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DA25 

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Now we are ready for the moment of truth, the running of your discone an-
tenna. Were pretty sure by now you have a place selected to install it, you can 
use a couple of nylon wire ties and a bit of 1” PVC pipe to fasten it into place. 
A fairly good “poor mans” test is to search on your scanner or radio receiver 
for a weak station, one that is barely breaking the threshold of your receivers 
sensitivity. Note your signal strength indication of the station, and proceed to 
disconnect your existing antenna and replace it with your DA25. If your like 
our many satisfied customers, your notice a significant improvement in signal 
quality. Try this test on several frequencies throughout the band, and find out 
just how poorly your original antenna was working!   

TROUBLESHOOTING GUIDE 

If your DA25 does not work at all, re-check the following: 

•

Correct connection of the soldered coaxial cable ends. Sometimes the ac-
tion of installing the PVC pipe stresses the wire and can cause a break. 

•

Is that disk on the top soldered to the feed through wire? Make sure that 
the wire hasn’t folded under the disk and shorted by touching the ground 
connections somewhere. 

•

all solder connections 

 
Still having trouble? While we had hoped that it wouldn’t come to this, if you 
are still having trouble with your DA25 here are a few additional suggestions. 
  
Use a methodical, logical troubleshooting technique. Most problems can be 
solved using common sense. A volt-ohm meter and a clear head are usually 
all that are needed to correct any problem. Most problems are due to 
misplaced parts and/or bad solder connections. Working backwards through 
the assembly steps will often lead you to the problem. Re-visit the extensive 
theory of operation include in this manual, and try to apply to your specific 
problem. 
 
Have another set of eyes look through your work. Here at the shop we have 
often run into a “stone wall” of a problem only to have a fellow technician see 
our obvious error. It is sometimes very difficult to see your own mistake, taking 
a break can often solve this common problem. 
 
Make sure that you have “checked” all the assembly steps boxes, you may 
have forgotten one or two of them. 
 
Please understand that it is nearly impossible to “troubleshoot” by phone, any 
specific questions should be documented and sent to us by mail.