[R-390] OT: Looking for TS-352 or AN/URM-105 or 1000ohm/v tester

[Llgpt at aol.com]

Ah, the Federal Government in their all consuming stupidity always does  
something like this.
 
The TS-352 series used 1 - D cell and 3 - 4.5 volt batteries. In their  
wisdom, they surplused them out because the 4.5 volt batteries are no longer  
available. That's the kind of thinking that has our country in financial trouble  
as I type.
 
I simply take a couple of plastic battery holders, one for 3 AA batteries  
and one for a 9 volt battery. Let's see, 3 X 1.5 volts = 4.5 volts, 9 volts +  
4.5 volts = 13.5 volts. Gee, why didn't "they" think of that???
 
I have refitted more of the TS-352 series than you can shake a stick at  over 
the years. Good meter and if I had a spare, I would offer it to Gary cheap.  
I have bought them off the E place for years and refitted them.
 
But, I'm only a low level Government  Wage Grade employee, what do I  know???
 
And, that's the way the Government spends your tax dollars and thinks  folks, 
end of economics lesson.
 
Les Locklear
 
 
In a message dated 3/20/2005 1:03:54 PM Central Standard Time,  
roy.morgan at nist.gov writes:

At 09:35  PM 3/19/2005 -0500, Flowertime01 at wmconnect.com wrote:
>Gary  KB1FBI.
>
>I think the TS-352 is a battery powered meter. If was  surplused out
>as it used some non standard shaped batteries. If you  find a meter,
>you likely cannot find batteries.

If *I* remember  correctly the TS-323 is a very heavy, indestructible VOM 
with cover and  handle.. fine for boatanchor work but you have to move the 
probe lead to  change ranges on it.  Not all that convenient.  Neat meter  
however.

The batteries were two (?) three-cell batteries with screw  terminals on 
top.. you can simply solder together three AA batteries and  put them into 
the battery compartment.  The batteries are only used  on the OHMS 
scale.  There may also have been a D cell for the lowest  range.

If anyone has one of these and needs a manual, I think I have a  copy 
here.  I also have a manual for the TS-505 VTVM mentioned in the  R-390 
repair and alignment procedures.

The TS-223 is another  animal, a much more modern, plastic cased unit that 
used mercury  batteries.  You can solder two sets of three AAA cells and put 
them  inside the meter case just fine.  The C cell it also uses is common  
and goes in the normal place for it.. The batteries are used on the ohms  
range, the mercury cells ran a single FET for the ohms detector  
circuit.  The FET is NOT used on voltage measurements, so hamfest  hawkers 
who tout them as FET-input meters are stretching the  facts.


I thought a TV 7 was a tube tester. What are  you doing that is so
>exact that you are worried about the voltage  reading you are getting
>from you today's meters with there higher  resistance per volt?

Adjusting the signal voltage in the TV-7 is the  most critical setting, I 
think.

>  Did I say  R390?

Yes, you did. AND, a proper checkout for any TV-7 is to test all  the tubes 
in all of your R-390's.

So there..  :-)

Roy

Roy Morgan
K1LKY since 1959
7130 Panorama Drive,  Derwood MD 20855
301-330-8828 home .... 301-975-3254  work
roy.morgan at nist.gov