The only "fly in the soup" is... I would suspect compound properties at ~2450MHz have different D-Factor performance versus the mentioned in the VHF band.
cheers, s. > "IM Ashford" <[EMAIL PROTECTED]> wrote: > > Paint a polythene cup with your favourite antenna covering. Let it dry and put it into the microwave oven along with a cup of water (to act as a dummy load) > Cook for 1 min on max power. > If it gets even slightly warm its no good for antennas. > > er.. can I please have an award for the first cooking recipe to get past the moderator on repeater-builder > > Ian > G8PWE > > ----- Original Message ----- > From: skipp025 > To: [email protected] > Sent: Sunday, May 04, 2008 2:44 PM > Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch Kote > > > I constructed a 6 meter beam some years back, worked like a bomb > even at 25ft above ground elevation. To ensure my pride and joy > would last a long time I sprayed it with clear Krylon brand spray > paint. > > The antenna was instantly unusable regardless of my efforts to > remove the paint, re-tune or otherwise modify the antenna. I later > learned that type of paint contained materials with a horible > D-Factor. I was never able to use the antenna again, although it > remains in my back yard as a reminder. > > cheers, > s. > > > "Chuck Kelsey" <wb2edv@> wrote: > > Boy, you took a gamble. I'd have been afraid that this action > > could have either messed up the VSWR or shifted the resonant > > point of the antenna. Then again, maybe it did and either > > you don't know that or it wasn't significant. > > > > Chuck > > WB2EDV > > > > > > ----- Original Message ----- > > From: "skipp025" <skipp025@> > > To: <[email protected]> > > Sent: Sunday, May 04, 2008 12:19 AM > > Subject: [Repeater-Builder] Re: antenna question - Dip It and Scotch > Kote > > > > > > > Hi Robert, > > > > > > You might get lucky... because they might also have advertised > > > the dip-it as an insulator material, which means someone was > > > hopefully looking at the dissipation factor (aka D-Factor) when > > > the compound was engineered. Time will tell... > > > > > > cheers, > > > skipp > > > > > >> "georgiaskywarn" <kd4ydc@> wrote: > > >> Someone else told me that after I had put a whole can of dip > > >> it on the db408 I showed you. I went back and covered every > > >> inch of it with liquid electrical tape. I have had good > > >> results in the GA sun with it. > > >> 73, > > >> Robert > > >> KD4YDC > > >> > > >
