Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => AmpTools/Tech Tips => Topic started by: Hemi526 on March 23, 2008, 07:44:02 am

Title: Capacitor substitution
Post by: Hemi526 on March 23, 2008, 07:44:02 am

  Where is the best place to get a capacitor substitution box?

Title: Re: Capacitor substitution
Post by: HotBluePlates on March 23, 2008, 11:41:10 am

You can find ready-made boxes on ebay, but the good ones could be expensive and/or have a limited range of values.

Or you can make one. Get a apir of binding posts, whatever cap values you want, a single-pole multi-throw switch (say, 12 positions) and a box. Use a common end that runs to one of the binding posts, and connect that common to one leg of each of the caps. Connect the other end of the caps to a position on the switch, and the center lug of the rotary switch to the other binding post.

Cap substitution box done.

Title: Re: Capacitor substitution
Post by: Hemi526 on March 23, 2008, 06:45:20 pm

  I might try that, thanks

  Looks like I will have to do that, cant find anything I like on ebay or on the net.

Title: Re: Capacitor substitution
Post by: JerryErickson on March 31, 2008, 04:53:33 pm

Ted Weber has some here:

https://amptechtools.powweb.com/subs.htm

Title: Re: Capacitor substitution
Post by: Hemi526 on March 31, 2008, 07:03:41 pm

Thanks

Title: Re: Capacitor substitution
Post by: sawdust on April 01, 2008, 05:52:09 am

http://www.oselectronics.com/ose_p66.htm

Dave