• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • A Winner has been selected for the 2025 Radioddity Cyber Monday giveaway! Click Here to see who won!

Search results

  1. Cable Guy

    Sams PhotoFacts Collection

    Yeah, you can skip the bill of materials, but the alignment and schematic at least. The diagrams would be nice but not a deal breaker. Did I get this radio from you?
  2. Cable Guy

    Sams PhotoFacts Collection

    Dan, do you happen to have CB122, Zachary T?
  3. Cable Guy

    Any channel plan for FM?

    That's logical.
  4. Cable Guy

    Any channel plan for FM?

    The QRP king. Can't make out what you said but I know you're in there.
  5. Cable Guy

    Schottkey diode/transistor opinions

    Hawk, after alignment if I come across a radio that has any real static or hash with nothing plugged in, aside from a cobra 29 (misadjusted if amp) I would proactively replace the first RF amp and the mixer following. As a post above said, that first amp can take a beating. I would use whatever...
  6. Cable Guy

    Schottkey diode/transistor opinions

    A noisy RF amp transistor or mixer transistor in the front end can cause lots of hash and distortion. I have seen it a few times. But 7 units? With the radio unplugged from the antenna at the back of the radio, do you still get the hash? Edit to add, unless you are replacing a faulty diode or...
  7. Cable Guy

    Galaxy dx99V2 off 4K on various channels

    Same part, different manufacturer, different number. As long as the pin out is correct, which it is. If you do replace them, consider that the orientation is opposite from ic4 and ic5 as indicated by the dot noting pin 1. You could replace just the one, but I will replace both. Also, verify the...
  8. Cable Guy

    Galaxy dx99V2 off 4K on various channels

    It's a CD4008 binary adder. https://www.allelcoelec.com/blog/Mastering-the-CD4008-A-4-Bit-Binary-Full-Adder-IC.html?srsltid=AfmBOoqCbRkvTQwDycFcAe8miI6l5FsoJi7ruLGIhZFuqapM-YFWMqY3 There are 2 adders in this radio, near the pll chip. They are identical chips. I found some Soviet era chips on...
  9. Cable Guy

    Schematic needed, President Madison newest version

    Idk, I have the same username and no issue, also I didn't know the secret sign and just emailed goldfinger, he told me and activated me quickly. He is very nice and professional. He recently had his PC power supply die and wasn't able to activate accounts, but he is back online so try again.
  10. Cable Guy

    Galaxy dx99V2 off 4K on various channels

    I have on many occasions seen the 4008 adders fail unexpectedly. I rarely find a faulty channel switch, and it was usually obvious it had failed. Figuring the logic values is the only way I have verified a failed adder. It is very time consuming. Now, if I suspect an adder, I replace it.
  11. Cable Guy

    Cheap amazon scope probes

    I quit Amazon for quality, it's now like a fast ship AliExpress, I'm gonna start calling it Alizon.
  12. Cable Guy

    Add this to your toolbox!

    Do you have a good source for NP0 ceramic caps?
  13. Cable Guy

    2025 solder flux, what's new?

    I just opened my last jar of everyday no-clean flux paste and it's not available anywhere anymore. I have to use another brand to restock. I like to keep a few options on hand for the different soldering tasks. So, what flux do you use? Why?
  14. Cable Guy

    TRC-448 repairs

    That is very sensible. If you keep learning, you will one day be equipped to repair it. When discouraged by my lack of knowledge and skill I say to myself "I am not smart enough today, maybe next week or next month I can fix it". Let it rest awhile and with enough time and thought, look at it...
  15. Cable Guy

    Add this to your toolbox!

    Good point about ranger and the tolerance of parts used. Temperature is a variable in the function of all electronic parts it seems, I have used hot/cold on things like transistors but never to check for faulty capacitors. The tidbit on charges piling up and leveling, that trick is definitely...
  16. Cable Guy

    Add this to your toolbox!

    I watched to the end, can I order some hot tweezers now? Good stuff in there btw.
  17. Cable Guy

    RCI 6900F w/EPT990013B

    Thanks for looking. All checks were performed with the shorting bar removed and sniffing with the sdr, so no ssb linear issues from incorrect PA bias. I found 2 electrolytic capacitors faulty, replaced but no fix. This radio is probably needing a recap.