1/4" super flex makes a pretty decent gimmick capacitor.
On Sun, Jun 27, 2010 at 10:16 PM, skipp025 <[email protected]> wrote: > > >> Instead of piston trimmers you might want to try ARCO >> padders (postage stamp size that can tolerate higher levels >> of rf current) or small air variable capacitors. I have >> nfound both at reasonable prices at this site: > > A generic statement that has merit in this subject > > "Q is everything" and the Q of an Arco cap ("padder") is probably > no where near as good as a decent piston cap. > > Ebay provides the occasional deal on nice piston caps. If you're > not at a critical current location, the A49 piston caps in the > following sale ad work for some applications. > > http://www.hamtronics.com/sale.htm > > s. > >> http://www.danssmallpartsandkits.net/ >> >> 73 and aloha, Eric KH6CQ >> >> --- On Sun, 6/27/10, Tim <tahr...@...> wrote: >> >> From: Tim <tahr...@...> >> Subject: [Repeater-Builder] Piston Trimmer Voltage Rating >> To: [email protected] >> Date: Sunday, June 27, 2010, 11:18 AM >> >> >> >> >> >> >> >> Â >> >> >> >> >> >> >> >> >> >> Hi folks, >> >> >> >> Am just finishing up the 6 meter heliax duplexer project, >> >> and am getting some pretty good numbers. (3 'cans' on >> >> each side, >90dB notch & about 1.2dB 'pass' attenuation).. >> >> >> >> Anyhow, I used some Johanson piston trimmers that I had, >> >> but evidently they are a bit shy on the working voltage >> >> rating, as the one closest to the transmitter (80 w, @53.15) >> >> didn't quite cut the mustard! A nice arc hole in the piston. >> >> >> >> Anyhow, was wondering what the working voltage is for >> >> these guys. >> >> >> >> Guess I need to look around for some substitutes. >> >> >> >> Thanks, >> >> >> >> Tim W5FN >> >> Utopia, TX >> > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > >
