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  1. 4

    4 X MRF151 /SD2931 pallet

    I sell these,tested and with all infofor 430 USD+ shipping from Israelto your place .these are real linear power houses!! Baruch 4z4rb 4z4rb1@gmail.com
  2. 4

    4 X MRF151 /SD2931 pallet

    another look and the bias system
  3. 4

    4 X MRF151 /SD2931 pallet

    The EB104 board from MOTOROLA has gained high popularity among ham radio operators. It was designed by Helge O. Granberg of Motorola (sk) back in the 70’s. HOG was probably the godfather of solid state power amplifiers. His designs were built and copied all over the globe by hams and...
  4. 4

    Construction of 140W PEP EB63 amplifier + Low-Pass Filters

    why did you add the vk200 in the feedback path? you do not need it at all! make the resistor a 82 ohms it will work better as I found out 4z4rb
  5. 4

    Alpha 9500 Amp videos at Dayton 2012

    too many leds in the panel. and the inside is not like it used to be from Alpha
  6. 4

    MS1051 vs 2sc2879

    look here for mods to your box http://www.radiomanual.eu/schemi/ACC_PA/RMitaly_KL-500_mod_DG2IAQ.pdf it is a very good file
  7. 4

    MS1051 vs 2sc2879

    yes i think it is 100ohm 5W metal film do not put a wirewound resistor!! WW resistors at 27MHz are like coils.
  8. 4

    MS1051 vs 2sc2879

    I know that amp.it is a nice box
  9. 4

    MS1051 vs 2sc2879

    Since the devices are very much alike there is no need to mod any of the transformers. 3:1 at in and 4to 1 at out will give best results.cap across trafo is 470pF-800pF max 4z4rb
  10. 4

    MS1051 vs 2sc2879

    Yes it can be done. set bias to 300mA per device and you are good!