[Test-Equipment] HP 200 CD - UPDATED

[TELEGRAPHER at att.net]

 Think that's the nomenclature for the one i have setting on a shelf out in the shed.  Picekd it up 5-6 years back and that's where it's been ever since.

Larry
W0OGH


  -------------- Original message from kf9nz at juno.com: --------------


>       Thanks to all for the info.  I guess I should have Googled "200CD"
> before I bothered all of you.   Mine must be a very late version since it
> uses miniature tubes instead of the metal octal base ones shown in the
> manual I just looked at.  I carried one of these boys around a lot back
> in the '60's, but never opened up the case until I got this one.  They
> never failed.   Too bad hp exists in name only today.
> 
> Frankf9nz   
> 
> 
> On Sat, 31 Jan 2009 12:51:36 -0800 "Eric Lemmon" 
> writes:
> > I compared both HP200CD manuals on the BAMA site with their tables 
> > of
> > contents, and found that Section IV page 13 is missing, and page 12 
> > is
> > included twice.  Page 13 is the troubleshooting chart.
> > 
> > 73, Eric Lemmon WB6FLY
> >  
> > 
> > -----Original Message-----
> > From: test-equipment-bounces at mailman.qth.net
> > [mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of Eric 
> > Lemmon
> > Sent: Saturday, January 31, 2009 12:24 PM
> > To: 'Discussion of Electronic Test Equipment'
> > Subject: Re: [Test-Equipment] HP 200 CD
> > 
> > You can download a very good copy of the 200CD manual at this site:
> > 
> > 
> > Choose the "200cd_cleaned" version- it's very good.  You will find 
> > the
> > component values in the parts list.  The 5AR4 rectifier can be 
> > replaced with
> > a 5Y3GT tube.  You can't replace a tube rectifier with silicon 
> > diodes unless
> > you compensate for the greatly-reduced forward voltage drop of the 
> > latter,
> > and that can be problematic.  I suggest that you stick with the 
> > original
> > parts.
> > 
> > 73, Eric Lemmon WB6FLY
> >  
> > 
> > -----Original Message-----
> > From: test-equipment-bounces at mailman.qth.net
> > [mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of 
> > kf9nz at juno.com
> > Sent: Saturday, January 31, 2009 12:01 PM
> > To: test-equipment at mailman.qth.net
> > Subject: [Test-Equipment] HP 200 CD
> > 
> >         A 200CD followed me home recently after being abandoned.  
> > It
> > lights up and does produce tone, although I only had it on for a 
> > few
> > seconds to see if there was any smoke leaking out.   Can anyone tell 
> > me
> > the value of the three electrolytic caps C12-C13-C14 in the P.S.?    
> > 
> > Also, what is a 5AR4 tube?  Obviously a rectifier, but I have never 
> > heard
> > of it.  Is there any common type replacement?    I suppose a couple 
> > of
> > silicon diodes would do the job if the 5AR4 quit anyhow, but I'd 
> > just
> > like to know. 
> > 
> > Frankf9nz
> > 
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