hoisting is next.
>
>Thanks,
>
>Jon, K6JEK
>
>On Dec 1, 2006, at 6:44 PM, Bob Sullivan wrote:
>
> > Jon,
> >
> > I do a lot of 100V/200V restoration work and infrequently the PS-2
> > requires attention. Most hams don't have the equipment to measure to
> > that accuracy which requires a high-end LCR meter or bridge that has
> > been calibrated. An example would be the GenRad Model 1692. The
> > (fairly) good news is that older versions that sold for 10K and up are
> > now available for a fraction of that cost.
> >
> > When was the last time you sent a piece of test equipment to a
> > calibration lab? Hi.
> >
> > 73, Bob
> > WØYVA
> > Personal site: http://www.isquare.com/personal_pages/ras-hardware.htm
> >
> >
> >
> > At 09:05 PM 12/1/2006, you wrote:
> >> How do you work on the audio phase shift module?   It's full of
> >> resistors and capacitors "bridged to within .1%"   How do you measure
> >> capacitors and resistors that accurately?
> >>
> >> Jon, K6JEK`
> >>
> >> _______________________________________________
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> >>
> >
>
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