[Amps] Capacitor Values

[Jim Thomson]

Date: Tue, 16 Nov 2010 19:01:35 -0500
From: Dave M <slash_dot at msn.com>
Subject: [Amps] Capacitor Values
To: <amps at contesting.com>
Message-ID: <BAY148-w48EAA1C76551142BA2116580380 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"


Well as luck has it just as I am putting together my tuned input my LCR meter went south ( my own fault for getting something cheap off Ebay ) I have some compression trimmers I am trying to find values for , is there anyone with an old catalogue or reference to Unelco stock , the trimmers are numbered :
 
495A02
495A03
495A04
495A05
 
I will get a new meter soon but any help would allow me to select the proper values until I do 


......................................................................................................
 
73     VE3DV , Dave

## why not just use Arco  compression trimmers ?  Get the big ones for the low bands, which require  minimal padding.
High bands require no padding. Adjustment for flat swr when done..is a snap. 
If you want a real LCR meter,  get a  B+K  875-B.    [ mouser].    Then you  have 
.1pf resolution below 200 pf.    It will  give you 1 pf resolution above 200 pf.  Read's
caps  up to 20,000 uf.  It will read uh  down to  .1 uh.  Great for coils.  It reads AC
resistance...down to .001 ohm .    I also use the ac ohms to do stuff like  read the 
ESR on hv lytics.  3 yr warranty, industry standard.   I also have the older 875-A.  [bought in 1990]
Both work flawless, and #1 tool  when building linears,  tuned inputs, and pi/pi-L  tanks.
The inductance scales  go from .1 uh  up to 200H.... which is good for old chokes etc. The
875-B has front panel zero set adjustment, so you can zero out teat lead uh /pf. 
I would be screwed without the LCR meter, dead in the water.  95%  of ham radio / hb linears  is
uh/pf.    I also use it to measure all stray pf and uh.    

Later.... Jim   VE7RF