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" <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]> > 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 > >> >
