Mike, I started with the pre-driver, driver, and than the final stage each separately by tuning C2 and C9 for minimum VSWR in and max output power. Finally, went through each stage again tuning C2 and C9 for minimum VSWR, maximum power and maximum efficiency.
Thanks, Pat --- In [email protected], "Mike Mullarkey" <k7...@...> wrote: > > Are you tuning for max out of the amp. What is the manual saying. Start at > the first stage and tune for max out through all the stages. > > > > > > Mike Mullarkey K7PFJ > > 6886 Sage Ave > > Firestone, Co 80504 > > 303-954-9695 Home > > 303-954-9693 Home Office & Fax > > 303-718-8052 Cellular > > From: [email protected] > [mailto:[email protected]] On Behalf Of flashport68 > Sent: Monday, August 03, 2009 4:38 PM > To: [email protected] > Subject: [Repeater-Builder] Tuning TPL UHF Amplifier > > > > > > I have a PA6-1BE-RXRFPS amplifier that was factory tuned to 451-465 MHz and > I need to re-tune the amplifier to 443 MHz. After following the re-tuning > directions in the manual, I am only able to get 80 watts out with 10 watts > in. However; with 10 watts in between the factory tuned frequency range, I > am able to get over 100 watts out. The schematics do not list any component > changes that need to be made when re-tuning the amplifier. Does anyone have > any experience with re-tuning these amps and/or component changes that > should be made to tune these into the ham band? > > Thanks, > > Pat > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.392 / Virus Database: 270.13.41/2277 - Release Date: 08/02/09 > 05:56:00 >
