home *** CD-ROM | disk | FTP | other *** search
- Article 40146 of rec.radio.amateur.misc:
- Newsgroups: rec.radio.amateur.misc
- Path: west.West.Sun.COM!news2me.EBay.Sun.COM!sun-barr!cs.utexas.edu!swrinde!emory!kd4nc!n4tii
- From: n4tii@kd4nc.uucp (John Reed)
- Subject: Mods for RCI-2950
- Message-ID: <1993May20.195809.24314@kd4nc.uucp>
- Organization: KD4NC HAM Packet Radio Gateway
- References: <1tfkd2INN7dl@uwm.edu>
- Date: Thu, 20 May 1993 19:58:09 GMT
- Lines: 111
-
- erchul@csd4.csd.uwm.edu (David A. V. Erchul) writes:
-
- >
-
-
- > Now that I have decided to get a RCI 2950
- > (Thanks Nick, Robert, John & haga?)
-
- > Would some kind soul PLEASE mail/post
- > any/all mods for the RCI 2950.
-
-
- > Thanks
- > Dave
-
- OK.....here they go...
-
-
- Subj: Ranger 2950 mods
-
- Someone here recently posted a message asking for available mods
- for the Ranger RCI-2950 10 meter radio. Here's what I have.
-
- Frequency Modification
- 1. Remove the case. I *think* you can remove either the top cover
- or the bottom cover to get to the PC board with the jumpers.
- It will be a small PC board immediately behind the front panel.
- 2. Locate "J2". There will be a jumper on pins P3 and P4.
- 3. Remove this jumper to expand coverage to 26 MHz - 29.7 MHz.
- 4. Move the jumper from P3-P4 to P1-P2 to expand coverage to
- 26 MHz - 32 MHz.
- 5. After moving (or removing) the jumper, press the CPU reset button
- (located below J2).
- NOTE: Operation between 30-32MHz may require retuning the VCO.
-
- CB Channel Readout Modification
- 1. Locate J1. There will be a jumper on pins P1-P2.
- 2. Remove jumper and place on P2-P3.
- 3. Press the LOCK button on the front panel. The readout will now
- display the CB channel number 1-40 -- also will display "A" channels.
- 4. Press LOCK again to return to VFO mode.
- NOTE: The SHF button will not operate while in CB mode.
- This modification will disable the frequency lock function.
-
- CB Channel 9 Select Modification
- 1. Locate J3. There is a jumper between P1-P2.
- 2. Remove the jumper and place it on P2-P3.
- 3. Press the "roger beep" button to go directly to CB Channel 9.
- NOTE: Doing this modification makes it impossible to turn off the
- roger beep feature (unless, *possibly* you make sure the
- roger beep is turned off before moving the jumper. I'm not
- sure).
-
- ------------------------------------------------------------------------
- "Tuneup" Modifications
-
- Adjust VR14 (AMC) for maximum forward modification. Mod limiter
- Q32 can be removed for more modulation, but it also disables VR12
- (SSB ALC) and disables variable power for SSB. I do not recommend
- removing Q32; you'll have plenty of modulation as is.
-
- Tune L34, L13, L14, L46 and L10 in AM mode for maximum forward
- swing, using a peak-reading wattmeter. Try to balance for even power
- from top to bottom of frequency range.
- NOTE: You'll have a LOT of trouble identifying these cans. Sorry,
- I don't know for sure where they are either.
-
- Adjust VR13 (AM High Power) for 12 watts dead key with the front
- panel RF power control at maximum. Adjust VR15 (AM Low Power) for
- 2 watts dead key with front panel RF power control at minimum.
- From the 12-watt dead key you should see a forward swing of 30-40 watts.
- From the 2-watt dead key you should see a forward swing of 18-20 watts.
-
- Adjust VR12 (SSB High Power ALC) for maximum PEP on SSB, then
- back off just a little, with front panel RF power control at maximum.
- Adjust VR16 (SSB Low Power ALC) for 5-6 watts PEP on SSB with front
- panel RF power control at minimum. You should see 40-50 watts PEP
- on SSB with front panel RF power control at maximum.
- --------------------------------------------------------------------
- Microphone wiring diagram
-
- Pin 1 -- shield
- Pin 2 -- Audio
- Pin 3 -- Transmit
- Pin 4 -- Receive
- Pin 5 -- Frequency select up \ These might be reversed.
- Pin 6 -- Frequency select down /
-
- --------------------------------------------------------------------
-
- Disclaimer:
- The preceding message is posted for information only. I do not
- condone the modification of amateur transceivers for use outside the
- amateur band. It is *possible* that performing the tune-up
- modifications will shorten the life of the radio's components due to
- driving them too close to their design tolerances. I accept no
- responsibility for possible damage to any radio that is modified in this
- way. I cannot personally vouch for any of these modifications; they
- were given to me by a technically-inclined friend.
- ---------------------------------------------------------------------
- --- GEcho/beta
-
- *******************
- I hope those help....I assume no liability for the above mods...I got them
- off some BBS somewhere and just merely passing them along...
-
- (I'm pretty sure they work...no CB bootleggin' there good buddy!)
-
- John
- n4tii%kd4nc.uucp@gatech.edu
-
-
-
-
- Copied from the QRZ! Windows Ham Radio CDROM
-
-