home *** CD-ROM | disk | FTP | other *** search
- FL2100B
-
- YAESU FL2100B 12 METER MODIFICATION
- by Bill Walton KJ6EO
-
- If you do not mind losing 10 meters on your FL2100B, this quick mod should
- have you up and running on 12 meters with near full power output.
-
- Place the FL2100B on its side with the LOADING control nearest the surface
- that the amp is setting on. Make sure that the amp has been UNPLUGED and that
- the PLATE VOLTAGE has dissipated before you proceed. Remove the screws that
- hold the bottom cover on and remove the bottom cover of the amp.
-
- Set the BANDSWITCH to : 10
- Set the PLATE CONTROL to : 9
- Set the LOADING CONTROL to: Fully counter-clockwise
-
- Disconnect the 850 volt red wire that leads from the transformer to the DIODE
- BOARD (located right behind the TRANS - OPERATE switch. Install a SWR bridge
- between the EXCITER and the FL2100B. Tune your HF rig to 24.950. Turn the
- FL2100B on and place the amp in the OPERATE MODE. Excite the the AMP with an
- AM signal, enough so that you can calibrate (set) your SWR meter. Place your
- SWR meter in the REV position and read the SWR. While in the TX mode, tune
- L206 (located near the GROUNDING WINGNUT just inside of the amp chasis) untill
- you achive your lowest SWR reading. You have just completed the retuning
- proceedure of the 10 meter ANTENNA INPUT COIL.
-
- If you would like to operate both 10 meters and 12 meters, you may want to
- tune L206 on a frequency between your operating fre-quencys on 10 and 12.
-
- Re-solder the 850 volt red wire (with the AMP off and un-pluged). Re-assemble
- the AMP and enjoy INCREASED POWER OUTPUT on 12 METERS.
-
- Send questions, comments, or other to: KJ6EO @ KJ6EO
- RELAYED BY N0KGX...GENE
- Downloaded From P-80 International Information Systems 304-744-2253
-