From horak
Newsgroups: alt.radio.scanner

From: horak
Subject: Pro2005/6 SSB MOD HERE!

Nntp-Posting-Host: eugene.convex.com

Organization: CONVEX Computer Corporation, Richardson, Tx., USA

Date: Mon, 31 May 1993 18:04:59 GMT

X-Disclaimer:This message was written by a user at CONVEX Computer

              Corp. The opinions expressed are those of the user and

              not necessarily those of CONVEX.





I had a few requests for this mod so I thought everyone would benefit...



This is the mod for adding SSB capability to your Pro2005/2006.  It is

taken in part from Bill Cheek's Scanner Mod Handbook Volume 1.  As long

as you have a shortwave receiver with an external antenna jack and

capability to tune to 455 KHz, you can interface it to the Pro2006 with

this mod.  It is best if you use a static safe work environment to

perform this mod and you should have some technical knowledge.  Also, a

schematic would be helpful but is not necessary.



You will need the following parts:



 Output jack (I use a 1/8 mini earphone jack but some like a BNC.  The

     1/8 mono jack is easier to install because you don't have

     to drill as big a hole in the back of the unit)



 .01 uF capacitor



 5 Kohm resistor (1/4 watt)



 6 inches of mini coax or other shielded cable



 A cable to run from the 2006 to your shortwave.  I use the shielded

 cable that has the 1/8 plug on one end and a phono plug on the other

 end  (1992 catalog Radio Shack P/N 42-2444 works for me).  The phono

 plug is perfect for the antenna input of my DX440 shortwave receiver.



The first step is to remove the cover of the unit and drill a hole in

the back of the 2006 for your 1/8 or BNC plug.  (You will want to wrap

some tape around the drill bit about an inch from the end to keep it

from cruising right on into the electronics once it punches through the

metal!)  Solder the 5K resister to one end of the .01 uF cap.  Solder

the other end of the cap to the shielded coax wire.  Solder the other

end of the coax to your 1/8 phono plug (or BNC) and ground the cable at

this end.  Now that the cable is in place you are ready to connect it

to the 455 KHz source which is D33.  It is on the top circuit board

near the middle left, not too far from a huge capacitor.  Solder the

end of the resistor to the cathode of D33.  (This should be the top of

the standup part)  Now you can test it out before you put the cover

back on to make sure you did everything correct.  You should be able

to tune to some local airport or CB frequency on your 2006 and receive

the same thing on your shortwave (with it tuned to 455 KHz and hooked

up to the 2006 of course).  If you tune something on your scanner that

is SSB, you should be able to switch your shortwave to SSB and tune in

the signal just fine.  Beware of one thing, since the 2005/6 only tunes

in 5 KHz increments minimum, you may notice from time to time that the

signal on your shortwave isn't real clear.  It may be that you will

need to tune the shortwave anywhere from 451 to 459 KHz to tune in the

signal well!



If you don't succeed or this description has you baffled you probably

shouldn't be doing the mod in the first place.  I assume no

responsibility for screwups.  Good luck



David




SOURCE: The QRZ Windows Ham Radio CDROM