[R-390] Test Equipment

[Lester Veenstra]

Not necessarily improvements in the results, but certainly in the ease,
speed, and reproducibility.  Been there and done that (CTM1) and I have to
say it was a joy to get do the job with an HP 606 and 5248.  

In retrospect, what I would really would like to have had back then would be
a synthesized sweeper to get the IFs to where they can be and noise source
to properly characterize sensitivity, rather than the bogus numbers you can
get by tuning the SigGen to a hot spot (peak) in the IF response.   

New rant:
So yes, you can do good things to an R-390 with a URM-25 and a PSM-4. On the
other hand you can do bad things with a tv-xx. The only useful tube tester
you should use, and will ever need, is the R-390. What you get, from a tube
tester, is meaningless where it is critical, and frequently condemns
perfectly usable tubes. Instead of spending money on tube ?testers?, you
should spend it on a collection of spare tubes.

 
Lester B Veenstra  MØYCM K1YCM
lester at veenstras.com
m0ycm at veenstras.com
k1ycm at veenstras.com
 
 
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-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Pete Williams
Sent: Sunday, February 15, 2009 12:29 AM
To: r-390 at mailman.qth.net
Subject: [R-390] Test Equipment

G'day....  well, for goodness sakes guys... belittling a URM-25,56+years
old, because it doesn't do alinement/tests or whatever to current standards
pays no respect to history.--Vintaqe.
Used for R-390's it's perfectly satisfactory-why, you can align a R-390
using the calibrator if you read the manual and have your druthers about
you.
Any noticeable/useable  improvement using later sophisticated  gear is
fetishism to extreme lengths ---- get real !
Pete
 


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