Welcome, please log-in to participate in this (your) forum, by logging in you agree to abide by the rules of this forum. Until you make your FIRST Login and post, you cannot PM a Member.

Antique Radio Forum for Collectors
HomeHome  RegisterRegister  Log inLog in  PublicationsPublications  SearchSearch  
Posting Pictures Here,click or copy this link for instructions:

Use the smallest size


 "Making" a variable capacitor

Go down 

Join date : 2010-11-22

"Making" a variable capacitor Empty
PostSubject: "Making" a variable capacitor   "Making" a variable capacitor Icon_minitimeApril 25th 2018, 8:31 pm

If you have a project and need, say a 200 pf variable, and all you have is a 365 pf variable,
you can simply remove rotor plates one by one until your capacitance meter says you have achieved the correct value. Be careful, if you get close, generally that's just fine. A bit more is easier to deal with than trying to put a plate back on.
 (And yes, you can even cut material off of one rotor plate to make it "exact".)    
 Now back in the early days of radio, the variables were all hand assembled and bolted together, so it was really easy to remove plates (or replace some if you goofed and removed too many plates.)
On the APC types it's easier to cut out individual sections of the stator plates most of the time.
Back to top Go down
"Making" a variable capacitor
Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
ANTIQUE-RADIO-LAB :: Radio Repair Bench :: Hints & Kinks-
Jump to: