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  1. loosecannon

    is it a grant or cobra

    the channel selector knob and the two switches on the faceplate are clearly from the grant XL. most likely, someone wanted the solid performance of the older grant board but wanted a frequency counter for the extra channels, so they made a combo. i would look as where the frequency counter...
  2. loosecannon

    Calling on some wisdom from the group....

    My suggestion is to get yourself a parts rig if you don't already have one. you may need a crystal or some other part that is almost impossible to find, and chances are there are missing parts if the radio has been modded. also be sure to check for L6 and the associated crystal filter. i can't...
  3. loosecannon

    Palomar RFX95HD

    sure thing! If you're looking to play a bit further with this, you can try replacing C71 with a 47uF cap, and see how that affects the AMC clamping. And if you want to go even further, you can try strapping a 1K resistor across C71. (you can play with this value a bit) these mods change the...
  4. loosecannon

    Palomar RFX95HD

    Good deal Eldorado! Ive honestly never measured the current across this resistor so i can't say for sure what is needed there. everyone just uses 2 or 3 watt resistors there instead of measuring lol. if you are concerned or the 1/4 watt resistor is getting hot when in TX, then you can parallel...
  5. loosecannon

    Palomar RFX95HD

    Eldorado, yes that resistor added to the solder side of the board is the one to change the value on in order to raise the deadkey. less resistance equals higher deadkey. LC
  6. loosecannon

    D104 preamp/compressor board install

    one thing you might want to make sure of is that the negative lead of the battery is only connected to ground when the mic is keyed. other than that it sounds like you've got it nailed. LC
  7. loosecannon

    FatBoy 4 pill HG2879C Amp Review

    575nightrider, your post is actually somewhat understandable, given the current nature of social media in general. In most places, its just a bunch of anonymous accounts all posting their opinions and gripes, and in those places, you'd hardly be the only one with a comment like that. As im...
  8. loosecannon

    Why?

    LOL he sounds like quite a character. Does the 4800 have the board version that uses SMT like the 2950DX? Because i found that the NPC didn't work well in that version, but i also found that it wasn't needed because you almost couldn't make the thing not swing up to max. I can't remember what...
  9. loosecannon

    Why?

    I appreciate the reply. when you say NPC, are you including volting the final along with it? i never do that, but many do, so i feel like i should clarify so we are on the same page. Im also a little confused about what you mean by "certain radios" as the NPC as it pertains to...
  10. loosecannon

    Why?

    The reason i ask is that we generally call the "adding diode to existing resistor" a swing mod, while we call adding the diode/resistor combo to that existing cap an NPC mod. Ive done both and i like the NPC better so i was wondering if you could elaborate on why you like the "swing mod"...
  11. loosecannon

    Why?

    Hawkeye, are you talking about the difference between adding a diode to a certain resistor that already exists, and adding the diode/resistor combo in parallel with a certain existing capacitor? LC
  12. loosecannon

    Amp help

    yeah Shadetree i just don't know. I mean, technically you are trying to feed RF into the collectors of the transistors when you hook it up that way so maybe there is a chance of damage. LC
  13. loosecannon

    Amp help

    i dont know that this would have damaged anything. someone correct me if im wrong here, but it would seem to me that if the input of the amp was connected to the antenna then there would be no RF present and the amp would not have produced any RF power. LC
  14. loosecannon

    Realistic TRC-457 stock, freq issue

    also, if you are measuring at TP8, this chassis drops down 2.5khz on AM TX. so if you measured 35.005 on receive, you'd measure 35.0025 on AM TX. LC
  15. loosecannon

    Un-cripple the newest RCI base 69 "Plus".

    If anyone is wondering what the two cut wires are in Nomad's 4th pic, that's factory and would go to the 10KC switch if they had included one on this model. LC
  16. loosecannon

    REFLECTED POWER

    well a lot of this is above my pay grade, but here is more than you'll ever want to know about this subject: https://www.fars.k6ya.org/docs/Stearns_K6OIK-Conjugate_Match_Myths.pdf it gets interesting around page 28 where they start stating that Maxwell was wrong. LC
  17. loosecannon

    WTB:Freq Counter Galaxy FC 347

    the FC-393 may look the same on the outside but it is completely different on the inside. gone are the easy jumpers to switch between different IF freqs. its all SMT now and using 0402 parts. It can be modified to work with a 7.8mhz IF but it is not easy and should not be your first attempt at...
  18. loosecannon

    Washington (858) high frequency mod?

    are you guys moving to the full windings on both the primary and secondary of L4 and L37? or just on the secondaries? LC
  19. loosecannon

    I ran into a neat little "supply" that will be handy...

    man how many times have i searched the bench for that little screw that keeps the mic connector from turning in its body. thanks for this! LC
  20. loosecannon

    Washington (858) high frequency mod?

    i was hoping someone like nomad would comment on the broadbanding. Nomad, i have heard that doing the L4 broadbanding trick will cause an impedance mismatch but i don't remember where i heard this. any chance you can assuage my concerns about this mod? LC