View previous topic :: View next topic |
Author |
Message |
Bernie wb9bzl Guest
|
Posted: Thu Mar 07, 2013 2:13 am Post subject: MRF455 2 stage amp LOW Power |
|
|
Can any one help me trouble shoot a Generic Amp"HY Watt 150"
Linear amp for amateur radio ten meter band. I dont have a diagram and the the RF out is LOW! |
|
Back to top |
|
|
Pentode
Joined: 30 Oct 2007 Posts: 85 Location: Nr. Manchester (UK)
|
Posted: Wed Mar 27, 2013 8:03 pm Post subject: |
|
|
I assume that you checked any alignment should it not be a broadband amplifier and that the drive is correct, and maybe the standing current through the collectors are correct should they not be in class 'C'.
MRF455 transistors are made up of multiple transistors, sometimes one or more can breakdown the effect would then be a lower RF output, this must be kept in mind in this situation, MR455 is not one solid transistor so to speak.
Providing all else has been checked then this 'could' be the probable cause.
Dave |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
cph3317 Sanyo • TVP0393 Sony • aq659100 Philips • AE6190 HD ALBRECHT • XXV02A Kenwood • Sanyo DP46848 P46848-07 N6EFF [SM] Sanyo • ixgq24n30pb Ixys • 19790125 Status Report For January 79 xe • Philips+46PFL6008-96 Philips • irf840aspbf irf840alpbf International Re •
|