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  1. nomadradio

    ISO Autek WM-1 for parts

    Wow! A return from the dead. If the name isn't available, naming it the Lazarus meter probably isn't a marketing strategy to pursue. Would seem strangely apropriate. It will appeal to the analog retentives out there. No digits, Found all the info needed to restore it here...
  2. nomadradio

    Cobra 29LTD Classic PLL/Display problem

    A principle called "Occam's razor" frequently applies to faults like this one. It states that all other things being equal the simplest answer it the most likely. When a fault appears following a repair procedure, a side effect of the repair is probably how the new fault occurred. In this case...
  3. nomadradio

    Noob to tubes- Maco 200

    If you're going to attach it with adhesive, that works just fine. This permits unsoldering the pigail wire from the terminal pin on the insulating block. Unsolder it from each outer pole and connect them directly to the center pin of each coax socket. This tends to reduce the standby SWR the...
  4. nomadradio

    this is funny. "Golden Screwdriver Techs" are warned.

    Nope. Gary's been gone a few years now. As in deceased. 73
  5. nomadradio

    this is funny. "Golden Screwdriver Techs" are warned.

    I remember Wireless Marketing. A former employee of ours set up a bench in his basement and did their warranty repairs. Kept him busy until they went under in a few years. 73
  6. nomadradio

    Hy gain model 488

    A more-common scenario is that someone drove it with excess power and blew out the transistor that senses the radio's RF and closes the relay. The schematic calls it the "RF Sniffer". Has two NPN transistors. Most any generic small NPN transistors would probably do the job okay. 2N3904, 2N2222...
  7. nomadradio

    Swing mod for 2995 and related surface-mount pcb radios.

    Got a request from a customer. Wants a how-to for the diode swing mod applied to a RCI2995DX. The surface-mount main circuit board has the same basic circuits as the older 2950/70/90 radios, just laid out differently. The bill of materials is: 1) 1N4148 small signal diode. There are any...
  8. nomadradio

    Cobra 29 LTD Classic w/RFX95HD

    If you're willing to mount a fan on it. Simple rule to judge a safe operating temperature is to hold your hand against the heat sink surface. If you have to let go after 5 or so seconds, that's pretty much the upper limit. If you have to draw away quickly, that's too hot. Turn down the carrier...
  9. nomadradio

    Noob to tubes- Maco 200

    I checked RF Parts, and they don't have an open-frame relay with a 12-Volt DC coil. Here's a link to the solution we use. https://www.worldwidedx.com/threads/ameritron-al811-relay-headache-solved-my-way.265840/ 73
  10. nomadradio

    Couldn't resist posting this.

    https://packaged-media.redd.it/av5h4bup3usg1/pb/m2-res_720p.mp4?m=DASHPlaylist.mpd&var=sgpssan&v=1&e=1775556000&s=5c064594f80341298dbc7e1fd6e66ab8314b6208 A cheap chuckle. 73
  11. nomadradio

    Browning Mark: 4 old dog ponders new trick.

    The Browning Mark 4A receiver has one crystal for each band it covers. The factory installed one at 22.82 MHz for channels 1-27 and 23.14 for channels 28-59. There was a crystal available to cover 32 channels below channel 1, 22.5 MHz. They were available for years from Barkett Electronics...
  12. nomadradio

    Galaxy DX2517 Troubleshooting Help

    Q37 is the voltage regulator that provides a steady 9 Volts to the transmit/receive switching circuits. If it fluctuates like that, stuff gets twitchy. I became impatient with fixing this regulator circuit. You pretty much have to take Q35, D72 and D73 each loose to test them. We adopted the...
  13. nomadradio

    Galaxy 2517 switches no detent working.

    Whups! My mistake. Didn't look to see if the listing page had a box to specify quantity. The way the shopify page works a small box with the order quantity appears on the page. No box for quantity, no stock on hand. Sorry about that. 73
  14. nomadradio

    Galaxy 2517 switches no detent working.

    This circuit board has all the switches on it. For the price, buying the individual switches and the pain of replacing them seems a lot less attractive. https://stores.goldeneagleradios.com/galaxy-lever-switch-board-with-switches-for-dx2517/ He has individual switches, too. 73
  15. nomadradio

    Galaxy DX2517 Troubleshooting Help

    There must be a McGyver way to evesdrop on that without a 'scope. But a 'scope is the only way I know to ID that fault. This radio demostrates the value of the 30-buck fleabay transistor tester. If your time is worth anything at all, it's a good bang for the buck. 73
  16. nomadradio

    Lightning L6 matching

    Two of them in parallel, best I can tell. The driven element is an unbroken full-wave loop. We used a coax switch that grounded the unused coax of a 4-element antenna built on this model. Didn't seem to affect the match on the coax in use. Never could wrap my mind around that. 73
  17. nomadradio

    Lightning L6 matching

    Inside. Separate coaxes feed into the building. 73
  18. nomadradio

    Realistic / Radio Shack TRC-465 AM Regulator alternate transistor?

    TIP42 with any suffix letter should be an upgrade from the original. 73
  19. nomadradio

    Galaxy DX2517 Troubleshooting Help

    Not if the 7.5 Volt zener is at the top of its 10% tolerance range. 73
  20. nomadradio

    Galaxy DX2517 Troubleshooting Help

    I'm accustomed to just pulling out Q30, 31 and Q33 to test each. D70 and 71 can be tested in circuit. The voltage on IC5 pin 5 has to be higher than pin 6 to make the radio receive. This should put at least 8 Volts onto pin 7. If the voltage on pin 7 is too low, Q33 will partially turn on...