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  1. A

    Monsanto HT series 8730 Frequency Counter

    Hello Group the inside board is made by Monsel that's all i got go on. va3awc Al
  2. A

    Monsanto HT series 8730 Frequency Counter

    Hello i am looking for copy of a Schematic for this Monsanto HT series 8730 frequency counter 520 mhz.ser:589 Model:8730. Thanks. Al va3awc.
  3. A

    colt 485 problem

    Hello Group,like add some info from the block diagram of the AM transmit section,do u think of these might be my problem is it RF amp Q7 or RF pre driver Q8 or RF driver Q9 or RF power amp Q10, there more 2 the block diagram,any 1 input be nice thanks again group for help from before, this what...
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    colt 485 problem

    Thanks psycho and the rest who took interest in my repair project,i hope 2 fine a answer as well on here.Again thanks 2 all for input on this matter.73s for now.
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    colt 485 problem

    Hello Group,like 2 thank all of u for ur input on this matter, sp5it i can not fine that Q50, i do have a copy of the RCA Co-Pilot service manual that has same Cybernet chaise,the block diagram for the Am transmit does not have Q50.
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    colt 485 problem

    Hello Sonar,thanks for replying back,yes that correct everything works except the dead carrier when i key the mic,when i speak there no audio.
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    colt 485 problem

    Hello Group,i got colt 485 black shadow ssb it has Cybernet chaise,friend i got from said that the AM transmit audio use to work then one day it quit,he told me while out driving around in car with new cheap ant,he said the swr might have been abit high how high i do not know,he said the audio...
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